Diffusion of Nanoparticles with Activated Hopping in Crowded Polymer Solutions

doi:10.1021/acs.nanolett.0c01058

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	Diffusion of Nanoparticles with Activated Hopping in Crowded Polymer Solutions
	Xue CD ; Shi XH; Tian Y ; Zheng X(郑旭); Hu GQ
发表期刊	NANO LETTERS
	2020-05-13
卷号	20 期号:5 页码:3895-3904
ISSN	1530-6984
摘要	A long-distance hop of diffusive nanoparticles (NPs) in crowded environments was commonly considered unlikely, and its characteristics remain unclear. In this work, we experimentally identify the occurrence of the intermittent hops of large NPs in crowded entangled poly(ethylene oxide) (PEO) solutions, which are attributed to thermally induced activated hopping. We show that the diffusion of NPs in crowded solutions is considered as a superposition of the activated hopping and the reptation of the polymer solution. Such activated hopping becomes significant when either the PEO molecular weight is large enough or the NP size is relatively small. We reveal that the time-dependent non-Gaussianity of the NP diffusion is determined by the competition of the short-time relaxation of a polymer entanglement strand, the activated hopping, and the long-time reptation. We propose an exponential scaling law tau(hop)/tau(e) similar to exp(d/d(t)) to characterize the hopping time scale, suggesting a linear dependence of the activated hopping energy barrier on the dimensionless NP size. The activated hopping motion can only be observed between the onset time scale of the short-time relaxation of local entanglement strands and the termination time scale of the long-time relaxation. Our findings on activated hopping provide new insights into long-distance transportation of NPs in crowded biological environments, which is essential to the delivery and targeting of nanomedicines.
关键词	hopping diffusion DYNAMICS non-Gaussianity MOBILITY activated energy barrier ULTRASOUND crowded polymer solutions CHEMISTRY VISCOSITY ROTATION NANORODS
DOI	10.1021/acs.nanolett.0c01058
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000535255300125
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
项目资助者	Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11832017, 11572335, 11572334, 11802054} ; Chinese Academy of Sciences Key Research Program of Frontier Sciences [QYZDB-SSW-JSC036} ; Chinese Academy of Sciences Strategic Priority Research Program [XDB22040403} ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2019M651106}
论文分区	一类
力学所作者排名	1
RpAuthor	Hu, GQ ; Zheng, X
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85408
专题	非线性力学国家重点实验室
作者单位	1.{Hu Guoqing} Zhejiang Univ Dept Engn Mech Hangzhou 310027 Zhejiang Peoples R China 2.{Hu Guoqing} Zhejiang Univ State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Zhejiang Peoples R China 3.{Xue Chundong, Zheng Xu} Chinese Acad Sci State Key Lab Nonlinear Mech Inst Mech Beijing 100190 Peoples R China 4.{Xue Chundong} Dalian Univ Technol Sch Optoelect Engn & Instrumentat Sci Dalian 116024 Liaoning Peoples R China 5.{Xue Chundong, Shi Xinghua} Univ Chinese Acad Sci Beijing 100149 Peoples R China 6.{Shi Xinghua} Natl Ctr Nanosci & Technol China Beijing 100190 Peoples R China 7.{Tian Yu} Tsinghua Univ State Key Lab Tribol Beijing 100084 Peoples R China
推荐引用方式 GB/T 7714	Xue CD,Shi XH,Tian Y,et al. Diffusion of Nanoparticles with Activated Hopping in Crowded Polymer Solutions[J]. NANO LETTERS,2020,20,5,:3895-3904.
APA	Xue CD,Shi XH,Tian Y,郑旭,&Hu GQ.(2020).Diffusion of Nanoparticles with Activated Hopping in Crowded Polymer Solutions.NANO LETTERS,20(5),3895-3904.
MLA	Xue CD,et al."Diffusion of Nanoparticles with Activated Hopping in Crowded Polymer Solutions".NANO LETTERS 20.5(2020):3895-3904.

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