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The Monitoring of Anisotropic Tracer Nanoparticles by Depolarized Dynamic Light Scattering for Micro-rheology with Improved Contrast and Accuracy 认领 引用 被引量：1
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作者 Bing-Hui Xue Yuan Liu Pan-Chao Yin 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第6期1760-1766,I0013,共7页
Compared to mechanical rheology,micro-rheology(µR)can probe the viscoelasticity of soft matter non-invasively with spatial resolution and broad temporal coverage;however,the measurement quality is undermined by i... Compared to mechanical rheology,micro-rheology(µR)can probe the viscoelasticity of soft matter non-invasively with spatial resolution and broad temporal coverage;however,the measurement quality is undermined by interference from the structural and dynamic inhomogeneity of the tested media.Herein,gold nanorods are dispersed in tested media as tracer particles,and their diffusive dynamics are monitored by depolarized dynamic light scattering for the analysis of the rheological properties of the tested media,as the rotationalranslational dynamics of tracers can be converted to shear modulus via the generalized Stokes-Einstein relation.Because of their strong optical scattering to the laser and the polarization of incident light,the contrast in the dynamics of gold nanorods over the media can be enhanced,rendering the fast and accurate measurement of rheological properties.The method was verified for applications in broad types of substrates,including ergodic systems such as polymer solutions,silica suspensions,non-ergodic gel systems,and biological fluids such as plasma.The critical experimental parameters,for example,tracer size and scattering angle range,are studied for their impact on the measurement quality,and they can be systematically optimized for feasible and practical applications of the developedµR method. 展开更多
关键词 Depolarized dynamic light scattering Micro-rheology Nanorod Gels Rotational dynamics
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Applying dynamic light scattering to investigate the self-assembly process of DNA nanostructures 认领 引用 被引量：1
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作者 Wei Yuan Gui-Zhi Dong +7 位作者 Hui Ning Xiang-Xiang Guan Jia-Feng Cheng Zi-Wei Shi Xiu-Ji Du Si-Wen Meng Dong-Sheng Liu Yuan-Chen Dong 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第3期316-320,共5页
Understanding the dynamic assembly process of DNA nanostructures is important for developing novel strategy to design and construct functional devices.In this work,temperature-controlled dynamic light scattering(DLS)s... Understanding the dynamic assembly process of DNA nanostructures is important for developing novel strategy to design and construct functional devices.In this work,temperature-controlled dynamic light scattering(DLS)strategy has been applied to study the global assembly process of DNA origami and DNA bricks.Through the temperature dependent size and intensity profiles,the self-assembly process of various DNA nanostructures with different morphologies have been well-studied and the temperature transition ranges could be observed.Taking advantage of the DLS information,rapid preparation of the DNA origami and the brick assembly has been realized through a constant temperature annealing.Our results demonstrate that the DLS-based strategy provides a convenient and robust tool to study the dynamic process of forming hieratical DNA structures,which will benefit understanding the mechanism of self-assembly of DNA nanostructures. 展开更多
关键词 Dynamic light scattering Self-assembly process DNA nanostructures Temperature transition ranges Rapid preparation
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In situ nanobubble sizing by visualization particle tracking and image-based dynamic light scattering 认领 引用
