Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 4, Pages 2241-2247Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am500443a
Keywords
ZnO; pulsed laser irradiation; photodetection; single crystalline; spherical particles
Funding
- Alexander von Humboldt Foundation
- [20360340]
- Grants-in-Aid for Scientific Research [21110004] Funding Source: KAKEN
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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.
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