Elastomer-assisted graphene transfer technique for enhanced resonance characteristics in chemisorption-based graphene resonant mass sensors

Motoki Kato; Ken Arano; Masato Saito; Toshinori Fujie; Yuki Imaizumi; Tatsuro Goda; Yong-Joon Choi; Toshihiko Noda; Kazuaki Sawada; Kazuhiro Takahashi

doi:10.1039/D4NR04571H

Elastomer-assisted graphene transfer technique for enhanced resonance characteristics in chemisorption-based graphene resonant mass sensors†

Motoki Kato,^a Ken Arano,^a Masato Saito,^b Toshinori Fujie,

^be Yuki Imaizumi,^c Tatsuro Goda,

^c Yong-Joon Choi,^a Toshihiko Noda,^ad Kazuaki Sawada^ad and Kazuhiro Takahashi

*^ad

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* Corresponding authors

^a Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan
E-mail: takahashi@ee.tut.ac.jp

^b School of Life Science and Technology, Institute of Science Tokyo, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan

^c Department of Biomedical Engineering, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan

^d Institute for Research on Next-generation Semiconductor and Sensing Science (IRES2), Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan

^e Research Center for Autonomous Systems Materialogy (ASMat), Institute of Integrated Research (IIR), Institute of Science Tokyo, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan

Abstract

A process technology was developed for transferring strained graphene sheets using an elastomer nanosheet to enhance the resonance characteristics of a graphene resonator. The strain-induced graphene resonator demonstrated a 1.80-fold improvement in the product of resonant frequency and Q-factor compared to the unstrained resonator. The system exhibited a frequency change in response to single inactivated SARS-CoV-2 whole virus by functionalizing the surface of the strained suspended graphene with a DNA aptamer, indicating a mass sensitivity of 0.99 zg Hz⁻¹, which is 3.5 × 10⁶ times greater than conventional chemisorption-based resonant mass sensors.

Nanoscale

Elastomer-assisted graphene transfer technique for enhanced resonance characteristics in chemisorption-based graphene resonant mass sensors†

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Elastomer-assisted graphene transfer technique for enhanced resonance characteristics in chemisorption-based graphene resonant mass sensors

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