Tailoring nanoparticles of aromatic and dye molecules by excimer laser irradiation

Citation
Y. Tamaki et al., Tailoring nanoparticles of aromatic and dye molecules by excimer laser irradiation, APPL SURF S, 168(1-4), 2000, pp. 85-88
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
APPLIED SURFACE SCIENCE
ISSN journal
0169-4332 → ACNP
Volume
168
Issue
1-4
Year of publication
2000
Pages
85 - 88
Database
ISI
SICI code
0169-4332(200012)168:1-4<85:TNOAAD>2.0.ZU;2-9
Abstract
Nanosecond 351 nm excimer laser irradiation of microcrystalline powders of aromatic hydrocarbons and phthalocyanine (Pc) dyes in water results in conv ersion from opaque suspensions to transparent colloidal solutions. Formatio n of similar to 100 nm-sized particles an successfully confirmed for oxo(ph thalocyaninato)vanadium(IV) (VOPc) by AFM observation. The particles in sol ution are stable, while some Pc colloid solutions show interesting slow UV absorption spectral changes, which is interpreted in terms of phase transit ion. It is discussed that the present laser ablation of solution is regarde d not only as a new nanoparticle formation method but also as a control way of molecular aggregation in nanoparticles. (C) 2000 Elsevier Science B.V. All rights reserved.