Droplet microfluidics for the highly controlled synthesis of branched gold nanoparticles

Autor(es)

Abalde-Cela, Sara ^{[1, 2]} ; Taladriz-Blanco, Patricia ^{[3, 1, 4]} ; de Oliveira, Marcelo Ganzarolli ^[3] ; Abell, Chris ^[1]

Afiliação do(s) autor(es)

^[1] Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW - England

^[2] Int Iberian Nanotechnol Lab INL, Avda Mestre Jose Veiga, P-4715310 Braga - Portugal

^[3] Univ Estadual Campinas, Inst Chem, CP 6154, BR-13083970 Campinas, SP - Brazil

^[4] TU Braunschweig, Inst Mikrotech IMT, Alte Salzdahlumer Str 203, D-38124 Braunschweig - Germany

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 8, FEB 5 2018.
• Citações Web of Science: 18

Resumo

The synthesis of anisotropic metallic nanoparticles (NPs) has been a field of intense and challenging research in the past decade. In this communication, we report on the reproducible and highly controllable synthesis of monodisperse branched gold nanoparticles in a droplet-based microfluidics platform. The process has been automated by adapting two different bulk synthetic strategies to microdroplets, acting as microreactors, for NP synthesis: a surfactant-free synthesis and a surfactant-assisted synthesis. Microdroplets were generated in two different microfluidic devices designed to accommodate the requirements of both bulk syntheses. The epitaxial growth of AuNSTs inside the microdroplets allowed for a fine control of reagent mixing and local concentrations during particle formation. This is the first time branched gold NPs have been synthesised in a microfluidics platform. The monodispersity of the product was comparable to the synthesis in bulk, proving the potential of this technology for the continuous synthesis of high quality anisotropic NPs with improved reproducibility. (AU)

• Processo FAPESP: 15/01685-2 - Detecção em tempo real de óxido nítrico em microgotas através das técnicas SERS e SAXS
• Beneficiário: Patricia Taladriz Blanco
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 16/02414-5 - Biomateriais absorvíveis e tópicos para a liberação localizada de óxido nítrico
• Beneficiário: Marcelo Ganzarolli de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático