Electron spin resonance and optical absorption spectra of Cu2+ ions in xNaI(30 - x)Na2O70B2O3 glasses

Shareefuddin, Md.; Jamal, Md.; Chary, M. Narasimha

doi:10.1016/0022-3093(95)00627-3

Cited by 28 publications

(17 citation statements)

References 28 publications

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“…4a) for the xerogel exhibits a pronounced peak at g N "2.095 and a poorly resolved quadruplet at g # "2.305 arising from parallel hyperfine splitting. Such spectral features are characteristic of d ions in axially distorted octahedral sites present in glassy systems (6,8,11,13,14). When the sample is heated, the spectra (Figs.…”

Section: Resultsmentioning

confidence: 96%

“…For the second component, the spin-Hamiltonian parameters correspond to copper ions that remain isolated on the TiO surface even after thermal treatment. The g # and g N values are characteristic of an axially distorted octahedral site (13)(14)(15)(16). The last component shows g values which correspond to copper ions present in an orthorhombic symmetry.…”

Section: Resultsmentioning

confidence: 99%

“…The ESR signal of Cu(II) ions incorporated into solids can provide information about the environment in which the paramagenetic centers are situated. Several ESR studies of Cu(II) ions in oxide glasses and zeolites have been made recently (6,11,(13)(14)(15)(16)(17). The XPS technique is useful to determine the chemical structure of the surface.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

TPR, ESR, and XPS Study of Cu2+Ions in Sol–Gel-Derived TiO2

Córdoba

Viniegra

Fierro

et al. 1998

Journal of Solid State Chemistry

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

TPR, ESR, and XPS Study of Cu2+Ions in Sol–Gel-Derived TiO2

Córdoba

Viniegra

Fierro

et al. 1998

Journal of Solid State Chemistry

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“…However, it has been reported that Cu +2 is rarely found in regular octahedral site [18,20]. Previous studies of electron paramagnetic resonance and optical absorption have suggested that the octahedral is tetrahedrally distorted, resulting in a strong elongation along the z-axis [21,22]. This effect, known as Janh-Teller, leads to a splitting of 2 E g levels into 2 A 1g and 2 B 1g , while 2 T 2g splits into 2 E g and 2 B 2g [17,20].…”

Section: Resultsmentioning

confidence: 99%

Generation of copper nanoparticles induced by fs-laser irradiation in borosilicate glass

Almeida¹,

Boni²,

Avansi³

et al. 2012

Opt. Express

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Glasses containing metallic nanoparticles are promising materials for technological applications in optics and photonics. Although several methods are available to generate nanoparticles in glass, only femtosecond lasers allow controlling it three-dimensionally. In this direction, the present work investigates the generation of copper nanoparticles on the surface and in the bulk of a borosilicate glass by fslaser irradiation. We verified the formation of copper nanoparticles, after heat treatment, by UV-Vis absorption, transmission electron microscopy and electron diffraction. A preferential growth of copper nanoparticles was observed in the bottom of the irradiated region, which was attributed to self-focusing in the glass. in borosilicate glasses using ultrafast laser irradiation," J. ©2012 Optical Society of America

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“…10-4 cm-' [5][6][7][8][9][10][11]. The local symmetry assumed for Cuz+ ions in these cases was tetragonally elongated octahedron (D4h) in a six-coordinated form.…”

Section: Introductionmentioning

confidence: 99%

EPR studies of Cu2+ and V4+ ions in phosphate glasses

et al. 1999

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Two lead-phosphate glass systems doped with both copper and vanadium ions in different ratios were studied by EPR (electron paramagnetic resonance) method. EPR spectra and parameters (g = 2.44, gl = 2.08 and A 11 = 117.6. 10 4 cm') obtained for x(CuO • V 2 05)(1-x)[2P2O5 • PbO] glasses with x <-10 mol% suggest a tetrahedral (Td) coordination of Cu e+ ions and not a tetragonally elongated octahedron as has been assumed in previous works. The ground state of the paramagnetic electron is the dzy. copper orbital with a 4p, contribution of 6%. For 20 <-x <-40 mol% a broad line (AB = 307 G) characteristic for clustered ions appears at g = 2.18. The V°+ ions are evidenced only in the spectra of x(Cu0. 2V205)(1-x)[2P205 • PbO] glasses and the resonance parameters suggest a pentacoordinated C 4v local symmetry for these ions. The hyperfine structures characteristic for Cu e+ and V4 ions disappear for 10 -< x <_ 40 mol% due to the mixed exchange Cue'-V4 pair formation in these glasses.

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Electron spin resonance and optical absorption spectra of Cu2+ ions in xNaI(30 - x)Na2O70B2O3 glasses

Cited by 28 publications

References 28 publications

TPR, ESR, and XPS Study of Cu2+Ions in Sol–Gel-Derived TiO2

TPR, ESR, and XPS Study of Cu2+Ions in Sol–Gel-Derived TiO2

Generation of copper nanoparticles induced by fs-laser irradiation in borosilicate glass

EPR studies of Cu2+ and V4+ ions in phosphate glasses

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