Selective Synthesis of Bi2Te3/WS2 Heterostructures with Strong Interlayer Coupling

被引：9

作者：

Kahn, Ethan ^{[3
,4
]}

Lucking, Michael ^{[5
]}

Zhang, Fu ^{[3
,4
]}

Lei, Yu ^{[3
,4
]}

Granzier-Nakajima, Tomotaroh ^{[4
,6
]}

Grasseschi, Daniel ^{[7
]}

Beach, Kory ^{[5
]}

Murray, William ^{[8
]}

Yeh, Yin-Ting ^{[6
]}

Elias, Ana Laura ^{[4
,6
]}

Liu, Zhiwen ^{[8
]}

Terrones, Humberto ^{[5
]}

Terrones, Mauricio ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Phys, Dept Mat Sci & Engn, Ctr 2 Dimens & Layered Mat, 104 Davey Lab, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[4] Penn State Univ, Ctr 2 Dimens & Layered Mat, University Pk, PA 16802 USA

[5] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA

[6] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[7] Fed Univ Rio De Janeiro UFRJ, Inst Chem, Surface Chem & Nanomat Lab, BR-21941909 Rio De Janeiro, Brazil

[8] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 26期

基金：

美国国家科学基金会;

关键词：

WS2; Bi2Te3; heterostructures; interlayer coupling; moire; DER-WAALS EPITAXY; TOPOLOGICAL INSULATOR; RAMAN-SPECTROSCOPY; GROWTH; WS2; NANOSTRUCTURES; DISULFIDE; BI2SE3; FILMS;

D O I：

10.1021/acsami.0c03656

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The vertical integration of atomically thin-layered materials to create van der Waals heterostructures (vdWHs) has been proposed as a method to design nanostructures with emergent properties. In this work, epitaxial Bi2Te3/WS2 vdWHs are synthesized via a two-step vapor deposition process. It is calculated that the vdWH has an indirect band gap with a valence band edge that bridges the vdW gap, resulting in a quenched photoluminescence (PL) from the WS2 monolayer, reduced intensity of its resonance Raman vibrational peaks, improved vertical charge transport, and a decrease in the intensity of second harmonic generation (SHG). Furthermore, it is observed that induced defects strongly influence the nucleation and growth of vdWHs. By creating point defects in WS2 monolayers, it is shown that the growth of Bi2Te3 platelets can be patterned. This work offers important insights into the synthesis, defect engineering, and moire engineering of an emerging class of two-dimensional (2D) heterostructures.

引用

页码：29575 / 29582

页数：8

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