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

Author(s)

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

Affiliation

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

• Document type: Journal article
• Source: Electrochimica Acta; v. 318, p. 931-936, SEP 20 2019.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/17831-6 - Surface Enhanced Raman Spectroscopy Studies on Self-Assembled DNA Origami Scaffolds
• Grantee: Sergio Kogikoski Junior
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 16/14507-8 - Structural and Electrochemical Studies of Nanostructures films based on DNA
• Grantee: Sergio Kogikoski Junior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants