Electrochemistry at the Edge of a Single Graphene Layer in a Nanopore

被引：102

作者：

Banerjee, Shouvik ^{[1
,2
]}

Shim, Jiwook ^{[2
,3
]}

Rivera, Jose ^{[2
,4
]}

Jin, Xiaozhong ^{[5
,6
]}

Estrada, David ^{[2
,3
]}

Solovyeva, Vita ^{[2
,3
]}

You, Xueqiu ^{[7
]}

Pak, James ^{[7
]}

Pop, Eric ^{[2
,3
,6
]}

Aluru, Narayana ^{[5
,6
]}

Bashir, Rashid ^{[2
,3
,4
]}

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Micro & Nanotechnol Lab, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA

[4] Univ Illinois, Dept Bioengn, Urbana, IL 61801 USA

[5] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[6] Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA

[7] Korea Univ, Sch Elect Engn, Seoul, South Korea

来源：

ACS NANO | 2013年 / 7卷 / 01期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

Nanopores; graphene; graphene electrochemistry; nanobio sensors; stacked graphene; DNA TRANSLOCATION; CARBON; SENSORS; INTERCONNECTS; MODULATION; NANORIBBON; ELECTRODES; DEPOSITION; GRAPHITE; ARRAYS;

D O I：

10.1021/nn305400n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the electrochemistry of single layer graphene edges using a nanopore-based structure consisting of stacked graphene and Al2O3 dielectric layers. Nanopores, with diameters ranging from 5 to 20 nm, are formed by an electron beam sculpting process on the stacked layers. This leads to a unique edge structure which, along with the atomically thin nature of the embedded graphene electrode, demonstrates electrochemical current densities as high as 1.2 x 10(4) A/cm(2). The graphene edge embedded structure offers a unique capability to study the electrochemical exchange at an individual graphene edge, isolated from the basal plane electrochemical activity. We also report ionic current modulation in the nanopore by biasing the embedded graphene terminal with respect to the electrodes in the fluid. The high electrochemical specific current density for a graphene nanopore-based device can have many applications in sensitive chemical and biological sensing, and energy storage devices.

引用

页码：834 / 843

页数：10

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