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Proceedings Paper

Study on the electrical control of graphene with single-stranded DNA
Author(s): Young June Kim; Youngmo Jung; Jaebin Choi; Chaehyun Lim; Taikjin Lee; Jae Hun Kim; Minah Seo; Jong Chang Yi; Seok Lee; Chulki Kim
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Paper Abstract

Graphene is a promising material for its exceptional electrical and mechanical properties. Starting with the initial demonstration of isolating a single graphene sheet from graphite, much progress has been made in realizing graphene based devices for diverse applications. Here, we introduce an experiment in which the electrical properties of graphene are modified by coating different-sequence single-stranded deoxyribonucleic acid (ssDNA) molecules. We fabricated a graphene-field effect transistor (FET) by transferring CVD graphene on copper foil onto a Si/SiO2 wafer. A passivation layer opened up windows on the surface of the graphene to enable interaction with liquid buffers. ssDNA molecules with different base sequences were coated onto the active graphene channels. We observed a variation in the Dirac voltage of the ssDNA-coated graphene FETs according to the ssDNA base sequences. Electrical control of the graphene FET is obtained via gating effect of the deposited ssDNAs. We conduct a systematic study of this ssDNAinduced gating effect with different base sequences, concentrations, and lengths of molecules, leading to extraction of characteristic parameters of the graphene FET accordingly.

Paper Details

Date Published: 1 July 2015
PDF: 4 pages
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553C (1 July 2015); doi: 10.1117/12.2185265
Show Author Affiliations
Young June Kim, Korea Institute of Science and Technology (Korea, Republic of)
Hongik Univ. (Korea, Republic of)
Youngmo Jung, Korea Institute of Science and Technology (Korea, Republic of)
Jaebin Choi, Korea Institute of Science and Technology (Korea, Republic of)
Chaehyun Lim, Korea Institute of Science and Technology (Korea, Republic of)
Taikjin Lee, Korea Institute of Science and Technology (Korea, Republic of)
Jae Hun Kim, Korea Institute of Science and Technology (Korea, Republic of)
Minah Seo, Korea Institute of Science and Technology (Korea, Republic of)
Jong Chang Yi, Hongik Univ. (Korea, Republic of)
Seok Lee, Korea Institute of Science and Technology (Korea, Republic of)
Chulki Kim, Korea Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 9655:
Fifth Asia-Pacific Optical Sensors Conference
Byoungho Lee; Sang-Bae Lee; Yunjiang Rao, Editor(s)

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