2008
DOI: 10.1002/jrs.2028
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Raman spectroscopy and characterisation of α‐gallium oxyhydroxide and β‐gallium oxide nanorods

Abstract: Raman spectroscopy complemented by infrared spectroscopy was used to characterise both gallium oxyhydroxide (a-GaO(OH)) and gallium oxide (b-Ga 2 O 3 ) nanorods synthesised with and without the surfactants using a soft chemical methodology at low temperatures. Nano-to micro-sized gallium oxyhydroxide and gallium oxide materials were characterised and analysed by both X-ray diffraction and Raman spectroscopy. Rod-like GaO(OH) crystals with average length of ∼2.5 µm and width of 1.5 µm were obtained. Upon therma… Show more

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Cited by 90 publications
(60 citation statements)
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“…In addition to the above modes, the five other peaks at 125, 195, 247, 302 and 407 cm À1 were also observed. The presence of peaks at 195 and 407 cm À1 are corresponds to downshift of A g symmetry modes of Ga 2 O 3 [37] due to unavoidable surface oxidation states in InGaN nanopowders as it has a strong affinity to oxidation. Although, the Ga 2 O 3 phase is not observed in XRD, a very small amount of oxygen is present in the EDS measurement.…”
Section: Resultsmentioning
confidence: 96%
“…In addition to the above modes, the five other peaks at 125, 195, 247, 302 and 407 cm À1 were also observed. The presence of peaks at 195 and 407 cm À1 are corresponds to downshift of A g symmetry modes of Ga 2 O 3 [37] due to unavoidable surface oxidation states in InGaN nanopowders as it has a strong affinity to oxidation. Although, the Ga 2 O 3 phase is not observed in XRD, a very small amount of oxygen is present in the EDS measurement.…”
Section: Resultsmentioning
confidence: 96%
“…Alignment of all crystals in a similar orientation has been attempted and achieved. However, the differences in intensity observed may be due to minor differences in the crystal orientation 23–32, 36–41…”
Section: Methodsmentioning
confidence: 87%
“…Meanwhile, the GPN o glass exhibits low band intensities related to asymmetric (PO 3 2− ) vibrations of Q 1 entities as well as symmetric and asymmetric stretching of the Q 2 phosphate tetrahedron respectively peaking at 1100 cm −1 , 1170 cm −1 and 1200 cm −1 . While the main contributions at 640 cm −1 and 980 cm −1 are respectively assigned to [GaO 4 ] − stretching vibrations and symmetric (PO 4 3− ) stretching in Q 0 phosphate entity. These both main contributions emphasizes a majority of Q 0 phosphate entities surrounded by sodium ions or gallium in tetrahedral sites [GaO 4 ] − .…”
Section: Resultsmentioning
confidence: 99%
“…,28 as well as symmetric and asymmetric stretching of the Q 2 phosphate tetrahedron22,24,26,28 respectively peaking at 1100 cm −1 , 1170 cm −1 and 1200 cm −1 . While the main contributions at 640 cm −1 and 980 cm −1 are respectively assigned to [GaO 4 ] − stretching vibrations[24][25][26][29][30][31] and sym-…”
mentioning
confidence: 99%