The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A series of Zn2+ and Eu3+ co-doped TiO2 catalysts were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy(TEM) and ultraviolet-visible diffuse reflection spectroscopy(UV-vis DRS). Characteristic results clearly show that all of Zn2+ and Eu3+ co-doped TiO2 samples exclusively consist of primary anatase crystallites,...
CdTe/Cd1-xMnxS core-shell structure nanoparticles were successfully synthesized in aqueous solution assisted by microwave irradiation. The photoluminescence spectra showed that incorporating low level Mn2+ in outer inorganic shell will not quench the photoemission of quantum dots. The doped nanocrystals exhibited high photoluminescence quantum yield (PLQY), reaching 52% in water under optimum condition.
Optical fiber preforms were solution doped with lanthanide-containing nanoparticles. The nanoparticles spatially localize the doping yielding multiply-doped glasses that did not show energy transfer. This approach opens doors to novel broadband amplifiers and lasers.
Yb-doped silica nanoparticles were fabricated in a MCVD process. Their compositions and doping levels were well controlled. The nanoparticles are of about 21.3 ± 4.6 nm in size, and exhibit the Yb3+-absorption in NIR and several photodarkening bands in UV-Vis. The photodarkening strongly depends on the compositions.
Perspectives of application as phosphors of nanometer size particles doped with transition metal (TM) or rare earth (RE) ions are discussed. It is demonstrated that nanometer size can be crucial to overcome some limitations in achieving high light output. First of all, small size of host materials helps to enhance rate of host-to-impurity energy transfer, opening new efficient channels for TM or RE...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.