SERS-active carboxymethyl cellulose-based gold nanoparticles: high-stability in hypersaline solution and selective response in the Hofmeister series

Autor(es)

de Melo, Fernando Menegatti ^[1] ; Fante, Allef Soares ^[2] ; Zamarion, Vitor de M. ^[1] ; Toma, Henrique Eisi ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Fundamental Chem, Av Prof Lineu Prestes, BR-05508000 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Pharmaceut Sci, Av Prof Lineu Prestes, BR-05508000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NEW JOURNAL OF CHEMISTRY; v. 43, n. 21, p. 8093-8100, JUN 7 2019.
• Citações Web of Science: 0

Resumo

Gold nanoparticles (AuNP) were directly synthesized with sodium carboxymethyl cellulose (CMC) by a simple one-pot procedure, exhibiting surprising protection against salt-induced aggregation. The AuNP@CMC nanoparticles are reactive towards thiol ligands such as 4-mercaptopyridine (4MPy) and 2,4,6-trimercapto-1,3,5-triazine (TMT) indicating a labile character for the CMC coating. Aggregation can be promoted by those ligands combined with salt induced effects along the Hofmeister series, allowing one to explore the local enhanced electric fields (hot spots) as surface enhanced Raman (SERS) sensors. Such behavior is selective for several salts within the Hofmeister series, exposing the role of the ligand exchange dynamics in the system. (AU)

• Processo FAPESP: 17/09469-2 - Desenvolvimento de sistemas plasmônico-quirais para utilização como sensores, propagação de luz e informação molecular
• Beneficiário: Vitor de Moraes Zamarion
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/24725-4 - Química supramolecular e nanotecnologia
• Beneficiário: Henrique Eisi Toma
• Modalidade de apoio: Auxílio à Pesquisa - Temático