Yb^3＋ singly doped and Yb^3＋/Al^3＋co-doped high silica glass samples are prepared, and their luminescent properties are investigated. Al^3＋ is considered as a beneficial activator for Yb^3＋-doped glass. However, ...Yb^3＋ singly doped and Yb^3＋/Al^3＋co-doped high silica glass samples are prepared, and their luminescent properties are investigated. Al^3＋ is considered as a beneficial activator for Yb^3＋-doped glass. However, the experimental result shows that the addition of Al^3＋ results in the transformation from Yb^3＋ to Yb^2＋ and the improvement in the photon luminescence of Yb^2＋. These characteristics indicate the role of Al^3＋ in Yb^3＋-dooed glass.展开更多
We report the direct fabrication of a microfluidic chip composed of two high-aspect ratio microfluidic channels with lengths of 3.5 cm and 8 mm in a glass substrate by femtosecond laser micromachining. The fabrication...We report the direct fabrication of a microfluidic chip composed of two high-aspect ratio microfluidic channels with lengths of 3.5 cm and 8 mm in a glass substrate by femtosecond laser micromachining. The fabrication mainly consists of two steps： 1） writing microchannels and microchambers in a porous glass by scanning a tightly focused laser beam; 2） high-temperature annealing of the glass sample to collapse all the nanopores in the glass. Migration of derivatized amino acids is observed in the microfluidic channel by applying electric voltage across the long-migration microchannel.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51272262 and 50911140475)the Ministry of Science and Technology of China(MOST)
文摘Yb^3＋ singly doped and Yb^3＋/Al^3＋co-doped high silica glass samples are prepared, and their luminescent properties are investigated. Al^3＋ is considered as a beneficial activator for Yb^3＋-doped glass. However, the experimental result shows that the addition of Al^3＋ results in the transformation from Yb^3＋ to Yb^2＋ and the improvement in the photon luminescence of Yb^2＋. These characteristics indicate the role of Al^3＋ in Yb^3＋-dooed glass.
基金supported by the National Natural Science Foundation of China(Nos.61275208 and 61108015)the Program of Shanghai Subject Chief Scientist(No.10XD1404600)
文摘We report the direct fabrication of a microfluidic chip composed of two high-aspect ratio microfluidic channels with lengths of 3.5 cm and 8 mm in a glass substrate by femtosecond laser micromachining. The fabrication mainly consists of two steps： 1） writing microchannels and microchambers in a porous glass by scanning a tightly focused laser beam; 2） high-temperature annealing of the glass sample to collapse all the nanopores in the glass. Migration of derivatized amino acids is observed in the microfluidic channel by applying electric voltage across the long-migration microchannel.
