Untitled

Morphology controls of GeO2 particles precipitated by a facile acid-induced decomposition of germanate ions in aqueous medium

“…Submicron or nano-particles often have novel physical and chemical properties, differing from those of the corresponding bulk materials [1][2][3][4][5]. For example, Submicron or nanometer-sized semiconductors have electronic and optical properties that depend on the particle size, making them potential candidates for applications, where tunability of these properties is essential [6][7][8].…”

“…The wet chemical process has been widely used to synthesize oxide particles, because the shapes and morphologies of the particles can be easily controlled by using a low-temperature growth process [3][4][5]. Germanium alkoxides or halides are the precursors generally used to synthesize GeO 2 materials through wet chemical process [12,[14][15][16][17][18][19][20].…”

Preparation and optical properties of HoF3–BaF2–AlF3–GeO2 glasses

“…For example, transparent materials containing Eu 3+ or Tb 3+ have been examined from a point of view of the fluorescence at the visible region [1][2][3] and Er 3+ has been investigated as a dopant for an optical fiber amplifier at 1.5 lm [4,5]. Nd 3+ and Yb 3+ are well known as ionic species for laser oscillators [6][7][8][9][10][11]. In any cases, it is interesting to investigate the host material in which a large amount of LnF 3 exists uniformly.…”

Facile Synthesis and Enhanced Near Infrared Luminescent Properties of CaWO<SUB>4</SUB>:Ln<SUP>3+</SUP>/Na<SUP>+</SUP> (Ln = Nd, Er, and Yb) Core/Shell Microstructure

“…As indicated in Figure 3 higher excited states including 4 D 1/2 + 4 D 3/2 , 2 P 1/2 + 2 D 5/2 , 2 K 15/2 + 2 D 3/2 + 2 G 9/2 , 2 K 13/2 + 4 G 9/2 + 4 G 7/2 , 4 F 9/2 4 S 3/2 + 4 F 7/2 , 2 H 9/2 + 4 F 5/2 according to previous literatures. 24 25 No broad band excitation belonging to the charge transfer transitions of WO 2− 4 was observed. 26 Figure 3(b) shows the room temperature emission spectrum of CaWO 4 :Na + /Nd 3+ microspheres under excitation at 683 nm.…”