Erbium, Ytterbium-codoped ZrO 2 nanoparticles(ZrO 2∶Er 3+ ,Yb 3+ ) were prepared by the sol-emulsion-gel technique. The purpose of the present study is the application of upconversion phosphor in the biolog...Erbium, Ytterbium-codoped ZrO 2 nanoparticles(ZrO 2∶Er 3+ ,Yb 3+ ) were prepared by the sol-emulsion-gel technique. The purpose of the present study is the application of upconversion phosphor in the biological label. In order to make out the mechanism of upconversion under 980 nm excitation the 488 nm pump was used. The influence of temperature on the crystallite phase was studied. The results confirm the upconverted mechanism in ZrO 2∶Er 3+ ,Yb 3+ nanocrystals is due to an energy transfer upconversion(ETU).展开更多
Two fluorescent indocyanine dyes containing at least one p-carboxybenzyl group on the nitrogen atoms in the heterocyclic rings were designed and synthesized. Their absorption maxima were 549 nm and 551 nm in water re...Two fluorescent indocyanine dyes containing at least one p-carboxybenzyl group on the nitrogen atoms in the heterocyclic rings were designed and synthesized. Their absorption maxima were 549 nm and 551 nm in water respectively. They had good water solubility and photostability.展开更多
The green fluorescent protein (GFP) from jellyfishAequorea victoria has unique superiority as a kind of biological label. GFP has been widely used in all fields of biology based on the recent studies on its structure,...The green fluorescent protein (GFP) from jellyfishAequorea victoria has unique superiority as a kind of biological label. GFP has been widely used in all fields of biology based on the recent studies on its structure, characteristic and mechanism of bioluninescence.展开更多
基金the National Natural Science Foundation of China(No.2 0 0 730 16 and 6 0 2 710 2 0 ) ,state 86 3Projects(No.2 0 0 2 AA 30 2 2 0 3) and state 973Projects(No.G19990 6 4 5 0 4 )
文摘Erbium, Ytterbium-codoped ZrO 2 nanoparticles(ZrO 2∶Er 3+ ,Yb 3+ ) were prepared by the sol-emulsion-gel technique. The purpose of the present study is the application of upconversion phosphor in the biological label. In order to make out the mechanism of upconversion under 980 nm excitation the 488 nm pump was used. The influence of temperature on the crystallite phase was studied. The results confirm the upconverted mechanism in ZrO 2∶Er 3+ ,Yb 3+ nanocrystals is due to an energy transfer upconversion(ETU).
基金the National Natural Science Foundation of China and The Ministry of Education of China for providing financial support for this project.
文摘Two fluorescent indocyanine dyes containing at least one p-carboxybenzyl group on the nitrogen atoms in the heterocyclic rings were designed and synthesized. Their absorption maxima were 549 nm and 551 nm in water respectively. They had good water solubility and photostability.
文摘The green fluorescent protein (GFP) from jellyfishAequorea victoria has unique superiority as a kind of biological label. GFP has been widely used in all fields of biology based on the recent studies on its structure, characteristic and mechanism of bioluninescence.
