This paper reports the growth and spectral assessments of Yb^（3＋） ion doped MgMoO_4（Yb^（3＋）：MgMoO_4） crystal grown by the TSSG method. Polarized spectral properties of Yb^（3＋）：MgMoO_4 crystal, including a...This paper reports the growth and spectral assessments of Yb^（3＋） ion doped MgMoO_4（Yb^（3＋）：MgMoO_4） crystal grown by the TSSG method. Polarized spectral properties of Yb^（3＋）：MgMoO_4 crystal, including absorption and emission cross-sections, absorption FWHM and fluorescence lifetime, have been investigated. The laser performance parameters bmin, Isat and Iminhave also been evaluated. All the investigated results show the Yb^（3＋）-doped MgMoO_4 crystal is expected as a promising candidate for ultrashort pulse and tunable lasers.展开更多
High yield and quality mutli-walled carbon nanotube (MWNT) bundles and carbon nanofibers were synthesized by catalytic decomposition of methane over Co/MgMoO4 catalyst at 1 000 ℃. TEM studies showed that the products...High yield and quality mutli-walled carbon nanotube (MWNT) bundles and carbon nanofibers were synthesized by catalytic decomposition of methane over Co/MgMoO4 catalyst at 1 000 ℃. TEM studies showed that the products were mainly carbon nanofibers without carrier gas and were all MWNT bundles with hydrogen or nitrogen as carrier gas. Thermal gravimetric analyses (TGA) on the raw product indicated that the purity of MWNT was higher than 95wt%. The growth mechanism of carbon nanofibers and MWNTs was also discussed.展开更多
基金supported by the National Natural Science Foundation of China(No.61308085,51102047,51472050 and 11404072)Fund of Key Laboratory of Optoelectronic Materials Chemistry and Physics,Chinese Academy of Sciences(2008DP173016)the Natural Science Foundation of Fujian Province(2017J01746)
文摘This paper reports the growth and spectral assessments of Yb^（3＋） ion doped MgMoO_4（Yb^（3＋）：MgMoO_4） crystal grown by the TSSG method. Polarized spectral properties of Yb^（3＋）：MgMoO_4 crystal, including absorption and emission cross-sections, absorption FWHM and fluorescence lifetime, have been investigated. The laser performance parameters bmin, Isat and Iminhave also been evaluated. All the investigated results show the Yb^（3＋）-doped MgMoO_4 crystal is expected as a promising candidate for ultrashort pulse and tunable lasers.
文摘High yield and quality mutli-walled carbon nanotube (MWNT) bundles and carbon nanofibers were synthesized by catalytic decomposition of methane over Co/MgMoO4 catalyst at 1 000 ℃. TEM studies showed that the products were mainly carbon nanofibers without carrier gas and were all MWNT bundles with hydrogen or nitrogen as carrier gas. Thermal gravimetric analyses (TGA) on the raw product indicated that the purity of MWNT was higher than 95wt%. The growth mechanism of carbon nanofibers and MWNTs was also discussed.
