A comprehensive facility for EXAFS measurements at the INDUS-2 synchrotron source at RRCAT, Indore, India
Sohini Basu,Chandrani Nayak,Ashok Kumar Yadav,A. Agrawal,A.K. Poswal,Debnath Bhattacharyya,Shambhu Nath Jha,N.K. Sahoo +7 more
- Vol. 493, Iss: 1, pp 012032
TLDR
The EXAFS technique, which deals with fine structure oscillations observed in the X-ray absorption spectrum of an element from 50 eV to ~700 eV above its absorption edge, gives precise information regarding the short range order and local structure around the particular atomic species in the material as discussed by the authors.Abstract:
The EXAFS technique, which deals with fine structure oscillations observed in the X-ray absorption spectrum of an element from 50 eV to ~700 eV above its absorption edge, gives precise information regarding the short range order and local structure around the particular atomic species in the material. With the advent of modern bright synchrotron radiation sources, EXAFS has emerged to be the most powerful local structure determination technique, which can be applied to any type of material viz. amorphous, polycrystalline, polymers, surfaces and solutions etc. Over the last few years a comprehensive facility for carrying out EXAFS measurements with synchrotron radiation over variety of samples has been developed at the 2.5 GeV, Synchrotron Radiation Source (INDUS-2) at RRCAT, Indore, India. The facility consists of two operational beamlines viz., the energy dispersive EXAFS beamline (BL-08) and the Energy Scanning EXAFS beamline (BL-09).read more
Citations
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Search for Origin of Room Temperature Ferromagnetism Properties in Ni-Doped ZnO Nanostructure
Amit Kumar Rana,Yogendra Kumar,Parasmani Rajput,Shambhu Nath Jha,Debnath Bhattacharyya,Parasharam M. Shirage +5 more
TL;DR: It is proposed that the effect of the Ni ions as well as the inherent exchange interactions arising from VO+ assist to produce BMPs, which are accountable for the RT-FM in Zn1-xNixO (0< x < 0.125) system.
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Luminescence Properties of SrZrO3/Tb3+ Perovskite: Host-Dopant Energy-Transfer Dynamics and Local Structure of Tb3+
Santosh K. Gupta,Partha Sarathi Ghosh,Ashok Kumar Yadav,Nimai Pathak,Ashok Arya,Shambhu Nath Jha,Debnath Bhattacharyya,Ramakant Mahadeo Kadam +7 more
TL;DR: SrZrO3 perovskite (SZP) was synthesized using gel-combustion route and characterized systematically using X-ray diffraction and time-resolved photoluminescence techniques, showing that emission spectrum consists of host as well as Tb(3+) emission indicating the absence of complete host-dopant energy transfer.
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Deciphering the Role of Charge Compensator in Optical Properties of SrWO4:Eu3+:A (A = Li+, Na+, K+): Spectroscopic Insight Using Photoluminescence, Positron Annihilation, and X-ray Absorption.
Santosh K. Gupta,Kathi Sudarshan,Ashok Kumar Yadav,Ruma Gupta,Debnath Bhattacharyya,Shambhu Nath Jha,Ramakant Mahadeo Kadam +6 more
TL;DR: The results have shown that the luminescence lifetime is better when the vacancy concentration is lower as induced by Na+ and K+ codoping, while the emission intensity is higher in the samples when distortion around Eu3+ is reduced asinduced by Li+ codoped.
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Graphene Quantum Dot Solid Sheets: Strong blue-light-emitting & photocurrent-producing band-gap-opened nanostructures.
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TL;DR: The production of micron-sized sheets by interconnecting graphene quantum dots (GQDs), which are termed ‘GQD solid sheets’, with intrinsic absorption and emission properties, with clear evidence for the metal-mediated growth process.
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Scalable Production of Cobalt Phthalocyanine Nanotubes: Efficient and Robust Hollow Electrocatalyst for Ammonia Synthesis at Room Temperature.
Uttam Kumar Ghorai,Sourav Paul,Biswajit Ghorai,Ashadul Adalder,Samadhan Kapse,Ranjit Thapa,Abharana Nagendra,Amal Gain +7 more
TL;DR: In this article, stable β-cobalt phthalocyanine (CoPc) nanotubes have been synthesized by a scalable solvothermal method for electrochemical NRR.
References
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Journal ArticleDOI
First results from a dispersive EXAFS beamline developed at INDUS-2 synchrotron source at RRCAT, Indore, India
TL;DR: A dispersive extended X-ray absorption fine structure (EXAFS) beamline employing an elliptically bent crystal and a position-sensitive CCD detector has been developed at the BL-8 bending magnet port of INDUS-2 synchrotron source at RRCAT, Indore, India.
Journal ArticleDOI
Probing local environments in Eu3+ doped SrSnO3 nano-rods by luminescence and Sr K-edge EXAFS techniques
Saibal Basu,Dinesh K. Patel,J. Nuwad,Vasanthakumaran Sudarsan,Shambhu Nath Jha,Debnath Bhattacharyya,Rajesh K. Vatsa,Shailendra K. Kulshreshtha +7 more
TL;DR: In this paper, a detailed luminescence study on Eu 3+ doped SrSnO 3 nano-rods having body centered tetragonal structure, confirmed that up to 1.5% Eu3+ ions occupied Sr 2+ site in the lattice and is having a less polarisable environment.
Journal ArticleDOI
Transport and magnetic properties of Fe doped CaMnO3
Neetika,A. K. Das,Indu Dhiman,A. K. Nigam,Ashok Kumar Yadav,Debnath Bhattacharyya,Sher Singh Meena +6 more
TL;DR: In this article, the structural, transport, and magnetic properties of CaMn1−xFexO3−δ (0.3) have been studied by using resistivity, magnetization, and neutron powder diffraction techniques.
Journal ArticleDOI
X-ray absorption spectroscopy of doped ZrO2 systems
Saibal Basu,Salil Varma,A.N. Shirsat,B.N. Wani,Shyamala R. Bharadwaj,Amitava Chakrabarti,Shambhu Nath Jha,Debnath Bhattacharyya +7 more
TL;DR: In this paper, the effect of change in ionic radius as well as concentration of the dopants on the above parameters has been thoroughly studied, in some cases, have also been corroborated by first principle calculations of the energetics of the systems.
Journal ArticleDOI
Extended X-ray absorption fine structure study of Gd doped ZrO2 systems
Sohini Basu,Salil Varma,A.N. Shirsat,B.N. Wani,Shyamala R. Bharadwaj,Aparna Chakrabarti,S. N. Jha,Debnath Bhattacharyya +7 more
TL;DR: In this article, an extended x-ray absorption fine structure (EXAFS) spectroscopy measurement around Gd L3 edge with Synchrotron radiation has been carried out to find out relevant local structure parameters of the Gd-O and GdGd(Zr) shells, viz., bond distances, co-ordination numbers, and disorder parameters.
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