PERFORM Publications

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Title		Authors	PubMed ID
1	Variable-frequency EPR study of Mn(2+)-doped NH(4)Cl(0.9)I(0.1) single crystal at 9.6, 36, and 249.9 GHz: structural phase transition.	Misra SK, Andronenko SI, Rinaldi G, Chand P, Earle KA, Freed JH	12615154 PHYSICS
2	A variable temperature EPR study of Mn(2+)-doped NH(4)Cl(0.9)I(0.1) single crystal at 170 GHz: zero-field splitting parameter and its absolute sign.	Misra SK, Andronenko SI, Chand P, Earle KA, Paschenko SV, Freed JH	15862243 PHYSICS
3	Calculation of Double-Quantum-Coherence Two-dimensional Spectra: Distance Measurements and Orientational Correlations.	Misra SK, Borbat PP, Freed JH	20161423 PHYSICS
4	A 236-GHz Fe EPR STUDY OF NANO-PARTICLES OF THE FERRO-MAGNETIC ROOM-TEMPERATURE SEMICONDUCTOR Sn(1-x)Fe(x)O(2)(x=0.005).	Misra SK, Andronenko SI, Punnoose A, Tipikin D, Freed JH	20161547 PHYSICS
5	A multifrequency EPR study of Fe2+ and Mn2+ ions in a ZnSiF(6).6H2O single crystal at liquid-helium temperatures.	Misra SK, Diehl S, Tipikin D, Freed JH	20395160 PHYSICS
6	Study of paramagnetic defect centers in as-grown and annealed TiO2 anatase and rutile nanoparticles by a variable-temperature X-band and high-frequency (236 GHz) EPR.	Misra SK, Andronenko SI, Tipikin D, Freed JH, Somani V, Prakash O	27041794 PHYSICS

Title:	Study of paramagnetic defect centers in as-grown and annealed TiO2 anatase and rutile nanoparticles by a variable-temperature X-band and high-frequency (236 GHz) EPR.
Authors:	Misra SK, Andronenko SI, Tipikin D, Freed JH, Somani V, Prakash O
Link:	https://www.ncbi.nlm.nih.gov/pubmed/27041794?dopt=Abstract
Publication:
Keywords:
PMID:	27041794	Category:	J Magn Magn Mater	Date Added:	2019-06-04
Dept Affiliation:	PHYSICS 1 Physics Department, Concordia University, 1455 de Maisonneuve Blvd West, Montreal, QC H3G 1M8, Canada. 2 ACERT Biomedical Center, Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, USA. 3 Department of Metallurgical Engineering and Material Science, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India.

Description:

Study of paramagnetic defect centers in as-grown and annealed TiO2 anatase and rutile nanoparticles by a variable-temperature X-band and high-frequency (236 GHz) EPR.

J Magn Magn Mater. 2016 Mar 01;401:495-505

Authors: Misra SK, Andronenko SI, Tipikin D, Freed JH, Somani V, Prakash O

Abstract

Detailed EPR investigations on as-grown and annealed TiO2 nanoparticles in the anatase and rutile phases were carried out at X-band (9.6 GHz) at 77, 120-300 K and at 236 GHz at 292 K. The analysis of EPR data for as-grown and annealed anatase and rutile samples revealed the presence of several paramagnetic centers: Ti3+, O-, adsorbed oxygen (O2-) and oxygen vacancies. On the other hand, in as-grown rutile samples, there were observed EPR lines due to adsorbed oxygen (O2-) and the Fe3+ ions in both Ti4+ substitutional positions, with and without coupling to an oxygen vacancy in the near neighborhood. Anatase nanoparticles were completely converted to rutile phase when annealed at 1000° C, exhibiting EPR spectra similar to those exhibited by the as-grown rutile nanoparticles. The high-frequency (236 GHz) EPR data on anatase and rutile samples, recorded in the region about g = 2.0 exhibit resolved EPR lines, due to O- and O2- ions enabling determination of their g-values with higher precision, as well as observation of hyperfine sextets due to Mn2+ and Mn4+ ions in anatase.

PMID: 27041794 [PubMed - as supplied by publisher]

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