Potentiometric detection of chemical species by spin-assisted assembly of vanadium pentoxide nanorods

Autor(es)

Vieira, Nirton C. S. ^[1] ; Avansi, Jr., Waldir ^[2] ; Figueiredo, Alessandra ^[1] ; Mastelaro, Valmor R. ^[3] ; Zucolotto, Valtencir ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Phys Inst Sao Carlos, Nanomed & Nanotoxicol Grp, CP 369, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Phys, UFSCar, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Phys Inst Sao Carlos, Crystal Growth & Ceram Mat, CP 369, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 229, p. 461-465, JUN 28 2016.
• Citações Web of Science: 4

Resumo

Vanadium pentoxide nanorods (V2O5-nanorods) and poly(allylamine hydrochloride) (PAH) were assembled onto gold-coated substrates via spin-assisted assembly technique and used as a chemically sensitive electrodes. PAH/V2O5-nanorods detected H+ ions (pH) with sensitivity between 52-61 mV/pH (close to Nernstian theoretical value). As a proof-of-concept, a urea biosensor has been developed, upon immobilization of urease enzyme on PAH/V2O5-nanorods electrodes. The biosensor could detect urea in a 0.05-5 mM dynamic range. The spin-assisted assembly technique enables the combination of different materials in a simple way and offers advantages for the construction of functional electrodes. (c) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/20110-0 - Imunossensores de efeito de campo para detecção de marcadores do infarto agudo do miocárdio
• Beneficiário: Nirton Cristi Silva Vieira
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado