Polycrystalline samples of La_(2)Zr_(2)O_(7) pyrochlore were irradiated by different energetic heavy ions to investigate the dependence of the vibrational mode variations on the irradiation parameters.
Unique characteristics of transition metal dichalcogenides(TMDCs)such as their tunable band gap and ultra-thin body thickness make them potential candidates for applications in optoelectronic.
Muscovite mica sheets with a thickness of 12m were irradiated by various kinds of swift heavy ions in Heavy Ion Research Facility in Lanzhou(HIRFL).In the irradiation experiment,the fluence was kept in the range of 1&...Muscovite mica sheets with a thickness of 12m were irradiated by various kinds of swift heavy ions in Heavy Ion Research Facility in Lanzhou(HIRFL).In the irradiation experiment,the fluence was kept in the range of 1×10^(10)∼1×10^(12) ions/cm^(2),whereas the electronic stopping power Se was in the range from 5.9 to 31.5 keV/nm.The vibrational modifications in irradiated mica were investigated by Fourier-transform infrared(FTIR)spectroscopy and the morphology of the nano-defects on the surface of mica was analyzed by the atomic force microscopy(AFM)in the tapping mode.The infrared spectrum showed that motions from all atomic types in the muscovite mica structure could be found in modes for all vibrations.The intensity of all observed vibrational modes,including the O-H stretching motion at 3621 cm^(−1),was found to decrease with increasing Se values and ion fluences.It was indicated that formation of the defects and structural modifications take place in muscovite mica as a result of swift heavy ion irradiation.And it was found that more defects were introduced in mica by irradiation with higher ion fluences and higher electronic stopping power Se values.展开更多
文摘Polycrystalline samples of La_(2)Zr_(2)O_(7) pyrochlore were irradiated by different energetic heavy ions to investigate the dependence of the vibrational mode variations on the irradiation parameters.
文摘Unique characteristics of transition metal dichalcogenides(TMDCs)such as their tunable band gap and ultra-thin body thickness make them potential candidates for applications in optoelectronic.
文摘Muscovite mica sheets with a thickness of 12m were irradiated by various kinds of swift heavy ions in Heavy Ion Research Facility in Lanzhou(HIRFL).In the irradiation experiment,the fluence was kept in the range of 1×10^(10)∼1×10^(12) ions/cm^(2),whereas the electronic stopping power Se was in the range from 5.9 to 31.5 keV/nm.The vibrational modifications in irradiated mica were investigated by Fourier-transform infrared(FTIR)spectroscopy and the morphology of the nano-defects on the surface of mica was analyzed by the atomic force microscopy(AFM)in the tapping mode.The infrared spectrum showed that motions from all atomic types in the muscovite mica structure could be found in modes for all vibrations.The intensity of all observed vibrational modes,including the O-H stretching motion at 3621 cm^(−1),was found to decrease with increasing Se values and ion fluences.It was indicated that formation of the defects and structural modifications take place in muscovite mica as a result of swift heavy ion irradiation.And it was found that more defects were introduced in mica by irradiation with higher ion fluences and higher electronic stopping power Se values.
