A hybrid nanosensor for TNT vapor detection

Authors
Aguilar, Alvaro Díaz; Forzani, Erica S.; Leright, Mathew; Tsow, Francis; Cagan, Avi; Iglesias, Rodrigo Alejandro; Nagahara, Larry A.; Amlani, Islamshah; Tsui, Raymond; Tao, N.J.
Publication Year
2010
Language
English
Format
article
Status
Published version
Description
Real-time detection of trace chemicals, such as explosives, in a complex environment containing various interferents has been a difficult challenge. We describe here a hybrid nanosensor based on the electrochemical reduction of TNT and the interaction of the reduction products with conducting polymer nanojunctions in an ionic liquid. The sensor simultaneously measures the electrochemical current from the reduction of TNT and the conductance change of the polymer nanojunction caused from the reduction product. The hybrid detection mechanism, together with the unique selective preconcentration capability of the ionic liquid, provides a selective, fast, and sensitive detection of TNT. The sensor, in its current form, is capable of detecting parts-per-trillion level TNT in the presence of various interferents within a few minutes.
Fil: Aguilar, Alvaro Díaz. Arizona State University; Estados Unidos
Fil: Forzani, Erica S.. Arizona State University; Estados Unidos
Fil: Leright, Mathew. Arizona State University; Estados Unidos
Fil: Tsow, Francis. Arizona State University; Estados Unidos
Fil: Cagan, Avi. Arizona State University; Estados Unidos
Fil: Iglesias, Rodrigo Alejandro. Arizona State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Nagahara, Larry A.. Motorola Laboratories; Estados Unidos
Fil: Amlani, Islamshah. Motorola Laboratories; Estados Unidos
Fil: Tsui, Raymond. Motorola Laboratories; Estados Unidos
Fil: Tao, N.J.. Arizona State University; Estados Unidos
Subject
CONDUCTING POLYMERS
EXPLOSIVE DETECTION
HYBRID SENSORS
NANOSENSORS
NANOWIRES
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/71657