pH-Reversed ionic current rectification displayed by conically shaped nanochannel without any modification

	pH-Reversed ionic current rectification displayed by conically shaped nanochannel without any modification
	Guo ZJ ; Wang JH ; Ren JT ; Wang EK
刊名	nanoscale
	2011
卷号	3 期号:9 页码:3767-3773
关键词	GLASS NANOPORE MEMBRANES STOCHASTIC DETECTION SINGLE NANOCHANNELS SYNTHETIC NANOPORES PROTEIN NANOPORE RESISTIVE-PULSE TRANSPORT PROTONATION ELECTRODES NANOTUBES
ISSN号	2040-3364
通讯作者	wang jh
中文摘要	ion current through a nascent nanochannel with conically shaped geometry in pet (polyethylene terephthalate) membrane sandwiched between two same buffer solutions at ph <= 3 was routinely considered to exhibit no rectification and, if any, much weaker rectification than that for a nanochannel with a negative surface charge, since the surface charge on the membrane decreases to zero along with decreasing the ph value of the buffer solution down to the pk(a) of carboxylic acid. however, in this study, we discovered that in the buffer solution with low ionic strength at ph values below 3, the conically shaped nanochannels exhibited distinct ion current rectification, as expected for nanochannels with a positive surface charge, if voltages beyond +/- 2v range were scanned. we reasoned that the current rectification engendered by the positive surface charge of a conical nanochannel was due to further protonation of the hydrogen bonded hydrogel layer or neutral carboxylic acid inside the nanochannel. therefore, our results enrich the knowledge about nanochannel technology and indicate that a nanofluidic diode based on ph-reversed ion current rectification through a conical nanochannel can be achieved without any modification of the pet membrane.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000294472600047
公开日期	2012-06-12
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/45111]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Guo ZJ,Wang JH,Ren JT,et al. pH-Reversed ionic current rectification displayed by conically shaped nanochannel without any modification[J]. nanoscale,2011,3(9):3767-3773.
APA	Guo ZJ,Wang JH,Ren JT,&Wang EK.(2011).pH-Reversed ionic current rectification displayed by conically shaped nanochannel without any modification.nanoscale,3(9),3767-3773.
MLA	Guo ZJ,et al."pH-Reversed ionic current rectification displayed by conically shaped nanochannel without any modification".nanoscale 3.9(2011):3767-3773.