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- W2488403398 abstract "Manipulation by material properties on the nanoscale level has been led by the development of new methods that provide control over size and morphology of nano-/microstructure. One of such modern methods is an ultrasound treatment through utilization of acoustic cavitation phenomenon. Here, we show the cavitation impact on the silicon surface. We have demonstrated that the cavitation initiated by focusing a high-frequency acoustic wave into liquid nitrogen at a frequency ranging 3–6 MHz resulted in Si surface structurization and deformation at the nanometer scale. This result is confirmed by the XRD and μ-Raman investigation. The detailed characterization of the sonicated samples is presented. Optical, atomic force, and scanning electron microscopy techniques as well as energy dispersive X-ray spectroscopy were used for the investigation of the morphology and chemical compound of structured surface. Ellipsometric measurements demonstrated the formation of the layer with the thicknesses ~700 nm and optical parameters closed to SiO2 compound with an additional top layer of the thicknesses ~15 nm and the refractive index ~1. Based on μ-Raman and surface photovoltage spectroscopy results, we obtained an improvement in the photoelectric properties and a new chemical phase formation on silicon surface exposed to the MHz sonication. Micro-Raman investigation detects an appearance of Ca–O local vibrational mode, and the stretching vibration of SiO4 chains characterized wollastonite form of CaSiO3. A significant rise in value and expansion of the spectral range of the surface photovoltage for silicon structured via the megasonic processing was found. Thus, a possibility of the fabrication of a biocompatible photovoltaic cell on the base of Si/CaSiO3, which integrates the nanostructured silicon with bioactive silicate, using the simple and low-cost method has been demonstrated." @default.
- W2488403398 created "2016-08-23" @default.
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- W2488403398 date "2016-01-01" @default.
- W2488403398 modified "2023-09-27" @default.
- W2488403398 title "Structured Silicon Surface via Cavitation Processing for the Photovoltaic and Biomedical Application" @default.
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- W2488403398 doi "https://doi.org/10.1007/978-3-319-30737-4_24" @default.
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