Strain-Induced Band-Gap Tuning of 2D-SnSSe Flakes for Application in Flexible Sensors

Du, Lena1,2,3; Wang, Cong1,4,5; Xiong, Wenqi6; Wei, Bin7; Yang, Fengyou1; Chen, Shengyao1,4; Ma, Lijun1; Wang, Xiaofeng1; Xia, Congxin6; Zhang, Xinzheng4; Wang, Zhongchang7; Liu, Qian1,4

2019-11-27

10.1002/admt.201900853

Advanced Materials Technologies   影响因子和分区

2365-709X

Flexible strain-sensitive-material-based sensors are desired owing to their widespread applications in intelligent robots, health monitoring, human motion detection, and other fields. High electrical-mechanical coupling behaviors of 2D materials make them one of the most promising candidates for miniaturized, integrated, and high-resolution strain sensors, motivating to explore the influence of strain-induced band-gap changes on electrical properties of more materials and assess their potential application in strain sensors. Herein, a ternary SnSSe alloy nanosheet-based strain sensor is reported showing an enhanced gauge factor (GF) up to 69.7 and a good reproducibility and linearity within strain of 0.9%. Such sensor holds high-sensitive features under low strain, and demonstrates an improved sensitivity with a decrease in the membrane thickness. The high sensitivity is attributed to widening band gap and density of states reduction induced by strain, as verified by theoretical model and first-principles calculations. These findings show that a sensor with adjustable strain sensitivity might be realized by simply changing the elemental constituents of 2D alloying materials.

flexible strain sensors SnSSe flakes strain-induced band-gap tuning

SCI ; EI

英语

其他

CAS Strategy Pilot Program[XDA 09020300]

Materials Science

Materials Science, Multidisciplinary

WOS:000498760900001

WILEY

20194907776154

Calculations ; Intelligent robots ; Tin alloys ; Tuning

Tin and Alloys:546.2 ; Robot Applications:731.6 ; Mathematics:921

Web of Science

1.Univ Chinese Acad Sci, Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
2.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
4.Nankai Univ, TEDA Inst Appl Phys, MOE Key Lab Weak Light Nonlinear Photon, Tianjin 300457, Peoples R China
5.Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore
6.Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China
7.Int Iberian Nanotechnol Lab INL, Dept Quantum & Energy Mat, Ave Mestre Jose Veiga S-N, P-4715330 Braga, Portugal

Du, Lena,Wang, Cong,Xiong, Wenqi,et al. Strain-Induced Band-Gap Tuning of 2D-SnSSe Flakes for Application in Flexible Sensors[J]. Advanced Materials Technologies,2019,5(1).

Du, Lena.,Wang, Cong.,Xiong, Wenqi.,Wei, Bin.,Yang, Fengyou.,...&Liu, Qian.(2019).Strain-Induced Band-Gap Tuning of 2D-SnSSe Flakes for Application in Flexible Sensors.Advanced Materials Technologies,5(1).

Du, Lena,et al."Strain-Induced Band-Gap Tuning of 2D-SnSSe Flakes for Application in Flexible Sensors".Advanced Materials Technologies 5.1(2019).