journal article·2022-03-25Open access

Large-Area and Clean Graphene Transfer on Gold-Nanopyramid-Structured Substrates: Implications for Surface-Enhanced Raman Scattering Detection

Heping Wu, Gang Niu, Wei Ren, Zhugen Yang, Qihang Xu, Liyan Dai, Luyue Jiang, Shijie Zhai, Jinyan Zhao, Nan Zhang, Libo Zhao, Zhuangde Jiang, Gang Zhao

ACS Applied Nano Materials· Volume 5· Issue 3

Abstract

The transfer of large-area and clean graphene to arbitrary substrates, especially to those with raised nanostructures, represents a great challenge. Polymer-based supporting layers generally lead to organic residues, while graphene transfer using alternative supporting materials like paraffin suffers from breaking and thus limits the transfer area. We demonstrated an improved poly(methyl methacrylate) (PMMA)/paraffin double layer, enabling the large-area transfer of graphene with high cleanliness and high coverage (81%) onto gold nanopyramid (AuNP)-structured substrates. The impact of supporting layers including single PMMA or paraffin and mixed PMMA/paraffin was clarified. The properties of graphene on AuNPs were theoretically and experimentally examined in detail. Raman spectra show a polarization-dependent D peak due to the folding of large-curvature graphene. The graphene on AuNPs shows a slightly tensile strain and provides extra surface-enhanced Raman scattering (SERS) with an enhancement factor of ∼20 times. These findings open a pathway to extend the applications of transferred graphene on raised nanostructures in many fields, such as SERS detection, catalysis, biosensors, light-emitting diodes, solar cells, and advanced transparent conductors.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Graphene research and applications · Gold and Silver Nanoparticles Synthesis and Applications · Graphene and Nanomaterials Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, and The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China

Cranfield Water Science Institute, School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, U.K.

School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

The State Key Laboratory for Manufacturing Systems Engineering and The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China

The College of Life Sciences and Medicine, Northwest University, No. 229 Taibai North Road, Xi’an, Shaanxi 710069, P. R. China

Funding

Central University Basic Research Fund of China · Higher Education Discipline Innovation Project · Shaanxi Province

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