Tailoring of electron diffusion through TiO2 nanowires
Charge transport through a random network of onedimensional TiO2 nanostructures such as nanorods, nanowires, and nanofibers developed by electrospinning technique has been studied in the presence of an electrolyte by electrochemical impedance spectroscopy and transient photocurrent measurements. The...
| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Language: | English |
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AIP Publishing LLC.
2012
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/26736/ http://umpir.ump.edu.my/id/eprint/26736/1/Tailoring%20of%20electron%20diffusion%20through%20TiO2%20nanowires.pdf |
| _version_ | 1848822609727193088 |
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| author | Rajan, Jose M. M., Yusoff |
| author_facet | Rajan, Jose M. M., Yusoff |
| author_sort | Rajan, Jose |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Charge transport through a random network of onedimensional TiO2 nanostructures such as nanorods, nanowires, and nanofibers developed by electrospinning technique has been studied in the presence of an electrolyte by electrochemical impedance spectroscopy and transient photocurrent measurements. The results have been compared with the charge transport parameters of random TiO2 nanoparticle (25 nm) network. The charge transport was discussed under the framework of hopping transport. Continuous nanofibers had longer charge collecting times and short nanorods have enhanced scattering losses. The TiO2 films containing random network of nanowires of aspect ratio 10:1 can have an order of magnitude higher diffusion coefficient than other morphologies. Furthermore, charge transport through Nb-doped anatase TiO2 nanofibers was studied. It was observed that the Fermi level of TiO2 rise close to its conduction band and result in a band-edge type diffusion mechanism even at low bias voltages when 2 wt% Nb atoms replaces the Ti atoms in the anatase lattice. The Nb-doped anatase electrospun nanofibers showed high chemical capacitance, high effective diffusion coefficient, and lower transport resistance compared to the undoped samples and conventional nanoparticles. |
| first_indexed | 2025-11-15T02:43:58Z |
| format | Conference or Workshop Item |
| id | ump-26736 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:43:58Z |
| publishDate | 2012 |
| publisher | AIP Publishing LLC. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-267362020-02-13T07:05:08Z http://umpir.ump.edu.my/id/eprint/26736/ Tailoring of electron diffusion through TiO2 nanowires Rajan, Jose M. M., Yusoff Q Science (General) Charge transport through a random network of onedimensional TiO2 nanostructures such as nanorods, nanowires, and nanofibers developed by electrospinning technique has been studied in the presence of an electrolyte by electrochemical impedance spectroscopy and transient photocurrent measurements. The results have been compared with the charge transport parameters of random TiO2 nanoparticle (25 nm) network. The charge transport was discussed under the framework of hopping transport. Continuous nanofibers had longer charge collecting times and short nanorods have enhanced scattering losses. The TiO2 films containing random network of nanowires of aspect ratio 10:1 can have an order of magnitude higher diffusion coefficient than other morphologies. Furthermore, charge transport through Nb-doped anatase TiO2 nanofibers was studied. It was observed that the Fermi level of TiO2 rise close to its conduction band and result in a band-edge type diffusion mechanism even at low bias voltages when 2 wt% Nb atoms replaces the Ti atoms in the anatase lattice. The Nb-doped anatase electrospun nanofibers showed high chemical capacitance, high effective diffusion coefficient, and lower transport resistance compared to the undoped samples and conventional nanoparticles. AIP Publishing LLC. 2012 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26736/1/Tailoring%20of%20electron%20diffusion%20through%20TiO2%20nanowires.pdf Rajan, Jose and M. M., Yusoff (2012) Tailoring of electron diffusion through TiO2 nanowires. In: International Conference on Nanotechnology - Research and Commercialization (ICONT 2011) , 6-9 June 2011 , Sabah. pp. 5-25., 1502 (1). ISSN 0094243X ISBN 978-073541119-7 (Published) https://doi.org/10.1063/1.4769130 |
| spellingShingle | Q Science (General) Rajan, Jose M. M., Yusoff Tailoring of electron diffusion through TiO2 nanowires |
| title | Tailoring of electron diffusion through TiO2 nanowires |
| title_full | Tailoring of electron diffusion through TiO2 nanowires |
| title_fullStr | Tailoring of electron diffusion through TiO2 nanowires |
| title_full_unstemmed | Tailoring of electron diffusion through TiO2 nanowires |
| title_short | Tailoring of electron diffusion through TiO2 nanowires |
| title_sort | tailoring of electron diffusion through tio2 nanowires |
| topic | Q Science (General) |
| url | http://umpir.ump.edu.my/id/eprint/26736/ http://umpir.ump.edu.my/id/eprint/26736/ http://umpir.ump.edu.my/id/eprint/26736/1/Tailoring%20of%20electron%20diffusion%20through%20TiO2%20nanowires.pdf |