Journal
OPTICAL MATERIALS
Volume 33, Issue 11, Pages 1829-1832Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2011.07.009
Keywords
Nanocrystals; Light emission; Germanium materials; Aerosol synthesis
Categories
Funding
- AFOSR [FA9550-06-1-0470]
- National Science Foundation [DMR-02-13282]
Ask authors/readers for more resources
We have used aerosol deposition to synthesize defect and micro-strain free, ultra-pure germanium nanoparticles. Transmission electron microscopy images show a core-shell configuration with highly crystalline core material. Powder X-ray diffraction measurements verify the presence of highly pure, nano-scale germanium with average crystallite size of 30 nm and micro-strain of 0.058%. X-ray photoelectron spectroscopy demonstrates that GeOx (x <= 2) shells cover the surfaces of the nanoparticles. Under optical excitation, these nanoparticles exhibit two separate emission bands at room temperature: a visible emission at 500 nm with 0.5-1 ns decay times and an intense near-infrared emission at 1575 nm with up to similar to 20 mu s lifetime. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available