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作者 Yang Li Ma Yinhang +5 位作者 Jin Juan Yang Fujun Yang Fang Huang Bin Li Yan Gu Ning 《Journal of Southeast University(English Edition)》 EI CAS 2021年第3期237-244,共8页
A novel method combining visualization particle tracking with image-based dynamic light scattering was developed to achieve the in situ and real-time size measurement of nanobubbles(NBs).First,the in situ size distrib... A novel method combining visualization particle tracking with image-based dynamic light scattering was developed to achieve the in situ and real-time size measurement of nanobubbles(NBs).First,the in situ size distribution of NBs was visualized by dark-field microscopy.Then,real-time size during the preparation was measured using image-based dynamic light scattering,and the longitudinal size distribution of NBs in the sample cell was obtained in a steady state.Results show that this strategy can provide a detailed and accurate size of bubbles in the whole sample compared with the commercial ZetaSizer Nano equipment.Therefore,the developed method is a real-time and simple technology with excellent accuracy,providing new insights into the accurate measurement of the size distribution of NBs or nanoparticles in solution. 展开更多
关键词 real-time acquisition nanobubble(NB)sizing visualization particle tracking image dynamic light scattering Brownian motion
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DYNAMIC LIGHT SCATTERING STUDY ON TRANSLATION DIFFUSION OF 8-ARM STAR POLYSTYRENE IN GOOD AND THETA SOLVENTS 认领 引用
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作者 李峻柏 殷锐 +1 位作者 马荣久 沈家骢 《Chinese Journal of Polymer Science》 SCIE EI CAS 1992年第3期236-241,共6页
The technique of dynamic light scattering has been used to investigate the translation diffusion behavior of 8-arm star polystyrene (SPS)in a good solvent, tetrahydrofuran (THF) or benzene (BZ) and a theta solvent, cy... The technique of dynamic light scattering has been used to investigate the translation diffusion behavior of 8-arm star polystyrene (SPS)in a good solvent, tetrahydrofuran (THF) or benzene (BZ) and a theta solvent, cyclohexane (CH), by homodyne photon correlation spectroscopy .The intensityintensity autocorrelation function was analyzed by the method of cumulant. The translation diffusion coefficients have been obtained as a function of temperature and concentration. Under theta condition ,the non-concentration dependence of diffusion coefficient showed the unperturbed Gaussian state o the SPS molecular chain. The different hydrodynamic radii estimated from Stokes- Einstein equation reflected the stretch extent of the arm chain for regular star polymer. The data of diffusion activation energy of SPS in THF, BZ and CH were also obtained respectively. 展开更多
关键词 Dynamic light scattering Star polystyrene Molecular diffusion
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EARLY CATARACT DETECTION BY DYNAMIC LIGHT SCATTERING WITH SPARSE BAYESIAN LEARNING 认领 引用
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作者 SU-LONG NYEO RAFAT R.ANSAR 《Journal of Innovative Optical Health Sciences》 SCIE EI 2009年第3期303-313,共11页
Dynamic light scattering(DLS)is a promising technique for early cataract detection and for studying cataractogenesis.A novel probabilistic analysis tool,the sparse Bayesian learning(SBL)algorithm,is described for reco... Dynamic light scattering(DLS)is a promising technique for early cataract detection and for studying cataractogenesis.A novel probabilistic analysis tool,the sparse Bayesian learning(SBL)algorithm,is described for reconstructing the most-probable size distribution ofα-crystallin and their aggregates in an ocular lens from the DLS data.The performance of the algorithm is evaluated by analyzing simulated correlation data from known distributions and DLS data from the ocular lenses of a fetal calf,a Rhesus monkey,and a man,so as to establish the required efficiency of the SBL algorithm for clinical studies. 展开更多
关键词 Cataract dynamic light scattering diagnostic algorithm sparse Bayesian learning(SBL).
