Room-temperature single-photon emission from zinc oxide nanoparticle defects and their in vitro photostable intrinsic fluorescence

Nanophotonics

article

Kelvin Chung¹  Snjezana Tomljenovic-Hanic¹  Timothy J. Karle¹  Asma Khalid¹  Amanda N. Abraham²  Ravi Shukla²  Brant C. Gibson¹  David A. Simpson¹  Aleksandra B. Djurišic³  Hiroshi Amekura⁴ 

[1] School of Physics, The University of Melbourne;School of Applied Sciences, RMIT University;Department of Physics, The University of Hong Kong;National Institute for Materials Science (NIMS)

关键词: zinc oxide;    optical defects;    single-photon emitters;    intrinsic fluorescence;    HaCaT cells;   

DOI  :  10.1515/nanoph-2015-0138

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Zinc oxide (ZnO) is a promising semiconductor that is suitable for bioimaging applications due to its intrinsic defect fluorescence. However, ZnO generally suffers from poor photostability. We report room-temperature single-photon emission from optical defects found in ZnO nanoparticles (NPs) formed by ion implantation followed by thermal oxidation in a silica substrate. We conduct a thorough investigation into the photophysics of a particularly bright defect and identify other single emitters within the NPs. Photostability was observed when the NPs were removed from the growth substrate and taken up by skin cells for in vitro imaging.

【 授权许可】

CC BY