Record Details

Stable ensemble brightness from nitrogen vacancy centers in nanodiamonds through optimized surface composition

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Stable ensemble brightness from nitrogen vacancy centers in nanodiamonds through optimized surface composition
 
Creator Sandeep
Kumar, Ravi
Subhedar, Kiran Mahadeo
Kumar, Raj
Dhakate, Sanjay Rangnath
 
Subject Nanodiamonds
Nitrogen vacancy centers
Air oxidation
Ensemble photo-stability
 
Description 1071-1079
Stable ensemble emission from nitrogen vacancy (NV) centers in nanodiamonds (NDs) is highly desirable for diverse areas ranging from bio-imaging to quantum optics. The uniqueness of NV centers lies in their opto-spin properties like energy level structure, emission range (620-850 nm) and optical spin polarization. The host matrix (NDs), however, put some limitation on the photo-physical properties of these color centers. One of the major issues is surface proximity (where high concentration of defects are present) of NV centers. The NV centers being highly sensitive to the neighboring environment are unstable in such circumstances. The surface of NDs mainly exhibit non-diamond carbon which is well-known quencher of emission due to NV centers. The surface composition for desirable photo-physical properties of NV centers is still unknown. Here, we have systemically studied the effect of oxidation time at low oxidation temperature (450 oC) on the selective removal of sp2 carbon, aqueous dispersion of NDs and emission collection due to NV centers at ensemble level. Among different air oxidations, heat treatment at 450 oC at residual time of 8 hours has been found to be suitable air oxidation conditions for the enhancement of brightness and ensemble photo-stability of NV centers.
 
Date 2021-02-22T08:54:03Z
2021-02-22T08:54:03Z
2020-12
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/56269
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJEMS Vol.27(6) [December 2020]