All Outputs (76)

The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals (2016)
Journal Article
Mudd, G., Molas, M., Chen, X., Zólyomi, V., Nogajewski, K., Kudrynskyi, Z. R., …Patanè, A. (2016). The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals. Scientific Reports, 6(1), Article 39619. https://doi.org/10.1038/srep39619

The electronic band structure of van der Waals (vdW) layered crystals has properties that depend on the composition, thickness and stacking of the component layers. Here we use density functional theory and high field magneto-optics to investigate th... Read More about The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals.

High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe (2016)
Journal Article
Bandurin, D. A., Tyurnina, A. V., Yu, G. L., Mishchenko, A., Zólyomi, V., Morozov, S. V., …Cao, Y. (2017). High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe. Nature Nanotechnology, 12(3), 223-227. https://doi.org/10.1038/nnano.2016.242

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These dif... Read More about High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe.

Excitonic mobility edge and ultra-short photoluminescence decay time in n-type GaAsN (2016)
Journal Article
Eßer, F., Winner, S., Patanè, A., Helm, M., & Schneider, H. (in press). Excitonic mobility edge and ultra-short photoluminescence decay time in n-type GaAsN. Applied Physics Letters, 109(18), Article 182113. https://doi.org/10.1063/1.4966949

We use time-resolved photoluminescence (PL) spectroscopy to study the recombination dynamics in Si-doped GaAsN semiconductor alloys with a nitrogen content up to 0.2%. The PL decay is predominantly monoexponential and exhibits a strong energy dispers... Read More about Excitonic mobility edge and ultra-short photoluminescence decay time in n-type GaAsN.

Developing Mn-doped lead sulfide quantum dots for MRI labels (2016)
Journal Article
Turyanska, L., Moro, F., Patanè, A., Barr, J., Köckenberger, W., Taylor, A., …Thomas, N. R. (2016). Developing Mn-doped lead sulfide quantum dots for MRI labels. Journal of Materials Chemistry B, 4(42), 6797-6802. https://doi.org/10.1039/c6tb02574a

Magnetic interactions of Mn2+ions in lead sulfide (PbS) nanocrystals with protons in water are probed by NMR and MRI. A thin layer of capping molecules enables free solvent diffusion to the nanocrystal surface resulting in a decrease of proton relaxa... Read More about Developing Mn-doped lead sulfide quantum dots for MRI labels.

Quantum confinement and photoresponsivity of ?-In2Se3 nanosheets grown by physical vapour transport (2016)
Journal Article
Balakrishnan, N., Staddon, C. R., Smith, E. F., Stec, J., Gay, D., Mudd, G. W., …Beton, P. H. (in press). Quantum confinement and photoresponsivity of β-In2Se3 nanosheets grown by physical vapour transport. 2D Materials, 3(2), 1-8. https://doi.org/10.1088/2053-1583/3/2/025030

We demonstrate that β-In2Se3 layers with thickness ranging from 2.8 – 100 nm can be grown on SiO2/Si, mica and graphite using a physical vapour transport method. The β-In2Se3 layers are chemically stable at room temperature and exhibit a blue-shift o... Read More about Quantum confinement and photoresponsivity of ?-In2Se3 nanosheets grown by physical vapour transport.

Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire (2016)
Journal Article
Beardsley, R., Akimov, A. V., Greener, J. D., Mudd, G. W., Sandeep, S., Kudrynskyi, Z. R., …Kent, A. J. (2016). Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire. Scientific Reports, 6, https://doi.org/10.1038/srep26970

Van der Waals (vdW) layered crystals and heterostructures have attracted substantial interest for potential applications in a wide range of emerging technologies. An important, but often overlooked, consideration in the development of implementable d... Read More about Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire.

Phonon-Assisted Resonant Tunneling of Electrons in Graphene–Boron Nitride Transistors (2016)
Journal Article
Vdovin, E. E., Mishchenko, A., Greenaway, M., Zhu, M., Ghazaryan, D., Misra, A., …Eaves, L. (2016). Phonon-Assisted Resonant Tunneling of Electrons in Graphene–Boron Nitride Transistors. Physical Review Letters, 116(18), Article 186603. https://doi.org/10.1103/PhysRevLett.116.186603

We observe a series of sharp resonant features in the differential conductance of graphene-hexagonal boron nitride-graphene tunnel transistors over a wide range of bias voltages between 10 and 200 mV. We attribute them to electron tunneling assisted... Read More about Phonon-Assisted Resonant Tunneling of Electrons in Graphene–Boron Nitride Transistors.

Resonant tunnelling between the chiral Landau states of twisted graphene lattices (2015)
Journal Article
Greenaway, M., Vdovin, E. E., Mishchenko, A., Makarovsky, O., Patanè, A., Wallbank, J., …Eaves, L. (2015). Resonant tunnelling between the chiral Landau states of twisted graphene lattices. Nature Physics, 11(12), 1057-1062. https://doi.org/10.1038/nphys3507

A class of multilayered functional materials has recently emerged in which the component atomic layers are held together by weak van der Waals forces that preserve the structural integrity and physical properties of each layer. An exemplar of such a... Read More about Resonant tunnelling between the chiral Landau states of twisted graphene lattices.

Electron spin coherence near room temperature in magnetic quantum dots (2015)
Journal Article
Moro, F., Turyanska, L., Wilman, J., Fielding, A. J., Fay, M. W., Granwehr, J., & Patanè, A. (2015). Electron spin coherence near room temperature in magnetic quantum dots. Scientific Reports, 5, Article 10855. https://doi.org/10.1038/srep10855

We report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn 2+ spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix.... Read More about Electron spin coherence near room temperature in magnetic quantum dots.

High Broad-Band Photoresponsivity of Mechanically Formed InSe-Graphene van der Waals Heterostructures (2015)
Journal Article
Mudd, G. W., Svatek, S. A., Hague, L., Makarovsky, O., Kudrynskyi, Z. R., Mellor, C. J., …Patanè, A. (2015). High Broad-Band Photoresponsivity of Mechanically Formed InSe-Graphene van der Waals Heterostructures. Advanced Materials, 27(25), 3760-3766. https://doi.org/10.1002/adma.201500889

We exploit the broad-band transparency of graphene and the favorable band line up of graphene with van der Waals InSe crystals to create new functional heterostructures and high-performance photodetectors. The InSe-graphene heterostructure exhibits a... Read More about High Broad-Band Photoresponsivity of Mechanically Formed InSe-Graphene van der Waals Heterostructures.

Spin manipulation and spin-lattice interaction in magnetic colloidal quantum dots (2014)
Journal Article
Moro, F., Turyanska, L., Granwehr, J., & Patanè, A. (2014). Spin manipulation and spin-lattice interaction in magnetic colloidal quantum dots. Physical review B: Condensed matter and materials physics, 90(20), Article 205428. https://doi.org/10.1103/PhysRevB.90.205428

We report on the spin-lattice interaction and coherent manipulation of electron spins in Mn-doped colloidal PbS quantum dots (QDs) by electron spin resonance. We show that the phase memory time,TM, is limited by Mn–Mn dipolar interactions, hyperfine... Read More about Spin manipulation and spin-lattice interaction in magnetic colloidal quantum dots.

Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions (2014)
Journal Article
Balakrishnan, N., Kudrynskyi, Z. R., Fay, M. W., Mudd, G. W., Svatek, S. A., Makarovsky, O., …Patanè, A. (2014). Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions. Advanced Optical Materials, 2(11), 1064-1069. https://doi.org/10.1002/adom.201400202

Room temperature electroluminescence from semiconductor junctions is demonstrated. The junctions are fabricated by the exfoliation and direct mechanical adhesion of InSe and GaSe van der Waals layered crystals. Homojunction diodes formed from layers... Read More about Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions.

Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals (2014)
Journal Article
Turyanska, L., Hill, R. J. A., Makarovsky, O., Moro, F., Knott, A. N., Larkin, O. J., …Curry, R. J. (2014). Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals. Nanoscale, 6(15), 8919-8925. https://doi.org/10.1039/c4nr02336f

We report on PbS colloidal nanocrystals that combine within one structure solubility in physiological solvents with near-infrared photoluminescence, and magnetic and optical properties tuneable by the controlled incorporation of magnetic impurities (... Read More about Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals.

Subterahertz chaos generation by coupling a superlattice to a linear resonator (2014)
Journal Article
Hramov, A., Makarov, V., Koronovskii, A., Kurkin, S., Gaifullin, M., Alexeeva, N., …Balanov, A. (2014). Subterahertz chaos generation by coupling a superlattice to a linear resonator. Physical Review Letters, 112(116603), https://doi.org/10.1103/PhysRevLett.112.116603

We investigate the effects of a linear resonator on the high-frequency dynamics of electrons in devices exhibiting negative differential conductance. We show that the resonator strongly affects both the dc and ac transport characteristics of the devi... Read More about Subterahertz chaos generation by coupling a superlattice to a linear resonator.

Apoferritin-encapsulated PbS quantum dots significantly inhibit growth of colorectal carcinoma cells (2013)
Journal Article
Bradshaw, T. D., Junor, M., Patanè, A., Clarke, P., Thomas, N. R., Li, M., …Turyanska, L. (2013). Apoferritin-encapsulated PbS quantum dots significantly inhibit growth of colorectal carcinoma cells. Journal of Materials Chemistry B, 45, 6254-6260. https://doi.org/10.1039/c3tb21197e

Colorectal carcinoma (CRC) is the 3rd most common cancer worldwide, thus development of novel therapeutic strategies is imperative. Herein potent, selective dose-dependent antitumor activity of horse spleen apoferritin encapsulated PbS quantum dots (... Read More about Apoferritin-encapsulated PbS quantum dots significantly inhibit growth of colorectal carcinoma cells.

Band-gap profiling by laser writing of hydrogen-containing III-N-Vs (2012)
Journal Article
Balakrishnan, N., Pettinari, G., Makarovsky, O., Turyanska, L., Fay, M. W., De Luca, M., …Patanè, A. (2012). Band-gap profiling by laser writing of hydrogen-containing III-N-Vs. Physical review B: Condensed matter and materials physics, 86(15), Article 155307. https://doi.org/10.1103/PhysRevB.86.155307

We show that the dissociation of the N-H complex in hydrogenated III-N-Vs can be laser activated at temperatures that are significantly smaller than those (>200°C) required for thermal dissociation due to a resonant photon absorption by the N-H compl... Read More about Band-gap profiling by laser writing of hydrogen-containing III-N-Vs.