SWIFT HEAVY ION IRRADIATION: A NOVEL TECHNIQUE FOR TAILORING THE SIZE OF POLYANILINE NANOFIBERS

2011 ◽  
Vol 10 (01n02) ◽  
pp. 161-165 ◽  
Author(s):  
A. KUMAR ◽  
SOMIK BANERJEE
Keyword(s):  
Interfacial Polymerization ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
X Ray Diffraction ◽  
Polyaniline Nanofibers ◽  
Novel Technique ◽  
Swift Heavy Ion ◽  
Enhanced Strain ◽  
Shi Irradiation ◽  
Microraman Spectroscopy

Swift heavy ion (SHI) (energy > 1 MeV/u) irradiation of polymer nanostructures is a novel technique to tailor their structure and properties. Polyaniline nanofibers synthesized by interfacial polymerization using HCl and camphor sulfonic acid (CSA) as dopants have been irradiated with 90 MeV O 7+ ion at different fluences of 3 × 1010, 3 × 1011, and 1 × 1012 ions/cm2. TEM micrographs of the irradiated nanofibers reveal a gradual decrease in the size of the nanofibers with an increase in fluence, which could be attributed to the strain-induced fragmentation upon SHI irradiation. The generation of strain in the PAni nanofibers upon SHI irradiation can be explained on the basis of the Coulomb explosion model. X-ray diffraction analysis for both the HCl and CSA-doped nanofibers shows broadening of the peak at 2θ = 20.050, which can be attributed to the reduced domain length and enhanced strain in the material. The two contributions have been separated out. The samples have been characterized with microRaman spectroscopy, which shows a decrease in the intensity of the Raman active modes that can be attributed to the reduction in size of the nanofibers leading to the amorphization of the material.

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.

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.

scholarly journals Effects of swift heavy ion irradiation on structural, optical and photocatalytic properties of ZnO–CuO nanocomposites prepared by carbothermal evaporation method

2015 ◽  
Vol 6 ◽  
pp. 928-937 ◽  
Author(s):  
Sini Kuriakose ◽  
D K Avasthi ◽  
Satyabrata Mohapatra
Keyword(s):  
Photocatalytic Activity ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Nanocomposite Thin Films ◽  
Sun Light

ZnO–CuO nanocomposite thin films were prepared by carbothermal evaporation of ZnO and Cu, combined with annealing. The effects of 90 MeV Ni7+ ion irradiation on the structural and optical properties of ZnO–CuO nanocomposites were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV–visible absorption spectroscopy and Raman spectroscopy. XRD studies showed the presence of ZnO and CuO nanostructures in the nanocomposites. FESEM images revealed the presence of nanosheets and nanorods in the nanocomposites. The photocatalytic activity of ZnO–CuO nanocomposites was evaluated on the basis of degradation of methylene blue (MB) and methyl orange (MO) dyes under sun light irradiation and it was observed that swift heavy ion irradiation results in significant enhancement in the photocatalytic efficiency of ZnO–CuO nanocomposites towards degradation of MB and MO dyes. The possible mechanism for the enhanced photocatalytic activity of ZnO–CuO nanocomposites is proposed. We attribute the observed enhanced photocatalytic activity of ZnO–CuO nanocomposites to the combined effects of improved sun light utilization and suppression of the recombination of photogenerated charge carriers in ZnO–CuO nanocomposites.

Microstructural Study of Fe-Implanted SiC: Comparison of Different Post-Implantation Treatments

2009 ◽  
Vol 615-617 ◽  
pp. 461-464 ◽  
Author(s):  
Alain Declémy ◽  
Cyril Dupeyrat ◽  
Lionel Thomé ◽  
Aurelien Debelle
Keyword(s):  
Solid Phase ◽  
Ion Irradiation ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Heavy Ion ◽  
X Ray Diffraction ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Diluted Magnetic ◽  
Post Implantation

