Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers

Dai，Mingjin1,2; Zheng，Wei1,2,8; Zhang，Xi3; Wang，Sanmei3; Lin，Junhao4; Li，Kai5; Hu，Yunxia1,2; Sun，Enwei5; Zhang，Jia2; Qiu，Yunfeng2; Fu，Yongqing6; Cao，Wenwu5; Hu，Ping An1,2,7

2020

10.1021/acs.nanolett.9b03642

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Recent discovery of piezoelectricity that existed in two-dimensional (2D) layered materials represents a key milestone for flexible electronics and miniaturized and wearable devices. However, so far the reported piezoelectricity in these 2D layered materials is too weak to be used for any practical applications. In this work, we discovered that grain boundaries (GBs) in monolayer MoS can significantly enhance its piezoelectric property. The output power of piezoelectric devices made of the butterfly-shaped monolayer MoS was improved about 50% by the GB-induced piezoelectric effect. The enhanced piezoelectricity is attributed to the additional piezoelectric effect induced by the existence of deformable GBs which can promote polarization and generates spontaneous polarization with different piezoelectric coefficients along various directions. We further made a flexible piezoelectric device based on the 2D MoS with the GBs and demonstrated its potential application in self-powered precision sensors for in situ detecting pressure changes in human blood for health monitoring. ©

AC-STEM DFT calculations health monitoring piezoelectric sensors SHG

SCI ; EI

英语

NI期刊

其他

Royal Society[1E161019]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000507151600027

AMER CHEMICAL SOC

20200207991157

Crystallography ; Piezoelectric devices ; Grain boundaries ; Monolayers ; Layered semiconductors ; Polarization ; Flexible electronics ; Molybdenum compounds

Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Electronic Equipment, General Purpose and Industrial:715 ; Crystalline Solids:933.1

MATERIALS SCIENCE

2-s2.0-85077651794

Scopus

1.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin,150001,China
2.MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing,Harbin Institute of Technology,Harbin,150001,China
3.Inst. of Nanosurface Sci. and Eng. and Guangdong Prov. Key Lab. of Micro/Nano Optomechatronics Eng.,Shenzhen University,Shenzhen,518060,China
4.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
5.School of Instrument Science and Engineering,Harbin Institute of Technology,Harbin,150080,China
6.Faculty of Engineering and Environment,Northumbria University,Newcastle upon Tyne,NE1 8ST,United Kingdom
7.Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin,150001,China
8.College of Physics,Qingdao University,Qingdao,266071,China

Dai，Mingjin,Zheng，Wei,Zhang，Xi,et al. Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers[J]. NANO LETTERS,2020,20(1):201-207.

Dai，Mingjin.,Zheng，Wei.,Zhang，Xi.,Wang，Sanmei.,Lin，Junhao.,...&Hu，Ping An.(2020).Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers.NANO LETTERS,20(1),201-207.

Dai，Mingjin,et al."Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers".NANO LETTERS 20.1(2020):201-207.