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Structural stability of ZnSe nanoribbons was analyzed by means of high-pressure in situ angular dispersive X-ray diffraction (ADXD). The pressure-induced structural transition from the Zinc blende (ZB) to a rocksalt (RS) phase occurs at about 12.6 GPa, and at the transition point the relative volume reduction is close to 13%. By fitting the relative volume-pressure relation to the Birch-Murnaghan equation of states, the bulk modulus B0 for the ZB and RS phases were determined. The values of B0 are 56 GPa (B′0=4) and 116 GPa (B′0=4) for the former and the latter, respectively. According to the measured high-pressure Raman scattering spectra, the TO phonon modes split into two peaks at about 5.5 GPa, and the LO peak gradually disappears above 12.8 GPa due to the semiconductor-metal transition. Using the value of the bulk modulus obtained from the ADXD experiments, the corresponding mode Grüneisen parameters are obtained for the ZB phase.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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