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light scattering effect of submicro-textured Ag/Al composite films prepared at lower substrate temperatures

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Chinese Physics B 2013年第7期22卷 590-595页

作者：唐平林吴永刚童广德夏子奂刘仁臣梁钊铭周建 Department of Physics Institute of Precision Optical EngineeringTongji University National Electromagnetic scattering Laboratory Institute of No. 802

We present a new and practical approach for preparing submicro-textured silver and aluminum （Ag/Al） double-structured layers at low substrate temperatures. The surface texturing of silver and aluminum double-structured layers was performed by increasing the deposition temperature of the Al layers to 270℃. The highly submicro-textured silver and aluminum double-structured layers were prepared by thermal evaporation on quartz glasses and their surface microstructure, light scattering properties, and thermal stability were investigated. Results showed that the highly submicro-textured Ag/Al composite films prepared at low substrate temperatures used as back reflectors not only can enhance the light scattering and have good thermal stability, but also have good adhesion properties. In addition, their fabrication is low cost and readily carried out.

关键词： random submicro-textured Ag/Al composite films light scattering

light scattering by a spherical particle with multiple densely packed inclusions

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Chinese Physics B 2009年第3期18卷 1040-1044页

作者：孙贤明王海华刘万强申晋 School of Electrical and Electronic Engineering Shandong University of Technology

This paper calculates light scattering by a spherical water particle containing densely packed inclusions at a visible wavelength 0.55 μm by a combination of ray-tracing and Monte Carlo techniques. While the individual reflection and refraction events at the outer boundary of a sphere particle are considered by a ray-tracing program, the Monte Carlo routine simulates internal scattering processes. The main advantage of this method is that the shape of the particle can be arbitrary, and multiple scattering can be considered in the internal scattering processes. A dense-medium light-scattering theory based on the introduction of the static structure factor is used to calculate the phase function and asymmetry parameters for densely packed inclusions. Numerical results of the single scattering characteristics for a sphere containing multiple densely packed inclusions are given.

关键词： ray-tracing technique Monte Carlo method light scattering inclusions

light scattering OF POLYSACCHARIDE FROM LACQUER IN AQUEOUS SOLUTION

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Chinese Journal of Polymer Science 1989年第3期7卷 252-257页

作者：张俐娜杜予民 KUMANOTANI JU Department of Chamistry Wuhan UniversityWuhan Faculty of Engineering Ehime UniversityJapan

The polysaccharide having weight-average molecular weight M_w=1. 09×10~5, isolated from the sap of lac trees (Vietnam), was separated into 12 fractions by aqueous-phase preparative gel permeation chromatography. The molecular weights and molecular weight distributions of the fractions were measured in aqueous 0.08M KCl/0.01 M NaAc and 0.4M KCl/0.05M NaAc at pH =7. 6 by light scattering, viscometry and gel permeation chromatography. The Mark-Houwink equation in aqueous 0.08M KCl/0.01M NaAc at 30℃ was found to be [η]= 2.28×10^(-2) M_w^(0.52) (cm^3/g), which indicated the polysaccharide chain in the aqueous solution to be a spherical random coil.

关键词： light scattering Polysaceharide Lacquer Molecular weight Gel Permeation Chromatography Viscosity.

light scattering and surface plasmons on small spherical particles

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light(Science & Applications) 2014年第1期3卷 182-195页

作者： Xiaofeng Fan Weitao Zheng David J Singh College of Materials Science and Engineering Jilin UniversityChangchun 130012China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831-6056USA

light scattering by small particles has a long and interesting history in ***,it continues to surprise with new insights and *** includes new discoveries,such as novel plasmonic effects,as well as exciting theoretical and experimental developments such as optical trapping,anomalous light scattering,optical tweezers,nanospasers,and novel aspects and realizations of Fano *** have led to important new applications,including several ones in the biomedical area and in sensing techniques at the single-molecule *** are additionally many potential future applications in optical devices and solar energy *** we review the fundamental aspects of light scattering by small spherical particles,emphasizing the phenomenological treatments and new developments in this field.

关键词： light scattering Mie theory nano-optics small particles surface plasmons

light scattering based analyses of the effects of bovine serum proteins on interactions of magnetite spherical particles with cells

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Chinese Chemical Letters 2018年第8期29卷 1291-1295页

作者： Lingling Guo Ting Wang Zhan Chen Nongyue He Yaozhong Chen Tao Yuan State Key Laboratory of Bioelectronics National Demonstration Center for Experimental Biomedical Engineering Education School of Biological Science and Medical Engineering Southeast University Department of Chemistry University of Michigan Department of Orthopedic NanjingJinling Hospital

Information concerns endocytosis and autophagic effects of magnetite particles is crucial for understanding the particle-cell interactions. In this work, we investigated the effects of bovine serum proteins on the endocytosis of magnetite spherical particles（MSPs）. Autophagic effects of MSPs in breast cancer cells were studied. light scattering based flow cytometry and microscopy were used for evaluating the uptake potential of MSPs by cells and the cellular autophagosome accumulation. Results showed bovine serum proteins significantly reduced the endocytosis of MSPs by decreasing their adsorption to cell membranes. Additionally, serum proteins had influences on the endocytic mechanisms of *** accumulation could be caused by the internalized MSPs rather than the particles associated with cell membrane. Above fundamental findings promote our understandings upon the interactions of MSPs with cells. light scattering based methods were proved to be simple and *** present work may promote their application in studies upon endocytosis of metallic particles in the future.

