Debye screening in single-molecule carbon nanotube field-effect sensors.
Debye screening in single-molecule carbon nanotube field-effect sensors.
复制标题
在单分子碳纳米管现场效应传感器中进行DEBYE筛选。
DOI：
10.1021/nl201781q
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发表时间：
2011-09-14
期刊：
影响因子：
10.8
通讯作者：
Shepard KL
中科院分区：
文献类型：
--
作者：
Sorgenfrei S;Chiu CY;Johnston M;Nuckolls C;Shepard KL
Point-functionalized carbon nanotube field-effect transistors can serve as highly sensitive detectors for biomolecules. With a probe molecule covalently bound to a defect in the nanotube sidewall, two-level random telegraph noise (RTN) in the conductance of the device is observed as a result of a charged target biomolecule binding and unbinding at the defect site. Charge in proximity to the defect modulates the potential (and transmission) of the conductance-limiting barrier created by the defect. In this Letter, we study how these single-molecule electronic sensors are affected by ionic screening. Both charge in proximity to the defect site and buffer concentration are found to affect RTN amplitude in a manner that follows from simple Debye length considerations. RTN amplitude is also dependent on the potential of the electrolyte gate as applied to the reference electrode; at high enough repulsive potentials, the target DNA is completely repelled and RTN is suppressed.
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影响因子：
10.8
作者：
Gao XP;Zheng G;Lieber CM
通讯作者：
Lieber CM
DOI：
10.1073/pnas.0837064100
发表时间：
2003-04-29
影响因子：
11.1
作者：
Chen, RJ;Bangsaruntip, S;Dai, HJ
通讯作者：
Dai, HJ
影响因子：
10.8
作者：
Goldsmith, Brett R.;Coroneus, John G.;Collins, Philip G.
通讯作者：
Collins, Philip G.
影响因子：
10.8
作者：
Besteman, K;Lee, JO;Dekker, C
通讯作者：
Dekker, C
影响因子：
56.9
作者：
Kong, J;Franklin, NR;Dai, HJ
通讯作者：
Dai, HJ