Mechanism of Electrochemical Delamination of Two-Dimensional Materials from Their Native Substrates by Bubbling

Sensors

Jie Sun¹  Xing Fan¹  Weiling Guo¹  Lihui Liu²  Xin Liu¹  Jun Deng¹  Chen Xu¹ 

[1] Key Laboratory of Optoelectronics Technology, College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China;Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg 41296, Sweden;

关键词: graphene;    chemical vapor deposition;    electrochemical bubbling transfer;   

DOI  :  10.3390/s151229888

来源: mdpi

【 摘 要 】

A capacitor-based circuit model is proposed to explain the electrochemical delamination of two-dimensional materials from their native substrates where produced gas bubbles squeeze into the interface. The delamination is actually the electric breakdown of the capacitor formed between the solution and substrate. To facilitate the procedure, the backside of the ubstrate has to be shielded so that the capacitor breakdown voltage can be reached. The screening effect can be induced either by nonreactive ions around the electrode or, more effectively, by an undetachable insulator. This mechanism serves as a guideline for the surface science and applications involving the bubbling delamination.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.