Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers

Mingjin Dai; Wei Zheng; Xi Zhang; Sanmei Wang; Junhao Lin; Kai Li; Yunxia Hu; Enwei Sun; Jia Zhang; Yunfeng Qiu; Yongqing Fu; Wenwu Cao; Ping An Hu

doi:10.1021/acs.nanolett.9b03642

Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS₂ Monolayers

Mingjin Dai, Wei Zheng, Xi Zhang, Sanmei Wang, Junhao Lin, Kai Li, Yunxia Hu, Enwei Sun, Jia Zhang, Yunfeng Qiu, Yongqing Fu, Wenwu Cao, Ping An Hu

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

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 MoS₂ can significantly enhance its piezoelectric property. The output power of piezoelectric devices made of the butterfly-shaped monolayer MoS₂ 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 MoS₂ 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.

Original language	English (US)
Pages (from-to)	201-207
Number of pages	7
Journal	Nano letters
Volume	20
Issue number	1
DOIs	https://doi.org/10.1021/acs.nanolett.9b03642
State	Published - Jan 8 2020

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.nanolett.9b03642

Cite this

@article{c64de8a7f8114b339c9be41622054cd7,

title = "Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers",

abstract = "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 MoS2 can significantly enhance its piezoelectric property. The output power of piezoelectric devices made of the butterfly-shaped monolayer MoS2 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 MoS2 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.",

author = "Mingjin Dai and Wei Zheng and Xi Zhang and Sanmei Wang and Junhao Lin and Kai Li and Yunxia Hu and Enwei Sun and Jia Zhang and Yunfeng Qiu and Yongqing Fu and Wenwu Cao and Hu, {Ping An}",

note = "Funding Information: We thank Y. Zhang, Prof. S. W. Wu for SHG characterization. This work is supported by the National Natural Science Foundation of China (NSFC, 61390502, 21373068), the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51521003), Self-Planned Task (No. SKLRS201607B) of State Key Laboratory of Robotics and System (HIT), UK Engineering Physics and Science Research Council (EPSRC EP/P018998/1) and the Newton Mobility Grant (IE161019) through the Royal Society and NFSC. Funding Information: We thank Y. Zhang, Prof. S. W. Wu for SHG characterization. This work is supported by the National Natural Science Foundation of China (NSFC, 61390502, 21373068), the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51521003), Self-Planned Task (No. SKLRS201607B) of State Key Laboratory of Robotics and System (HIT), UK Engineering Physics and Science Research Council (EPSRC EP/P018998/1) and the Newton Mobility Grant (IE161019) through the Royal Society and NFSC. Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2020",

month = jan,

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doi = "10.1021/acs.nanolett.9b03642",

language = "English (US)",

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T1 - Enhanced Piezoelectric Effect Derived from Grain Boundary in MoS2 Monolayers

AU - Dai, Mingjin

AU - Zheng, Wei

AU - Zhang, Xi

AU - Wang, Sanmei

AU - Lin, Junhao

AU - Li, Kai

AU - Hu, Yunxia

AU - Sun, Enwei

AU - Zhang, Jia

AU - Qiu, Yunfeng

AU - Fu, Yongqing

AU - Cao, Wenwu

AU - Hu, Ping An

N1 - Funding Information: We thank Y. Zhang, Prof. S. W. Wu for SHG characterization. This work is supported by the National Natural Science Foundation of China (NSFC, 61390502, 21373068), the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51521003), Self-Planned Task (No. SKLRS201607B) of State Key Laboratory of Robotics and System (HIT), UK Engineering Physics and Science Research Council (EPSRC EP/P018998/1) and the Newton Mobility Grant (IE161019) through the Royal Society and NFSC. Funding Information: We thank Y. Zhang, Prof. S. W. Wu for SHG characterization. This work is supported by the National Natural Science Foundation of China (NSFC, 61390502, 21373068), the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51521003), Self-Planned Task (No. SKLRS201607B) of State Key Laboratory of Robotics and System (HIT), UK Engineering Physics and Science Research Council (EPSRC EP/P018998/1) and the Newton Mobility Grant (IE161019) through the Royal Society and NFSC. Publisher Copyright: Copyright © 2019 American Chemical Society.

PY - 2020/1/8

Y1 - 2020/1/8

N2 - 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 MoS2 can significantly enhance its piezoelectric property. The output power of piezoelectric devices made of the butterfly-shaped monolayer MoS2 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 MoS2 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.

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