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Nanostructured Assemblies of Gold and Silver Nanoparticles for Plasmon Enhanced Spectroscopy Using Living Biotemplates

1
Department of Chemistry, UFSCar—Federal University of São Carlos, São Carlos SP 13565-905, Brazil
2
Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2017, 1(1), 4; https://doi.org/10.3390/colloids1010004
Received: 19 September 2017 / Revised: 31 October 2017 / Accepted: 1 November 2017 / Published: 4 November 2017
The ability to control the assembly of nanoparticles on substrates used in plasmon-enhanced spectroscopy continues to drive research in the field of nanofabrication. Here we describe the use of fungi as soft biotemplates to fabricate nanostructured microtubules with gold and gold-silver nanoparticles with potential applications as sensors and biosensors. In the first step, spores of the filamentous fungus Cladosporium sphaerospermum were inoculated in a suspension of gold nanoparticles, forming stable microtubules of gold nanoparticles during fungus growth. These materials were exposed to a second suspension of silver nanoparticles, resulting in complexes multilayers structures of gold and silver nanoparticles, which were evaluated as substrates for surface-enhanced Raman scattering (SERS) using small amounts of thiophenol as probe molecules directly on the microtubules. Both gold and the gold-silver substrates provide the SERS effect. View Full-Text
Keywords: surface-enhanced Raman spectroscopy; biotemplate; colloidal nanoparticles surface-enhanced Raman spectroscopy; biotemplate; colloidal nanoparticles
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Kubo, A.M.; Gorup, L.F.; Toffano, L.; Amaral, L.S.; Rodrigues-Filho, E.; Mohan, H.; Aroca, R.; Camargo, E.R. Nanostructured Assemblies of Gold and Silver Nanoparticles for Plasmon Enhanced Spectroscopy Using Living Biotemplates. Colloids Interfaces 2017, 1, 4.

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