We demonstrate a general approach using novel thiols to functionalize gold nanoparticles for fabricating gas sensors to detect toxic volatile organic compounds (VOCs) in air. Poor selectivity and low sensitivity are common challenges for chemiresistor-based gas sensors. Gold nanoparticle-based gas sensors have the advantage of accommodating thiols for surface modification. The designed thiols with a molecular recognition motif for interaction with target analytes dramatically increase both selectivity and sensitivity of the sensors. The sensors showed a linear response relationship in a broad vapor concentration range from 0.1 ppb to 1000 ppm for various VOCs. A sensor array of the thiol functionalized gold nanoparticles enables analysis of target VOCs.
|Original language||English (US)|
|Title of host publication||TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|State||Published - Jul 26 2017|
|Event||19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017 - Kaohsiung, Taiwan, Province of China|
Duration: Jun 18 2017 → Jun 22 2017
|Name||TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems|
|Other||19th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2017|
|Country/Territory||Taiwan, Province of China|
|Period||6/18/17 → 6/22/17|
Bibliographical noteFunding Information:
We gratefully acknowledge the University of Louisville for support of this research through an Internal Research Grant. BSB was supported by a NSF REU grant, while ACS was supported by a Summer Undergraduate Research Grant from the University of Louisville.
© 2017 IEEE.
- Gas sensors
- gold nanoparticles
- molecular recognition motif
- volatile organic compounds