Raman spectra of amorphous Al2O3 and Al2O3/MoO3 obtained by visible and infrared excitation

Mortensen, A.; Christensen, D. H.; Nielsen, O. Faurskov; Pedersen, E.

doi:10.1002/jrs.1250220109

Cited by 64 publications

(15 citation statements)

References 7 publications

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“…Further, one can expect to see non-totally symmetric vibrations also, although they are expected to be weak in resonance Raman spectra, and they are easily classified by depolarization ratios of at least 3/4. 12 We observed almost all of the major bands of PF, CV and EV to have depolarization ratios less than 3/4 and a function of the excitation wavelength, as expected for simultaneous A-term enhancement via two nondegenerate states, the R and B bands discussed in Ref.…”

Section: Methodssupporting

confidence: 82%

Resonance Raman study of solvent effects on a series of triarylmethane dyes

Lueck

Daniel

McHale

1993

J Raman Spectroscopy

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Resonance Raman spectroscopy was used to address questions concerning the influence of the solvent on the structure and aggregation state of a series of triarylmethane dye, These molecules are of interest owing to the dramatic solvent effects exhibited in their optical absorption spectra, which have recently been interpreted in terms of intermolecular interactions which perturb the D, symmetry of the cationic dyes. Raman spectra of parafuchsin, malachite green, crystal violet and ethyl violet were compared in various solvents, in order to explore changes in the vibrational modes brought about by aggregation (in water), ion-pair formation (in non-polar solvents) and iondipole interactions (in polar solution). In triply amino-substituted dyes, the data point to the possibility that a resonance structure exists having a positive charge on one of the three nitrogens. It is discussed how the resulting reduction in the expected D, symmetry of the cation affects the resonance Raman spectrum.

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Section: Methodssupporting

confidence: 82%

Resonance Raman study of solvent effects on a series of triarylmethane dyes

Lueck

Daniel

McHale

1993

J Raman Spectroscopy

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“…Generally, aluminum oxide exists in several crystalline phases. Of these, g-Al 2 O 3 with Fd 3 m (cubic) space group does not exhibit any active Raman modes [20]. But, a-Al 2 O 3 with R 3 c space group exhibits seven Raman active phonon modes: 2 A 1g (418, 648 cm À1 ) and 5 E g (332, 431, 450, 526 and 745 cm À1 ) [21].…”

Section: Coating Characterizationmentioning

confidence: 96%

Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

Barshilia

Selvakumar

Vignesh

et al. 2009

Solar Energy Materials and Solar Cells

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“…As discussed by Aminzadeh and other authors (Mortensen et al . 1991), the broad band centred at about 1300 cm −1 and the two sharp bands at 1360 and 1390 cm −1 do not appear at the anti‐Stokes side of the Raman spectrum, so they are fluorescence bands, whose origin is due to Fe 3+ impurity.…”

Section: Resultsmentioning

confidence: 56%

A Micro‐raman and Internal Microstratigraphic Study of Ceramic Sherds From the Kilns of the Medici Castle at Cafaggiolo*

et al. 2011

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Nine representative sherds from the old (14th-16th century) kilns at the Castle of Cafaggiolo in Tuscany have been analysed by means of internal microstratigraphic analyses and micro-Raman spectroscopy and classified as follows: six engobed and glazed fragments, of which three are covered with an opaque white, decorated layer, one is marbleized, and two are engobed. The surface of the two engobed sherds, fragments of unfinished products, indicates that at least two firing processes were used. Two samples show characteristics of Byzantine pottery, and three of them can be classified as Islamic ware or maiolica, whilst the other one displays intermediate characteristics. The variety of ceramic wares indicates the presence of craftsmen with differing expertise, and suggests that part of their work was dedicated to experimentation on new ceramic production techniques.

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Raman spectra of amorphous Al₂O₃ and Al₂O₃/MoO₃ obtained by visible and infrared excitation

Cited by 64 publications

References 7 publications

Resonance Raman study of solvent effects on a series of triarylmethane dyes

Resonance Raman study of solvent effects on a series of triarylmethane dyes

Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

A Micro‐raman and Internal Microstratigraphic Study of Ceramic Sherds From the Kilns of the Medici Castle at Cafaggiolo*

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