Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation

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	Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation
	Shu, JN; Wilson, KR; Ahmed, M; Leone, SR; Graf, C; Ruhl, E
刊名	JOURNAL OF CHEMICAL PHYSICS
	2006
卷号	124 期号:3 页码:-
英文摘要	Elastic light scattering is reported using monochromatic vacuum-ultraviolet radiation to study free, spherical silica nanoparticles prepared by approaches from colloidal chemistry, with diameters between 100 and 240 nm. The colloidal nanoparticles of defined size are transferred from an aqueous solution into the gas phase using a particle beam experiment. After focusing of the particle beam by an aerodynamic lens, the scattered light from monochromatic synchrotron radiation is measured. Angle-resolved elastically scattered light is detected, showing a strong forward-scattering component. Additional evidence for the detection of elastically scattered light comes from plotting the scattered light intensity as a function of the dimensionless parameter qR, where q is the magnitude of the scattering wave vector and R is the particle radius. This yields different power-law regimes that are assigned to scattering from the surface and the bulk of the nanoparticles. Furthermore, there is evidence for modulations in the scattered light intensity as a function of scattering angle, which is clearly distinguished from the forward-scattering component. The experimental results are compared to Mie scattering simulations for isolated particles, yielding general agreement with the experimental results. Deviations from Mie simulations are observed for samples consisting of significant amounts of aggregates. The present results indicate that the optical properties of free nanoparticles are sensitively probed by vacuum-ultraviolet radiation. (c) 2006 American Institute of Physics.
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22809]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Shu, JN,Wilson, KR,Ahmed, M,et al. Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation[J]. JOURNAL OF CHEMICAL PHYSICS,2006,124(3):-.
APA	Shu, JN,Wilson, KR,Ahmed, M,Leone, SR,Graf, C,&Ruhl, E.(2006).Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation.JOURNAL OF CHEMICAL PHYSICS,124(3),-.
MLA	Shu, JN,et al."Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation".JOURNAL OF CHEMICAL PHYSICS 124.3(2006):-.