ACS Appl Mater Interfaces 2021 May 7. Epub 2021 May 7.
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo 315211, P. R. China.
Surface-enhanced Raman scattering (SERS) substrates based on graphene and its derivatives have recently attracted attention among those interested in the detection of trace molecules; however, these substrates generally show poor uniformity, an unsatisfactory enhancement factor, and require a complex fabrication process. Herein, we design and fabricate three-dimensional (3D) graphene/silicon (3D-Gr/Si) heterojunction SERS substrates to detect various types of molecules. Notably, the detection limit of 3D-Gr/Si can reach 10 M for rhodamine 6G (R6G) and rhodamine B (RB), 10 M for crystal violet (CRV), copper(II) phthalocyanine (CuPc), and methylene blue (MB), 10 M for dopamine (DA), 10 M for bovine serum albumin (BSA), and 10 M for melamine (Mel), which is superior to most reported graphene-based SERS substrates. Read More