Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing
The presence of fecal coliform bacteria like Escherichia coli (E. coli) in aquatic environments indicates that the water has been contaminated with the fecal material of human or animals. The risk of health threatening to humans become high when E. coli bacteria are exposed to water, not only causes...
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| Format: | Thesis |
| Language: | English English English |
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2018
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| Online Access: | http://eprints.uthm.edu.my/417/ http://eprints.uthm.edu.my/417/1/24p%20KUSNANTO%20MUKTI%20WIBOWO.pdf http://eprints.uthm.edu.my/417/2/KUSNANTO%20MUKTI%20WIBOWO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/417/3/KUSNANTO%20MUKTI%20WIBOWO%20WATERMARK.pdf |
| _version_ | 1848887187620233216 |
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| author | Wibowo, Kusnanto Mukti |
| author_facet | Wibowo, Kusnanto Mukti |
| author_sort | Wibowo, Kusnanto Mukti |
| building | UTHM Institutional Repository |
| collection | Online Access |
| description | The presence of fecal coliform bacteria like Escherichia coli (E. coli) in aquatic environments indicates that the water has been contaminated with the fecal material of human or animals. The risk of health threatening to humans become high when E. coli bacteria are exposed to water, not only causes diarrhea but also lead to death if not treated immediately. Many existing sensors to detect E. coli bacteria are not portable and expensive, while the conventional methods are time consuming and need the sterile procedure. Therefore, it is important to develop a sensor to detect E. coli rapidly, portable and user friendly. In this work, bacteria sensor based on resistivity was developed using graphene nanostructure as a sensing layer, since carbon material like graphene has been known to have a biocompatibility and excellent electrical property. The E. coli bacteria used in this experiment were collected from domestic wastewater and commercial of E. coli strain no. ATCCC 25922. A biochemical test was performed to detect the presence of E. coli in wastewater. The physical characterization of the bacteria was carried out by using FESEM and it was found that the E. coli has size ranging from 1.4-1.6 μm in length. The wettability properties of graphene confirmed that graphene surface is hydrophobic with contact angle of 108.9o which is suitable for bacterial detection. Raman spectroscopy measurements shows that the ratio of G peak and D peak intensity increase due to increase in the number of E. coli. Moreover, the electrical property of graphene shows increasing the number of the bacteria from 4 to 273 colony forming-unit (cfu) result decreasing the resistance from 4.371 to 3.903 ohm gradually. Finally, the sensor was successfully designed using SolidWorks and fabricated by integrating graphene film as a sensing layer with Arduino micro-controller. The validation of the sensor was performed by comparing the data obtained by sensor device and plate culture and has been found to have an error rate of ±12.3%. |
| first_indexed | 2025-11-15T19:50:24Z |
| format | Thesis |
| id | uthm-417 |
| institution | Universiti Tun Hussein Onn Malaysia |
| institution_category | Local University |
| language | English English English |
| last_indexed | 2025-11-15T19:50:24Z |
| publishDate | 2018 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | uthm-4172021-07-25T02:47:45Z http://eprints.uthm.edu.my/417/ Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing Wibowo, Kusnanto Mukti T173.2-174.5 Technological change The presence of fecal coliform bacteria like Escherichia coli (E. coli) in aquatic environments indicates that the water has been contaminated with the fecal material of human or animals. The risk of health threatening to humans become high when E. coli bacteria are exposed to water, not only causes diarrhea but also lead to death if not treated immediately. Many existing sensors to detect E. coli bacteria are not portable and expensive, while the conventional methods are time consuming and need the sterile procedure. Therefore, it is important to develop a sensor to detect E. coli rapidly, portable and user friendly. In this work, bacteria sensor based on resistivity was developed using graphene nanostructure as a sensing layer, since carbon material like graphene has been known to have a biocompatibility and excellent electrical property. The E. coli bacteria used in this experiment were collected from domestic wastewater and commercial of E. coli strain no. ATCCC 25922. A biochemical test was performed to detect the presence of E. coli in wastewater. The physical characterization of the bacteria was carried out by using FESEM and it was found that the E. coli has size ranging from 1.4-1.6 μm in length. The wettability properties of graphene confirmed that graphene surface is hydrophobic with contact angle of 108.9o which is suitable for bacterial detection. Raman spectroscopy measurements shows that the ratio of G peak and D peak intensity increase due to increase in the number of E. coli. Moreover, the electrical property of graphene shows increasing the number of the bacteria from 4 to 273 colony forming-unit (cfu) result decreasing the resistance from 4.371 to 3.903 ohm gradually. Finally, the sensor was successfully designed using SolidWorks and fabricated by integrating graphene film as a sensing layer with Arduino micro-controller. The validation of the sensor was performed by comparing the data obtained by sensor device and plate culture and has been found to have an error rate of ±12.3%. 2018-09 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/417/1/24p%20KUSNANTO%20MUKTI%20WIBOWO.pdf text en http://eprints.uthm.edu.my/417/2/KUSNANTO%20MUKTI%20WIBOWO%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/417/3/KUSNANTO%20MUKTI%20WIBOWO%20WATERMARK.pdf Wibowo, Kusnanto Mukti (2018) Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing. Masters thesis, Universiti Tun Hussein Onn Malaysia. |
| spellingShingle | T173.2-174.5 Technological change Wibowo, Kusnanto Mukti Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title | Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title_full | Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title_fullStr | Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title_full_unstemmed | Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title_short | Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| title_sort | fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing |
| topic | T173.2-174.5 Technological change |
| url | http://eprints.uthm.edu.my/417/ http://eprints.uthm.edu.my/417/1/24p%20KUSNANTO%20MUKTI%20WIBOWO.pdf http://eprints.uthm.edu.my/417/2/KUSNANTO%20MUKTI%20WIBOWO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/417/3/KUSNANTO%20MUKTI%20WIBOWO%20WATERMARK.pdf |