Functionalized Multilayered Graphene Platform for Urea Sensor

被引：146

作者：

Srivastava, Rajesh K. ^{[1
,2
]}

Srivastava, Saurabh ^{[1
,3
,4
]}

Narayanan, Tharangattu N. ^{[2
]}

Mahlotra, Bansi D. ^{[3
,4
,5
,6
]}

Vajtai, Robert ^{[2
]}

Ajayan, Pulickel M. ^{[2
]}

Srivastava, Anchal ^{[1
]}

机构：

[1] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[2] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005 USA

[3] Natl Phys Lab, Biomed Instrumentat Sect, Dept Sci, New Delhi 110012, India

[4] Natl Phys Lab, Biomed Instrumentat Sect, Technol Ctr Biomol Elect, New Delhi 110012, India

[5] Chungnam Natl Univ, Ctr NanoBioengn & Spin Tron, Taejon 305764, South Korea

[6] Delhi Technol Univ, Dept Biotechnol, Delhi 11042, India

来源：

ACS NANO | 2012年 / 6卷 / 01期

关键词：

MWCNTs; graphene; biosensor; electron microscopy; X-ray photoelectron spectroscopy; CARBON NANOTUBE FILTERS; RAMAN-SPECTROSCOPY; FILMS; BIOSENSOR; GRAPHITE; SINGLE; SHEETS; OXIDE; ELECTROCHEMISTRY; NANORIBBONS;

D O I：

10.1021/nn203210s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Multilayered graphene (MLG) Is an interesting material for electrochemical sensing and biosensing because of its very large 2D electrical conductivity and large surface area. We propose a less toxic, reproducible, and easy method for producing functionalized multilayer graphene from multiwalled carbon nanotubes (MWCNTs) in mass scale using only concentrated H2SO4/HNO3. Electron microscopy results show the MLG formation, whereas FTIR and XPS data suggest its carboxylic and hydroxyl-functionalized nature. We utilize this functionalized MLG for the fabrication of a novel amperometric urea biosensor. This biosensor shows linearity of 10-100 mg dL(-1), sensitivity of 5.43 mu A mg(-1) dL cm(-2), lower detection limit of 3.9 mg dL(-1), and response time of 10 s. Our results suggest that MLG Is a promising material for electrochemical biosensing applications.

引用

页码：168 / 175

页数：8

共 55 条

[1] Potentiometric urea biosensor based on multi-walled carbon nanotubes (MWCNTs)/silica composite material [J].