Surface Modification of Silicon Nanocrystallites by Alcohols

• Published in: The journal of physical chemistry. B Vol. 103; no. 44; pp. 9524 - 9529
• Main Authors: Sweryda-Krawiec, Beata, Cassagneau, Thierry, Fendler, Janos H
• Format: Journal Article
• Language: English
• Published: American Chemical Society 04.11.1999
• ISSN: 1520-6106; 1520-5207
• DOI: 10.1021/jp992298p

Room-temperature addition of 1-undecanol (UD-OH), 1-hexadecanol (HD-OH), 1-octanol (OC-OH), and 1,12-dodecanediol DD-(OH)2 completely quenched the photoluminescence of silicon nanocrystallites, Si-nc. Heating Si-nc with UD-OH, HD-OH, and OC−OH resulted in the partial recovery of the photoluminescence and in the formation of 1−10 nm diameter alcohol capped Si-nc:  Si-nc-O-UD, Si-nc-O-HD, and Si-nc-O-OC. Heating Si-nc with DD-(OH)2 also restored partially the photoluminescence and TEM and AFM images indicated the formation of diol interconnected, 100−800 nm diameter silicon nanoparticle agglomerates, Si-nc-O-DD-O-nc-Si.