Reza R. Zamani

University of Göttingen

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Jordi Arbiol

Institut Català de Nanociència i Nanotecnologia

J.R. Morante

Universitat de Barcelona

Andreu Cabot

Institut de Recerca en Energia de Catalunya

Kimberly A. Dick

Lund University

María Ibáñez

Institute of Science and Technology Austria

Doris Cadavid

Universidad Nacional de Colombia

Anna Fontcuberta i Morral

École Polytechnique Fédérale de Lausanne

Alexey Shavel

Institut de Recerca en Energia de Catalunya

Teresa Andreu

Universitat de Barcelona

Fredrik S. Hage

University of Oslo

Cooperative Institutions

École Polytechnique Fédérale de Lausanne

Universitat de Barcelona

Institut de Recerca en Energia de Catalunya

Lund University

Centre National de la Recherche Scientifique

Instituto de Ciencia de Materiales de Sevilla

Institut Català de Nanociència i Nanotecnologia

Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona

Consejo Superior de Investigaciones Científicas

Chinese Academy of Sciences

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Solution-growth and optoelectronic properties of ZnO:Cl@ZnS core–shell nanowires with tunable shell thickness

Journal of Alloys and Compounds (2012)

Jiandong Fan Cristian Fàbrega Reza R. Zamani Alexey Shavel Frank Güell

10.1016/j.jallcom.2012.11.166

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Citations (25)

Extreme streamflow drought in the Karkheh river basin (Iran): probabilistic and regional analyses

Natural Hazards (2014)

Reza R. Zamani Hossein Tabari Patrick Willems

Quantile

Return period

Natural hazard

10.1007/s11069-014-1492-x

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Citations (37)

Nanowires: Realization of Wurtzite GaSb Using InAs Nanowire Templates (Adv. Funct. Mater. 28/2018)

Advanced Functional Materials (2018)

Luna Namazi Louise Gren Malin Nilsson Magnus Garbrecht Claes Thelander

This cover, by Reza R. Zamani, depicts the radial heterointerface of a novel wurtzite InAs-GaSb core-shell nanowire system, a p-n nano-junction. The heterointerface is visualized at the atomic scale by means of aberration-corrected scanning transmission electron microscopy, revealing one atomic bilayer of mixed material between InAs core to GaSb shell. In article number 1800512, Luna Namazi, Reza R. Zamani, and co-workers investigate the properties of this nanowire system.

Wurtzite crystal structure

Template

Realization (probability)

10.1002/adfm.201870188

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Citations (0)

Insight on the fine structure of semiconductor nanowires down to single atom detection: correlation to their physical properties

European Microscopy Congress 2016: Proceedings (2016)

Jordi Arbiol Aziz Genç Reza R. Zamani Marı́a de la Mata

Nanotechnology allows modifying the structure of nanoobjects down to the atomic scale. Low dimensional quantum structures can be embedded in a nanowire system in order to modify its properties at will. Electronic and optoelectronic devices benefit from the new advances in growth methodologies, with a fine control of the elemental species locally deposited. In the present work, we will present how an accurate knowledge on the atomic positions, down to single atom detection, may help to deeply understand the improved properties of our complex nanowire heterostructures. We will show how from scanning transmission electron microscopy (STEM), it is possible to obtain precise 3D atomic models that can be used as input for the simulation of its physical properties. Finally, these theoretical properties will be cross‐correlated to the experimental measurements obtained locally on our nanowire systems. Some of the presented works will include: the effect of the isotope distribution on the phononic behavior of nanowires, the measurement of the internal electric fields in quantum structures and the influence of doping on the compensation of the polarization field, or the influence of polarity and the atomic arrangement on the photonic and electronic properties of single heterostructured nanowires.

