Grochowska Katarzyna, Haryński Łukasz, Karczewski Jakub, Jurak Kacper, Siuzdak Katarzyna
Centre for Plasma and Laser Engineering, Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14 Street, 80-231 Gdańsk, Poland.
Faculty of Applied Physics and Mathematics, Institute of Nanotechnology and Materials Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland.
Materials (Basel). 2023 Mar 23;16(7):2572. doi: 10.3390/ma16072572.
This work presents pulsed UV laser treatment (355 nm, 2 Hz) of TiO nanotubes decorated with chromium oxides. The modification was performed in a system equipped with a beam homogenizer, and during the irradiation, the samples were mounted onto the moving motorized table. In such a system, both precisely selected areas and any large area of the sample can be modified. Photoelectrochemical tests revealed photoresponse of laser-treated samples up to 1.37- and 18-fold under the illumination with ultraviolet-visible and visible light, respectively, in comparison to bare titania. Optimal beam energy fluence regarding sample photoresponse has been established. Scanning electron microscopy images, X-ray diffraction patterns, along with Raman and X-ray photoelectron spectra, suggest that the enhanced photoresponse results from changes solely induced in the layer of chromium oxides. It is believed that the results of the present work will contribute to a wider interest in laser modification of semiconductors exhibiting improved photoelectrochemical activity.
本文介绍了用脉冲紫外激光（355纳米，2赫兹）对装饰有氧化铬的二氧化钛纳米管进行处理。改性是在配备光束均匀器的系统中进行的，在辐照过程中，样品被安装在可移动的电动工作台上。在这样的系统中，可以对精确选择的区域以及样品的任何大面积区域进行改性。光电化学测试表明，与裸露的二氧化钛相比，经激光处理的样品在紫外可见光和可见光照射下的光响应分别提高了1.37倍和18倍。已经确定了关于样品光响应的最佳光束能量通量。扫描电子显微镜图像、X射线衍射图谱以及拉曼光谱和X射线光电子能谱表明，增强的光响应仅源于氧化铬层中诱导的变化。据信，本工作的结果将促使人们对具有改善的光电化学活性的半导体激光改性产生更广泛的兴趣。