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Robust particle size distribution recovery in ultra-dilute dynamic light scattering via bi-exponential refitting–guided generalized regression neural network 认领 引用
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作者 Mingyang Zhang Min Xia +2 位作者 Wenping Guo Li Xia Wei Li 《Particuology》 SCIE EI CAS CSCD 2026年第6期1-11,共11页
Dynamic light scattering(DLS)is widely used for particle sizing;however,at ultra-low concentrations,limited acquisition time distorts the intensity autocorrelation function(ACF),and the reduced signal-to-noise ratio f... Dynamic light scattering(DLS)is widely used for particle sizing;however,at ultra-low concentrations,limited acquisition time distorts the intensity autocorrelation function(ACF),and the reduced signal-to-noise ratio further compromises the reliability of particle size distribution(PSD)recovery.To address these challenges,we develop a low-concentration DLS analysis framework based on Bi-exponential Refitting-Guided Generalized Regression Neural Network(BRG-GRNN),where BRG denotes Bi-exponential Refitting-Guided.The measured g(2)(τ)is parameterized by a bi-exponential superposition of a Brownian-motion term and a number-fluctuation term,yielding a forward model that explicitly accounts for number fluctuations.This model is used to generate training data for GRNN,while a genetic algorithm(GA)is employed to automatically select the GRNN smoothing parameterσGRNN.Experimental results obtained from four samples(456,710,805,and 1000 nm)at three low-concentration levels demonstrate that the proposed method effectively mitigates the adverse impact of low concentration on PSD recovery.Compared with the conventional cumulant method,it achieves superior inversion performance.Moreover,the recovered PSDs are in close agreement with those obtained under conventional concentration conditions,with no noticeable discrepancies.Under low-concentration conditions,the maximum relative PSD recovery error is 6.39%,and it remains below 4%in most cases. 展开更多
关键词 Dynamic light scattering Particle size distribution Inversion model Ultra-low concentration Particle number fluctuation Neural network
Advanced Light Scattering Characterization and Physics for Functional Polyelectrolyte Gels 认领 引用 被引量：1
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作者 Yu-Sen Jie Di Jia 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第6期1578-1591,I0007,共14页
Functional gels exhibit unique properties that can be tuned by regulating their physical interactions and microstructures.However,quantifying the strength and fraction of these physical interactions and how they resul... Functional gels exhibit unique properties that can be tuned by regulating their physical interactions and microstructures.However,quantifying the strength and fraction of these physical interactions and how they result in large-scale collective dynamical properties remains a significant challenge.From this perspective,we briefly review the theories and characterization method of light scattering on polyelectrolyte gels,with an emphasis on summarizing our efforts.In particular,we introduce our most recent work on an entirely new universality class of hierarchical gel dynamics for various types of physical gels,which is complementary to the light scattering studies on chemically crosslinked gels in the past five decades.By utilizing the hierarchical gel dynamics,we are able to extract the average bond binding energy of various physical bonds and the physical crosslinking density in the gels.Finally,we evaluated the advantages and limitations of the light scattering method and discussed the future perspectives in this field.It is anticipated that this perspective will facilitate the broad application of light scattering technique in the field of functional gels. 展开更多
关键词 Polyelectrolyte gel Dynamic light scattering Hierarchical gel dynamics Donnan equilibrium Swelling equilibrium
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Development and validation of a static multiple light scattering(SMLS)method for real-time colloidal stability assessment in nanoparticle formulations 认领 引用
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作者 Haiyang Shen Shiqi Huang +5 位作者 Renjie Li Hongliang Wang Yanfang Yang Yuling Liu Jun Ye Xiaohai Ma 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2026年第3期708-722,共15页
