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- W2728153796 abstract "Surface-enhanced Raman scattering (SERS) has the theoretical possibility of detecting chemicals at the single molecular level. This potential is frequently limited, however, by the critical requirements of the surface morphology and mechanical stability of SERS substrates. In this paper, we report a new method for fabricating a SERS substrate with a significantly improved mechanical stability and analytical sensitivity, using cellulose nanofibers (CNFs) and gold nanoparticles (AuNPs). We constructed a uniformly CNFs-textured substrate on a glass surface by means of suppressing the coffee ring effect of the CNF sessile drop and then introduced an AuNP suspension onto the CNFs-textured substrate by taking advantage of the coffee ring effect. A widened detection zone is formed by AuNPs on the CNFs-textured glass, producing a stable SERS substrate for trace analysis and chemical identification. Microscopic and spectroscopic characterizations of the CNF-AuNPs SERS substrate show that the CNFs enhance the stability of both the AuNP clusters and the SERS activity. The CNF-AuNPs SERS substrate is significantly more stable and sensitive than the SERS substrate fabricated by directly depositing the AuNP suspension on a smooth glass surface." @default.
- W2728153796 created "2017-07-14" @default.
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- W2728153796 date "2017-07-11" @default.
- W2728153796 modified "2023-10-03" @default.
- W2728153796 title "Trace Analysis and Chemical Identification on Cellulose Nanofibers-Textured SERS Substrates Using the “Coffee Ring” Effect" @default.
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- W2728153796 doi "https://doi.org/10.1021/acssensors.7b00403" @default.
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