Search results for "Selenide"
showing 10 items of 100 documents
Structural and vibrational study of Bi2Se3under high pressure
2011
The structural and vibrational properties of bismuth selenide (Bi${}_{2}$Se${}_{3}$) have been studied by means of x-ray diffraction and Raman scattering measurements up to 20 and 30 GPa, respectively. The measurements have been complemented with ab initio total-energy and lattice dynamics calculations. Our experimental results evidence a phase transition from the low-pressure rhombohedral ($R$-3$m$) phase (\ensuremath{\alpha}-Bi${}_{2}$Se${}_{3}$) with sixfold coordination for Bi to a monoclinic $C$2/$m$ structure (\ensuremath{\beta}-Bi${}_{2}$Se${}_{3}$) with sevenfold coordination for Bi above 10 GPa. The equation of state and the pressure dependence of the lattice parameters and volume …
Investigation of nitrogen-related acceptor centers in indium selenide by means of photoluminescence: Determination of the hole effective mass
1997
In this work we report on steady-state and time-resolved photoluminescence (PL) measurements in nitrogen-doped p-type indium selenide in the 33--210-K temperature range. In samples with low nitrogen concentration the photoluminescence spectrum consists of exciton-related peaks and a band-to-acceptor recombination peak (2.1-\ensuremath{\mu}s lifetime) with LO-phonon replica. An ionization energy of 65.5 meV is proposed for the nitrogen-related acceptor. A long-lived (18 \ensuremath{\mu}s) component, which consists of an asymmetric broadband centered around the acceptor peak, has been also detected by means of time-resolved PL. Samples with a higher nitrogen concentration show a PL spectrum t…
A Synthetic Route to 3-(Heteroaryl)-7-hydroxycoumarins Designed for Biosensing Applications
2014
A straightforward method to synthesize 3-(2-benzimidazolyl)-7-hydroxycoumarins, based on the condensation reaction of 7-acetoxy-3-formylcoumarin with various C- and/or N-substituted ortho-phenylenediamine derivatives is presented. This unusual approach proved particularly effective for introducing different hydrophilic groups (carboxylic or sulfonic acids or trimethylalkylammonium moieties) onto the heteroaryl scaffold, leading to cyan-green emitting coumarins that were both water-soluble and strongly fluorescent under physiological conditions. The further extension of this condensation reaction to bis(2-aminophenyl)diselenide enabled the first synthesis of 3-(2-benzoselenazolyl)-7-hydroxyc…
Electrical Resistivity Anisotropy of Silicon-Doped n-Indium Selenide
1993
CCDC 914200: Experimental Crystal Structure Determination
2012
Related Article: M.Seredyuk, V.A.Pavlenko, E.Gumienna-Kontecka, T.S.Iskenderov|2012|Acta Crystallogr.,Sect.E:Struct.Rep.Online|68|m1472|doi:10.1107/S1600536812045217
CCDC 821786: Experimental Crystal Structure Determination
2011
Related Article: M.Risto, T.Chivers, J.Konu|2011|Dalton Trans.|40|8238|doi:10.1039/c1dt10646e
CCDC 616223: Experimental Crystal Structure Determination
2007
Related Article: A.Laromaine, F.Teixidor, R.Kivekas, R.Sillanpaa, M.Arca, V.Lippolis, E.Crespo, C.Vinas|2006|Dalton Trans.||5240|doi:10.1039/b610944f
CCDC 616224: Experimental Crystal Structure Determination
2007
Related Article: A.Laromaine, F.Teixidor, R.Kivekas, R.Sillanpaa, M.Arca, V.Lippolis, E.Crespo, C.Vinas|2006|Dalton Trans.||5240|doi:10.1039/b610944f
CCDC 630894: Experimental Crystal Structure Determination
2011
Related Article: A.-R.Popescu, A.Laromaine, F.Teixidor, R.Sillanpaa, R.Kivekas, J.I.Llambias, C.Vinas|2011|Chem.-Eur.J.|17|4429|doi:10.1002/chem.201003330
CCDC 662703: Experimental Crystal Structure Determination
2008
Related Article: R.Venkateswaran, M.S.Balakrishna, S.M.Mobin, H.M.Tuononen|2007|Inorg.Chem.|46|6535|doi:10.1021/ic7005474