Atomic units

10.1002/9783527808465.emc2016.5193

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Self-Assembled GaN Nanowires on Diamond

Nano Letters (2012)

Fabian Schuster Florian Furtmayr Reza R. Zamani César Magén J.R. Morante

We demonstrate the nucleation of self-assembled, epitaxial GaN nanowires (NWs) on (111) single-crystalline diamond without using a catalyst or buffer layer. The NWs show an excellent crystalline quality of the wurtzite crystal structure with m-plane faceting, a low defect density, and axial growth along the c-axis with N-face polarity, as shown by aberration corrected annular bright-field scanning transmission electron microscopy. X-ray diffraction confirms single domain growth with an in-plane epitaxial relationship of (10 ̅10)(GaN) [parallel] (01 ̅1)(Diamond) as well as some biaxial tensile strain induced by thermal expansion mismatch. In photoluminescence, a strong and sharp excitonic emission reveals excellent optical properties superior to state-of-the-art GaN NWs on silicon substrates. In combination with the high-quality diamond/NW interface, confirmed by high-resolution transmission electron microscopy measurements, these results underline the potential of p-type diamond/n-type nitride heterojunctions for efficient UV optoelectronic devices.

Wurtzite crystal structure

Faceting

Vicinal

10.1021/nl203872q

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Citations (77)

Spatio-temporal analysis of daily, seasonal and annual precipitation concentration in Jharkhand state, India

Stochastic Environmental Research and Risk Assessment (2017)

Reza R. Zamani Rasoul Mirabbasi Mohammad Nazeri Tahroudi Sarita Gajbhiye Meshram Farshad Ahmadi

Trend analysis

10.1007/s00477-017-1447-3

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Citations (80)

Polarity-driven polytypic brachning in Cu-based quanternary chalcogenide nanostructures

Reza R. Zamani Lothar Houben María Ibáñez Joan Daniel Prades Jordi Arbiol

Polarity (international relations)

Source

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Control of the doping concentration, morphology and optoelectronic properties of vertically aligned chlorine-doped ZnO nanowires

Acta Materialia (2011)

Jiandong Fan Alexey Shavel Reza R. Zamani Cristian Fàbrega Jean Rousset

Morphology

Ammonium chloride

Crystal (programming language)

10.1016/j.actamat.2011.07.037

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Citations (61)

Enhanced Photovoltaic Performance of Nanowire Dye-Sensitized Solar Cells Based on Coaxial TiO₂@TiO Heterostructures with a Cobalt(II/III) Redox Electrolyte

ACS Applied Materials & Interfaces (2013)

Jiandong Fan Cristian Fàbrega Reza R. Zamani Yan Hao Andres Parra‐Puerto

The growth of a TiO shell at the surface of TiO2 nanowires (NWs) allowed us to improve the power conversion efficiency of NW-based dye-sensitized solar cells (DSCs) by a factor 2.5. TiO2@TiO core–shell NWs were obtained by a two-step process: First, rutile-phase TiO2 NWs were hydrothermally grown. Second, a hongquiite-phase TiO shell was electrochemically deposited at the surface of the TiO2 NWs. Bare TiO2 and heterojunction TiO2@TiO NW-based DSCs were obtained using a cobalt(II/III) redox electrolyte and LEG4 as the dye. With this electrolyte/dye combination, DSCs with outstanding Voc values above 900 mV were systematically obtained. While TiO2@TiO NW-based DSCs had slightly lower Voc values than bare TiO2 NW-based DSCs, they provided 3-fold higher photocurrents, overall reaching 2.5-fold higher power conversion efficiencies. The higher photocurrents were associated with the larger surface roughness and an enhanced charge-carrier separation/transfer at the NW/dye interface.

Rutile

10.1021/am402344d

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Citations (23)

Streamflow trend analysis by considering autocorrelation structure, long-term persistence, and Hurst coefficient in a semi-arid region of Iran

Theoretical and Applied Climatology (2016)

Reza R. Zamani Rasoul Mirabbasi Sajjad Abdollahi Deepak Jhajharia

Trend analysis

Hurst exponent

Statistic

10.1007/s00704-016-1747-4

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Citations (94)