This study presents the first development and validation of a static multiple light scattering(SMLS)-based method for real-time,non-invasive assessment of nanoparticle colloidal stability.Nanoparticles,leveraging thei... This study presents the first development and validation of a static multiple light scattering(SMLS)-based method for real-time,non-invasive assessment of nanoparticle colloidal stability.Nanoparticles,leveraging their nanoscale advantages(e.g.,targeted delivery,enhanced drug solubility,and controlled release),hold transformative potential in treating diseases.However,their clinical success hinges on colloidal stability,which dictates in vivo behavior,safety,and regulatory compliance.While dynamic light scattering(DLS)remains widely used,its inability to monitor dynamic transformations and reliance on sample dilution limit its accuracy.Here,we pioneer the application of SMLS to systematically evaluate colloidal stability across standardized particles and commercial nanoparticle formulations(liposomes,nanoparticles,micelles,and nanoemulsions).Results demonstrate that SMLS captures destabilization kinetics(aggregation,sedimentation,and creaming)in real-time without dilution,even at high concentrations,while DLS fails to distinguish polydisperse systems due to time-point sampling.The Turbiscan stability index(TSI)quantifies instability mechanisms,correlating with particle size distribution broadening.This first comprehensive validation of SMLS for nanoparticles reveals its superiority in reflecting native-state behavior,exemplified by minimal or the variations in the average transmission(ΔT)or backscattering intensity(ΔBS)fluctuations and low TSI values in four commercial formulations.By addressing a critical technological gap,this study establishes SMLS as an indispensable tool for optimizing nanoparticle design,ensuring compliance with U.S.Food and Drug Administration(FDA)in-use stability guidelines,and accelerating clinical translation. 展开更多
关键词 Nanoparticle formulations Colloidal stability Static multiple light scattering Dynamic light scattering Drug delivery
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Mercuric ions induced aggregation of gold nanoparticles as investigated by localized surface plasmon resonance light scattering and dynamic light scattering techniques 认领 引用 被引量：2
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作者 WANG Wei LIU Chun +1 位作者 LING Jian HUANG ChengZhi 《Science China Chemistry》 SCIE EI CAS 2013年第6期806-812,共7页
With the development of nanosciences, both localized surface plasmon resonance light scattering （LSPR-LS） and dynamic light scattering （DLS） techniques have been widely used for quantitative purposes with high sen... With the development of nanosciences, both localized surface plasmon resonance light scattering （LSPR-LS） and dynamic light scattering （DLS） techniques have been widely used for quantitative purposes with high sensitivity. In this contribution, we make a comparison of the two light scattering techniques by employing gold nanoparticles （AuNPs） aggregation induced by mercuric ions. It was found that citrate-stabilized AuNPs got aggregated in aqueous medium in the presence of mercuric ions through a chelation process, resulting in greatly enhanced LSPR-LS signals and increased hydrodynamic diameter. The enhanced LSPR-LS intensity （A/） is proportional to the concentration of mercuric ions in the range of 0.4-2.5 laM following the linear regression equation of A/= -84.7＋516.4c, with the correlation coefficient of 0.983 （n = 6） and the limit of determi- nation （3o-） about 0.10 gM. On the other hand, the increased hydrodynamic diameter can be identified by the DLS signals only with a concentration of Hg2＋ in the range of 1.0-2.5 gM, and a linear relationship between the average hydrodynamic diame- ters of the resulted aggregates and the concentration of Hg2＋ can be expressed as d = -6.16 ＋ 45.9c with the correlation coeffi- cient of 0.994. In such case, LSPR-LS signals were further applied to the selective determination of mercuric ions in lake water samples with high sensitivity and simple operation. 展开更多
关键词 gold nanoparticles （AuNPs） localized surface plasmon resonance light scattering （LSPR-LS） dynamic light scattering（DLS） mercury aggregation
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Glucose detection at attomole levels using dynamic light scattering and gold nanoparticles 认领 引用 被引量：1
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作者 MIAO XiangMin FENG ZhaoZhong +1 位作者 TIAN Jun PENG Xue 《Science China Chemistry》 SCIE EI CAS 2014年第7期1026-1031,共6页
