Light-Tuned DC Conductance of Anatase TiO2 Nanotubular Arrays: Features of Long-Range Charge Transport
Abstract
:1. Introduction
2. Experimental Techniques and Results
2.1. Synthesis and Characterization of Partially Ordered Assemblies of Densely Packed aTNTAs
2.2. Measurements of the Photo-Induced DC Conductance of aTNTA
3. Interpretation of Experimental Results
3.1. Kinetics of DC Conductance Decay in aTNTA
3.2. The Quantum Yield of Photo-Activation and Mobility of Charge Carriers in aTNTA
3.3. Photo-Activated DC Conductance of aTNTA Outside the Fundamental Absorption Band
3.4. A Recurrent Kinetic Model for Photo-Activated Evolution of DC Conductivity of aTNTA
- -
- The photo-induced conductance of the examined aTNTA is proportional to the current population ;
- -
- the time lapse after beginning the photoactivation process is defined as , where is the repetition rate of laser pulses;
- -
- the influence of the population on the photo-ionization efficiency is assumed to be a monotonically decaying function of ; we have assumed a linear decay in described by the following relationship
- -
- the recombination efficiency and the trapping efficiency are assumed to be independent from the population .
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Zimnyakov, D.A.; Vasilkov, M.Y.; Yuvchenko, S.A.; Varezhnikov, A.S.; Sommer, M.; Sysoev, V.V. Light-Tuned DC Conductance of Anatase TiO2 Nanotubular Arrays: Features of Long-Range Charge Transport. Nanomaterials 2018, 8, 915. https://doi.org/10.3390/nano8110915
Zimnyakov DA, Vasilkov MY, Yuvchenko SA, Varezhnikov AS, Sommer M, Sysoev VV. Light-Tuned DC Conductance of Anatase TiO2 Nanotubular Arrays: Features of Long-Range Charge Transport. Nanomaterials. 2018; 8(11):915. https://doi.org/10.3390/nano8110915
Chicago/Turabian StyleZimnyakov, Dmitry A., Michail Yu. Vasilkov, Sergey A. Yuvchenko, Alexey S. Varezhnikov, Martin Sommer, and Victor V. Sysoev. 2018. "Light-Tuned DC Conductance of Anatase TiO2 Nanotubular Arrays: Features of Long-Range Charge Transport" Nanomaterials 8, no. 11: 915. https://doi.org/10.3390/nano8110915