Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers
Photoacoustic (PA) detection of H<sub>2</sub> and NH<sub>3</sub> using plasmonic excitation in Pt- and Pd-decorated GaN piezotransistive microcantilevers were investigated using pulsed 520-nm laser illumination. The sensing performances of 1-nm Pt and Pd nanoparticle (NP) dep...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/11/7/680 |
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| author | Digangana Khan Hongmei Li Ferhat Bayram Durga Gajula Goutam Koley |
| author_facet | Digangana Khan Hongmei Li Ferhat Bayram Durga Gajula Goutam Koley |
| author_sort | Digangana Khan |
| collection | DOAJ |
| description | Photoacoustic (PA) detection of H<sub>2</sub> and NH<sub>3</sub> using plasmonic excitation in Pt- and Pd-decorated GaN piezotransistive microcantilevers were investigated using pulsed 520-nm laser illumination. The sensing performances of 1-nm Pt and Pd nanoparticle (NP) deposited cantilever devices were compared, of which the Pd-coated sensor devices exhibited consistently better sensing performance, with lower limit of detection and superior signal-to-noise ratio (SNR) values, compared to the Pt-coated devices. Among the two functionalization layers, Pd-coated devices were found to respond only to H<sub>2</sub> exposure and not to NH<sub>3</sub>, while Pt-coated devices exhibited repeatable response to both H<sub>2</sub> and NH<sub>3</sub> exposures, highlighting the potential of the former in performing selective detection between these reducing gases. Optimization of the device-biasing conditions were found to enhance the detection sensitivity of the sensors. |
| first_indexed | 2024-03-10T18:31:05Z |
| format | Article |
| id | doaj.art-ee46c04824c64777b833b7c5cdca2cb9 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T18:31:05Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-ee46c04824c64777b833b7c5cdca2cb92023-11-20T06:36:36ZengMDPI AGMicromachines2072-666X2020-07-0111768010.3390/mi11070680Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN MicrocantileversDigangana Khan0Hongmei Li1Ferhat Bayram2Durga Gajula3Goutam Koley4Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USAHolcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USAHolcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USASchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USAHolcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USAPhotoacoustic (PA) detection of H<sub>2</sub> and NH<sub>3</sub> using plasmonic excitation in Pt- and Pd-decorated GaN piezotransistive microcantilevers were investigated using pulsed 520-nm laser illumination. The sensing performances of 1-nm Pt and Pd nanoparticle (NP) deposited cantilever devices were compared, of which the Pd-coated sensor devices exhibited consistently better sensing performance, with lower limit of detection and superior signal-to-noise ratio (SNR) values, compared to the Pt-coated devices. Among the two functionalization layers, Pd-coated devices were found to respond only to H<sub>2</sub> exposure and not to NH<sub>3</sub>, while Pt-coated devices exhibited repeatable response to both H<sub>2</sub> and NH<sub>3</sub> exposures, highlighting the potential of the former in performing selective detection between these reducing gases. Optimization of the device-biasing conditions were found to enhance the detection sensitivity of the sensors.https://www.mdpi.com/2072-666X/11/7/680photoacousticspiezotransistiveplasmonicsgas sensingPd nanoparticlesPt nanoparticles |
| spellingShingle | Digangana Khan Hongmei Li Ferhat Bayram Durga Gajula Goutam Koley Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers Micromachines photoacoustics piezotransistive plasmonics gas sensing Pd nanoparticles Pt nanoparticles |
| title | Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers |
| title_full | Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers |
| title_fullStr | Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers |
| title_full_unstemmed | Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers |
| title_short | Photoacoustic Detection of H<sub>2</sub> and NH<sub>3</sub> Using Plasmonic Signal Enhancement in GaN Microcantilevers |
| title_sort | photoacoustic detection of h sub 2 sub and nh sub 3 sub using plasmonic signal enhancement in gan microcantilevers |
| topic | photoacoustics piezotransistive plasmonics gas sensing Pd nanoparticles Pt nanoparticles |
| url | https://www.mdpi.com/2072-666X/11/7/680 |
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