1. Roles of graphene nanogap for the AgNFs electrodeposition on the woven Cu net as flexible substrate and its application in SERS
- Author
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Wenyuan Zhang, Ying Shi, Peihong Man, Minghong Wang, Yuanyuan Xu, Cheng Yang, Baoyuan Man, and Zhen Li
- Subjects
Materials science ,Graphene ,chemistry.chemical_element ,Marine fish ,Nanotechnology ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Copper ,0104 chemical sciences ,law.invention ,Rhodamine 6G ,Metal ,chemistry.chemical_compound ,chemistry ,law ,visual_art ,Homogeneity (physics) ,visual_art.visual_art_medium ,General Materials Science ,Crystal violet ,0210 nano-technology ,Close contact - Abstract
A new substrate composing of Ag nanoflowers on graphene@Cu net (AgNFs/G@Cu) was fabricated on the flexible woven copper net. Graphene, an ideal 2D plane, provides better dispersion of regular electrodeposited AgNFs arrays. Graphene nanogap was used to enhance the EM coupling between AgNFs and metal Cu substrate. Regular AgNFs arrays offer denser “hotspots”, which further enhance the EM coupling. High sensitivity (rhodamine 6G (R6G): 10−14 M, crystal violet (CV): 10−12 M) and good homogeneity are realized in our experiment and proved by the COMSOL simulation. Cu net, remarkable flexibility and practicality, allows for a close contact to the sample surface by swabbing. Malachite green (MG) as low as 10−11 M on the surface of the marine fish can be detected. This work may offer novel and practical SERS applications in the areas of pesticide residue, food security and biotechnology.
- Published
- 2018