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Semiconductor and Material Spectroscopy Laboratory
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Thin Film growth and characterization of Ti doped ZnO by RF/DC magnetron sputtering
Year:
2014
Authors:
M. B. Haider, M. F. Al-Kuhaili, S. M. A. Durrani, S. Venkatesh, Iman Salem Roqan
Ti doped ZnO
Ferromagnetism in Gd doped ZnO nanowires: A first principles study
Year:
2014
Authors:
Assa Aravindh, Udo Schwingenschloegl, Iman Salem Roqan
Gd doped ZnO
Structural and magnetic properties of Gd-doped ZnO
Year:
2014
Authors:
Ioannis Bantounas, Venkatesh Singaravelu, Iman Salem Roqan, Udo Schwingenschloegl
Gd doped ZnO
Density Functional Theory
Vacancy complexes induce long-range ferromagnetism in GaN
Year:
2014
Authors:
Zhenkui Zhang, Udo Schwingenschloegl, Iman Salem Roqan
Vacancies
III-V semiconductors
Ferromagnetism
Density functional
Antiferromagnetism
Possible mechanism for d0 ferromagnetism mediated by intrinsic defects
Year:
2014
Authors:
Zhenkui Zhang, Udo Schwingenschloegl, Iman Salem Roqan
Zn vacancies
ZnS Nanostructures
Intrinsic Defects
Density Functional Theory
Excitonic localization in AlN-rich AlxGa1−xN/AlyGa1−yN multi-quantum-well grain boundaries
Year:
2014
ISSN:
0003-6951
Authors:
Idris A. Ajia, P. R. Edwards, Z. Liu, J.C. Yan, R.W. Martin, Iman Salem Roqan
Multiple Quantum Wells
Grain boundaries
Photoluminescence
Excitons
High optical and structural quality of GaN epilayers grown on
Year:
2014
Authors:
Mufasila Mumthaz Muhammed, M. Peres, Y. Yamashita, Y. Morishima, S. Sato, N. Franco, K. Lorenz, A. Kuramata, Iman Salem Roqan
III-V semiconductors
Epitaxy
X-Ray Diffraction
Photoluminescence
Neocellularization and neovascularization of nanosized bioactive glass-coated decellularized trabecular bone scaffolds
Year:
2013
Authors:
L-C. Gerhardt, K. L. Widdows, M. M. Erol, A. Nandakumar, Iman Salem Roqan, T. Ansari, A. R. Boccaccini
Decellularized Bone
Scaffold
Bioactive glass
Angiogenesis
Coating
Vascular endothelial growth factor
Stereology
Vascularisation
Hydrocarbon analysis using desorption atmospheric pressure chemical ionization
Year:
2013
Authors:
Fred P.M. Jjunju, Abraham K. Badu-Tawiah, Anyin Li, Santosh Soparawalla, Iman Salem Roqan, R. Graham Cooks
Ambient Ionization Mass Spectrometry
Petroleum Constituents
Charge Exchange
Ion-Molecule reactions
Polynuclear Aromatics
Fuels
In situ analysis of corrosion inhibitors using a portable mass spectrometer with paper spray ionization
Year:
2013
Authors:
Fred P.M. Jjunju, Anyin Li, Abraham K. Badu-Tawiah, Pu Wei, Linfan Li, Zheng Ouyang, Iman Salem Roqan, R. Graham Cooks
Mass Spectrometer
Corrosion Inhibitor
Sequential multiple-step europiumion implantation and annealing of GaN
Year:
2013
Authors:
S. M. C. Miranda, P. R. Edwards, K.P. O’Donnell, M. Bockowski, E. Alves, Iman Salem Roqan, A. Vantomme, K. Lorenz
Gallium Nitride
Ion Implantation
Crystal Quality
Europium
High pressure annealing of Europium implanted GaN
Year:
2012
Authors:
K. Lorenz, S. M. C. Miranda, E. Alves, Iman Salem Roqan, K.P. O’Donnell, M. Bockowski
GaN
Rare Earth Doping
Europium
Ion Implantation
Rutherford Backscattering Spectrometry
X-ray
Lineshape Engineering in an All-Pass Ring Resonator with Backreflection Coupled to a Symmetrical Fabry–Perot Resonator
Year:
2012
Authors:
Vasily A. Melnikov, Iman Salem Roqan
Coupled-mode theory (CMT)
Transfer functions
Resonator
The photoluminescence/excitation (PL/E) spectroscopy of Eu-implanted GaN
Year:
2011
Authors:
K.P. O’Donnell, Iman Salem Roqan, K. Wang, K. Lorenz, E. Alves, M. Bockowski
Gallium Nitride
Europium
Ion Implantation
Photoluminescence
Excitation Mechanism
The pro-angiogenic properties of multi-functional bioactive glass composite scaffolds
Year:
2011
Authors:
L-C. Gerhardt, K. L. Widdows, M. M. Erol, C. W. Burch, José, A. Sanz- Herrera, I. Ochoa, R. Stämpfli, Iman Salem Roqan, S. Gabe, T. Ansari, A. R. Boccaccini
Angiogenesis
Bioactive glass
Composite scaffold
Vascular endothelial growth factor
Bone
Vascularisation
Ab initio investigation on the magnetic ordering in Gd doped ZnO
Year:
2011
Authors:
Ioannis Bantounas, Souraya Goumri-Said, Mohammed Benali Kanoun, Aure´lien Manchon, Iman Salem Roqan, Udo Schwingenschloegl
Ferromagnetism
Magnetic semiconductors
Lattice site location of optical centers in GaN:Eu light emitting diode material grown by organometallic vapor phase epitaxy
Year:
2010
Authors:
K. Lorenz, E. Alves, Iman Salem Roqan, K.P. O’Donnell, A. Nishikawa, Y. Fujiwara, M. Bockowski
Photoluminescence
Doping
Light emitting diodes
III-V semiconductors
Identification of the prime optical center in GaN:Eu3+
Year:
2010
ISSN:
10
Authors:
Jjunju, Fred.P.M., Abraham.K.Badu-Tawiah, Anyin Li, And R. Graham Cooks, Iman S Roqan
Optics
GaN
Eu3+
Physics
Eu Doping of Zincblende GaN by Ion Implantation
Year:
2009
Authors:
K. Lorenz, Iman Salem Roqan, N. Franco, K.P. O’Donnell, V. Darakchieva, E. Alves, C. Trager-Cowan, R.W. Martin, D.J. As, M. Panfilova
III-V semiconductors
Rutherford backscattering
X-Ray Diffraction
Cathodoluminescence
Europium
gallium compounds
Ion Implantation
Lattice constants
wide band gap semiconductors
Optical and Structural Properties of Eu-implanted InxAl1-xN
Year:
2009
Authors:
I.S. Roqan, K.P. O’Donnell, C. Trager-Cowan, V. Matias, A. Vantomme
Photoluminescence
III-V semiconductors
Ion Implantation
Linewidths
Rutherford backscattering
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