Self-Assembly of Monolayers of Semiconductor Nanocrystallites

作者：Rosalba Rizza, Donald J. Fitzmaurice, Sean Hearne, Greg Hughes, Giuseppe Spoto, Enrico Ciliberto, Harald R. Kerp, Ruud E. I. Schropp · 发表于：Chemistry of Materials · 年份：1997 · DOI：10.1021/cm970349u · 被引用次数：58 · 研究领域：Quantum Dots Synthesis And Properties、Gold and Silver Nanoparticles Synthesis and Applications、Nanocluster Synthesis and Applications

Described is the self-assembly of a monolayer of TiO 2 nanocrystallites on a gold substrate by two related methods. In the first of these methods, a crystalline monolayer of the functionalized thiol HS−(CH 2 ) 10 −COOH is self-assembled at an annealed gold substrate by adsorption from ethanolic solution. The modified gold substrate is then immersed in an ethanolic TiO 2 colloid. TiO 2 nanocrystallites are adsorbed at the terminal −COOH group of the molecules constituting the monolayer. In the second of these methods, an ethanolic colloid of TiO 2 nanocrystallites is prepared in the presence of the functionalized thiol HS−(CH 2 ) 10 −COOH. The modified nanocrystallites are adsorbed at the surface of an annealed gold substrate. For each method, there is some evidence for short-range ordering of the nanocrystallites constituting the close-packed monolayer adsorbed at the gold substrate. Some potential applications of these methods are considered.