Near-field assisted CO2 reduction
In order to work toward a method for photoreduction of CO2 using the solar spectrum, we have investigated the effects of the optical near-field (ONF) on the absorption of CO2, a very stable molecule with high absorption and dissociation energies, by introducing ZnO nanorods to generate the ONF. The CO2 absorption bands under light with a wavelength longer than the absorption wavelength confirmed the ONF-assisted energy up-conversion. In addition, the specific CO2 modes related to this process are evaluated using vibration-rotation spectra, and it is found that the ONF causes a significant increase in the intensity of certain absorption bands, especially those that require higher energies to activate.
- N. Tanjeem, T. Kawazoe, and T. Yatsui, “CO2 phonon mode renormalization using phonon-assisted energy up-conversion,” Scientific Reports, Vol. 3, Article number: 3341, November 2013, doi:10.1038/srep03341 (8 pages)
- T. Yatsui, Y. Nakahira, Y. Nakamura, T. Morimoto, Y. Kato, M. Yamamoto, T. Yoshida, K. Iida, and K. Nobusada, “Realization of red shift of absorption spectra using optical near-field effect,” Nanotechnology, DOI: https://doi.org/10.1088/1361-6528/ab2092