Abstract
| Language | English |
|---|---|
| Title of host publication | Unknown Host Publication |
| Pages | 437-442 |
| Number of pages | 6 |
| Publication status | Published - 28 Mar 2008 |
| Event | AMORPHOUS AND POLYCRYSTALLINE THIN-FILM SILICON SCIENCE AND TECHNOLOGY-2008 - Duration: 28 Mar 2008 → … |
Publication series
| Name | MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS |
|---|
Conference
| Conference | AMORPHOUS AND POLYCRYSTALLINE THIN-FILM SILICON SCIENCE AND TECHNOLOGY-2008 |
|---|---|
| Period | 28/03/08 → … |
Fingerprint
Cite this
}
Luminescent Colloidal Silicon Nanocrystals Prepared by Nanoseconds Laser Fragmentation and Laser Ablation in Water. / Svrcek, V; Mariotti, D; Hailstone, R; Fujiwara, H; Kondo, M.
Unknown Host Publication. 2008. p. 437-442 (MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Luminescent Colloidal Silicon Nanocrystals Prepared by Nanoseconds Laser Fragmentation and Laser Ablation in Water
AU - Svrcek, V
AU - Mariotti, D
AU - Hailstone, R
AU - Fujiwara, H
AU - Kondo, M
N1 - Symposium on Amorphous and Polycrystalline Thin-Film Silicon Science and Technology held at the 2008 MRS Spring Meeting, San Francisco, CA, MAR 25-28, 2008
PY - 2008/3/28
Y1 - 2008/3/28
N2 - The surface states of silicon nanocrystals (Si-ncs) considerably affect quantum confinement effects and may determinate final nanocrystals properties. Colloidally dispersed Sincs offer larger freedom for surface modification compared to common plasma enhanced chemical vapor deposition or epitaxial synthesis in a solid matrix. The Si-ncs fabrication and elaboration in water by pulsed laser processing is an attractive alternative for controlling and engineering of nanocrystal surface by environmentally compatible way. We report on the possibility of direct silicon surface ablation and Si-ncs fabrication by nanosecond pulsed laser fragmentation of electrochemically etched Si micrograins and by laser ablation of crystalline silicon target immersed in de-ionized water. Two nanosecond pulsed lasers (Nd:YAG, and excimer KrF) are successfully employed to assure fragmentation and ablation in order to produce silicon nanoparticles. Contrary to the fragmentation process, which is more efficient under Nd:YAG irradiation, the laser ablation by both lasers led to the fabrication of fine and room temperature hotoluminescent Si-ncs. The processing that has natural compatibility with the environment and advanced state of fabrication technologies may imply new possibilities and applications.
AB - The surface states of silicon nanocrystals (Si-ncs) considerably affect quantum confinement effects and may determinate final nanocrystals properties. Colloidally dispersed Sincs offer larger freedom for surface modification compared to common plasma enhanced chemical vapor deposition or epitaxial synthesis in a solid matrix. The Si-ncs fabrication and elaboration in water by pulsed laser processing is an attractive alternative for controlling and engineering of nanocrystal surface by environmentally compatible way. We report on the possibility of direct silicon surface ablation and Si-ncs fabrication by nanosecond pulsed laser fragmentation of electrochemically etched Si micrograins and by laser ablation of crystalline silicon target immersed in de-ionized water. Two nanosecond pulsed lasers (Nd:YAG, and excimer KrF) are successfully employed to assure fragmentation and ablation in order to produce silicon nanoparticles. Contrary to the fragmentation process, which is more efficient under Nd:YAG irradiation, the laser ablation by both lasers led to the fabrication of fine and room temperature hotoluminescent Si-ncs. The processing that has natural compatibility with the environment and advanced state of fabrication technologies may imply new possibilities and applications.
M3 - Conference contribution
T3 - MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS
SP - 437
EP - 442
BT - Unknown Host Publication
ER -