DNA gold nanoparticle nanocomposite films for chemiresistive vapor sensing

Kan Fu; Shihui Li; Xiaoqiang Jiang; Yong Wang; Brian G. Willis

doi:10.1021/la402626p

DNA gold nanoparticle nanocomposite films for chemiresistive vapor sensing

Kan Fu, Shihui Li, Xiaoqiang Jiang, Yong Wang, Brian G. Willis

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Chemiresistive vapor sensors combining functionalized gold nanoparticles and single-stranded DNA oligomers are investigated to enhance specificity in chemical sensing. Sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes using four distinct sequences. Sensor performance is evaluated for response to relative humidity and exposure to vapor analytes including ethanol, methanol, hexane, dimethyl methylphosphonate, and toluene under different relative humidity. It is found that sensors display a nonmonotonic resistance change toward increasing humidity due to the combined effects of hydration induced swelling and ionic conduction. Responses to vapor analytes show sequence-dependent patterns as well as a strong influence of humidity. Overall, the findings are encouraging for using DNA oligomers to enhance specificity in chemical sensing.

Original language	English (US)
Pages (from-to)	14335-14343
Number of pages	9
Journal	Langmuir
Volume	29
Issue number	46
DOIs	https://doi.org/10.1021/la402626p
State	Published - Nov 19 2013

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la402626p

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abstract = "Chemiresistive vapor sensors combining functionalized gold nanoparticles and single-stranded DNA oligomers are investigated to enhance specificity in chemical sensing. Sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes using four distinct sequences. Sensor performance is evaluated for response to relative humidity and exposure to vapor analytes including ethanol, methanol, hexane, dimethyl methylphosphonate, and toluene under different relative humidity. It is found that sensors display a nonmonotonic resistance change toward increasing humidity due to the combined effects of hydration induced swelling and ionic conduction. Responses to vapor analytes show sequence-dependent patterns as well as a strong influence of humidity. Overall, the findings are encouraging for using DNA oligomers to enhance specificity in chemical sensing.",

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T1 - DNA gold nanoparticle nanocomposite films for chemiresistive vapor sensing

AU - Fu, Kan

AU - Li, Shihui

AU - Jiang, Xiaoqiang

AU - Wang, Yong

AU - Willis, Brian G.

PY - 2013/11/19

Y1 - 2013/11/19

N2 - Chemiresistive vapor sensors combining functionalized gold nanoparticles and single-stranded DNA oligomers are investigated to enhance specificity in chemical sensing. Sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes using four distinct sequences. Sensor performance is evaluated for response to relative humidity and exposure to vapor analytes including ethanol, methanol, hexane, dimethyl methylphosphonate, and toluene under different relative humidity. It is found that sensors display a nonmonotonic resistance change toward increasing humidity due to the combined effects of hydration induced swelling and ionic conduction. Responses to vapor analytes show sequence-dependent patterns as well as a strong influence of humidity. Overall, the findings are encouraging for using DNA oligomers to enhance specificity in chemical sensing.

AB - Chemiresistive vapor sensors combining functionalized gold nanoparticles and single-stranded DNA oligomers are investigated to enhance specificity in chemical sensing. Sensors are made by depositing DNA-functionalized gold nanoparticles onto microfabricated electrodes using four distinct sequences. Sensor performance is evaluated for response to relative humidity and exposure to vapor analytes including ethanol, methanol, hexane, dimethyl methylphosphonate, and toluene under different relative humidity. It is found that sensors display a nonmonotonic resistance change toward increasing humidity due to the combined effects of hydration induced swelling and ionic conduction. Responses to vapor analytes show sequence-dependent patterns as well as a strong influence of humidity. Overall, the findings are encouraging for using DNA oligomers to enhance specificity in chemical sensing.

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DNA gold nanoparticle nanocomposite films for chemiresistive vapor sensing

Abstract

All Science Journal Classification (ASJC) codes

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