Adhesion, Stiffness, and Instability in Atomically Thin MoS2 Bubbles

被引：113

作者：

Lloyd, David ^{[1
]}

Liu, Xinghui ^{[2
]}

Boddeti, Narasimha ^{[2
]}

Cantley, Lauren ^{[1
]}

Long, Rong ^{[2
]}

Dunn, Martin L. ^{[3
]}

Bunch, J. Scott ^{[1
,4
]}

机构：

[1] Boston Univ, Dept Mech Engn, Boston, MA 02215 USA

[2] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[3] Singapore Univ Technol & Design, Singapore 487372, Singapore

[4] Boston Univ, Div Mat Sci & Engn, Brookline, MA 02446 USA

来源：

NANO LETTERS | 2017年 / 17卷 / 09期

基金：

美国国家科学基金会;

关键词：

Adhesion; MoS2; adhesion hysteresis; Young's modulus; friction; bubble; MONOLAYER MOS2; NANOELECTROMECHANICAL SWITCHES; GRAPHENE MEMBRANES; FRACTURE-MECHANICS; BLISTER TEST; CONTACT; SURFACE; STRAIN; SHEETS; ENERGY;

D O I：

10.1021/acs.nanolett.7b01735

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We measured the work of separation of single and few layer MoS2 membranes from a SiOx substrate using a mechanical blister test and found a value of 220 +/- 35 mJ/m(2). Our measurements were also used to determine the 2D Young's modulus (E-2D) of a single MoS2 layer to be 160 +/- 40 N/m. We then studied the delamination mechanics of pressurized MoS2 bubbles, demonstrating both stable and unstable transitions between the bubbles' laminated and delaminated states as the bubbles were inflated. When they were deflated, we observed edge pinning and a snap -in transition that are not accounted for by the previously reported, models. We attribute this result to adhesion, hysteresis and use our results to estimate the work of adhesion -of our membranes to be 42 + 20 mJ/m(2).

引用

页码：5329 / 5334

页数：6

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