Impact of Mn-dopant concentration in observing narrowing of band-gap, urbach tail and paramagnetism in anatase TiO2 nanocrystals

2019 ◽  
Vol 43 (37) ◽  
pp. 14786-14799 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
M. Vasundhara

In addition to the numerous applications of Mn-doped TiO2, it could be a potential candidate as a dilute magnetic semiconductor.

RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 41994-42008 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Shubhra Dash ◽  
Ajit K. Patra ◽  
Guruprasad Mandal ◽  
...  

Oxide based dilute magnetic semiconductor materials are of great interest and this study focusses on the optical and magnetic behavior of non-magnetic element doped TiO2 nanocrystals which provides a significant reduction in bandgap with enhanced magnetization.


2013 ◽  
Vol 13 (8) ◽  
pp. 5391-5400 ◽  
Author(s):  
P. Mohanapriya ◽  
Clastin I. Sathish ◽  
R. Pradeepkumar ◽  
Hiroyo Segawa ◽  
Kazunari Yamaura ◽  
...  

2019 ◽  
Vol 43 (15) ◽  
pp. 6048-6062 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
Anupama Chanda ◽  
M. Vasundhara

The nature of BMPs, whether overlapped or isolated, determines the magnetic behavior of Fe-doped TiO2.


2018 ◽  
Vol 122 (46) ◽  
pp. 26592-26604 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
Geeta R. Mutta ◽  
Anupama Chanda ◽  
...  

2011 ◽  
Vol 403-408 ◽  
pp. 753-757
Author(s):  
Affa Rozana Abdul Rashid ◽  
P. Susthitha Menon ◽  
Sahbudin Shaari

Undoped and Mn doped ZnO films with different percentage of doping concentration (2%, 4%, 6% and 8%) were synthesized by sol gel method with an annealing temperature of 400°C. As to investigate the physical properties and microstructures, the samples are characterized using FESEM. The surface morphology images on the films showed many spherical shaped nanoparticles and separate uniformly. Meanwhile, the optical properties were characterized using UV-Vis where the transmittance and band gap value were affected by certain amount of Mn concentration. These films achieve tunable band gap characteristics by means of changing the dopant concentration. At lower concentration, 2% and 4% of Mn, the band gap is reducing compare to undoped ZnO. At higher doping for 6% and 8% of Mn, the bang gap suddenly increased.


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