Journal ArticleDOI
Carbon doping controlled thermoluminescent defect centers in nanoporous alumina for ion beam dosimetry
S. Bhowmick,S. Pal,D. Das,Vipin Kumar Singh,Saif A. Khan,René Hübner,Sudipta Roy Barman,D. Kanjilal,Aloke Kanjilal +8 more
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TLDR
In this article, a detailed X-ray photoelectron spectroscopy analysis suggests the formation of F+ centers by substituting Al3+ ions with C2+ in the vicinity of oxygen vacancies, where depth-dependent study showed the evolution of conducting channels owing to sp2 hybridized C-C bonding.Abstract:
The flexibility of amorphous anodized alumina (AAO) in developing radiation dosimeter for hadron therapy is reported by controlled carbon ion implantation, followed by thermoluminescence (TL) measurements. The efficacy of amorphous AAO in controlling TL sensitivity is found to be governed by an increase in F+ defect centers as a function of carbon concentration, as revealed from the close resemblance of the trend in photoluminescence intensity. Moreover, its nanoporous structure is demonstrated to be advantageous for defect engineering due to the increase in the surface-to-volume ratio. Detailed X-ray photoelectron spectroscopy analysis suggests the formation of F+ centers by substituting Al3+ ions with C2+ in the vicinity of oxygen vacancies, where depth-dependent study showed the evolution of conducting channels owing to sp2 hybridized C–C bonding, leading to a differential charging effect. This work provides a direction to tune nanoporous AAO in its amorphous form for future ion beam dosimetry.read more
Citations
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Journal ArticleDOI
Highly Sensitive Gold Nanoparticles-DNA Nanosensor for γ-Radiation Detection.
TL;DR: This method is simple and fast, which provides a new path for the gamma radiation dosimeter and has potential applications in the assessment of radiation-induced biological effects.
Journal ArticleDOI
Modulation of the Work Function of TiO2 Nanotubes by Nitrogen Doping: Implications for the Photocatalytic Degradation of Dyes
TL;DR: In this paper , the nitrogen doping-induced modulation of Fermi levels in TiO2 nanotubes (TNTs) is investigated for visible-range photocatalytic applications.
Journal ArticleDOI
Revealing carbon mediated luminescence centers with enhanced lifetime in porous alumina
TL;DR: In this article, carbon ion implantation mediated blue photoluminescence (PL) and the corresponding bluish white phosphorescence of anodic aluminum oxide (AAO) are presented.
Journal ArticleDOI
Annealing temperature-driven near-surface crystallization with improved luminescence in self‐patterned alumina films
S. Pal,S. Pal,S. Bhowmick,Saif A. Khan,Alain Claverie,Dinakar Kanjilal,A. K. Bakshi,A. K. Bakshi,Aloke Kanjilal +8 more
TL;DR: The impact of annealing on luminescence properties of radio-frequency magnetron sputtering grown alumina films and their possible application in radiation measurement is presented in this paper, where a comprehensive analysis of optically active defect centers is carried out by room temperature photoluminescence (PL) measurement.
Journal ArticleDOI
Carbon doping-induced defect centers in anodized alumina with enhanced optically stimulated luminescence
S. Bhowmick,S. Pal,S. Pal,Arun K. Singh,Arun K. Singh,Saif A. Khan,D. R. Mishra,D. R. Mishra,R. J. Choudhary,D. M. Phase,T. K. Chini,A. K. Bakshi,A. K. Bakshi,Aloke Kanjilal +13 more
TL;DR: In this article, an almost 20-fold enhancement in continuous wave OSL (CW-OSL) sensitivity was obtained in carbon-doped AAO (C:AAO) by exposing to beta radiation, while an almost linear increase was recorded with increasing dose from 0.3 to 5 Gy.
References
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Journal ArticleDOI
SRIM – The stopping and range of ions in matter (2010)
TL;DR: SRIM as discussed by the authors is a software package concerning the stopping of ion/atom collisions, and individual interatomic potentials have been included for all ion and atom collisions in the SRIM package.
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Ordered Metal Nanohole Arrays Made by a Two-Step Replication of Honeycomb Structures of Anodic Alumina
Hideki Masuda,Kenji Fukuda +1 more
TL;DR: A highly ordered metal nanohole array (platinum and gold) was fabricated by a two-step replication of the honeycomb structure of anodic porous alumina that showed a notable color change compared with bulk gold.
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Progress in Nano-Engineered Anodic Aluminum Oxide Membrane Development
TL;DR: This review article is an overview of the current state of research on AAO membranes and the various applications of nanotechnology that use them in the manufacture of nano-materials and devices or incorporate them into specific applications such as biological/chemical sensors, nano-electronic devices, filter membranes and medical scaffolds for tissue engineering.