Detection of triacetone triperoxide (TATP) with an array of sensors based on non-specific interactions

Eyal Capua, Roberto Cao, Chaim N. Sukenik, Ron Naaman

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

An array of hybrid organic-semiconductor sensors was developed aimed at selectively detecting triacetone triperoxide (TATP). Each element of the array is a field effect-like transistor based on GaAs. The gate in these devices has been replaced by a self-assembled monolayer of receptor molecules. The current layout features selectivity to TATP and is able to detect less than 100 ppb. A correlation among the responses, the chain length of the grafted molecules, and the surface potential is exhibited, suggesting that the sensing mechanism involves charge transfer between the adsorbed molecules and the substrate.

Original languageEnglish
Pages (from-to)122-127
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume140
Issue number1
DOIs
StatePublished - 18 Jun 2009

Bibliographical note

Funding Information:
We acknowledge the support from the Grand Center for Sensors and Security at the Weizmann Institute.

Funding

We acknowledge the support from the Grand Center for Sensors and Security at the Weizmann Institute.

FundersFunder number
Grand Center for Sensors and Security
Weizmann Institute

    Keywords

    • Charge transfer
    • Electronic nose
    • Explosives
    • Sensor

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