TY - GEN
T1 - A first-principles study on the strain-induced localized electronic properties of dumbbell-shape graphene nanoribbon for highly sensitive strain sensors
AU - Zhang, Qinqiang
AU - Suzuki, Ken
AU - Miura, Hideo
N1 - Funding Information:
ACKNOWLEDGMENT This research activity has been supported partially by Japanese special coordination funds for promoting science and technology, Japanese Grants-in-aid for Scientific Research, and Tohoku University. This research was supported partially by Murata Science Foundation and JSPS KAKENHI Grant Number JP16H06357. The authors would like to express their sincere thanks to the crew of Center for Computational Materials Science of the Institute for Materials Research, Tohoku University for their continuous support of the supercomputing facilities.
Publisher Copyright:
© 2020 The Japan Society of Applied Physics.
PY - 2020/9/23
Y1 - 2020/9/23
N2 - The electronic properties of graphene nanoribbons (GNRs) have a function of the ribbon width. It can vary from metallic-like ones to semiconductive-like ones when the width of single GNR is changed. Therefore, the novel structure of GNRs called dumbbell-shape GNR (DS-GNR) was proposed to achieve the development of highly sensitive, reliable, and deformable strain sensors. The DS-GNR consists of one long narrow GNR coalesced by two wide segments of GNRs at its both ends. The wide segments of the original DSGNR possess the metallic-like electronic properties and the narrow segment of the original DS-GNR has the semiconductive-like electronic properties. In this study, the strain-induced change of the electronic band structure of DSGNR was analyzed by using the first-principles calculations. The range of the applied uniaxial tensile strain on DS-GNR was from 0% to 10%. When the length of the narrow segment of DSGNR is longer than 4.3 nm, the effective bandgap located in the narrow segment changes obviously with the change of applied strain. The result indicates that the piezoresistive effect appears in the narrow segment of DS-GNR, and thus high strain sensitivity of its resistivity can be applied to strain sensors.
AB - The electronic properties of graphene nanoribbons (GNRs) have a function of the ribbon width. It can vary from metallic-like ones to semiconductive-like ones when the width of single GNR is changed. Therefore, the novel structure of GNRs called dumbbell-shape GNR (DS-GNR) was proposed to achieve the development of highly sensitive, reliable, and deformable strain sensors. The DS-GNR consists of one long narrow GNR coalesced by two wide segments of GNRs at its both ends. The wide segments of the original DSGNR possess the metallic-like electronic properties and the narrow segment of the original DS-GNR has the semiconductive-like electronic properties. In this study, the strain-induced change of the electronic band structure of DSGNR was analyzed by using the first-principles calculations. The range of the applied uniaxial tensile strain on DS-GNR was from 0% to 10%. When the length of the narrow segment of DSGNR is longer than 4.3 nm, the effective bandgap located in the narrow segment changes obviously with the change of applied strain. The result indicates that the piezoresistive effect appears in the narrow segment of DS-GNR, and thus high strain sensitivity of its resistivity can be applied to strain sensors.
KW - Dumbbell-shape
KW - First-principles
KW - Graphene nanoribbon
KW - Local electronic properties
KW - Strain-induced
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U2 - 10.23919/SISPAD49475.2020.9241686
DO - 10.23919/SISPAD49475.2020.9241686
M3 - Conference contribution
AN - SCOPUS:85096243675
T3 - International Conference on Simulation of Semiconductor Processes and Devices, SISPAD
SP - 379
EP - 382
BT - 2020 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2020
Y2 - 3 September 2020 through 6 October 2020
ER -