O433．4 2005020906 禄丰老长菁恐龙化石的XRD和RS分析=Analysis of di- nosaur fossils and fossil formed from Laochangqing Valley Lufeag County by XRD and RS[刊,中]／杨群(云南省楚雄 师院物理与电子科学系.云南,楚雄(675000))...O433．4 2005020906 禄丰老长菁恐龙化石的XRD和RS分析=Analysis of di- nosaur fossils and fossil formed from Laochangqing Valley Lufeag County by XRD and RS[刊,中]／杨群(云南省楚雄 师院物理与电子科学系.云南,楚雄(675000)),王怡林… //光电子·激光.-2004,15(11)．-1365-1368 运用X射线衍射(XRD)、激光显微喇曼光谱(RS)和 光学偏光显微镜等检测方法,研究分析了云南省禄丰县老 长箐地区的5个早、中侏罗纪时期的恐龙化石样品。展开更多
A series of cubic SiC single crystals were heteroepitaxially grown by the hot-wall chemical vapor deposition (CVD) using a HMDS-C3H8-H2 system on 2 inch silicon substrates with the orientations of (100), (111), (110) ...A series of cubic SiC single crystals were heteroepitaxially grown by the hot-wall chemical vapor deposition (CVD) using a HMDS-C3H8-H2 system on 2 inch silicon substrates with the orientations of (100), (111), (110) and (211), respectively. Even though an initial carbonization was carried out to reduce the large lattice mismatch, residual stress could not be completely relieved, partly also due to the difference of their thermal expansion coefficients. Raman scattering studies for the specimens were performed to estimate the internal stress in the SiC epilayer and the substrate. Raman spectra were mapped out on the sample surface as well as on the cross section using an automated x-y stage with a spatial resolution capable of 100 nm. For all the samples, two Raman peaks corresponding to the transverse optical (TO) and longitudinal optical (LO) phonon modes were observed, even though the intensity varied with the polarization configurations. In the SiC epilayers, tensile stresses decrease away from the interface, while compressive stresses exist in the substrate, with the magnitudes dependent on the growth orientation. The lattice strains were discussed in terms of the elastic deformation theory for the comparison.展开更多
0433.54 2003010095激光显微喇曼光谱对恐龙化石的研究=A Raman spectroscopicapproach to the dinosaur fossils from Chuxiong[刊,中]/杨群（楚雄师范学院物理系.云南,楚雄（675000））,王怡林…/光电子·激光.-2002,13（5）.-523...0433.54 2003010095激光显微喇曼光谱对恐龙化石的研究=A Raman spectroscopicapproach to the dinosaur fossils from Chuxiong[刊,中]/杨群（楚雄师范学院物理系.云南,楚雄（675000））,王怡林…/光电子·激光.-2002,13（5）.-523-526分析用激光显微喇曼光谱仪测试的楚雄州不同时期、不同地点的6个恐龙化石样品的喇曼谱,确定了其表面主要成分均为CaCO<sub>3</sub>。实验观察到284cm<sup>-1</sup>(CO<sub>3</sub><sup>2-</sup>的整体振动)谱峰的强度变化可能与年代相联系。实验结果为建立楚雄州恐龙化石喇曼光谱数据库提供了重要资料。图3表3参7（于晓光）展开更多
文摘O433．4 2005020906 禄丰老长菁恐龙化石的XRD和RS分析=Analysis of di- nosaur fossils and fossil formed from Laochangqing Valley Lufeag County by XRD and RS[刊,中]／杨群(云南省楚雄 师院物理与电子科学系.云南,楚雄(675000)),王怡林… //光电子·激光.-2004,15(11)．-1365-1368 运用X射线衍射(XRD)、激光显微喇曼光谱(RS)和 光学偏光显微镜等检测方法,研究分析了云南省禄丰县老 长箐地区的5个早、中侏罗纪时期的恐龙化石样品。
文摘A series of cubic SiC single crystals were heteroepitaxially grown by the hot-wall chemical vapor deposition (CVD) using a HMDS-C3H8-H2 system on 2 inch silicon substrates with the orientations of (100), (111), (110) and (211), respectively. Even though an initial carbonization was carried out to reduce the large lattice mismatch, residual stress could not be completely relieved, partly also due to the difference of their thermal expansion coefficients. Raman scattering studies for the specimens were performed to estimate the internal stress in the SiC epilayer and the substrate. Raman spectra were mapped out on the sample surface as well as on the cross section using an automated x-y stage with a spatial resolution capable of 100 nm. For all the samples, two Raman peaks corresponding to the transverse optical (TO) and longitudinal optical (LO) phonon modes were observed, even though the intensity varied with the polarization configurations. In the SiC epilayers, tensile stresses decrease away from the interface, while compressive stresses exist in the substrate, with the magnitudes dependent on the growth orientation. The lattice strains were discussed in terms of the elastic deformation theory for the comparison.
文摘0433.54 2003010095激光显微喇曼光谱对恐龙化石的研究=A Raman spectroscopicapproach to the dinosaur fossils from Chuxiong[刊,中]/杨群（楚雄师范学院物理系.云南,楚雄（675000））,王怡林…/光电子·激光.-2002,13（5）.-523-526分析用激光显微喇曼光谱仪测试的楚雄州不同时期、不同地点的6个恐龙化石样品的喇曼谱,确定了其表面主要成分均为CaCO<sub>3</sub>。实验观察到284cm<sup>-1</sup>(CO<sub>3</sub><sup>2-</sup>的整体振动)谱峰的强度变化可能与年代相联系。实验结果为建立楚雄州恐龙化石喇曼光谱数据库提供了重要资料。图3表3参7（于晓光）
