Carbon nanotube based (Bio) electronic devices
Novel single-walled carbon nanotube (SWNT) based biosensors and chemical sensors for real-time detection of organophosphate and nitrylphenol compounds, respectively, have been developed. Horizontally aligned SWNTs are assembled to desirable electrodes using AC dielectrophoresis technique. For SWNT b...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2008
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| Online Access: | https://hdl.handle.net/10356/13144 |
| _version_ | 1824455422168268800 |
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| author | Liu, Ning Yi |
| author2 | Zhang Qing |
| author_facet | Zhang Qing Liu, Ning Yi |
| author_sort | Liu, Ning Yi |
| collection | NTU |
| description | Novel single-walled carbon nanotube (SWNT) based biosensors and chemical sensors for real-time detection of organophosphate and nitrylphenol compounds, respectively, have been developed. Horizontally aligned SWNTs are assembled to desirable electrodes using AC dielectrophoresis technique. For SWNT based organophosphate sensors, organophosphorus hydrolase (OPH) immobilized on the SWNTs by non-specific binding triggers enzymatic hydrolysis of organophosphates (OPs), such as paraoxon, consequently causing a detectable change in the conductance of the SWNTs. The conductance change is found to be correlated to the concentration of organophosphate. For nitrylphenol compounds detection, as-prepared CNTFETs were used. The response of the SWNT conductance was also found to be directly proportional to the concentration of nitrylphenol compound in the solution. Our results suggest that the novel biosensors and chemical sensors have great potentials to serve as a simple and reusable platform of sensing organophosphate and nitrophenol on a real-time basis. Fabrication details and detection mechanisms of these SWNT based electronic sensors are also discussed in the report. In addition, we analyzed the current fluctuation for these SWNT devices and found that 1/f noise at low frequency region plays a key role of affecting the CNT channel current. |
| first_indexed | 2025-02-19T03:37:57Z |
| format | Thesis |
| id | ntu-10356/13144 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:37:57Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/131442023-07-04T17:00:23Z Carbon nanotube based (Bio) electronic devices Liu, Ning Yi Zhang Qing School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electronic apparatus and materials DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Novel single-walled carbon nanotube (SWNT) based biosensors and chemical sensors for real-time detection of organophosphate and nitrylphenol compounds, respectively, have been developed. Horizontally aligned SWNTs are assembled to desirable electrodes using AC dielectrophoresis technique. For SWNT based organophosphate sensors, organophosphorus hydrolase (OPH) immobilized on the SWNTs by non-specific binding triggers enzymatic hydrolysis of organophosphates (OPs), such as paraoxon, consequently causing a detectable change in the conductance of the SWNTs. The conductance change is found to be correlated to the concentration of organophosphate. For nitrylphenol compounds detection, as-prepared CNTFETs were used. The response of the SWNT conductance was also found to be directly proportional to the concentration of nitrylphenol compound in the solution. Our results suggest that the novel biosensors and chemical sensors have great potentials to serve as a simple and reusable platform of sensing organophosphate and nitrophenol on a real-time basis. Fabrication details and detection mechanisms of these SWNT based electronic sensors are also discussed in the report. In addition, we analyzed the current fluctuation for these SWNT devices and found that 1/f noise at low frequency region plays a key role of affecting the CNT channel current. MASTER OF ENGINEERING (EEE) 2008-10-20T07:15:58Z 2008-10-20T07:15:58Z 2008 2008 Thesis Liu, N. Y. (2008). Carbon nanotube based (Bio) electronic devices. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/13144 10.32657/10356/13144 en 123 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electronic apparatus and materials DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Liu, Ning Yi Carbon nanotube based (Bio) electronic devices |
| title | Carbon nanotube based (Bio) electronic devices |
| title_full | Carbon nanotube based (Bio) electronic devices |
| title_fullStr | Carbon nanotube based (Bio) electronic devices |
| title_full_unstemmed | Carbon nanotube based (Bio) electronic devices |
| title_short | Carbon nanotube based (Bio) electronic devices |
| title_sort | carbon nanotube based bio electronic devices |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electronic apparatus and materials DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics |
| url | https://hdl.handle.net/10356/13144 |
| work_keys_str_mv | AT liuningyi carbonnanotubebasedbioelectronicdevices |