Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 468, Issue -, Pages 309-314Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2014.12.056
Keywords
Surface enhanced Raman spectroscopy (SERS); Cellulose nanofibre (CNF); Gold nanoparticles (AuNPs)
Categories
Funding
- Australian Research Council [ARC LP 110200973]
- McKenzie fellowship (The University of Melbourne)
- IDP Student Mobility Scholarship
- ARC Dairy Innovation Hub
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Poor reproducibility limits the wide uptake of low-cost surface enhanced Raman spectroscopy (SERS) substrates. This study reports a relatively low-cost and reproducible cellulose nanofibre (CNF) textured SERS substrate. Utilizing a layer of CNFs deposited onto glass slides, nanoscale roughness was achieved, which facilitated effective aggregation of gold nanoparticles (AuNPs) to form a novel CNF textured SERS substrate. This substrate meets the critical roughness requirements to control the distribution of AuNPs to provide 'hot spots' for SERS detection, offering significant signal enhancement. The reproducibility and accuracy of low-cost cellulosic SERS substrates were significantly improved on a model SERS molecule of 4-aminothiophenol. (C) 2015 Elsevier B.V. All rights reserved.
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