Open AccessHeterogeneous and cross-distributed metal structure hybridized with MoS2 as high-performance flexible SERS substrate
Author(s) -
Xiaofei Zhao,
Jing Yu,
Zijing Zhang,
Chonghui Li,
Zhen Li,
Shouzhen Jiang,
Jie Pan,
Aihua Liu,
Chao Zhang,
Baoyuan Man
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.023831
Subject(s) - substrate (aquarium) , materials science , x ray photoelectron spectroscopy , raman spectroscopy , scanning electron microscope , raman scattering , melamine , colloidal gold , transmission electron microscopy , nanoparticle , nanotechnology , molecule , nanostructure , chemical engineering , optics , chemistry , oceanography , physics , organic chemistry , engineering , composite material , geology
The heterogeneous metal nanostructures have attracted great interest in various applications due to the synergistic effects between two noble metals, especially in surface enhanced Raman scattering (SERS) region. Herein, we prepared a 3D SERS active substrate based on heterogeneous and cross-distributed metal structure hybridized with MoS 2 by in situ synthesizing gold nanoparticles (AuNPs) on MoS 2 membrane. The AuNPs-AgNPs/MoS 2 /P-Si hybrid SERS substrate were characterized by a scanning electron microscope (SEM), a transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) to investigate the character and the content of elements. In virtue of the heterogeneous and cross-distributed structure and ultra-narrow interparticle gap generating strong electric fields enhancement, the ultra-low concentration of probe molecule were detected (the LOD of 10 -12 M for R6G and CV, 10 -11 M for MG), serving the optimal SERS performance. The excellent uniformity and reproducibility were achieved by the proposed substrate. Moreover, the flexible MoS 2 /AuNPs-AgNPs/PMMA pyramidal SERS substrate was applied to detect melamine molecule in liquid milk (the LOD reached 10 -9 M), which revealed great potential to be an outstanding SERS substrate for biological and chemical detection.