𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Photochemistry of semiconductor colloids: Properties of extremely small particles of Cd3P2 and Zn3P2

✍ Scribed by H. Weller; A. Fojtik; A. Henglein

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
288 KB
Volume
117
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Extremely small particles of Zn,P, and Ca,P, were prepared as colloids in aqueous solution and in the sohd state. The onset of absorption and the fluorescence band, which lie in the infrared for the macrocrystalline materials, can he shifted through the whole range of the vlstble by changing the parttcle sue. Fluoresc.ence quantum yields of 15% were obtained. The optical effects are due to the strong perturbations in the clectromc energy levels N a consequence of carrier confinement (Q-type materials) The solid parhcle~ wtuch fluoresce strongly, can be redk~lved wrthout changes in siz Methylnologen quenches the fluorescence and promotes the photoanodtc dissolution. ' Permanent address: Gechoslovak Academy of Scike, J. Heyrow Institute of Physkal Chemisljand Electzochem istry. Ragug t3.ecboslovakia

📜 SIMILAR VOLUMES

Comparison of solid-state and solution s
Comparison of solid-state and solution structures of (R3P)2CdX2, (Et3P)2Cd2X4 and (Bu3P)3Cd2X4 complexes
✍ Janet M. Kessler; Jonathan H. Reeder; Rahel Vac; Constance Yeung; John H. Nelson 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 1011 KB

## Abstract The cadmíum (II) phosphine complexes (Et~3~P)~2~Cd~2~X~4~, (R~3~P)~2~CdX~2~ [R~3~P = Ph~3~,P, Bu~3~P, Et~3~P, 1‐phenyldibenzophosphole (DBP), and 1‐phenyl‐3,4,‐dimethylphosphole (DMPP)] and (Bu~3~P)~3~Cd~2~X~4~ (X = Cl, Br, I) have been prepared and their solution and solid state struct

Flash photolysis of Q-particles of Cd3P2
Flash photolysis of Q-particles of Cd3P2 in aqueous solution
✍ Anton Fojtík; Jaromír Jirkovský 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 241 KB

Colloidal solutions of Q-Cd3P2 of different mean particle size were flashed and the changes in optical absorption recorded. An absorption band at long wavelengths in the visible and near-infrared is attributed to surface-trapped holes. A bleaching band close to the onset of absorption is attributed

Photochemistry of semiconductor colloids
Photochemistry of semiconductor colloids; preparation of CdO and In2O3 sols and some photo-reactions
✍ A. Fojtik; A. Henglein; L. Katsikas; H. Weller 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 310 KB

Colloidal solutions of Cd0 and Inz03 were prepared by reaction of Cd2+ or In '+ ions with NaOH in alcoholic solution, thermal treatment of the hydroxide precipitates, and dissolution of the resulting powders in alcohol or water. Upon illumination of the solutions, the absorptions were blue-shifted w