Electron Spin Resonance (Esr) Study of VO2+ Doped Germanium Dioxide Synthesized Via the Sol-Gel Process

MRS Proceedings ◽

10.1557/proc-346-243 ◽

1994 ◽

Vol 346 ◽

Author(s):

Juan Mendez-Vivar ◽

R. Arroyo

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Sol Gel ◽

Germanium Dioxide ◽

Gravimetric Analysis ◽

Doping Agent ◽

As Doping ◽

Vis Spectroscopy ◽

Spin Resonance ◽

Sol Gel Process

ABSTRACTVOSO4.3H2O was used as doping agent to prepare GeO2 xerogels, via the sol-gel process. Samples were analyzed by Thermal Gravimetric Analysis (TGA), Differential Thermal Analysis, (DTA), Diffuse reflectance (UV-Vis) spectroscopy and electron spin resonance (ESR). Study of thermally treated samples was done. VO2+ were found in V2O5 at 350 °C. VO2+ ions were incorporated to the GeO2 network after thermal treatment at 700 °C. From the results we propose that VO2+ acts as crystal former in these samples.

Download Full-text

Up-conversion fluorescence and electron spin resonance in Er3+-doped GeO2 heated gel prepared via a sol-gel process

Journal of Materials Science Letters ◽

10.1007/bf00278138 ◽

1995 ◽

Vol 14 (11) ◽

pp. 813-815 ◽

Cited By ~ 14

Author(s):

M. Yamazaki ◽

K. Kojima

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Sol Gel ◽

Spin Resonance ◽

Sol Gel Process

Download Full-text

Electron-spin-resonance (ESR) study of sol-gel glasses

Journal of Non-Crystalline Solids ◽

10.1016/0022-3093(85)90303-5 ◽

1985 ◽

Vol 71 (1-3) ◽

pp. 327-333 ◽

Cited By ~ 27

Author(s):

G. Kordas ◽

R.A. Weeks ◽

L.C. Klein

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Sol Gel ◽

Spin Resonance ◽

Gel Glasses

Download Full-text

Vanadium Ions in Sol-Gel Silica Studied by Electron Spin Resonance, UV-Visible Absorption, Diffuse Reflectance, and Photoluminescence Spectroscopies.

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.110.507 ◽

2002 ◽

Vol 110 (1282) ◽

pp. 507-511 ◽

Cited By ~ 2

Author(s):

Michiyo KAWASHIMA ◽

Nobuhiro ODA ◽

Yoshikuni UCHIDA ◽

Kazunori MATSUI

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Diffuse Reflectance ◽

Sol Gel ◽

Visible Absorption ◽

Spin Resonance ◽

Uv Visible ◽

Vanadium Ions

Download Full-text

Electron-Spin Resonance and other Spectroscopies used in Characterizing Sol-Gel Processing

MRS Proceedings ◽

10.1557/proc-73-461 ◽

1986 ◽

Vol 73 ◽

Cited By ~ 1

Author(s):

L. C. Klein ◽

G. Kordas

Keyword(s):

Molecular Structure ◽

Nuclear Magnetic Resonance ◽

Electron Spin Resonance ◽

Magnetic Resonance ◽

Electron Spin ◽

Esr Spectroscopy ◽

Sol Gel ◽

Spin Resonance ◽

Extrinsic Defects ◽

Gel Processing

ABSTRACTThe molecular structure of sol-gel processed silica can be studied using electron-spin resonance (ESR) spectroscopy. Spectra reveal changes in structure from sol to gel and from gel to glass. Gels prepared under various conditions contain intrinsic and extrinsic defects. Other spectroscopies that have been used to investigate gels are nuclear magnetic resonance (NMR), Raman, and visible.

Download Full-text