TY - GEN
T1 - Polynucleotide-functionalized gold nanoparticles as chemiresistive vapor sensing elements
AU - Fu, Kan
AU - Pedrick, Wyatt
AU - Wang, Han
AU - Lamarche, Andrew
AU - Jiang, Xiaoqiang
AU - Willis, Brian G.
AU - Li, Shihui
AU - Wang, Yong
PY - 2013
Y1 - 2013
N2 - Chemiresistive vapor sensors combining sensing capabilities of functionalized gold nanoparticles and DNA have been investigated. The sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes and subsequent drying to obtain a nanocomposite film. Comparisons are made between DNA-AuNP sensors and alkanethiol-AuNP sensors, revealing both similarities and differences. The sensors behave like alkanethiol-AuNP sensors in areas of sensitivity, reversibility, and response patterns. However, DNA-AuNP sensors are different in several ways. At high analyte vapor concentrations, the sensors response pattern towards water vapor is distinctively different from those towards organic vapors. At low analyte vapor conentrations with fixed relative humidity, a dual mechanism leads to peak response at intermediate humidity. In addition, the sensors reveal length-dependent and sequence dependent response patterns which facilitate distinguishability of vapor analytes. With this concept, vapor identification capabilities of nanoparticulate chemiresistive sensors can be further enhanced.
AB - Chemiresistive vapor sensors combining sensing capabilities of functionalized gold nanoparticles and DNA have been investigated. The sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes and subsequent drying to obtain a nanocomposite film. Comparisons are made between DNA-AuNP sensors and alkanethiol-AuNP sensors, revealing both similarities and differences. The sensors behave like alkanethiol-AuNP sensors in areas of sensitivity, reversibility, and response patterns. However, DNA-AuNP sensors are different in several ways. At high analyte vapor concentrations, the sensors response pattern towards water vapor is distinctively different from those towards organic vapors. At low analyte vapor conentrations with fixed relative humidity, a dual mechanism leads to peak response at intermediate humidity. In addition, the sensors reveal length-dependent and sequence dependent response patterns which facilitate distinguishability of vapor analytes. With this concept, vapor identification capabilities of nanoparticulate chemiresistive sensors can be further enhanced.
UR - http://www.scopus.com/inward/record.url?scp=84893902761&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893902761&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2013.6688518
DO - 10.1109/ICSENS.2013.6688518
M3 - Conference contribution
AN - SCOPUS:84893902761
SN - 9781467346405
T3 - Proceedings of IEEE Sensors
BT - IEEE SENSORS 2013 - Proceedings
PB - IEEE Computer Society
T2 - 12th IEEE SENSORS 2013 Conference
Y2 - 4 November 2013 through 6 November 2013
ER -