Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore

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	Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore
	Wang JR(王俊荣); Ma J; Ni ZH; Zhang L; Hu GQ(胡国庆)
刊名	RSC Advances
	2014
通讯作者邮箱	guoqing.hu@imech.ac.cn
卷号	4 期号:15 页码:7601-7610
关键词	Stress ratio Crack growth rate Fatigue strength Very-high-cycle fatigue Metallic materials
ISSN号	2046-2069
通讯作者	Hu, GQ (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
产权排序	[Wang, Junrong; Hu, Guoqing] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; [Ma, Jian; Ni, Zhonghua] Southeast Univ, Jiangsu Key Lab Design & Manufacture Micronano Bi, Nanjing 211189, Jiangsu, Peoples R China; [Zhang, Li] Synfuels China Technol Co Ltd, Ctr Res & Dev, Beijing 101407, Peoples R China
合作状况	国内
中文摘要	Recent experimental studies showed that the access resistance (AR) of a nanopore with a low thickness-to-diameter aspect ratio plays an important role in particle translocation. The existing theories usually only consider the AR without the presence of particles in the pore systems. Based on the continuum model, we systematically investigate the current change caused by nanoparticle translocation in different nanopore configurations. From numerical results, an analytical model is proposed to estimate the influence of the AR on the resistive-pulse amplitude, i.e., the ratio of the AR to the pore resistance. The current change is first predicted by our model for nanoparticles and nanopores with a wide range of sizes at the neutral surface charge. Subsequently, the effect of surface charges is studied. The results show that resistive-pulse amplitude decreases with the increasing surface charge of the nanoparticle or the nanopore. We also find that the shape of the position-dependent resistive-pulse might be distorted significantly at low bulk concentration due to concentration polarization. This study provides a deep insight into the AR in particle-pore systems and could be useful in designing nanopore-based detection devices.
学科主题	Chemistry
分类号	二类/Q2
收录类别	SCI ; EI
资助信息	This work was financially supported by MOST(2011CB707604), NSFC (11272321, 11102214), and MOST(2011CB707601). We thank Drs Xu Zheng and Zhanhua Silber-Li at LNM for the helpful discussion.
原文出处	http://dx.doi.org/10.1039/c3ra46032k
语种	英语
WOS记录号	WOS:000330241000035
公开日期	2014-05-09
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/48772]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Wang JR,Ma J,Ni ZH,et al. Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore[J]. RSC Advances,2014,4(15):7601-7610.
APA	Wang JR,Ma J,Ni ZH,Zhang L,&Hu GQ.(2014).Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore.RSC Advances,4(15),7601-7610.
MLA	Wang JR,et al."Effects of access resistance on the resistive-pulse caused by translocating of a nanoparticle through a nanopore".RSC Advances 4.15(2014):7601-7610.