Electron transfer in superlattice films based on self-assembled DNA-Gold nanoparticle

Autor(es)

Kogikoski Jr, Sergio ; Kubota, Lauro T. ^[1]

Afiliação do(s) autor(es)

^[1] Kogikoski Jr, Jr., Sergio, State Univ Campinas UNICAMP, Inst Chem, Dept Analyt Chem, POB 6154, BR-13084974 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 318, p. 931-936, SEP 20 2019.
• Citações Web of Science: 0

Resumo

The use of DNA to assembly metal nanoparticles into specific crystalline lattices is a topic of high interest in the moment. Due to the DNA self-assembly it is possible not only to control the crystal symmetry, but also control the distance between particles, rigidity, dynamics and actuation of these systems. In this way, those nanoparticles superlattices are interesting for a broad range of applications, including plasmonics, catalysis and electronics. Herein, we used DNA to self-assembly 20 nm gold nanoparticles into body centered cubic (bcc) films with two different orientations and studied the contribution of DNA to the conduction using methylene blue as electrochemical probe. Our results showed that methylene blue intercalated into the DNA double helix, and the obtained films presented high k(ET) values, reaching similar to 230 s(-1), moreover we showed that the (110) orientation have a higher kET compared to the (100). It indicates that not only the DNA and the nanoparticle are important for the conduction, but their organization is also crucial to understand and improve the charge conduction. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/17831-6 - Estudos de Espectroscopia Raman Intensificado por Superfície em Estruturas de DNA Origami
• Beneficiário: Sergio Kogikoski Junior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 16/14507-8 - Estudos das Propriedades Estruturais e Eletroquímicas de Filmes Nanoestruturados baseados em DNA
• Beneficiário: Sergio Kogikoski Junior
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático