Open AccessImprovement of UV emission from highly crystalline ZnO nanoparticles by pulsed laser ablation under O2/He glow discharge
Author(s) -
Qiang Ma,
Teguh Endah Saraswati,
Akihisa Ogino,
Masaaki Nagatsu
Publication year - 2011
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3551534
Subject(s) - cathodoluminescence , materials science , nanoparticle , luminescence , crystallinity , analytical chemistry (journal) , glow discharge , laser ablation , spectroscopy , transmission electron microscopy , x ray photoelectron spectroscopy , scanning electron microscope , laser , optoelectronics , plasma , nanotechnology , chemical engineering , optics , chemistry , physics , engineering , chromatography , quantum mechanics , composite material
textversion:publisherPulsed laser ablation under an O-2/He glow discharge was studied to improve the surface crystallinity and UV luminescence of ZnO nanoparticles similar to 10 nm in size. X-ray photoemission spectroscopy, scanning transmission electron microscopy, and cathodoluminescence spectroscopy were used to analyze the crystalline structures and chemical components. The results indicated that highly crystalline ZnO nanoparticles were fabricated under the O-2/He plasma discharge. The near band gap UV emission intensities from these particles were roughly five times those of samples fabricated under O-2 gas. The present results suggest the possibility of synthesize high quality ZnO quantum dots or nanoparticles without requiring any post-treatment
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