%0 Journal Article %1 RN76 %A Magon, C.J. %A Lima, J.F. %A Donoso, J.P. %A Lavayen, V. %A Benavente, E. %A Navas, D. %A Gonzalez, G. %D 2012 %I 2012 Elsevier Inc. %J Journal of Magnetic Resonance %K (epr), (esr), (fdm), (kbdm), basis detection, diagonalization dqcauchile electron filter filter-diagonalization frequencies, harmonic inversion, krylov leak method method, nanotubes, oxide, paramagnetic resonance resonance, signals spin vanadium %P 26-33 %R 10.1016/j.jmr.2012.06.004 %T Deconvolution of the Epr Spectra of Vanadium Oxide Nanotubes %U /brokenurl#<Go to ISI>://WOS:000308120300004 %V 222 %X In this work we report results of continuous wave (CW) electron paramagnetic resonance (EPR) spectroscopy of vanadium oxide nanotubes. The observed EPR spectra are composed of a weak well-resolved spectrum of isolated V4+ ions on top of an intense and broad structure-less line shape, attributed to spin-spin exchanged V4+ clusters. With the purpose to deconvolute the structured weak spectrum from the composed broad line, a new approach based on the Krylov basis diagonalization method (KBDM) is introduced. It is based on the discrimination between broad and sharp components with respect to a selectable threshold and can be executed with few adjustable parameters, without the need of a priori information on the shape and structure of the lines. This makes the method advantageous with respect to other procedures and suitable for fast and routine spectral analysis, which, in conjunction with simulation techniques based on the spin Hamiltonian parameters, can provide a full characterization of the EPR spectrum. Results demonstrate and characterize the coexistence of two V4+ species in the nanotubes and show good progress toward the goal of obtaining high fidelity deconvoluted spectra from complex signals with overlapping broader line shapes.

@article{RN76, abstract = {In this work we report results of continuous wave (CW) electron paramagnetic resonance (EPR) spectroscopy of vanadium oxide nanotubes. The observed EPR spectra are composed of a weak well-resolved spectrum of isolated V4+ ions on top of an intense and broad structure-less line shape, attributed to spin-spin exchanged V4+ clusters. With the purpose to deconvolute the structured weak spectrum from the composed broad line, a new approach based on the Krylov basis diagonalization method (KBDM) is introduced. It is based on the discrimination between broad and sharp components with respect to a selectable threshold and can be executed with few adjustable parameters, without the need of a priori information on the shape and structure of the lines. This makes the method advantageous with respect to other procedures and suitable for fast and routine spectral analysis, which, in conjunction with simulation techniques based on the spin Hamiltonian parameters, can provide a full characterization of the EPR spectrum. Results demonstrate and characterize the coexistence of two V4+ species in the nanotubes and show good progress toward the goal of obtaining high fidelity deconvoluted spectra from complex signals with overlapping broader line shapes. }, added-at = {2019-12-04T03:57:35.000+0100}, author = {Magon, C.J. and Lima, J.F. and Donoso, J.P. and Lavayen, V. and Benavente, E. and Navas, D. and Gonzalez, G.}, biburl = {https://www.bibsonomy.org/bibtex/2f556081005ea27e5904c4e66ff34e3e6/dqcauchile}, doi = {10.1016/j.jmr.2012.06.004}, interhash = {43247bc34089046fb951d73e22f75c12}, intrahash = {f556081005ea27e5904c4e66ff34e3e6}, issn = {1090-7807}, journal = {Journal of Magnetic Resonance}, keywords = {(epr), (esr), (fdm), (kbdm), basis detection, diagonalization dqcauchile electron filter filter-diagonalization frequencies, harmonic inversion, krylov leak method method, nanotubes, oxide, paramagnetic resonance resonance, signals spin vanadium}, pages = {26-33}, publisher = {2012 Elsevier Inc.}, timestamp = {2019-12-04T03:58:17.000+0100}, title = {Deconvolution of the Epr Spectra of Vanadium Oxide Nanotubes}, type = {Journal Article}, url = {/brokenurl#<Go to ISI>://WOS:000308120300004}, volume = 222, year = 2012 }