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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND INTERFACES; v. 1, n. 1 DEC 2017.
• Citações Web of Science: 2

Resumo

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)

• Processo FAPESP: 15/13958-3 - Biomateriais nanocompósitos a base de hidrogéis termossensíveis
• Beneficiário: Emerson Rodrigues de Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs