Gating of single layer graphene using DNA

Jian Lin; Desalegne Teweldebrhan; Khalid Ashraf; Guanxiong Liu; Xiaoye Jing; Zhong Yan; Rong Li; Roger K. Lake; Mihri Ozkan; Alexander A. Balandin; Cengiz S. Ozkan

doi:10.1117/12.826801

20 August 2009 Gating of single layer graphene using DNA

Jian Lin, Desalegne Teweldebrhan, Khalid Ashraf, Guanxiong Liu, Xiaoye Jing, Zhong Yan, Rong Li, Roger K. Lake, Mihri Ozkan, Alexander A. Balandin, Cengiz S. Ozkan

Author Affiliations +

Proceedings Volume 7403, Nanobiosystems: Processing, Characterization, and Applications II; 74030C (2009) https://doi.org/10.1117/12.826801
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

Single strand DNA (ss-DNA) fragments act as negative potential gating agents that increase the hole density in graphene. Patterning of biomolecules on graphene could provide new avenues to modulate the electrical properties. Current-voltage characterization of this hybrid ss-DNA / graphene system indicates a shift of the Dirac point and "intrinsic" conductance after ss-DNA is deposited. The effect of the ss-DNA is to increase the hole density in the graphene. The increased hole density is calculated to be 2 × 10¹² cm^-2. This increase is consistent with the Raman frequency shifts in the G peak and 2D band positions and the corresponding changes in the G-peak full-width half maximum. Ab initio calculations using density functional theory rule out significant charge transfer or modification of the graphene bandstructure in the presence of the ss-DNA fragments.

Citation Download Citation

Jian Lin, Desalegne Teweldebrhan, Khalid Ashraf, Guanxiong Liu, Xiaoye Jing, Zhong Yan, Rong Li, Roger K. Lake, Mihri Ozkan, Alexander A. Balandin, and Cengiz S. Ozkan "Gating of single layer graphene using DNA", Proc. SPIE 7403, Nanobiosystems: Processing, Characterization, and Applications II, 74030C (20 August 2009); https://doi.org/10.1117/12.826801

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