Nano-Sized Silver Colloids Produced and Stabilized by Amino-Functionalized Polymers: Polymer Structure-Nanoparticle Features and Polymer Structure-Growth Kinetics Relationships

Autor(es)

Batista, Carin C. S. ; Albuquerque, Lindomar J. C. ; Ribeiro, Caroline A. S. ; de Castro, Carlos E. ; Miranda, Erica G. A. ; Nantes, Iseli L. ; Albuquerque, Brunno L. ; Cardoso, Mateus B. ; Giacomelli, Fernando C.

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 28, n. 9, p. 11-pg., 2017-09-01.

Resumo

The synthesis of highly stable silver colloids has been successfully achieved by using reducing/stabilizer amino-functionalized polymers without the aid of any other external agent. The polymer coated inorganic nanoparticles have been detailed characterized via scattering, imaging and UV-Vis spectroscopy. The combination of transmission electron microscopy (TEM) and light scattering suggested nearly spherical structures stabilized by a lengthy polymeric shell with surface charge dependent on polymer nature and molecular weight. The hybrid nanomaterials are produced via an autocatalytic process where the onset of colloid formation is influenced by the available hydrophobic nitrogen units normalized by the weight of polymer. The induction period, however, does not influence the dimension of the metallic cores which are similar although with a high degree of dispersity. The coating confers a large hydrodynamic size to the silver nanoparticles and the length of the stabilizing shell is chiefly governed by the molecular weight of the amino-functionalized polymers. These features may significantly impact the cytotoxicity and bactericidal properties of the hybrid materials. These investigations are currently underway. (AU)

• Processo FAPESP: 15/24686-4 - Investigação de efeitos de superfície e presença de coroa protéica no processo de internalização celular de sistemas poliméricos nanoestruturados
• Beneficiário: Carlos Eduardo de Castro
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/22983-9 - Produção de sistemas supramoleculares nanoestruturados a partir de DNA e copolímeros em bloco catiônicos com potencial aplicação em terapia genética
• Beneficiário: Fernando Carlos Giacomelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/22322-2 - Funcionalização de nanopartículas de sílica: aumentando a interação biológica
• Beneficiário: Mateus Borba Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Regular