All Outputs (108)

Revealing the nature of low temperature photoluminescence peaks by laser treatment in van der Waals epitaxially grown WS2 monolayers (2018)
Journal Article
Orsi Gordo, V., Balanta, M., Galvão Gobato, Y., Covre, F., Galeti, H., Iikawa, F., Couto Jr., O., Qu, F., Henini, M., Hewak, D., & Huang, C. (in press). Revealing the nature of low temperature photoluminescence peaks by laser treatment in van der Waals epitaxially grown WS2 monolayers. Nanoscale, https://doi.org/10.1039/C8NR00719E

Monolayers of transition metal dichalcogenides (TMD) are promising materials for optoelectronics devices. However, one of the challenges is to fabricate large-scale growth of high quality TMD monolayers with the desired properties in order to expand... Read More about Revealing the nature of low temperature photoluminescence peaks by laser treatment in van der Waals epitaxially grown WS2 monolayers.

γ-rays irradiation effects on dielectric properties of Ti/Au/GaAsN Schottky diodes with 1.2%N (2018)
Journal Article
Teffahi, A., Hamri, D., Djeghlouf, A., Abboun Abid, M., Saidane, A., Al Saqri, N., …henini, M. (2018). γ-rays irradiation effects on dielectric properties of Ti/Au/GaAsN Schottky diodes with 1.2%N. Radiation Physics and Chemistry, 147, https://doi.org/10.1016/j.radphyschem.2018.01.029

Dielectric properties of As grown and irradiated Ti /Au/GaAsN Schottky diodes with 1.2%N are investigated using capacitance/conductance-voltage measurements in 90–290 K temperature range and 50–2000 kHz frequency range. Extracted parameters are inter... Read More about γ-rays irradiation effects on dielectric properties of Ti/Au/GaAsN Schottky diodes with 1.2%N.

Experimental evidences of quantum confined 2D indirect excitons in single barrier GaAs/AlAs/GaAs heterostructure using photocapacitance at room temperature (2018)
Journal Article
Bhunia, A., Singh, M. K., Galvao Gobato, Y., Henini, M., & Datta, S. (in press). Experimental evidences of quantum confined 2D indirect excitons in single barrier GaAs/AlAs/GaAs heterostructure using photocapacitance at room temperature. Journal of Applied Physics, 123(4), Article 044305. https://doi.org/10.1063/1.5007820

We investigated excitonic absorptions in a GaAs/AlAs/GaAs single barrier heterostructure using both photocapacitance and photocurrent spectroscopies at room temperature. Photocapacitance spectra show well defined resonance peaks of indirect excitons... Read More about Experimental evidences of quantum confined 2D indirect excitons in single barrier GaAs/AlAs/GaAs heterostructure using photocapacitance at room temperature.

Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method (2018)
Journal Article
Wasly, H., Abd El-Sadek, M., & Henini, M. (in press). Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method. Applied Physics A, 124(76), https://doi.org/10.1007/s00339-017-1482-4

Influence of synthesis temperature and reaction time on the structural and optical properties of ZnO nanoparticles synthesized by the hydrothermal method was investigated using X-ray diffraction (XRD), high resolution transmission electron microscopy... Read More about Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method.

Detailed investigation of defect states in Erbium doped In2O3 thin films (2017)
Journal Article
Henini, M., Ghosh, A., Dwivedi, S., Chakrabartty, S., & Mondala, A. (2018). Detailed investigation of defect states in Erbium doped In2O3 thin films. Materials Research Bulletin, 99, https://doi.org/10.1016/j.materresbull.2017.11.020

Erbium doped Indium Oxide (In2O3:Er) thin films (TFs) were synthesised by spin-on technique. Secondary Ion Mass Spectrometry confirmed that Er is incorporated into the In2O3 lattice and formed an In-O-Er layer. The current–voltage loop produced a low... Read More about Detailed investigation of defect states in Erbium doped In2O3 thin films.

