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Author:

Qian, Fengsong (Qian, Fengsong.) | Deng, Jun (Deng, Jun.) | Ma, Xiaochen (Ma, Xiaochen.) | Fu, Guosheng (Fu, Guosheng.) | Xu, Chen (Xu, Chen.)

Indexed by:

Scopus SCIE

Abstract:

Vertical graphene (VG) combines the excellent properties of conventional graphene with a unique vertical nanosheet structure, and has shown tremendous promise in the field of electronics and composites. However, its complex surface morphology brings great difficulties to micro-nano fabrication, especially regarding photolithography induced nanosheet collapse and remaining chemical residues. Here, we demonstrate an innovative method for directly growing patterned VG on a SiO2/Si substrate. A patterned Cr film was deposited on the substrate as a barrier layer. The VG was synthesized by PECVD on both the patterned Cr film and the exposed SiO2/Si substrate. During the cooling process, the patterned Cr film covered by VG naturally peeled off from the substrate due to the thermal stress mismatch, while the VG directly grown on the SiO2/Si substrate was remained. The temperature-dependent thermal stress distribution in each layer was analyzed using finite element simulations, and the separation mechanism of the Cr film from the substrate was explained. This method avoids the contamination and damage caused by the VG photolithography process. Our work is expected to provide a convenient and reliable solution for the manufacture of VG-based electronic devices.

Keyword:

vertical graphene plastic deformation warpage direct growth thermal stress mismatch patterning

Author Community:

  • [ 1 ] [Qian, Fengsong]Beijing Univ Technol, Key Lab Optoelect Technol, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Deng, Jun]Beijing Univ Technol, Key Lab Optoelect Technol, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Ma, Xiaochen]Beijing Univ Technol, Key Lab Optoelect Technol, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Xu, Chen]Beijing Univ Technol, Key Lab Optoelect Technol, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Fu, Guosheng]Beihang Univ, Fert Beijing Inst, Sch Microelect, Beijing 100191, Peoples R China

Reprint Author's Address:

  • [Xu, Chen]Beijing Univ Technol, Key Lab Optoelect Technol, Minist Educ, Beijing 100124, Peoples R China;;

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Source :

NANOMATERIALS

Year: 2023

Issue: 7

Volume: 13

5 . 3 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:26

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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