Abstract
Monoclinic H-type Nb\(_{2}\)O\(_{5}\) powders subjected to Q-switched laser pulses in water were characterized by X-ray/electron diffraction and optical spectroscopy to have a significant optical property change with accompanied transformation into orthorhombic T-, pseudohexagonal TT-type and an amorphous phase. The T-Nb\(_{2}\)O\(_{5}\) nanoparticles were (100), (010), (001) and (\(\overline{2} \)01) faceted and commonly in oriented intergrowth with TT-type or amorphized domains retaining the polymerized block units of the relic H-type. Such multiple-phase nanoparticles were hydrogenated and densified to modify Raman and FTIR bands and to show visible absorptions corresponding to a broad minimum band gap of 2.3–2.8 eV for potential opto-catalytic and electrochromic applications.
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Acknowledgments
We thank B.C. Lin for some early PLA runs and the anonymous referees for their constructive comments. This research was supported by the Center for Nanoscience and Nanotechnology at NSYSU and partly by National Science Council, Taiwan, ROC.
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Liang, JY., Wu, CH., Zheng, Y. et al. Structure and optical property changes of Nb\(_{2}\)O\(_{5}\) particles by Q-switched laser pulses in water. Appl. Phys. A 115, 1429–1438 (2014). https://doi.org/10.1007/s00339-013-8059-7
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DOI: https://doi.org/10.1007/s00339-013-8059-7