Structural and Optical Properties of Diluted Magnetic Ga1−xMnxAs–AlAs Quantum Wells Grown on High-Index GaAs Planes (2017)
Journal Article
Gunes, M., Gumus, C., Galvao Gobato, Y., & Henini, M. (in press). Structural and Optical Properties of Diluted Magnetic Ga1−xMnxAs–AlAs Quantum Wells Grown on High-Index GaAs Planes. Bulletin of Materials Science, https://doi.org/10.1007/s12034-017-1487-9

We report on the structural and optical properties of Ga₁₋ᵪ Mn ᵪ As-AlAs quantum wells (QWs) with χ=0.1% grown by molecular beam epitaxy (MBE) on semi-insulating GaAs substrates with orientations (100), (110), (311)B and (411)B. Atomic force microsco... Read More about Structural and Optical Properties of Diluted Magnetic Ga1−xMnxAs–AlAs Quantum Wells Grown on High-Index GaAs Planes.

Novel multifunctional of magnesium ions (Mg++) incorporated calcium phosphate nanostructures (2017)
Journal Article
Thanigai Arul, K., Ramesh, M., Chennakesavan, C., Karthikeyan, V., Manikandan, E., Umar, A., …Henini, M. (2018). Novel multifunctional of magnesium ions (Mg++) incorporated calcium phosphate nanostructures. Journal of Alloys and Compounds, 730, https://doi.org/10.1016/j.jallcom.2017.09.254

Magnesium ions incorporated calcium phosphate was synthesized by wet chemical route and followed by microwave assisted method. XRD analysis was confirmed that the presence of calcium phosphate (hydroxyapatite). TEM analysis was exhibited rod-like mor... Read More about Novel multifunctional of magnesium ions (Mg++) incorporated calcium phosphate nanostructures.

Rare earth element (REE) lanthanum doped zinc oxide (La: ZnO) nanomaterials: synthesis structural optical and antibacterial studies (2017)
Journal Article
Manikandan, A., Manikandan, E., Meenatchi, B., Vadivel, S., Jaganathan, S., Ladchumananandasivam, R., …Aanand, J. S. (2017). Rare earth element (REE) lanthanum doped zinc oxide (La: ZnO) nanomaterials: synthesis structural optical and antibacterial studies. Journal of Alloys and Compounds, 723, https://doi.org/10.1016/j.jallcom.2017.06.336

Lanthanum (La) doped zinc oxide (ZnO) nanomaterials (LaxZn1-xO, x = 0.0, 0.03, 0.05, 0.07 M) were synthesized via co-precipitation method using zinc acetate, lanthanum nitrate as precursors, octylamine as capping and reducing agent. The structures, m... Read More about Rare earth element (REE) lanthanum doped zinc oxide (La: ZnO) nanomaterials: synthesis structural optical and antibacterial studies.

Impact of doping on the performance of p-type Be-doped Al0.29 Ga0.71As Schottky diodes (2017)
Journal Article
Henini, M. (in press). Impact of doping on the performance of p-type Be-doped Al0.29 Ga0.71As Schottky diodes. Modern Electronic Materials, 3(2), https://doi.org/10.1016/j.moem.2017.06.001

The effects of changing the acceptors concentration on the electrical characteristics of Au/Ti on Be-doped Al0.29Ga0.71As Schottky contact have been investigated in the temperature range of 100–400 K. Using three devices with three different doping l... Read More about Impact of doping on the performance of p-type Be-doped Al0.29 Ga0.71As Schottky diodes.

Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication (2017)
Journal Article
Thanigai Arul, K., Manikandan, E., Marmu, P., Kennedy, J., & Henini, M. (in press). Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication. Journal of Alloys and Compounds, 720, https://doi.org/10.1016/j.jallcom.2017.05.146

Polymer based nickel (Ni) and cobalt (Co) co-doped ferrites were prepared by adept ultrasonication route. Different concentrations of polymer [polyvinyl alcohol (PVA)] (0.2 g and 0.5 g) was added as a surfactant to the magnetic particles. The phase p... Read More about Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication.

