title: Experimental evidence for the quantum confinement effect in 3C-SiC nanocrystallites.
abstract: Using electrochemical etching of a polycrystalline 3C-SiC target and subsequent ultrasonic treatment in water solution, we have fabricated suspensions of 3C-SiC nanocrystallites that luminesce. Transmission electron microscope observations show that the 3C-SiC nanocrystallites, which uniformly disperse in water, have sizes in the range of 1-6 nm. Photoluminescence and photoluminescence excitation spectral examinations show clear evidence for the quantum confinement of 3C-SiC nanocrystallites with the emission band maximum ranging from 440 to 560 nm. Tunable, composite polystyrene/SiC film can be made by adding polystyrene to a toluene suspension of the 3C-SiC nanocrystallites and then coating the resulting solution onto a Si wafer.
authors.affiliation: National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: X L
authors.initials: XL
authors.lastname: Wu
authors.forename: J Y
authors.initials: JY
authors.lastname: Fan
authors.forename: T
authors.initials: T
authors.lastname: Qiu
authors.forename: X
authors.initials: X
authors.lastname: Yang
authors.forename: G G
authors.initials: GG
authors.lastname: Siu
authors.forename: Paul K
authors.initials: PK
authors.lastname: Chu