A First-principles Study on the Strain-induced Localized Electronic Properties of Dumbbell-shape Graphene Nanoribbon for Highly Sensitive Strain Sensors

2020 ◽  
Author(s):  
Qinqiang Zhang ◽  
Ken Suzuki ◽  
Hideo Miura
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Graphene Nanoribbon ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
First Principles Study ◽  
Highly Sensitive

Theoretical Study of Heterojunction-Like Electronic Properties Between a Semiconductive Graphene Nanoribbon and a Metallic Graphene for Highly Sensitive Strain Sensors

2020 ◽  
Author(s):  
Qinqiang Zhang ◽  
Xiangyu Qiao ◽  
Masasuke Kobayashi ◽  
Ken Suzuki
Keyword(s):  
Electronic Properties ◽  
Ohmic Contact ◽  
Electronic Band Structure ◽  
Graphene Nanoribbons ◽  
Electron Flow ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Sensing Element ◽  
Electronic Band ◽  
Highly Sensitive

Abstract Graphene shows unique super-conductive properties and graphene nanoribbons (GNRs) with band gaps are the candidates for a sensing component of highly sensitive strain sensors. Usually, there is a large energy barrier between electrodes and semiconductors which is not suitable for electron transfer. Therefore, ohmic contact between them is indispensable for fabricating electronic applications. In order to achieve the ohmic contact between external electrodes and detective elements in the devices, the dumbbell-shaped structure of GNRs was proposed for the basic structure of the GNR-based strain sensors, dubbed as dumbbell-shape GNR (DS-GNR). It consists of a long narrow GNR at the center of the structure as the sensing element coalesced with two wider GNRs at both ends of the narrow GNR as the contact components to external electrodes. Both narrow and wide segments of DS-GNR consist of only carbon atoms. The effect of the interaction in the vicinity of the junction area between wide metallic and narrow semiconductive GNRs, however, has not been clearly demonstrated. In this study, first-principles calculations were implemented to the analysis of the electronic band structure of the DS-GNR. It was found that the localized distribution of the energy states of electrons exists in the wide segment of DS-GNR. The changes varied from wide to narrow segment is smooth and observable as strong functions of the length and the width of DS-GNRs. The current-voltage characteristics showed curved semiconductive-like electronic properties with a smooth-electron flow in DS-GNR. Therefore, the DS-GNR has great potential for the use of next-generation highly sensitive and deformable strain sensors.

Electronic properties of graphene nanoribbon doped by boron/nitrogen pair: a first-principles study

2012 ◽  
Vol 21 (2) ◽  
pp. 027102 ◽  
Author(s):  
Jin Xiao ◽  
Zhi-Xiong Yang ◽  
Wei-Tao Xie ◽  
Li-Xin Xiao ◽  
Hui Xu ◽  
...  
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Graphene Nanoribbon ◽  
First Principles Study ◽  
Boron Nitrogen

scholarly journals Understanding the spin-dependent electronic properties of symmetrically far-edge doped zigzag graphene nanoribbon from a first principles study

RSC Advances ◽  
2017 ◽  
Vol 7 (74) ◽  
pp. 46604-46614 ◽  
Author(s):  
Amrit Sarmah ◽  
Pavel Hobza
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
First Principles Study ◽  
Dft Simulations ◽  
Zigzag Graphene Nanoribbons

DFT simulations envision that far-edge doping also induced some tunable spin-dependent properties in the zigzag graphene nanoribbons.

First-principles study of two-dimensional bilayer GaN: structure, electronic properties and temperature effect

2019 ◽  
Vol 58 (SC) ◽  
pp. SCCB35 ◽  
Author(s):  
Tomoe Yayama ◽  
Anh Khoa Augustin Lu ◽  
Tetsuya Morishita ◽  
Takeshi Nakanishi
Keyword(s):  
Temperature Effect ◽  
Electronic Properties ◽  
First Principles ◽  
Two Dimensional ◽  
First Principles Study

scholarly journals Development of Highly Sensitive Strain Sensor Using Area-Arrayed Graphene Nanoribbons

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1701
Author(s):  
Ken Suzuki ◽  
Ryohei Nakagawa ◽  
Qinqiang Zhang ◽  
Hideo Miura
Keyword(s):  
Graphene Nanoribbons ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Bending Test ◽  
Gauge Factor ◽  
Four Point Bending ◽  
Current Voltage ◽  
Highly Sensitive ◽  
Current Voltage Relationship

In this study, a basic design of area-arrayed graphene nanoribbon (GNR) strain sensors was proposed to realize the next generation of strain sensors. To fabricate the area-arrayed GNRs, a top-down approach was employed, in which GNRs were cut out from a large graphene sheet using an electron beam lithography technique. GNRs with widths of 400 nm, 300 nm, 200 nm, and 50 nm were fabricated, and their current-voltage characteristics were evaluated. The current values of GNRs with widths of 200 nm and above increased linearly with increasing applied voltage, indicating that these GNRs were metallic conductors and a good ohmic junction was formed between graphene and the electrode. There were two types of GNRs with a width of 50 nm, one with a linear current–voltage relationship and the other with a nonlinear one. We evaluated the strain sensitivity of the 50 nm GNR exhibiting metallic conduction by applying a four-point bending test, and found that the gauge factor of this GNR was about 50. Thus, GNRs with a width of about 50 nm can be used to realize a highly sensitive strain sensor.

Geometric, electronic properties of Au$_l$Pt$_m$ ($l$+$m$$\leqslant$10) clusters: A first-principles study

2021 ◽  
Author(s):  
Wei-Feng Xie ◽  
Hao-Ran Zhu ◽  
Shi-Hao Wei
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
First Principles ◽  
Density Functional ◽  
Inverse Design ◽  
Functional Theory ◽  
First Principles Study

The structural evolutions and electronic properties of Au$_l$Pt$_m$ ($l$+$m$$\leqslant$10) clusters are investigated by using the first$-$principles methods based on density functional theory (DFT). We use Inverse design of materials by...

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