研究目的
To study the size dependent radiation stability of ZnO and TiO2 particles, specifically comparing nanoscale (30 nm) and submicron particles, and to understand the role of defects in radiation damage.
研究成果
Nanoscale ZnO and TiO2 particles (30 nm) exhibit higher radiation tolerance compared to submicron particles due to abundant native defects and surface/interface states that facilitate in-situ damage recovery through diffusion and annihilation with vacancies. This size-dependent behavior is beneficial for applications in radiative environments like space and nuclear settings.
研究不足
The study is limited to H+ implantation at specific energy and fluence; other types of radiation or conditions are not explored. The critical particle size for radiation stability is not fully determined, and further studies are needed.
1：Experimental Design and Method Selection:
The study compares the radiation tolerance of ZnO and TiO2 particles of different sizes (30 nm and submicron) under H+ implantation. Methods include SEM, TEM, XRD, Raman spectroscopy, and UV-Vis-NIR spectroscopy to analyze structural and optical changes.
2：Sample Selection and Data Sources:
Commercial ZnO and TiO2 particles with sizes of 30 nm, 200 nm, and 300 nm, purity 99.99%, obtained from Aladdin reagent corporation.
3：99%, obtained from Aladdin reagent corporation.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: SEM (ZEISS type), TEM (JEM-2010), XRD (Philips X'pert diffractometer), Raman spectrometer (JY-HR800), spectrophotometer (Lambda 950), H+ implantation equipment.
4：Experimental Procedures and Operational Workflow:
Particles were implanted with H+ ions at 90 keV energy and 5×10^15 cm^-2 fluence in vacuum. Morphology observed via SEM and TEM, structure analyzed via XRD, crystallinity and defects via Raman spectroscopy, optical properties via UV-Vis-NIR spectroscopy and solar absorptance measurement.
5：Data Analysis Methods:
Solar absorptance calculated from reflectance spectra using an integrating sphere and spectral integration. Optical band gap determined from absorption curves. Raman peak intensities and shifts analyzed to assess damage.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
