scholarly journals Enhancement of Ammonia Sensitivity in Swift Heavy Ion Irradiated NanocrystallineSnO2Thin Films

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Sanju Rani ◽  
Somnath C. Roy ◽  
N. K. Puri ◽  
M. C. Bhatnagar ◽  
D. Kanjilal
Keyword(s):  
Thin Films ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Energy Levels ◽  
Sol Gel ◽  
Heavy Ion ◽  
High Energy ◽  
Electronic Energy ◽  
Response Characteristics ◽  
Swift Heavy Ion

Swift heavy ion irradiation is an effective technique to induce changes in the microstructure and electronic energy levels of materials leading to significant modification of properties. Here we report enhancement of ammonia (NH3) sensitivity ofSnO2thin films subjected to high-energyNi+ion irradiation. Sol-gel-derivedSnO2thin films (100 nm thickness) were exposed to 75 MeVNi+ion irradiation, and the gas response characteristics of irradiated films were studied as a function of ion fluence. The irradiated films showedp-type conductivity with a much higher response toNH3compared to other gases such as ethanol. The observed enhancement ofNH3sensitivity is discussed in context of ion beam generated electronic states in theSnO2thin films.

Study of Swift Heavy Ion Irradiation Induced Nanophases of TiO2

2013 ◽  
Vol 24 ◽  
pp. 133-139 ◽  
Author(s):  
Madhavi Thakurdesai ◽  
A. Mahadkar ◽  
Varsha Bhattacharyya
Keyword(s):  
Thin Films ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Heavy Ion ◽  
High Energy ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Non Equilibrium

Ion beam irradiation is a unique non-equilibrium technique for phase formation and material modification. Localized rise in temperature and ultra fast (~1012 s) dissipations of impinging energy make it an attractive tool for nanostructure synthesize. Dense electronic excitation induced spatial and temporal confinement of high energy in a narrow dimension leads the system to a highly non-equilibrium state and the system then relaxes dynamically inducing nucleation of nanocrystals along the latent track. In the present investigation, amorphous thin films of TiO2 are irradiated by 100 MeV Ag ion beam. These irradiated thin films are characterized by Atomic Force Microscopy (AFM), Glancing Angle X-ray Diffraction (GAXRD), Transmission Electron Microscopy (TEM) and UV-VIS absorption spectroscopy. AFM and TEM studies indicate formation of circular nanoparticles of size 10±2 nm in a film irradiated at a fluence of 1×1012 ions.cm-2. Nanophase formation is also inferred from the blueshift observed in UV-VIS absorption band edge.

Swift heavy ion irradiation induced modification of BiFeO3 thin films prepared by sol-gel method

2010 ◽  
Vol 84 (10) ◽  
pp. 1315-1320 ◽  
Author(s):  
B. N. Dash ◽  
Priyadarshini Dash ◽  
Haripriya Rath ◽  
P. Mallick ◽  
R. Biswal ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Irradiation ◽  
Sol Gel ◽  
Heavy Ion ◽  
Swift Heavy Ion Irradiation ◽  
Gel Method ◽  
Sol Gel Method ◽  
Heavy Ion Irradiation ◽  
Bifeo3 Thin Films ◽  
Swift Heavy Ion

Electron and ion irradiation-induced dissolution of mechanical twins in the intermetalic U3Si: An in situ HVEM study

1989 ◽  
Vol 47 ◽  
pp. 652-653
Author(s):  
Charles W. Allen ◽  
Robert C. Birtcher
Keyword(s):  
Elevated Temperatures ◽  
Ion Irradiation ◽  
Ion Beam ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Heavy Ion ◽  
High Energy ◽  
Mechanical Twinning ◽  
In Situ Experiments

