Open AccessGraphene-Ag nanoparticles-cicada wings hybrid system for obvious SERS performance and DNA molecular detection
Author(s) -
Wen Yang,
Zhen Li,
Zhaogeng Lu,
Jing Yu,
Yanyan Huo,
Baoyuan Man,
Jie Pan,
Huaijun Si,
Shouzhen Jiang,
Chao Zhang
Publication year - 2019
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.27.003000
Subject(s) - biomolecule , graphene , nanotechnology , materials science , raman spectroscopy , substrate (aquarium) , surface enhanced raman spectroscopy , silver nanoparticle , nanoparticle , raman scattering , optics , physics , oceanography , geology
In recent years, biomaterials have increasingly attracted attention on surface-enhanced Raman spectroscopy (SERS) due to their well Raman performance while metal particles are combined with biological substrates. Therefore, we propose an environmentally friendly substrate based on silver-plated cicada wings with seamless graphene layer (Gr-AgNPs-C.w.), which can be prepared with a simple and inexpensive method. Compared with AgNPs-C.w., Gr-AgNPs-C.w. hybrids show better SERS performance with high sensitivity, good uniformity and good stability with R6G detection. The minimum detected concentration can reach 10 -15 M, and the value of R 2 can reach 0.996, respectively. Theoretical simulation demonstrates the situation of electromagnetic field through COMSOL software. In addition, due to the affinity of graphene for biomolecules, we can successfully detect the DNA biomolecules through a simple process. Therefore, this cheap and efficient natural SERS substrate has great potential for a considerable number of biochemical SERS applications and can broaden the way in which multiple SERS platforms derived from other natural materials are prepared.