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Diffusion of rod-like nanoparticles in non-adhesive and adhesive porous polymeric gels
Wang JL; Yang YW; Yu MR; Hu GQ(胡国庆); Gan Y; Gao HJ; Shi XH(施兴华)
2018-03-01
发表期刊JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷号112页码:431-457
ISSN0022-5096
摘要It is known that rod-like nanoparticles (NPs) can achieve higher diffusivity than their spherical counterparts in biological porous media such as mucus and tumor interstitial matrix, but the underlying mechanisms still remain elusive. Here, we present a joint experimental and theoretical study to show that the aspect ratio (AR) of NPs and their adhesive interactions with the host medium play key roles in such anomalous diffusion behaviors of nanorods. In an adhesive polymer solution/gel (e.g., mucus), hopping diffusion enables nanorods to achieve higher diffusivity than spherical NPs with diameters equal to the minor axis of the rods, and there exists an optimal AR that leads to maximum diffusivity. In contrast, the diffusivity of nanorods decreases monotonically with increasing AR in a non-adhesive polymer solution/gel (e.g., hydroxyethyl cellulose, HEC). Our theoretical model, which captures all the experimental observations, generalizes the so-called obstruction scaling model by incorporating the effects of the NPs/matrix interaction via the mean first passage time (MFPT) theory. This work reveals the physical origin of the anomalous diffusion behaviors of rod-like NPs in biological gels and may provide guidelines for a range of applications that involve NPs diffusion in complex porous media. (C) 2018 Elsevier Ltd. All rights reserved.
关键词Nanoparticle diffusion Shape effect Mucus Nanorods Porous media Mean first passage time
DOI10.1016/j.jmps.2017.12.014
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000426536400024
关键词[WOS]OBSTRUCTION-SCALING MODEL ; ANOMALOUS DIFFUSION ; SOLUTE DIFFUSION ; RAPID-TRANSPORT ; BROWNIAN-MOTION ; MONTE-CARLO ; HUMAN MUCUS ; IN-VIVO ; MECHANISMS ; PARTICLES
WOS研究方向Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS类目Materials Science ; Mechanics ; Physics
项目资助者National Natural Science Foundation of China [11422215, 11272327, 11672079, 81373356, 81573378, 8177130638] ; "Science and technology innovation action plan for basic research" of Shanghai [14JC1493200] ; National Science Foundation [CMMI-1562904] ; Opening fund of State Key Laboratory of Nonlinear Mechanics ; Supercomputing Center of Chinese Academy of Sciences (SCCAS) ; [CASIMM0120153020]
论文分区一类/力学重要期刊
力学所作者排名4
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77919
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, CAS Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarchy Fabricat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China
3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
5.Brown Univ, Sch Engn, Providence, RI 02912 USA
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Wang JL,Yang YW,Yu MR,et al. Diffusion of rod-like nanoparticles in non-adhesive and adhesive porous polymeric gels[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2018,112:431-457.
APA Wang JL.,Yang YW.,Yu MR.,胡国庆.,Gan Y.,...&施兴华.(2018).Diffusion of rod-like nanoparticles in non-adhesive and adhesive porous polymeric gels.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,112,431-457.
MLA Wang JL,et al."Diffusion of rod-like nanoparticles in non-adhesive and adhesive porous polymeric gels".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 112(2018):431-457.
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