Calcination-Induced Phase Transformation and Accompanying Optical Luminescence of TiO2 Nanotubes: An X-ray Absorption Near-Edge Structures and X-ray Excited Optical Luminescence Study

2010 ◽  
Vol 114 (49) ◽  
pp. 21353-21359 ◽  
Author(s):  
Lijia Liu ◽  
Jeffrey Chan ◽  
Tsun-Kong Sham
Keyword(s):  
Phase Transformation ◽  
Tio2 Nanotubes ◽  
X Ray ◽  
Luminescence Study ◽  
Optical Luminescence ◽  
X Ray Absorption

VUV- and Soft X-Ray-Induced Optical Luminescence and X-Ray Absorption Fine Structures of Porous Silicon

1992 ◽  
Vol 281 ◽  
Author(s):  
T. K. Sham ◽  
D. T. Jiang ◽  
I. Coulthard ◽  
J. W. Lorimer ◽  
X. H. Feng ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Total Electron Yield ◽  
Total Electron ◽  
X Ray ◽  
Absorption Fine ◽  
Electron Yield ◽  
Optical Luminescence ◽  
Fine Structures ◽  
X Ray Absorption ◽  
Uv Excitation

ABSTRACTOptical luminescence in porous silicon induced by soft X-ray and vacuum UV excitation with energies in the vicinity of the Si K-edge (1838 eV) and the Si L-edge (99 eV) has been observed. The luminescence has been used, together with total electron yield, to record X-ray absorption fine structure (XAFS) in the near-edge region of both Si edges. The near- edge spectra recorded simultaneously with either luminescence or total electron yield were compared, and the implications of these measurements for the structure of porous silicon are discussed.

Optical Luminescence Yield X-ray Absorption Fine Structures at the Sulphur and Silicon K-edge

1993 ◽  
Vol 32 (S2) ◽  
pp. 223 ◽  
Author(s):  
T. K. Sham ◽  
X.-H. Feng ◽  
D.-T. Jiang ◽  
K. H. Tan ◽  
S. P. Frigo ◽  
...  
Keyword(s):  
X Ray ◽  
Absorption Fine ◽  
Optical Luminescence ◽  
Luminescence Yield ◽  
Fine Structures ◽  
X Ray Absorption

Extended x-ray absorption fine structure measurements of laser shocks in Ti and V and phase transformation in Ti

2004 ◽  
Vol 11 (5) ◽  
pp. 2688-2695 ◽  
Author(s):  
B. Yaakobi ◽  
D. D. Meyerhofer ◽  
T. R. Boehly ◽  
J. J. Rehr ◽  
B. A. Remington ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Fine Structure ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

The α → ω phase transformation in zirconium followed with ms-scale time-resolved X-ray absorption spectroscopy

2016 ◽  
Vol 36 (3) ◽  
pp. 237-249 ◽  
Author(s):  
A. Dewaele ◽  
R. André ◽  
F. Occelli ◽  
O. Mathon ◽  
S. Pascarelli ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Absorption Spectroscopy ◽  
Time Resolved ◽  
X Ray ◽  
Ω Phase ◽  
X Ray Absorption

Anisotropic x-ray absorption effects in the optical luminescence yield of ZnO nanostructures

2006 ◽  
Vol 89 (9) ◽  
pp. 093118 ◽  
Author(s):  
R. A. Rosenberg ◽  
G. K. Shenoy ◽  
L.-C. Tien ◽  
D. Norton ◽  
S. Pearton ◽  
...  
Keyword(s):  
Zno Nanostructures ◽  
X Ray ◽  
Optical Luminescence ◽  
Luminescence Yield ◽  
X Ray Absorption

Condensation of silicon nanowires from silicon monoxide by thermal evaporation — An X-ray absorption spectroscopy investigation

2007 ◽  
Vol 85 (10) ◽  
pp. 695-701 ◽  
Author(s):  
P -SG Kim ◽  
Y -H Tang ◽  
T K Sham ◽  
S T Lee
Keyword(s):  
Silicon Nanowires ◽  
Thermal Evaporation ◽  
Silicon Monoxide ◽  
Starting Material ◽  
Oxidation States ◽  
X Ray ◽  
Absorption Fine ◽  
Optical Luminescence ◽  
Fine Structures ◽  
X Ray Absorption

We report a Si K-edge X-ray absorption fine structures (XAFS) study of silicon monoxide (SiO), the starting material for silicon nanowire preparation, its silicon nanowires, and the residue after the preparation of the starting material. The silicon nanowires were condensed onto three different substrates, (i) the wall of the furnace quartz tube, (ii) a porous silicon substrate, and (iii) a Si(100) silicon wafer. It was found that the Si K-edge XAFS of SiO exhibits identifiable spectral features characteristic of Si in 0 and 4 oxidation states as well as in intermediate oxidation states, while the SiO residue primarily shows features of Si(0) and Si(4). The XAFS suggest that SiO is not exactly a simple mixture of Si and SiO2. The silicon nanowires produced by the process exhibit morphology and luminescence property variations that depend on the nature of the substrate. X-ray excited optical luminescence (XEOL) at the O K-edge suggests an efficient energy transfer to the optical decay channel. The results and their implications are discussed.Key words: silicon nanowires, thermal evaporation, silicon monoxide, X-ray absorption fine structures, X-ray excited optical luminescence.

scholarly journals Phase Transformation and Amorphization upon Alloys Magnesiation: Combining Operando X-Ray Diffraction and X-Ray Absorption Spectroscopy

2020 ◽  
Vol MA2020-01 (2) ◽  
pp. 194-194
Author(s):  
Lucie Blondeau ◽  
Eddy Foy ◽  
Stéphanie Belin ◽  
Suzy Surblé ◽  
Fabienne Testard ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption
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