Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes
The use of surfactants is ubiquitous in the production of graphene and its analogs as well as their stabilization in solution due to their hydrophobicity causing significant aggregation in aqueous media. Several redox probes ([Fe(CN)6]4−/3−, [Ru(NH3)6]2+/3+, Feaq2+/3+) were employed to assess the ef...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96127 http://hdl.handle.net/10220/10847 |
| _version_ | 1824453621964603392 |
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| author | Wong, Colin Hong An Pumera, Martin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wong, Colin Hong An Pumera, Martin |
| author_sort | Wong, Colin Hong An |
| collection | NTU |
| description | The use of surfactants is ubiquitous in the production of graphene and its analogs as well as their stabilization in solution due to their hydrophobicity causing significant aggregation in aqueous media. Several redox probes ([Fe(CN)6]4−/3−, [Ru(NH3)6]2+/3+, Feaq2+/3+) were employed to assess the effect of various surfactants on the electrochemical responses of glassy carbon (GC) as well as thermally reduced graphene oxide (TRGO) modified GC electrodes. Anionic (sodium cholate, sodium dodecyl sulfate) as well as cationic (cetrimonium bromide) surfactants were used in this investigation. The presence of these surfactants was shown to have varying influences on peak-to-peak separation (ΔE) and faster/slower observed heterogeneous electron transfer (HET) values depending on the nature of the probe as well as type of surfactant. Careful consideration of control experiments is recommended to aid in determining a material's electrochemical performance. |
| first_indexed | 2025-02-19T03:09:20Z |
| format | Journal Article |
| id | ntu-10356/96127 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:09:20Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/961272020-03-07T12:37:06Z Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes Wong, Colin Hong An Pumera, Martin School of Physical and Mathematical Sciences The use of surfactants is ubiquitous in the production of graphene and its analogs as well as their stabilization in solution due to their hydrophobicity causing significant aggregation in aqueous media. Several redox probes ([Fe(CN)6]4−/3−, [Ru(NH3)6]2+/3+, Feaq2+/3+) were employed to assess the effect of various surfactants on the electrochemical responses of glassy carbon (GC) as well as thermally reduced graphene oxide (TRGO) modified GC electrodes. Anionic (sodium cholate, sodium dodecyl sulfate) as well as cationic (cetrimonium bromide) surfactants were used in this investigation. The presence of these surfactants was shown to have varying influences on peak-to-peak separation (ΔE) and faster/slower observed heterogeneous electron transfer (HET) values depending on the nature of the probe as well as type of surfactant. Careful consideration of control experiments is recommended to aid in determining a material's electrochemical performance. 2013-07-01T04:47:03Z 2019-12-06T19:26:08Z 2013-07-01T04:47:03Z 2019-12-06T19:26:08Z 2012 2012 Journal Article Wong, C. H. A., & Pumera, M. (2012). Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes. Electrochemistry Communications, 22, 105-108. 1388-2481 https://hdl.handle.net/10356/96127 http://hdl.handle.net/10220/10847 10.1016/j.elecom.2012.06.007 en Electrochemistry communications © 2012 Elsevier B.V. |
| spellingShingle | Wong, Colin Hong An Pumera, Martin Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title | Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title_full | Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title_fullStr | Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title_full_unstemmed | Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title_short | Surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| title_sort | surfactants show both large positive and negative effects on observed electron transfer rates at thermally reduced graphenes |
| url | https://hdl.handle.net/10356/96127 http://hdl.handle.net/10220/10847 |
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