MRS Proceedings

Articles

CVD-Grown Graphene Solution-gated Field Effect Transistors for pH Sensing

2010 MRS Fall Meeting.

Benjamin Mailly Giacchettia1a2, Allen Hsua1, Han Wanga1, Ki Kang Kima1, Jing Konga1 and Tomas Palaciosa1

a1 Electrical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States.

a2 Materials Science, Massachusetts Institute of Technology, Cambridge, MA, United States.

ABSTRACT

This paper presents the fabrication technology and initial characterization of electrolyte-gated field effect transistor (FET) arrays based on CVD grown graphene on copper. We show that the graphene FET (GFET), when immersed in electrolytes, exhibit a transconductance around 5 mS/mm. From preliminary pH sensing experiments, a pH sensitivity of 24 mV/pH has been demonstrated.

(Online publication March 21 2011)

Key Words:

  • chemical vapor deposition (CVD) (chemical reaction);
  • sensor;
  • electrical properties
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