Transfer-free CVD graphene for highly sensitive glucose sensors

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（2）
• 页码范围: 71-76
• 页数: 6页
• 语种: 英文

摘要

Chemical vapor deposition (CVD) graphene film is a promising electrode-modifying material for fabricating high-performance glucose sensor due to its high electrical conductivity and two-dimensional structure over large area.However,the use of typical metal-based CVD graphene suffers from the residue contamination of polymer transfer-support and heavy metal ions.In this work,we directly grew fewlayer graphene on the SiO2/Si substrate without transfer process and then fabricated graphene-based glucose sensors by sequentially immobilizing glucose oxidase and depositing Nation layer on its surface that was functionalized by oxygen-plasma treatment.Our transfer-and metal-free process shows distinct advantage over the common metal-CVD method in improving the electrochemical performance by eliminating the contamination of transfer-residue.Thus-obtained glucose sensor shows a high sensitivity (16.16 pA mM-1 cm-2) with a detection limit of 124.19μM.This method is simple and promising for the development of highly sensitive glucose sensors.