关键词： light scattering Endocytosis Autophagic effects Autophagosome Magnetite spherical particles

Geometrical optics approximation of light scattering by large air bubbles

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Particuology 2008年第5期6卷 340-346页

作者： Haitao Yu Jianqi Shen Yuehuan Wei University of Shanghai for Science and Technology Shanghai 200093 China

For large spherical bubbles in water, geometrical optics approximation is considered a better method for calculating light scattering patterns. In this paper, the basic theory of geometrical optics approximation is clarified. The change of phase for bubbles is calculated when total reflection occurs, which is different from particles with relative refractive indices larger than 1. Verification of the method was achieved by assuming a spherical particle and comparing present results to Mie scattering and Debye calculation. Agreement with the Mie theory was excellent in all directions when the dimensionless size parameter is larger than 50. Limitations of the geometrical optics approximation are also discussed.

关键词： Geometrical optics approximation light scattering Total reflection

Theoretical studies on particle shape classification based on simultaneous small forward angle light scattering and aerodynamic sizing

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Chinese Physics B 2016年第3期25卷 178-184页

作者：张金碧丁蕾王颖萍张莉吴金雷郑海洋方黎 Laboratory of Environmental Spectroscopy Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China University of Chinese Academy of Sciences Beijing 100049China

Particle shape contributes to understanding the physical and chemical processes of the atmosphere and better ascer- taining the origins and chemical compositions of the particles. The particle shape can be classified by the aspect ratio. which can be estimated through the asymmetry factor measured with angularly resolved light scattering. An experimental method of obtaining the asymmetry factor based on simultaneous small forward angle light scattering and aerodynamic size measurements is described briefly. The near forward scattering intensity signals of three detectors in the azimuthal angles at 120° offset are calculated using the methods of T-matrix and discrete dipole approximation. Prolate spheroid particles with different aspect ratios are used as the shape models with the assumption that the symmetry axis is parallel to the flow axis and perpendicular to the incident light. The relations between the asymmetry factor and the optical size and aerodynamic size at various equivalent sizes, refractive indices, and mass densities are discussed in this paper. The numerically calculated results indicate that an elongated particle may be classified at diameter larger than 1.0 μm, and may not be distinguished from a sphere at diameter less than 0.5 μm. It is estimated that the lowest detected aspect ratio is around 1.5： I in consideration of the experimental errors.

关键词： particle shape aspect ratio asymmetry factor light scattering

COMPOSITION DETERMINATION OF BINARY POLYMER MIXTURES BY SIZE EXCLUSION CHROMATOGRAPHY WITH light scattering DETECTION

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Chinese Journal of Polymer Science 2010年第3期28卷 291-297页

作者：程镕时 Key Laboratory of Mesoscopic Chemistry of MOE College of Chemistry and Chemical Engineering Nanjing University College of Materials Science and Engineering South China University of Technology

Base on the principle of absolute quantification of size exclusion chromatography （SEC）, a light scattering （LS） detector coupled with a concentration detector （refractive index detector） is utilized to determine the compositions of complicated binary mixtures. A theoretical analysis predicts that the response factors for both LS and RI detectors are linear functions with the composition of any specified polymer mixtures in the binary polymer mixtures. Two pairs of complicated binary mixtures were used to test the theory mentioned in the present paper, and the experimental results show an excellent accordance with the theory.

关键词： Size exclusion chromatography light scattering Composition of binary mixture Absolute quantification Response factor.

A new kind of superimposing morphology for enhancing the light scattering in thin film silicon solar cells： Combining random and periodic structure

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Chinese Physics B 2014年第8期23卷 350-356页

作者： Huang Zhen-Hua Institute of Photo-electronics Thin Film Devices and Technique of Nankai University Tianjin 300071 China Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin Tianjin 300071 China Key Laboratory of Photo-electronic Information Science and Technology of Ministry of Education (Nankai University) Tianjin 300071 China

In this article, a new type of superimposing morphology comprised of a periodic nanostructure and a random structure is proposed for the first time to enhance the light scattering in silicon-based thin film solar cells. According to the framework of the Reyleigh-Sommerfeld diffraction algorithm and the experimental results of random morphologies, we analyze the light-scattering properties of four superimposing morphologies and compare them with the individual morphologies in detail. The results indicate that the superimposing morphology can offer a better light trapping capacity, owing to the coexistence of the random scattering mechanism and the periodic scattering mechanism. Its scattering property will be dominated by the individual nanostructures whose geometrical features play the leading role.

关键词： light scattering superimposing morphology random periodic