Superior magnetoresistance performance of hybrid graphene foam/metal sulfide nanocrystal devices

M. Husnain Zeb, Babar Shabbir, Rizwan Ur Rehman Sagar, Nasir Mahmood, Keqiang Chen, Irfan Qasim, Muhammad Imran Malik, Wenzhi Yu, M. Mosarof Hossain, Zhigao Dai, Qingdong Ou, Masroor A. Bhat, Bannur Nanjunda Shivananju, Yun Li, Xian Tang, Kun Qi, Adnan Younis, Qasim Khan, Yupeng Zhang, Qiaoliang Bao

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

Interfaces between metals and semiconducting materials can inevitably influence the magnetotransport properties, which are crucial for technological applications ranging from magnetic sensing to storage devices. By taking advantage of this, a metallic graphene foam is integrated with semiconducting copper-based metal sulfide nanocrystals, i.e., Cu2ZnSnS4 (copper-zinc-tin-sulfur) without direct chemical bonding and structural damage, which creates numerous nanoboundaries that can be basically used to tune the magnetotransport properties. Herein, the magnetoresistance of a graphene foam is enhanced from nearly 90 to 130% at room temperature and under the application of 5 T magnetic field strength due to the addition of Cu2ZnSnS4 nanocrystals in high densities. We believe that the enhancement of magnetoresistance in hybrid graphene foam/Cu2ZnSnS4 nanocrystals is due to the evolution of the mobility fluctuation mechanism, triggered by the formation of nanoboundaries. Incorporating Cu2ZnSnS4 nanocrystals into a graphene foam not only provides an effective way to further enhance the magnitude of magnetoresistance but also opens a suitable window to achieve efficient and highly functional magnetic sensors with a large, linear, and controllable response.

Original languageEnglish
Pages (from-to)19397-19403
Number of pages7
JournalACS Applied Materials & Interfaces
Volume11
Issue number21
DOIs
Publication statusPublished - 29 May 2019

Keywords

  • CuZnSnS nanocrystals
  • graphene foam
  • graphene foam composites
  • magnetic sensors
  • magnetoresistance
  • magnetotransport
  • nanoboundaries

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