Single-Crystalline ZnO Spherical Particles by Pulsed Laser Irradiation of Colloidal Nanoparticles for Ultraviolet Photodetection
| Autor: | Helmuth Moehwald, Dmitry G. Shchukin, Naoto Koshizaki, Hongqiang Wang, Alexander Pyatenko |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
business.industry Physics::Medical Physics Physics::Optics Nanoparticle Photodetection Microstructure Laser medicine.disease_cause eye diseases law.invention Crystal Condensed Matter::Materials Science law Ultraviolet light medicine Optoelectronics QD General Materials Science sense organs Irradiation business Ultraviolet |
| Zdroj: | ACS APPLIED MATERIALS & INTERFACES |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/am500443a |
| Popis: | We report the formation and ultraviolet (UV) photodetection of single-crystalline spherical ZnO particles by pulsed laser irradiation of commercial ZnO nanoparticles in water. The phase and microstructure analysis before and after laser irradiation reveals a crystal size increase and shape transformation from irregular to spherical. Time-dependent laser irradiation confirmed that fusion is the reason for nanoparticle growth up to single-crystalline spherical particles. After rapid cooling, they maintain size and shape and possess unique optical and electrical properties. Because of the single-crystalline feature and smooth surfaces, high and selective sensing of ultraviolet light is observed. |
| Databáze: | OpenAIRE |
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