Journal
APPLIED SURFACE SCIENCE
Volume 498, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.143856
Keywords
SERS substrate; Flexible; Poly(oxymethylene); Poly(L-lactic acid); Membranes
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Funding
- Natural Science Foundation of National Key Research and Development Program of China [2017YFB0307704]
- Zhejiang Provincial Key Research and Development Program [2018C01038]
- National Natural Science Foundation of China [21674033]
- Zhejiang Provincial Natural Science Foundation of China [LY15E030014]
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In this work, we have developed a flexible and efficient Surface-enhanced Raman scattering (SERS) substrate by a facile way of fabricating gold nanoparticles (NPs) decorated Poly(oxymethylene)/poly(L-lactic acid) (POM/PLLA) membranes. Firstly, POM/PLLA membranes were aminolyzed by 1,6-hexanediamine to render the membranes with amino groups and porous structure simultaneously. The membranes were then immersed in tetrachloroauric acid (H4AuCl4) solution, where the AuCl4- anions were able to complex with the free amine groups of POM/PLLA, followed by in situ reduction by sodium borohydride to immobilize Au NPs on POM/PLLA membranes. The POM/PLLA/Au membranes exhibited high SERS sensitivity as well as good Raman signal reproductivity for rhodamine 6G (R6G). The minimum detection concentration was 10(-14) M and the enhancement factor was calculated to be 1.54 x 10(9).
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