Silicon carbide (SiC) could be a good candidate for Diluted Magnetic Semiconductor (DMS). In this paper we report on preliminary results on the microstructure of Fe-implanted 6H-SiC subsequently submitted to Rapid Thermal Annealing (RTA), laser processing in the solid phase and swift heavy ion irradiation and analyzed by means of X-ray diffraction (XRD) and Rutherford backscattering and channeling (RBS/C).

scholarly journals ChemFET sensor: Repercussion of Swift Heavy Ion irradiation on nanorods of nickel-based (NRs-Ni3HHTP2) Metal-Organic framework

2021 ◽  
Author(s):  
Nikesh N. Ingle ◽  
Pasha Sayyad ◽  
Gajanan Bodkhe ◽  
Harshada Patil ◽  
Megha Deshmukh ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Ion Irradiation ◽  
Metal Organic Framework ◽  
Silicon Layer ◽  
Heavy Ion ◽  
Swift Heavy Ion ◽  
Metal Organic ◽  
Shi Irradiation ◽  
Silicon Silicon ◽  
Organic Framework

Abstract Repercussion of Swift Heavy Ion (SHI) irradiation on nickel-based nanorods of Metal-Organic Framework (NRs-Ni3HHTP2-MOF) for enhancement in the properties of ChemFET based gas sensor has been investigated. Nanorods of Ni3HHTP2-MOF were synthesized by chemical method and exposed to C12+ ions irradiation with fluence 1x1011 ion/cm2 and 1x1012 ion/cm2. The structural, spectroscopic morphological and optical characterizations were carried out using x-ray diffraction (XRD), fourier transfer infrared spectroscopy (FTIR), atomic force microscopy (AFM) with scanning electron microscopy (SEM) and UV-visible spectroscopy were studied respectively. Whereas the bandgap was calculated from Tauc's plot. The synthesized nanorods of Ni3HHTP2 MOF were drop-casted on gold coated microelectrodes on silicon/silicon dioxide (Si/SiO2) substrate, where silicon layer serves as a gate and gold microelectrodes on silicon/silicon dioxide (Si/SiO2) substrate as a source and drain. The transmutations in material properties due to SHI irradiations were serviceable for enhancing field-effect transistor (transfer and output) properties.

scholarly journals Online in situ x-ray diffraction setup for structural modification studies during swift heavy ion irradiation

2012 ◽  
Vol 83 (1) ◽  
pp. 013902 ◽  
Author(s):  
C. Grygiel ◽  
H. Lebius ◽  
S. Bouffard ◽  
A. Quentin ◽  
J. M. Ramillon ◽  
...  
Keyword(s):  
Structural Modification ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
X Ray Diffraction ◽  
Swift Heavy Ion Irradiation ◽  
X Ray ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion

Preparation and Modification MnZn Ferrite Thin Films under Swift Heavy Ion (SHI) Irradiation

2011 ◽  
Vol 213 ◽  
pp. 325-329 ◽  
Author(s):  
Jian Rong Sun ◽  
Zhi Guang Wang ◽  
Yu Yu Wang ◽  
Cun Feng Yao ◽  
Kong Fang Wei ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
High Frequency ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Mnzn Ferrite ◽  
Swift Heavy Ion ◽  
Zn Content ◽  
Ferrite Thin Films ◽  
Shi Irradiation

MnZn ferrite thin films are deposited by alternative sputtering technique from two targets with the composition of MnFe2O4 and ZnFe2O4, and the behavior of the magnetic properties of the MnZn ferrite thin films irradiated by Kr26+ ions at energy of 2.03 GeV is investigated by magnetization measurements. The fabricating and modifying conditions on the performance of the films are studied to improve Ms and reduce Hc of the films, making the films suitable to the applications of high-frequency film devices. For Mn1-xZnxFe2O4 thin films, the Ms increases firstly then decreases and Hc decreases monotonously with increasing Zn content. And both Ms and Hc are sensitive to Kr26+ ion irradiation and exhibit different behaviors depending on the ion fluence range. The 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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