Controllable nano-crack surface for surface enhanced Raman scattering sensing
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Raman spectrum of rhodamine 6G on a controllable nano-crack surface fabricated with imprinting-induced crack is experimentally studied and an average Raman enhancement (EF) of more than 107 is obtained. With the finite difference time domain simulations, the gap coupling resonance of the nano-cracks is analyzed and the raised enhancement electromagnetic field is obtained. For the reproducibility of the nano-crack pattern with width of 30 nm, it is a good candidate for the repeatable and high sensitive surface enhanced Raman scattering sensing.
KeywordsControllable nano-crack surface Surface enhanced Raman scattering Coupling enhancement Reproducible
This work was supported by National Natural Science Foundation of China (61504147, 2140714, 51503206); West Light Foundation of Chinese Academy of Sciences; Fundamental & advanced research projects of Chongqing, China (cstc2013jcyjC00001), Application development project of Chongqing, China (cstc2013yykfC00007), Scientific equipment research project of Chinese Academy of Sciences (Development of THz imaging spectrometer for biomacromolecules) and Chongqing Micro -nano fabrication and inspection Public service platform (cstc2014pt-fwjg0003).