One-Dimensional Assembly on Two-Dimensions: AuCN Nanowire Epitaxy on Graphene for Hybrid Phototransistors

Jeongsu Jang, Yangjin Lee, Jun Yeong Yoon, Hoon Hahn Yoon, Jahyun Koo, Jeongheon Choe, Sungho Jeon, Jongbaek Sung, Jungwon Park, Won Chul Lee, Hoonkyung Lee, Hu Young Jeong, Kibog Park, Kwanpyo Kim

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6 Citations (Scopus)

Abstract

The van der Waals epitaxy of functional materials provides an interesting and efficient way to manipulate the electrical properties of various hybrid two-dimensional (2D) systems. Here we show the controlled epitaxial assembly of semiconducting one-dimensional (1D) atomic chains, AuCN, on graphene and investigate the electrical properties of 1D/2D van der Waals heterostructures. AuCN nanowire assembly is tuned by different growth conditions, although the epitaxial alignment between AuCN chains and graphene remains unchanged. The switching of the preferred nanowire growth axis indicates that diffusion kinetics affects the nanowire formation process. Semiconducting AuCN chains endow the 1D/2D hybrid system with a strong responsivity to photons with an energy above 2.7 eV, which is consistent with the bandgap of AuCN. A large UV response (responsivity â104 A/W) was observed under illumination using 3.1 eV (400 nm) photons. Our study clearly demonstrates that 1D chain-structured semiconductors can play a crucial role as a component in multifunctional van der Waals heterostructures.

Original languageEnglish
Pages (from-to)6214-6221
Number of pages8
JournalNano letters
Volume18
Issue number10
DOIs
Publication statusPublished - 2018 Oct 10

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Jang, J., Lee, Y., Yoon, J. Y., Yoon, H. H., Koo, J., Choe, J., Jeon, S., Sung, J., Park, J., Lee, W. C., Lee, H., Jeong, H. Y., Park, K., & Kim, K. (2018). One-Dimensional Assembly on Two-Dimensions: AuCN Nanowire Epitaxy on Graphene for Hybrid Phototransistors. Nano letters, 18(10), 6214-6221. https://doi.org/10.1021/acs.nanolett.8b02259