Citation:
ZHAO Wen-Bin, WANG Meng-Fan, ZENG Chuan, QI Wei, SU Rong-Xin, HE Zhi-Min. Surface Enhanced Raman Scattering Substrate Base on Band Gap Edge Effect of Photonic Crystal[J]. Chinese Journal of Analytical Chemistry,
;2017, 45(6): 906-913.
doi:
10.11895/j.issn.0253-3820.170023
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In this work, band gap edge effect of photonic crystal (PC) was combined with gold nanoparticles (AuNPs) to fabricate a novel surface enhanced Raman scattering (SERS) substrate (PC-AuNPs). The preparation of PC-AuNPs substrate consisted of three steps. Firstly, SiO2 nanospheres were amino-modified. Then, an opal PC structure was obtained by vertical deposition of SiO2 nanospheres. Finally, AuNPs were loaded on the surface of opal structure. The Raman scattering signal of Rhodamine B (RhB) was detected on PC-AuNPs to evaluate the merits of this new substrate. It was found that the band gap range of photonic crystal and the loading amount of AuNPs were important factors for PC-AuNPs. A good linearity relationship could be obtained between the characteristic peak intensity of RhB and its logarithmic concentration (I=1711lg[RhB (mol/L)]+15244, R2=0.9994). The detection limit reached 1×10-8 mol/L. This method was simple and exhibited good sensitivity and reproducibility for Raman scattering detection, and could provide a novel strategy for the development of SERS substrate.
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