Highly Sensitive Electrical Detection of Sodium Ions Based on Graphene Field-Effect Transistors
Highly Sensitive Electrical Detection of Sodium Ions Based on Graphene Field-Effect Transistors
复制标题
DOI：
10.1143/jjap.50.06ge07
复制
发表时间：
2011-06-01
影响因子：
1.5
通讯作者：
Matsumoto, Kazuhiko
中科院分区：
文献类型：
--
作者：
Sofue, Yasuyuki;Ohno, Yasuhide;Matsumoto, Kazuhiko
我们已经制造了石墨烯场效应晶体管（gfet）来演示对电解质中钠离子的高灵敏度电检测。电解质中的Na离子影响石墨烯通道的电势，导致gfet中的转移曲线随着Na离子浓度的增加而向负方向移动。gfet的转移特性表明，溶液中的Na离子可以在1.0 nM到1.0 mM的浓度范围内有效检测。我们还开发了基于gfet的Na离子传感器，以精确分辨Na离子浓度，用于医疗领域。时间依赖性测量表明，gfet可以实时检测Na离子。这些结果表明，gfet有潜力成为高灵敏度的Na离子传感器。(C) 2011 .日本应用物理学会
We have fabricated graphene field-effect transistors (GFETs) to demonstrate highly sensitive electrical detection of sodium (Na) ions in electrolytes. Na ions in electrolytes affect the electrical potential of graphene channels, resulting in shifts toward a negative direction of the transfer curves in GFETs with increasing Na ion concentration. The transfer characteristics of GFETs indicated that Na ions in solutions were effectively detected over a wide range of concentrations from 1.0 nM to 1.0 mM. We also developed Na ion sensors based on GFETs to have a precise resolution of Na ion concentration to be utilized in the medical field. Time dependence measurement revealed that GFETs detected Na ions in real time. These results indicate that GFETs are potentially capable of being highly sensitive Na ion sensors. (C) 2011 The Japan Society of Applied Physics