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Probing Non-Gaussianity in Confined Diffusion of Nanoparticles
Xue CD; Zheng X(郑旭); Chen KK; Tian Y; Hu GQ(胡国庆); Zheng, X (reprint author), Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mechanbiol, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY LETTERS
2016-02-04
Volume7Issue:3Pages:514-519
ISSN1948-7185
AbstractConfined diffusion is ubiquitous in nature. Ever since the "anomalous yet 0 Brownian" motion was observed, the non-Gaussianity in confined diffusion has been unveiled as an important issue. In this Letter, we experimentally investigate the characteristics and source of non-Gaussian behavior in confined diffusion of nanoparticles suspended in polymer solutions. A time-varied and size-dependent non-Gaussianity is reported based on the non-Gaussian parameter and displacement probability distribution, especially when the nanoparticle's size is smaller than the typical polymer mesh size. This non-Gaussianity does not vanish even at the long-time Brownian stage. By inspecting the displacement autocorrelation, we observe that the nanoparticle-structure interaction, indicated by the anticorrelation, is limited in the short-time stage and makes little contribution to the non-Gaussianity in the long-time stage. The main source of the non-Gaussianity can therefore be attributed to hopping diffusion that results in an exponential probability distribution with the large displacements, which may also explain certain processes dominated by rare events in the biological environment.
DOI10.1021/acs.jpclett.5b02624
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000369774400024
WOS KeywordSEGREGATION ; EMBRITTLEMENT ; 1ST-PRINCIPLES ; NICKEL ; IRON ; PHOSPHORUS ; DECOHESION ; SYSTEM ; STEEL ; BORON
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
Funding OrganizationThe authors acknowledge the National Natural Science Foundation of China (11572335, 11272321, and 11202219) and the Ministry of Science and Technology (2011CB707604) for financial support. And we are grateful to the fruitful discussions with Dr. P-Y Jin.
DepartmentLNM微纳米流体力学
Classification一类
RankingTrue
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Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58672
Collection非线性力学国家重点实验室
Corresponding AuthorZheng, X (reprint author), Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mechanbiol, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Xue CD,Zheng X,Chen KK,et al. Probing Non-Gaussianity in Confined Diffusion of Nanoparticles[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2016,7(3):514-519.
APA Xue CD,Zheng X,Chen KK,Tian Y,Hu GQ,&Zheng, X .(2016).Probing Non-Gaussianity in Confined Diffusion of Nanoparticles.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,7(3),514-519.
MLA Xue CD,et al."Probing Non-Gaussianity in Confined Diffusion of Nanoparticles".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 7.3(2016):514-519.
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