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Biphasic Resistive Pulses and Ion Concentration Modulation during Particle Translocation through Cylindrical Nanopores
Alternative TitleJOURNAL OF PHYSICAL CHEMISTRY C
Chen KK; Shan L; He SY; Hu GQ(胡国庆); Meng YG; Tian Y; Tian, Y (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2015-04-16
Volume119Issue:15Pages:8329-8335
ISSN1932-7447
AbstractWe investigated the biphasic resistive pulses during particle translocation through cylindrical nanopores at low salt concentration by simulation, and the effects of electrolyte concentration, surface charge, electric potential, and pore geometry were systematically discussed. The formation of positive peaks in the pulses is ascribed to the surface charge on the particle and the pore. The peak current enhancement/decline ratio increases linearly with the particle surface charge density but decreases with the salt concentration increase. We find that there is an optimum electric potential for the peak current enhancement ratio to reach the maximum value. When a negatively charged particle is at the orifice of the pore on the low/high potential side, the ion concentration inside and around the pore is significantly depleted/enriched, while inverse electric potential or inverse surface charge has an opposite effect. The extent of such ion modulation is larger with a longer pore. The peak current enhancement/decline ratio is quantitatively linked to the percent of ion concentration enrichment/depletion inside and around the pore, by considering particle occupied volume and concentration change.
DOI10.1021/acs.jpcc.5b00047
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000353249500042
WOS KeywordSOLID-STATE NANOPORES ; SINGLE-NANOPARTICLE DETECTION ; DNA TRANSLOCATION ; ACCESS RESISTANCE ; SHAPED NANOPORES ; GLASS NANOPORES ; ASPECT-RATIO ; PORE ; CHARGE ; SIMULATION
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationNational Basic Research Program of China [2011CB707603, 2011CB707604] ; National Natural Science Foundation of China [51175281]
DepartmentLNM微纳米流体力学
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49981
Collection非线性力学国家重点实验室
Corresponding AuthorTian, Y (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Chen KK,Shan L,He SY,et al. Biphasic Resistive Pulses and Ion Concentration Modulation during Particle Translocation through Cylindrical Nanopores[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(15):8329-8335.
APA Chen KK.,Shan L.,He SY.,Hu GQ.,Meng YG.,...&Tian, Y .(2015).Biphasic Resistive Pulses and Ion Concentration Modulation during Particle Translocation through Cylindrical Nanopores.JOURNAL OF PHYSICAL CHEMISTRY C,119(15),8329-8335.
MLA Chen KK,et al."Biphasic Resistive Pulses and Ion Concentration Modulation during Particle Translocation through Cylindrical Nanopores".JOURNAL OF PHYSICAL CHEMISTRY C 119.15(2015):8329-8335.
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