The uranium silicides, including U3Si, are under study as candidate low enrichment nuclear fuels. Ion beam simulations of the in-reactor behavior of such materials are performed because a similar damage structure can be produced in hours by energetic heavy ions which requires years in actual reactor tests. This contribution treats one aspect of the microstructural behavior of U3Si under high energy electron irradiation and low dose energetic heavy ion irradiation and is based on in situ experiments, performed at the HVEM-Tandem User Facility at Argonne National Laboratory. This Facility interfaces a 2 MV Tandem ion accelerator and a 0.6 MV ion implanter to a 1.2 MeV AEI high voltage electron microscope, which allows a wide variety of in situ ion beam experiments to be performed with simultaneous irradiation and electron microscopy or diffraction.At elevated temperatures, U3Si exhibits the ordered AuCu3 structure. On cooling below 1058 K, the intermetallic transforms, evidently martensitically, to a body-centered tetragonal structure (alternatively, the structure may be described as face-centered tetragonal, which would be fcc except for a 1 pet tetragonal distortion). Mechanical twinning accompanies the transformation; however, diferences between electron diffraction patterns from twinned and non-twinned martensite plates could not be distinguished.

scholarly journals The impact of fluence dependent 120 MeV Ag swift heavy ion irradiation on the changes in structural, electronic, and optical properties of AgInSe2 nano-crystalline thin films for optoelectronic applications

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26218-26227
Author(s):  
R. Panda ◽  
S. A. Khan ◽  
U. P. Singh ◽  
R. Naik ◽  
N. C. Mishra
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Nano Crystalline ◽  
Shi Irradiation ◽  
The Impact

Swift heavy ion (SHI) irradiation in thin films significantly modifies the structure and related properties in a controlled manner.

Correlation between changes in nanoscale structural and optical properties upon swift heavy ion irradiation of SiNx thin films

2021 ◽  
Vol 129 (3) ◽  
pp. 035108
Author(s):  
Harsh Gupta ◽  
Ravi K. Bommali ◽  
Santanu Ghosh ◽  
Himanshu Srivastava ◽  
Arvind Srivastava ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Structural And Optical Properties ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion

Ion beam-mixing effects in nearly lattice-matched AlInN/GaN heterostructures by swift heavy ion irradiation

2012 ◽  
Vol 167 (7) ◽  
pp. 506-511 ◽  
Author(s):  
G. Devaraju ◽  
S. V.S. Nageswara Rao ◽  
N. Srinivasa Rao ◽  
V. Saikiran ◽  
T. K. Chan ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Ion Beam ◽  
Heavy Ion ◽  
Ion Beam Mixing ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Mixing Effects ◽  
Swift Heavy Ion ◽  
Lattice Matched

Preparation and Modification of Magnetite Thin Films by Swift Kr-Ion Irradiation

2010 ◽  
Vol 160-162 ◽  
pp. 1012-1015
Author(s):  
Jian Rong Sun ◽  
Zhi Guang Wang ◽  
Yu Yu Wang ◽  
Kong Fang Wei ◽  
Tie Long Shen ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Irradiation ◽  
Magnetic Moments ◽  
Heavy Ion ◽  
Crystallographic Structure ◽  
Swift Heavy Ion ◽  
Columnar Defects ◽  
Magnetite Fe3o4 ◽  
Shi Irradiation ◽  
Fe3o4 Thin Film

Polycrystalline magnetite (Fe3O4) thin films is synthesized at low temperature (90 oC) by electroless plating in aqueous solution, and the behavior of the magnetic property of the Fe3O4 thin film irradiated by Kr26+ ions at energy of 2.03 GeV is investigated by magnetization measurements. The initial crystallographic structure of the Fe3O4 remains unaffected after swift heavy ion (SHI) irradiation, but both coercive force and saturation magnetization are sensitive to Kr26+ ion irradiation and exhibit different behaviors depending on the ion fluence range. And SHI irradiation could make the magnetic moments of the Fe3O4 films ordered around the columnar defects and the magnetic moments tend to arrange along the films plane. All modifications of the magnetic properties could be interpreted very well by the effects related to the stress and defects induced by SHI irradiation.

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