| Title |
Observation of piezoelectricity in free-standing monolayer MoS2
|
|---|---|
| Published in |
Nature Nanotechnology, December 2014
|
| DOI | 10.1038/nnano.2014.309 |
| Pubmed ID | |
| Authors |
Hanyu Zhu, Yuan Wang, Jun Xiao, Ming Liu, Shaomin Xiong, Zi Jing Wong, Ziliang Ye, Yu Ye, Xiaobo Yin, Xiang Zhang |
| Abstract |
Piezoelectricity allows precise and robust conversion between electricity and mechanical force, and arises from the broken inversion symmetry in the atomic structure. Reducing the dimensionality of bulk materials has been suggested to enhance piezoelectricity. However, when the thickness of a material approaches a single molecular layer, the large surface energy can cause piezoelectric structures to be thermodynamically unstable. Transition-metal dichalcogenides can retain their atomic structures down to the single-layer limit without lattice reconstruction, even under ambient conditions. Recent calculations have predicted the existence of piezoelectricity in these two-dimensional crystals due to their broken inversion symmetry. Here, we report experimental evidence of piezoelectricity in a free-standing single layer of molybdenum disulphide (MoS2) and a measured piezoelectric coefficient of e11 = 2.9 × 10(-10) C m(-1). The measurement of the intrinsic piezoelectricity in such free-standing crystals is free from substrate effects such as doping and parasitic charges. We observed a finite and zero piezoelectric response in MoS2 in odd and even number of layers, respectively, in sharp contrast to bulk piezoelectric materials. This oscillation is due to the breaking and recovery of the inversion symmetry of the two-dimensional crystal. Through the angular dependence of electromechanical coupling, we determined the two-dimensional crystal orientation. The piezoelectricity discovered in this single molecular membrane promises new applications in low-power logic switches for computing and ultrasensitive biological sensors scaled down to a single atomic unit cell. |
X Demographics
The data shown below were collected from the profiles of 4 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 25% |
| United Kingdom | 1 | 25% |
| Unknown | 2 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 4 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 658 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 8 | 1% |
| United Kingdom | 3 | <1% |
| China | 2 | <1% |
| Costa Rica | 1 | <1% |
| Brazil | 1 | <1% |
| Germany | 1 | <1% |
| Belgium | 1 | <1% |
| Netherlands | 1 | <1% |
| Spain | 1 | <1% |
| Other | 1 | <1% |
| Unknown | 638 | 97% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 235 | 36% |
| Researcher | 97 | 15% |
| Student > Master | 55 | 8% |
| Professor > Associate Professor | 39 | 6% |
| Student > Bachelor | 36 | 5% |
| Other | 85 | 13% |
| Unknown | 111 | 17% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 168 | 26% |
| Materials Science | 164 | 25% |
| Engineering | 113 | 17% |
| Chemistry | 36 | 5% |
| Energy | 8 | 1% |
| Other | 26 | 4% |
| Unknown | 143 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 50. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 31 July 2023.
All research outputs
#775,362
of 24,039,735 outputs
Outputs from Nature Nanotechnology
#752
of 3,554 outputs
Outputs of similar age
#10,402
of 360,700 outputs
Outputs of similar age from Nature Nanotechnology
#11
of 74 outputs
Altmetric has tracked 24,039,735 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 96th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 3,554 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 37.4. This one has done well, scoring higher than 78% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 360,700 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 97% of its contemporaries.
We're also able to compare this research output to 74 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 86% of its contemporaries.