Nanometric surface design of size‐quantized semiconductor microcrystals

Semiconductor microcrystals (Q‐particles) with diameters less that 100 Å, modified with viologen have recently been produced. One potential application for such particles would be for light energy conversion devices such as photocatalysts and photosenstizers in wet solar cells. The viologen moieties have the ability to function as electron mediators between the semiconductor particles and acceptors in solution. The preparation and potential applications of these ineresting materials are discussed.