Tailoring nanoparticles of aromatic and dye molecules by excimer laser irradiation

Yoshiaki Tamaki, Tsuyoshi Asahi, Hiroshi Masuhara

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


Nanosecond 351 nm excimer laser irradiation of microcrystalline powders of aromatic hydrocarbons and phthalocyanine (Pc) dyes in water results in conversion from opaque suspensions to transparent colloidal solutions. Formation of approximately 100 nm-sized particles are successfully confirmed for oxo(phthalocyaninato)vanadium(IV) (VOPc) by AFM observation. The particles in solution are stable, while some Pc colloid solutions show interesting slow UV absorption spectral changes, which is interpreted in terms of phase transition. It is discussed that the present laser ablation of solution is regarded not only as a new nanoparticle formation method but also as a control way of molecular aggregation in nanoparticles.

Original languageEnglish
Pages (from-to)85-88
Number of pages4
JournalApplied Surface Science
Issue number1-4
StatePublished - 15 Dec 2000

Fingerprint Dive into the research topics of 'Tailoring nanoparticles of aromatic and dye molecules by excimer laser irradiation'. Together they form a unique fingerprint.

Cite this