Transition metal titanium (Ti) doped LaFeO3 nanoparticles for enhanced optical structural and magnetic properties (2017)
Journal Article
Sasikala, C., Durairaj, N., Baskaran, I., Sathyaseelan, B., Henini, M., & Manikandan, E. (2017). Transition metal titanium (Ti) doped LaFeO3 nanoparticles for enhanced optical structural and magnetic properties. Journal of Alloys and Compounds, 712, https://doi.org/10.1016/j.jallcom.2017.04.133

A series of LaFe1−xTixO3 (x = 0.0, 0.2, 0.4, 0.6 and 0.8) nanoparticles have been successfully synthesized by simple co-precipitation technique. The synthesized samples (calcined at 800° C/3hr) were characterised for structural, optical and magnetic... Read More about Transition metal titanium (Ti) doped LaFeO3 nanoparticles for enhanced optical structural and magnetic properties.

Fabrication of novel transparent Co3O4-TiO2 nanowires p-n heterojunction diodes for multiband photodetection applications (2017)
Journal Article
Choudhuri, B., Mondal, A., Dwivedi, S. M. M. D., & Henini, M. (2017). Fabrication of novel transparent Co3O4-TiO2 nanowires p-n heterojunction diodes for multiband photodetection applications. Journal of Alloys and Compounds, 712, https://doi.org/10.1016/j.jallcom.2017.04.068

Axial Co3O4 - TiO2 heterojunction nanowires (NWs) were synthesized by glancing angle deposition (GLAD) technique. The p-n heterojunction showed excellent rectification ratio of 2.26 × 102 at ± 3.4 V. The forward turn on voltage of 1.5 V in the dark w... Read More about Fabrication of novel transparent Co3O4-TiO2 nanowires p-n heterojunction diodes for multiband photodetection applications.

Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode (2017)
Journal Article
Srikanthreddy, D., Glavin, B., Poyser, C. L., Henini, M., Lehmann, D., Jasiukiewicz, C., …Kent, A. (in press). Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode. Physical Review Applied, 7(2), Article 024014. https://doi.org/10.1103/PhysRevApplied.7.024014

We study the generation of microwave electronic signals by pumping a (311) GaAs Schottky diode with compressive and shear acoustic phonons, generated by femtosecond optical excitation of an Al _lm transducer and mode conversion at the Al-GaAs interfa... Read More about Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode.

SiC polytypes and doping nature effects on electrical properties of ZnO-SiC Schottky diodes (2017)
Journal Article
Rebaoui, Z., Bouiajra, W., Abboun Abid, M., Saidane, A., Jameel, D., Henini, M., & Felix, J. (2017). SiC polytypes and doping nature effects on electrical properties of ZnO-SiC Schottky diodes. Microelectronic Engineering, 171, https://doi.org/10.1016/j.mee.2017.01.010

Electrical properties of ZnO/SiC Schottky diodes with two SiC polytypes and N and P doping are investigated. Characterization was performed through I–V and C–V–f measurements. Schottky barrier height (Φb), ideality factor (n), and series resistance (... Read More about SiC polytypes and doping nature effects on electrical properties of ZnO-SiC Schottky diodes.

Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO2 nanomaterials for antibacterial applications (2016)
Journal Article
Kasinathan, K., Kennedy, J., Elayaperumal, M., Henini, M., & Malik, M. (2016). Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO2 nanomaterials for antibacterial applications. Scientific Reports, 6(38064), https://doi.org/10.1038/srep38064

To photo-catalytically degrade RhB dye using solar irradiation, CeO2 doped TiO2 nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related... Read More about Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO2 nanomaterials for antibacterial applications.

