𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Femtosecond study of the intensity dependence of electron-hole dynamics in TiO2 nanoclusters

✍ Scribed by D. Philip Colombo Jr.; Kirsten A. Roussel; Jamal Saeh; David E. Skinner; Joseph J. Cavaleri; Robert M. Bowman

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
627 KB
Volume
232
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

The dynamics of charge carder trapping and recombination as a function of pump fluence of 20 .~ diameter TiO2 particles in aqueous solutions is measured. Trapping of photogenerated conduction band electrons occurs in less than 500 fs. The subsequent fluence-dependent decay of trapped electrons has both a fast and a slow component. The early time recombination results are interpreted by second-order kinetics. A global fit to the data predicts a bulk second-order recombination rate constant of ( 1.8 _ 0.7) × 10-lO cm 3 s-~ for trapped electrons with holes. The signal at long times is attributed to electrons ejected from the nanocluster and/or deeply trapped electrons produced via third-order kinetics, consistent with an Auger process.

📜 SIMILAR VOLUMES

Femtosecond studies of electron-cation d
Femtosecond studies of electron-cation dynamics in neat water: The effects of isotope substitution
✍ Frederick H. Long; Hong Lu; Kenneth B. Eisenthal 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 425 KB

Femtosecond photoionization studies in neat protio and deuterio water at room temperature have been performed. The rate of appearance of the solvated electron is slower in D,O than in H,O, consistent with the predictions of continuum theories. The observed geminate recombination dynamics of the cati

Interfacial Electron Transfer Dynamics o
Interfacial Electron Transfer Dynamics of Two Newly Synthesized Catecholate Bound RuII Polypyridyl-Based Sensitizers on TiO2 Nanoparticle Surface – A Femtosecond Pump Probe Spectroscopic Study
✍ Tanmay Banerjee; Sachin Rawalekar; Amitava Das; Hirendra N. Ghosh 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 815 KB

## Abstract Two new catecholate‐bound Ru^II^–polypyridine based sensitizers, (2,2′‐bipyridine){ethyl 3‐(4‐hydroxyphenyl)‐2‐[(4′‐methyl‐2,2′‐bipyridinyl‐4‐carbonyl)amino]propionate}{4‐[2‐(4′‐methyl‐2,2′‐bipyridinyl‐4‐yl)vinyl]benzene‐1,2‐diol)}ruthenium(II) hexafluorophosphate (5) and [(2,2′‐bipyrid