Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
Bowling Green State University / OhioLINK
2013
|
| Subjects: | |
| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1367339768 |
| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu1367339768 |
|---|---|
| record_format |
oai_dc |
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu13673397682021-08-03T05:22:46Z Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation Sevinç, Papatya C. Chemistry Physical Chemistry Single-molecule electron transfer solar energy conversion bioremediation The present thesis describes the investigation of the factors affecting the electron transfer dynamics in the semiconductor-molecule and metal-molecule interfaces as well as the bacterial heavy-metal reduction on the cell surface of dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1. The investigation of these systems was mainly performed by parabolic-mirror-assisted tip-enhanced near-field topographic-spectroscopic imaging, surface-enhanced Raman spectroscopy, and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy. The influence of the surface states and the electric field on the charge transfer process and the interface properties was studied on TiO2-alizarin complex. It has been demonstrated that once alizarin is introduced to the TiO2 surface, the electronic delocalization occurs at the interface, suggesting the involvement of the surface states in charge transfer coupling. Moreover, it has been shown that the electric field significantly alters the coupling at the interface which is also expected to alter the electron transfer dynamics. Furthermore, the redox reactions at the silver-hemin interface has been probed by the prominent fluctuations of the Raman frequency of a specific vibrational mode, v4, which is a typical marker of the redox state of the iron center in a hemin molecule and suggested that the single-molecule redox reaction dynamics at the interface is primarily driven by thermal fluctuations.Lastly, the experimental data obtained in the investigation of Cr(VI) reduction through the outer membrane heme-proteins, MtrC and OmcA, of the metal-reducing bacterium Shewanella oneidensis MR-1 suggested that the direct microbial Cr(VI) reduction and Fe(II) (hematite)-mediated Cr(VI) reduction mechanisms may coexist and the cooperation of surface proteins, OmcA and MtrC, makes the reduction reaction most efficient. 2013-05-16 English text Bowling Green State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1367339768 http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1367339768 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Chemistry Physical Chemistry Single-molecule electron transfer solar energy conversion bioremediation |
| spellingShingle |
Chemistry Physical Chemistry Single-molecule electron transfer solar energy conversion bioremediation Sevinç, Papatya C. Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| author |
Sevinç, Papatya C. |
| author_facet |
Sevinç, Papatya C. |
| author_sort |
Sevinç, Papatya C. |
| title |
Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| title_short |
Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| title_full |
Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| title_fullStr |
Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| title_full_unstemmed |
Single-Molecule Interfacial Electron Transfer in Solar Energy Conversion and Bioremediation |
| title_sort |
single-molecule interfacial electron transfer in solar energy conversion and bioremediation |
| publisher |
Bowling Green State University / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1367339768 |
| work_keys_str_mv |
AT sevincpapatyac singlemoleculeinterfacialelectrontransferinsolarenergyconversionandbioremediation |
| _version_ |
1719418993767350272 |