Ultrafast fabrication of thermally stable protein-coated silver iodide nanoparticles for solid-state superionic conductors

Autor(es)

Tofanello, Aryane ^[1] ; Araujo, Juscemacia N. ^[1] ; Nantes-Cardoso, Iseli L. ^[1] ; Ferreira, Fabio F. ^[1] ; Souza, Jose A. ^[1] ; Lim, Dae-Woon ^[2] ; Kitagawa, Hiroshi ^{[2, 3]} ; Garcia, Wanius ^[1]

Afiliação do(s) autor(es)

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

^[2] Kyoto Univ, Grad Sch Sci, Div Chem, Sakyo Ku, Kitashirakawa Oiwakecho, Kyoto - Japan

^[3] Kyushu Univ, INAMORI Frontier Res Ctr, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8193095 - Japan

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES B-BIOINTERFACES; v. 176, p. 47-54, APR 1 2019.
• Citações Web of Science: 0

Resumo

Solid-state ionic conductor is an essential and critical part of electrochemical devices such as batteries and sensors. Nano-sized silver iodide (AgI) is the most promising ionic conductor due to its superionic conductivity at room temperature. In recent years, proteins have been used as organic templates to obtain high-performance solid-state ionic conductors as well as to extend their applications in a biosensor. Here, we report the unprecedented ultrafast synthesis of thermally stable protein-coated AgI nanoparticles (NPs) through the photo irradiation method for solid-state electrolyte. The synthesis was performed using a hyperthermostable bacterial beta-glucosidase. The protein-coated AgI NPs with an approximate diameter of 13 nm showed that the controllable transition from the alpha- to beta-/gamma-phase was drastically suppressed down to 41 degrees C in the cooling process. After drying, the product represents a thermally stable organic-inorganic hybrid system with superionic conductivity. It is noteworthy that the superionic conductivity (sigma(-) 0.14S/cm at 170 degrees C) of thermally stable protein-coated AgI NPs is maintained during several thermal cycles (25-170 degrees C). To our knowledge, this is the first report showing the diffusion of mobile Ag+ ions on the surface of the AgI NPs through a protein matrix. The facile synthesis method and high performance of the protein-coated AgI NPs may provide a latent application in the mass production of nanobatteries and other technological applications. (AU)

• Processo FAPESP: 17/16976-8 - Caracterização biofísica e bioquímica de duas enzimas bacterianas envolvidas na conversão de ácido ferúlico em vanilina
• Beneficiário: Juscemácia Nascimento Araujo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/17275-3 - Estudos do modo de ação de duas mono-oxigenases líticas de polissacarídeos de inseto (ordem isoptera): estrutura molecular, química bioinorgânica e aplicações biotecnológicas
• Beneficiário: Wanius José Garcia da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular