Abstract
Bacterial cellulose hydrogels containing gold nanoparticles (AuNPs-BC) were prepared using a cost-effective and environment-friendly in situ synthesis method. Well-dispersed AuNPs were grown on the nanofiber surface of the BC hydrogel, forming substrates of surface-enhanced Raman spectroscopy (SERS). Increases in SERS-active sites in the AuNPs-BC hydrogel caused the enhancement of SERS intensity. The enhancement in SERS intensity of 4-fluorobenzenethiol and phenylacetic acid (PAA), used as test analytes, was compared with spatially-un-deformed AuNPs-BC hydrogels, as well as spatially-deformed AuNPs-BC hydrogels in which the BC layers had contracted during drying. Particularly noteworthy was the detection of PAA by the simple contraction of the substrate, despite a low affinity to surface gold.
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Park, M., Chang, H., Jeong, D.H. et al. Spatial deformation of nanocellulose hydrogel enhances SERS. BioChip J 7, 234–241 (2013). https://doi.org/10.1007/s13206-013-7306-5
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DOI: https://doi.org/10.1007/s13206-013-7306-5