Top-down approach towards graphene : synthesis and electrochemistry
Graphene is widely recognized for its unique structural, physical and electronic properties that can be exploited for electrochemical applications. However, its potential application as an electrochemical material is currently impeded by the lack of methods to synthesize graphene in relatively high...
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| Format: | Thesis |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/54864 |
| _version_ | 1826113977230295040 |
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| author | Chua, Chun Kiang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Chua, Chun Kiang |
| author_sort | Chua, Chun Kiang |
| collection | NTU |
| description | Graphene is widely recognized for its unique structural, physical and electronic properties that can be exploited for electrochemical applications. However, its potential application as an electrochemical material is currently impeded by the lack of methods to synthesize graphene in relatively high quality and large quantities. Consequently, this project has focused on investigating methods for graphene synthesis via the top-down approach i.e. the oxidation of graphite to graphite oxide followed by reduction to graphene. Analysis of the various oxidation methods revealed permanganate oxidants to be the most efficient. Five established reduction approaches were demonstrated for the first time to be useful for the conversion of graphene oxide to graphene. These reduction methods offer control over the extent of reduction, production of commercially viable graphene, and restoration of the sp2 carbon network of reduced graphene. In addition, graphene oxide was successfully introduced as an electroactive label for the detection of single nucleotide polymorphism, demonstrating its potential application for biosensing. Furthermore, graphene materials were found to enhance the electrochemical detection resolutions for catechol and dopamine compounds in a lab-on-a-chip detection platform. The improved methods and demonstrated applications would serve as a useful platform for future studies on the synthesis and usage of graphene materials. |
| first_indexed | 2024-10-01T03:32:00Z |
| format | Thesis |
| id | ntu-10356/54864 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:32:00Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/548642023-02-28T23:36:51Z Top-down approach towards graphene : synthesis and electrochemistry Chua, Chun Kiang School of Physical and Mathematical Sciences Martin Pumera DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry DRNTU::Science::Chemistry::Physical chemistry::Solid state chemistry Graphene is widely recognized for its unique structural, physical and electronic properties that can be exploited for electrochemical applications. However, its potential application as an electrochemical material is currently impeded by the lack of methods to synthesize graphene in relatively high quality and large quantities. Consequently, this project has focused on investigating methods for graphene synthesis via the top-down approach i.e. the oxidation of graphite to graphite oxide followed by reduction to graphene. Analysis of the various oxidation methods revealed permanganate oxidants to be the most efficient. Five established reduction approaches were demonstrated for the first time to be useful for the conversion of graphene oxide to graphene. These reduction methods offer control over the extent of reduction, production of commercially viable graphene, and restoration of the sp2 carbon network of reduced graphene. In addition, graphene oxide was successfully introduced as an electroactive label for the detection of single nucleotide polymorphism, demonstrating its potential application for biosensing. Furthermore, graphene materials were found to enhance the electrochemical detection resolutions for catechol and dopamine compounds in a lab-on-a-chip detection platform. The improved methods and demonstrated applications would serve as a useful platform for future studies on the synthesis and usage of graphene materials. DOCTOR OF PHILOSOPHY (SPMS) 2013-09-30T08:00:49Z 2013-09-30T08:00:49Z 2013 2013 Thesis Chua, C. K. (2013). Top-down approach towards graphene : synthesis and electrochemistry. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/54864 10.32657/10356/54864 en 358 p. application/pdf |
| spellingShingle | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry DRNTU::Science::Chemistry::Physical chemistry::Solid state chemistry Chua, Chun Kiang Top-down approach towards graphene : synthesis and electrochemistry |
| title | Top-down approach towards graphene : synthesis and electrochemistry |
| title_full | Top-down approach towards graphene : synthesis and electrochemistry |
| title_fullStr | Top-down approach towards graphene : synthesis and electrochemistry |
| title_full_unstemmed | Top-down approach towards graphene : synthesis and electrochemistry |
| title_short | Top-down approach towards graphene : synthesis and electrochemistry |
| title_sort | top down approach towards graphene synthesis and electrochemistry |
| topic | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry DRNTU::Science::Chemistry::Physical chemistry::Solid state chemistry |
| url | https://hdl.handle.net/10356/54864 |
| work_keys_str_mv | AT chuachunkiang topdownapproachtowardsgraphenesynthesisandelectrochemistry |