Modulation of Electrochemical Properties of Graphene Oxide by Photochemical Reduction Using UV-Light Emitting Diodes

Autor(es)

dos Santos, Pamyla Layene ; Timm, Ronaldo Adriano ; Kubota, Lauro Tatsuo ; Bonacin, Juliano Alves

• Tipo de documento: Artigo Científico
• Fonte: CHEMISTRYSELECT; v. 1, n. 6, p. 1168-1175, MAY 1 2016.
• Citações Web of Science: 4

Resumo

Electrodes that were chemically modified by reduced graphene oxide have properties that dependent on the synergy between the level of restoration of the sp(2) structure and the functional groups. Because of this, the challenge in the chemistry of graphene is how to reach the equilibrium between electrical conductivity and specific interactions between the surface and molecular targets and how to tune it. In this work, a simple and effective method to modulate the electrochemical properties of reduced graphene oxide by photoreduction using UV-light emitting diodes is reported. Moreover, we also succeeded in controlling the percentage of oxygenated groups and electrical conductivity, which reflects directly on the electrochemical behavior. The influence of the reduction extent is explored using photochemically reduced graphene oxide generated as a potential sensor for trace detection of dopamine, proving the efficiency and importance of this tunable reduction approach for device-design development, mainly for the synergistic effect among electrical conductivity, pi-interaction and the amount of oxygenate functional groups. (AU)

• 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
• Processo FAPESP: 12/12773-1 - Desenvolvimento de sensores baseados em grafeno e seus derivados, decorados com nanopartículas de ouro e porfirinas
• Beneficiário: Ronaldo Adriano Timm
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado