Temperature-dependent fluorescence in nanodiamonds

Here, we report that nanodiamonds (NDs) exhibit blue fluorescence with an emission peak at around 400 nm. With increasing temperature, the peak energy of fluorescence was found to demonstrate a blue shift, possibly due to excited excitons populating higher-energy states, such as oxidation defect sta...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics express 2017-02, Vol.10 (2), p.25102
Main Authors: Su, Li-Xia, Lou, Qing, Zang, Jin-Hao, Shan, Chong-Xin, Gao, Yuan-Fei
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Here, we report that nanodiamonds (NDs) exhibit blue fluorescence with an emission peak at around 400 nm. With increasing temperature, the peak energy of fluorescence was found to demonstrate a blue shift, possibly due to excited excitons populating higher-energy states, such as oxidation defect states. The intensity evolution of the fluorescence was attributed to a thermally activated process. Moreover, the bandwidth of fluorescence also increased because of exciton-phonon interactions and ionized impurity scattering. The above results indicate that the fluorescence of NDs could originate from radiative recombination through intrinsic transitions between highly localized π states.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.10.025102