Negative activation energy and dielectric signatures of excitons and excitonic Mott transitions in quantum confined laser structures (2016)
Journal Article
Bhunia, A., Bansal, K., Henini, M., Alshammari, M., & Datta, S. (in press). Negative activation energy and dielectric signatures of excitons and excitonic Mott transitions in quantum confined laser structures. Journal of Applied Physics, 120, Article 144304. https://doi.org/10.1063/1.4964850

Mostly, optical spectroscopies are used to investigate the physics of excitons, whereas their electrical evidences are hardly explored. Here, we examined a forward bias activated differential capacitance response of GaInP/AlGaInP based multi-quantum... Read More about Negative activation energy and dielectric signatures of excitons and excitonic Mott transitions in quantum confined laser structures.

Surface effects of vapour-liquid-solid driven Bi surface droplets formed during molecular-beam-epitaxy of GaAsBi (2016)
Journal Article
Steele, J., Lewis, R., Horvat, J., Nancarrow, M., Henini, M., Fan, D., …Salamo, G. (in press). Surface effects of vapour-liquid-solid driven Bi surface droplets formed during molecular-beam-epitaxy of GaAsBi. Scientific Reports, 6(28860), https://doi.org/10.1038/srep28860

Herein we investigate a (001)-oriented GaAs1−xBix/GaAs structure possessing Bi surface droplets capable of catalysing the formation of nanostructures during Bi-rich growth, through the vapourliquid-solid mechanism. Specifically, self-aligned “nanotra... Read More about Surface effects of vapour-liquid-solid driven Bi surface droplets formed during molecular-beam-epitaxy of GaAsBi.

Electrical performance of conducting polymer (SPAN) grown on GaAs with different substrate orientations (2016)
Journal Article
Jameel, D., Aziz, M., Felix, J., Al Saqri, N., Taylor, D., Albalawi, H., …Henini, M. (2016). Electrical performance of conducting polymer (SPAN) grown on GaAs with different substrate orientations. Applied Surface Science, 387, 228-236. https://doi.org/10.1016/j.apsusc.2016.06.097

This article reports the effect of n-type GaAs substrate orientation, namely (100), (311)A and (311)B, on the electrical properties of sulfonated polyaniline (SPAN)/GaAs heterojunction devices. In addition, the inhomogeneity of the interface between... Read More about Electrical performance of conducting polymer (SPAN) grown on GaAs with different substrate orientations.

Effect of Co-60 gamma-ray irradiation on electrical properties of Ti/Au/GaAs1-xNx Schottky diodes (2016)
Journal Article
Teffahi, A., Hamri, D., Mostefa, A., Saidane, A., Al Saqri, N., Felix, J., & Henini, M. (in press). Effect of Co-60 gamma-ray irradiation on electrical properties of Ti/Au/GaAs1-xNx Schottky diodes. Current Applied Physics, 16(8), https://doi.org/10.1016/j.cap.2016.05.003

Current-voltage (I-V), capacitance-voltage-frequency (C-V-f) and conductance-voltage-frequency (G/ω-V-f) measurements at room temperature are used to study 50 kGy 60Co γ-ray electrical properties irradiation dependence of Ti/Au/GaAs1−xNx Schottky dio... Read More about Effect of Co-60 gamma-ray irradiation on electrical properties of Ti/Au/GaAs1-xNx Schottky diodes.

Hole spin injection from a GaMnAs layer into GaAs-AlAs-InGaAs resonant tunneling diodes (2016)
Journal Article
Rodrigues, D., Brasil, M., Orlita, M., Kunc, J., Galeti, H., Henini, M., …H.V.A., Y. (2016). Hole spin injection from a GaMnAs layer into GaAs-AlAs-InGaAs resonant tunneling diodes. Journal of Physics D: Applied Physics, 49(16), https://doi.org/10.1088/0022-3727/49/16/165104

We have investigated the polarization-resolved electroluminescence (EL) of a p–i–n GaAs/AlAs/InGaAs resonant tunneling diode (RTD) containing a GaMnAs (x  =  5%) spin injector under high magnetic fields. We demonstrate that under hole resonant tunnel... Read More about Hole spin injection from a GaMnAs layer into GaAs-AlAs-InGaAs resonant tunneling diodes.