Electronic transport in organic memories of chitosan with gold nanoparticles

Author(s)

Valencia, German Ayala ^[1] ; Rodriguez Llanos, Jaiber Humberto ^[1] ; de Oliveira Vercik, Luci Cristina ^[1] ; Vercik, Andres ^[1]

Affiliation

^[1] Univ Sao Paulo, Basic Sci Dept ZAB FZEA, BR-13635000 Pirassununga, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF POLYMER ENGINEERING; v. 34, n. 2, p. 105-111, APR 2014.
• Web of Science Citations: 1

Abstract

The effect of gold nanoparticles (AuNPs) on the electronic transport in chitosan and chitosan/AuNPs films was experimentally and theoretically studied. The electronic properties (current-voltage curves) relative to the transport in the organic bulk in films were fitted to various models: space-charge limited current (SCLC), trapcharge limited current (TCLC) and scaling rule. However, it was found that the TCLC model, I-TCLC(V)alpha V1+ 1 and scaling rule, I(V)alpha(V-V-T)sic, describes better the electronic transport in chitosan and chitosan/AuNPs films. Current-voltage (I-V) curves showed an increasing conductivity with the AuNPs concentration. In addition, a bistable behavior was observed in chitosan/AuNPs films and it was attributed to the electron capture in the AuNPs. The results reported in this paper indicate that the electronic conductivity and bistable behavior in chitosan/AuNPs films could be controlled by the AuNPs incorporation on the chitosan matrix. (AU)

• FAPESP's process: 10/50424-3 - Development and characterization of nanostructured films for conductimetric hydrogen peroxide biosensors
• Grantee: Andrés Vercik
• Support Opportunities: Regular Research Grants