Glucose is directly related to brain activity and to diabetes. Therefore, developing a rapid and sensitive method for glucose de- tection is essential. Here, label-free glucose detection at attomole levels was realize... Glucose is directly related to brain activity and to diabetes. Therefore, developing a rapid and sensitive method for glucose de- tection is essential. Here, label-free glucose detection at attomole levels was realized by detecting the average diameter change of gold nanoparticles （AuNPs） utilizing dynamic light scattering （DLS）. Single-strand DNA （ssDNA） adsorbed into the AuNPs＇ surfaces and prevented them from aggregating in solution that contained NaC1. However, ssDNA cleaved onto ssDNA fragments upon addition of glucose, and these fragments could not adsorb onto the AuNPs＇ surfaces. Therefore, in high-salt solution, AuNPs would aggregate and their average diameter would increase. Based on monitoring the average diameter of AuNPs with DLS, glucose could be detected in the range from 15 pmol/L to 2.0 nmol/L, with a detection limit of 8.3 pmol/L. Satisfactory results were also obtained when the proposed method was applied in human serum glucose detection. 展开更多
关键词 glucose dynamic light scattering gold nanoparticles
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Polarized imaging dynamic light scattering for simultaneous measurement of nanoparticle size and morphology 认领 引用 被引量：3
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作者 Bingyao Wang Tianyi Cai +2 位作者 Xiaoshu Cai Wu Zhou Zeqi Liu 《Particuology》 SCIE EI CAS CSCD 2024年第2期213-223,共11页
The performance of nanoparticles is often affected by particle size and morphology.Currently,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of nanoparticles.H... The performance of nanoparticles is often affected by particle size and morphology.Currently,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of nanoparticles.However,there are issues such as difficult sample preparation,long processing times,and challenges in quantitative characterization.Therefore,it is of great significance to develop a fast,accu-rate,and statistical method to measure the size and morphology of nanoparticles.In this study,a new method,called polarized imaging dynamic light scattering(PIDLS),is proposed.The nanoparticles are irradiated with a vertical linearly polarized laser beam,and a polarization camera collected the dynamic light scattering images of particles at four different polarization directions(0°,45°,90°,and 135°)at a scattering angle of 90°.The average particle size and distribution are obtained using the imaging dy-namic light scattering method at 0°polarization direction,and the morphology of the particles is ob-tained based on the depolarization patterns of the scattered light.The optical sphericityΦis defined based on the degree of linear polarization(DoLP).It is also implemented for the quantitative evaluation of the sphericity of the nanoparticles,including spherical,octahedral,nanoplate,nanorod,and linear ones.Together with the Poincarésphere parameterψ,the morphology of the nanoparticles can be roughly identified.In addition,PIDLS enables the measurement of particle size and morphology distributions simultaneously for evaluating the uniformity of particles.The effectiveness of PIDLS is verified by the measurement of five kinds of industrial titanium dioxide as well. 展开更多
关键词 Imaging dynamic light scattering Polarized light scattering Non-spherical nanoparticles Morphology Online measurement
Fast nanoparticle sizing by image dynamic light scattering 认领 引用 被引量：3
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作者 Chengze Xu Xiaoshu Cai +1 位作者 Jie Zhang Lili Liu 《Particuology》 SCIE EI CAS CSCD 2015年第2期82-85,共4页
In this paper, an image dynamic light scattering method for nanoparticle sizing is introduced. The spatial distribution of the scattered lights from nanoparticles undergoing Brownian motion was captured at a high fram... In this paper, an image dynamic light scattering method for nanoparticle sizing is introduced. The spatial distribution of the scattered lights from nanoparticles undergoing Brownian motion was captured at a high frame rate by a digital camera within one second, which is considerably faster than the conven- tional photon correlation spectroscopy method. The captured series of photographs were meshed into thousands of small units for calculating the intensity autocorrelation functions in parallel. Experimental results from the measurements of three reference nanoparticle samples （27, 80, and 352 nm in diameters） demonstrated the feasibility of this method. 展开更多
关键词 Nanoparticle sizing Image dynamic light scattering Real-time acquisition Brownian motion
A regularization algorithm of dynamic light scattering for estimating the particle size distribution of dual-substance mixture in water 认领 引用 被引量：1
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作者 Yanghong Wang Ziqiang Meng +3 位作者 Zipei Zhang Min Xia Li Xia Wei Li 《Particuology》 SCIE EI CAS CSCD 2024年第6期246-257,共12页
Dynamic light scattering(DLS)is a nondestructive,well-established technique for the size characterization of proteins,nanoparticles,polymers,and colloidal dispersions.However,current DLS techniques are only applied to... Dynamic light scattering(DLS)is a nondestructive,well-established technique for the size characterization of proteins,nanoparticles,polymers,and colloidal dispersions.However,current DLS techniques are only applied to particle groups of single composition due to the limitation of their inversion algorithm.In this study,we propose a particle size distribution inversion algorithm based on the Tikhnonov regularization method that can be applied to the dual-substance particle mixture.The algorithm retrieves the particle size distributions of two substances,respectively,by taking advantage of their refractive index differences.The simulation results reveal that the algorithm has excellent accuracy and stability when the scattering angle is 30°.Instead of the original identity matrix,the first-order difference matrix and second-order difference matrix are used as the regular matrix when utilizing the Tikhnonov algorithm,which obviously improves the anti-interference,accuracy,and stability of the algorithm.Furthermore,the inversion of particle size distribution is carried out at a 0.01%–1%noise level,which shows that the algorithm has an available antinoise ability.Finally,experimental particle size measurements for a mixture of polystyrene beads and toner particles demonstrate that the proposed algorithm is superior to the traditional Tikhnonov algorithm in applicability and accuracy. 展开更多
关键词 Dynamic light scattering Dual-substance mixture Particle sized istribution Tikhnonov regularization
Spectroscopic and dynamic light scattering studies of the interaction between pterodontic acid and bovine serum albumin 认领 引用 被引量：2
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作者 Yunfang Li Guangzhong Yang Zhinan Mei 《Acta Pharmaceutica Sinica B》 CAS 2012年第1期53-59,共7页
Pterodontic acid(PA)has been isolated from Laggera pterodonta,a Chinese herbal medicine,and shown to possess antibacterial activity in vitro.To facilitate its preclinical development,the interaction between PA and bov... Pterodontic acid(PA)has been isolated from Laggera pterodonta,a Chinese herbal medicine,and shown to possess antibacterial activity in vitro.To facilitate its preclinical development,the interaction between PA and bovine serum albumin(BSA)was studied using a fluorescence quenching technique,ultraviolet–visible spectrophotometry and dynamic light scattering(DLS).At temperatures of 297 K and 310 K and an excitation wavelength of 282 nm,the fluorescence intensity of BSA decreased significantly with increasing concentration of PA attributed to the formation of a PA–BSA complex.The apparent binding constant,number of binding sites and corresponding thermodynamic parameters were calculated and the main intermolecular attraction shown to result from hydrogen bonding and van der Waals forces.Synchronous fluorescence spectrometry revealed that the binding site in the complex approached the microenvironment of Trp and three-dimensional fluorescence spectroscopy showed the binding induced conformational changes in BSA.Using DLS,increasing PA concentration was shown to cause a gradual increase in hydrodynamic diameter and significant aggregation of the complex. 展开更多
关键词 Pterodontic acid Bovine serum albumin Fluorescence quenching Synchronous fluorescence Three-dimensional fluorescence Dynamic light scattering
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Dissolution and enzymatic hydrolysis of casein micelles studied by dynamic light scattering 认领 引用
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作者 LIU Rui QI Wei +3 位作者 SU Rongxin ZHANG Yubin JIN Fengmin HE Zhimin 《Frontiers of Chemical Science and Engineering》 2007年第2期123-127,共5页
The effects of temperature,ionic strength,and enzymatic hydrolysis on the average hydrodynamic radius(Rh)of casein micelles in phosphate buffer were studied by using dynamic light scattering.The results showed that th... The effects of temperature,ionic strength,and enzymatic hydrolysis on the average hydrodynamic radius(Rh)of casein micelles in phosphate buffer were studied by using dynamic light scattering.The results showed that the average Rh value of casein micelles decreased irreversibly during the heating,decreased with the increase of ionic strength in lower ionic strength solution(less than 0.05 mol/L),but opposite in higher ionic strength solution(above 0.1 mol/L).The Rh value of casein increased rapidly during the process of enzymatic hydrolysis,and the structural model of casein micelles in the enzymatic hydrolysis process was also proposed,i.e.the casein micelle changed from compact sphere into unfolded and regularly flocky peptides. 展开更多
关键词 casein micelles dynamic light scattering hydrodynamic radius enzymatic hydrolysis
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Dynamics of Charged Ring Polymers under Gel Confinement 认领 引用 被引量：2
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作者 Lu-Jie Huo Kai-Ru Qu +1 位作者 Zhen-Zhong Yang Di Jia 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2025年第3期399-405,共7页
Ring polymers are ubiquitous in various fields including biomaterials,drug release and gene therapy.All of these applications involve the dynamics and diffusion process of ring polymers in a confined environment.By us... Ring polymers are ubiquitous in various fields including biomaterials,drug release and gene therapy.All of these applications involve the dynamics and diffusion process of ring polymers in a confined environment.By using dynamic light scattering(DLS),we discovered a dynamical transition for charged ring polymers with increasing ring concentration in the gel matrix from a diffusive state to a non-diffusive topological frustrated state with a more compact conformation.When the ring polymer size is smaller than the mesh size of the gel matrix,the rings are diffusive at low concentration of 5 g/L.The ring diffusion coefficient in the gel matrix is an order of magnitude smaller than that of rings in solution,obeying the Ogston's model.At high ring concentration of 40 g/L,the collective dynamical behavior of the charged rings exhibits a topologically frustrated non-diffusive state,which may originate from the inter-ring threading with the external confinement from the gel matrix.Based on our previous theoretical work,we also conjectured that in such a non-diffusive state,the ring polymers might adopt a more compact conformation with the overall size exponentν=1/3. 展开更多
关键词 Charged ring polymer Dynamics under confinement Non-diffusive topologically frustrated dynamics Dynamic light scattering Collective diffusion coefficient
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Focusing light through turbid and thick scattering media via a hybrid genetic neural network algorithm 认领 引用
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作者 YU LIU PENG SU +3 位作者 JIANHUA HUANG HUIFANG LIN PENGFEI WANG FENG HUANG 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2306-2316,共11页
Over the past decade,techniques for focusing scattered light through dynamic media have made considerable progress,which shows great potential for biomedical imaging,manipulation,and therapy.All of these techniques,ho... Over the past decade,techniques for focusing scattered light through dynamic media have made considerable progress,which shows great potential for biomedical imaging,manipulation,and therapy.All of these techniques,however,follow a default principle that the focusing speed must approach the speckle decorrelation time,which hinders applications in living tissues and deep scattering media.Here,we propose a novel perspective that random speckles contain a substantial amount of ballistic light undergoing high-order diffraction over an extended light path.This finding suggests a potential method for focusing light through turbid media,particularly in situations where only a small amount of scattered light can be detected,provided that the ballistic light can be efficiently separated. 展开更多
关键词 turbid media focusing scattered light dynamic media living tissues hybrid genetic neural network speckle decorrelation time biomedical imagingmanipulationand scattering media ballistic light
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A Simple Modification Results in a Significant Improvement in Measuring the Size of Extracellular Vesicles 认领 引用
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作者 Xiao-jun Liu Zhen-sheng Ma +4 位作者 Yan Li Tai-bing Fan Zhen-wei Ge Zhi-jun Ou Jing-song Ou 《Current Medical Science》 SCIE CAS CSCD 2025年第2期244-252,共9页
Objective Size distribution is an important biophysical property of extracellular vesicles(EVs).EVs include small EVs(s-EVs)and large EVs(l-EVs)by size.Differential ultracentrifugation(dUC)is widely used to separate E... Objective Size distribution is an important biophysical property of extracellular vesicles(EVs).EVs include small EVs(s-EVs)and large EVs(l-EVs)by size.Differential ultracentrifugation(dUC)is widely used to separate EVs from biofluids,but it can precipitate large impurity particles.Dynamic light scattering(DLS)is a simple and fast method for analyzing the size distribution of EVs.However,this approach is nonideal for heterogeneous and polydisperse samples since a small quantity of large impurity particles can markedly disturb the DLS results.Here,we developed a simple method to improve the reliability of DLS measurements.Methods Plasma was obtained from 13 volunteers.The plasma was first processed by dUC to obtain crude l-EVs.The crude l-EVs were filtered with syringe filters(pore size of 1μm and membrane material of hydrophilic polyvinylidene fluoride(PVDF))to remove large impurity particles from l-EVs.The size distributions of the crude l-EVs and filtered l-EVs were measured via DLS.Results After the samples were filtered,the coefficients of variation of the hydrodynamic radius and Peak 1 intensity of the filtered l-EVs decreased from 20.39%(12.76–28.96%)and 20.44%(14.58–28.32%)to 3.05%(1.79–4.72%)and 3.43%(1.76–5.88%),respectively,compared with those of the crude l-EVs.Conclusion These findings suggest that filtration can effectively separate circulating l-EVs in plasma to remove large impurity particles and make samples suitable for characterization by DLS.Our findings provide a simple method to improve precision via DLS to measure the size distribution of EVs. 展开更多
关键词 Extracellular vesicles Plasma Ultracentrifugation Filtration Dynamic light scattering
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Study of asphaltene reaggregation in toluene/heptane mixture by dynamic and static light scattering 认领 引用
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作者 Vladimir N.Kuryakov 《Petroleum Research》 EI 2024年第1期48-54,共7页
This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution,conducted with dynamic light scattering technique.The objects of the study we... This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution,conducted with dynamic light scattering technique.The objects of the study were four samples of asphaltenes obtained from four different oils.For all samples,the change in the average size of the asphaltene submicron aggregates with time was measured after the addition of a precipitant(heptane)to a solution of asphaltenes in toluene at an amount above the threshold concentration.Asphaltene aggregates formed in solution after the addition of the precipitant and were subjected to ultrasonic treatment,which led to the destruction of the asphaltene aggregates.Aggregation of destroyed asphaltenes was observed.The kinetics of this aggregation were similar to the kinetics of aggregation of asphaltenes after the addition of a precipitant.Multiple iterations of asphaltene aggregate destruction in the sample led to a significant change in the kinetics of aggregation:the growth of aggregates slowed and stabilized at a size of approximately 200 nm and 30 nm for the different studied samples. 展开更多
关键词 Asphaltenes Aggregation Sonication Dynamic light scattering Re-aggregation Colloidal stability Resins
Specific ion effect of H+ on variably charged soil colloid aggregation 认领 引用 被引量：7
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作者 Yekun ZHANG Rui TIAN +1 位作者 Jia TANG Hang LI 《Pedosphere》 SCIE CAS CSCD 2020年第6期844-852,共9页
Specific ion effects(Hofmeister effects)have recently attracted the attention of soil scientists,and it has been found that ionic non-classic polarization plays an important role in the specific ion effect in soil.How... Specific ion effects(Hofmeister effects)have recently attracted the attention of soil scientists,and it has been found that ionic non-classic polarization plays an important role in the specific ion effect in soil.However,this explanation cannot be applied to H+.The aim of this work was to characterize the specific ion effect of H+on variably charged soil(yellow soil)colloid aggregation.The total average aggregation(TAA)rate,critical coagulation concentration(CCC),activation energy,and zeta potential were used to characterize and compare the specific ion effects of H+,K+,and Na+.Results showed that strong specific ion effects of H+,K+,and Na+existed in variably charged soil colloid aggregation.The TAA rate,CCC,and activation energy were sensitive to H+,and the addition of a small amount of H+changed the TAA rate,CCC,and activation energy markedly.The zeta potential results indicated that the specific ion effects of H+,K+,and Na+on soil colloid aggregation were caused by the specific ion effects of H+,K+,and Na+on the soil electric field strength.In addition,the origin of the specific ion effect for H+was its chemical adsorption onto surfaces,while those for alkali cations were non-classic polarization.This study indicated that H+,which occurs naturally in variably charged soils,will dominate variably charged soil colloid aggregation. 展开更多
关键词 activation energy chemical adsorption critical coagulation concentration dynamic light scattering Hofmeister effect total average aggregation rate zeta potential
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