Microfluidic-assisted synthesis of uniform polymer-stabilized silver colloids

Autor(es)

Batista, Carin C. S. ^[1] ; Jager, Alessandro ^[2] ; Albuquerque, Brunno L. ^[3] ; Pavlova, Ewa ^[2] ; Stepanek, Petr ^[2] ; Giacomelli, Fernando C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humans, Santo Andre, SP - Brazil

^[2] Czech Acad Sci, Inst Macromol Chem, Prague - Czech Republic

^[3] Univ Fed Rio Grande Do Sul, Inst Chem, Lab Mol Catalysis, Porto Alegre, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS; v. 618, JUN 5 2021.
• Citações Web of Science: 1

Resumo

We report the controlled synthesis of polymer-stabilized silver nanoparticles (AgNPs) by using microfluidic devices. The microfluidic-based method enabled the preparation of sub-50 nm AgNPs which are much more homogenous compared to those produced in batch reactors where the control over flow and mixing conditions was not performed. The concentration of the silver precursor (silver nitrate - AgNO3) can be tuned to reach smaller or larger nanoparticles, although within a fairly narrow range. Regardless of the polymeric shell, the reducing agent concentration influences the size and polydispersity of the manufactured silver colloids, and relatively lower amounts allow for the manufacturing of more homogeneous nanoparticles. Notably, the use of the block copolymer PEO-b-P2VP as stabilizing agent leads to larger nanoparticles (23?51 nm) compared to those stabilized by PVP (7?14 nm) as possibly linked to different arrangements of the polymer chains at the interface between the precursor solutions. The produced AgNPs are highly uniform, with size distribution width influenced by the polymer concentration (FWHM < 100 nm were determined at higher concentrations), although this variable does not have a distinguished effect on the final size of the manufactured colloids. Overall, we provide relevant new knowledge within the framework of polymer-stabilized AgNPs since a variety of other polymer chains can be probed, possibly with different outcomes regarding the final particle size. The reported findings can thus guide to significant advances towards the manufacturing of highly homogeneous polymer-coated metallic colloids, particularly when a target size is required. (AU)

• Processo FAPESP: 19/03223-7 - Microfluídica como ferramenta para o controle do tamanho e polidispersão de nanocoloides de prata e posteriores investigações relacionadas à formação de coroas proteicas
• Beneficiário: Carin Cristina da Silva Batista
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 17/24603-7 - Nanobiointerface em coloides metálicos: influência das características superficiais na estrutura da coroa protéica adsorvida sobre nanopartículas de prata e os seus impactos na citotoxicidade e potencial biotecnológico
• Beneficiário: Carin Cristina da Silva Batista
• Modalidade de apoio: Bolsas no Brasil - Doutorado