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

Author(s)

Kubo, Andressa M. ^[1] ; Gorup, Luiz F. ^[1] ; Toffano, Leonardo ^[1] ; Amaral, Luciana S. ^[1] ; Rodrigues-Filho, Edson ^[1] ; Mohan, Haider ^[2] ; Aroca, Ricardo ^[2] ; Camargo, Emerson R. ^[1]

Affiliation

^[1] UFSCar Fed Univ Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4 - Canada

• Document type: Journal article
• Source: COLLOIDS AND INTERFACES; v. 1, n. 1 DEC 2017.
• Web of Science Citations: 2

Abstract

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. (AU)

• FAPESP's process: 15/13958-3 - Nanocomposite biomaterials based on thermoresponsive HIDROGELS
• Grantee: Emerson Rodrigues de Camargo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC