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Optical Sensing Properties of ZnO Nanoparticles Prepared by Spray Pyrolysis
- Authors
- Lee, Geon Joon; Choi, Eun Ha; Nam, Sang-Hun; Lee, Jin Su; Boo, Jin-Hyo; Oh, Si Duck; Choi, Suk-Ho; Cho, Jun-Haeng; Yoon, Moon-Young
- Issue Date
- Feb-2019
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- ZnO Nanoparticles; Peptide; Photoluminescence; Exciton; Optical Sensing
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.19, no.2, pp.1048 - 1051
- Indexed
- SCIE
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 19
- Number
- 2
- Start Page
- 1048
- End Page
- 1051
- ISSN
- 1533-4880
- Abstract
- We studied the optical sensing properties of ZnO nanoparticles prepared by spray pyrolysis. To investigate their optical sensing performance, we incubated peptides on ZnO nanoparticles. The photoluminescence (PL) peak intensity of peptides on the ZnO nanoparticles was higher than that of peptides on the ZnO film or on the glass plate. This observed PL enhancement is attributed to the optical confinement of ZnO nanoparticles. The low-temperature spectra displayed a strong exciton emission peak with multiple sidebands, attributed to the bound exciton and its longitudinal optical phonon sidebands. The strong exciton emission is thought to be the combined effect of optical confinement due to the nanoparticle geometry, reduction of defect emission by thermal annealing, and reduction of non-radiative relaxation at low temperatures.
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Related Researcher
- Cho, Jun Hyung
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)