Explanipedia

UV-C irradiation-based inactivation of SARS-CoV-2 in contaminated porous and non-porous surfaces Open

Ana Luísa Tomás, Anna Reichel, Patrícia M. Silva, Pedro G. Silva, João L. Pinto , et al. · 2022

The SARS-CoV-2 pandemic emphasized effective cleaning and disinfection of common spaces as an essential tool to mitigate viral transmission. To address this problem, decontamination technologies based on UV-C light are being used. Our aim …

EXPLORING INNOVATIVE SCALE-UP SOLUTIONS FOR LIGHT INTEGRATION IN TEXTILES USING ELECTROLUMINESCENT FIBERS Open

N. Ben Sédrine, Amanda Melo, Albertino Goth, Nelson Durães, Ricardo Silva , et al. · 2022

In this work, we present our results on one-dimensional (1-D) light-emitting devices and their textile integration. Indeed, light integration in textiles is very challenging and thanks to their unique 1-D configuration for possible miniatu…

Exploring innovative scale-up solutions for light integration in textiles using electroluminescent fibres Open

N. Ben Sédrine, Amanda Melo, Albertino Goth, Nelson Durães, Ricardo Silva , et al. · 2022

In this work, we present our results on one-dimensional (1-D) light-emitting devices and their textile integration. Indeed, light integration in textiles is very challenging and thanks to their unique 1-D configuration for possible miniatu…

UV-C Irradiation-Based Inactivation of SARS-CoV-2 in Contaminated Porous and Non-Porous Surfaces Open

Ana Luísa Tomás, Anna Reichel, Patrícia M. Silva, Pedro G. Silva, João L. Pinto , et al. · 2022

Silver nanoparticle array on weakly interacting epitaxial graphene substrate as catalyst for hydrogen evolution reaction under neutral conditions Open

Ivan Shtepliuk, N. Pliatsikas, Jing‐Xin Jian, N. Ben Sédrine, Tihomir Iakimov , et al. · 2021

The paucity of research on hydrogen evolution reaction (HER) under neutral conditions, which is a more sustainable way to produce H2 compared to acidic and alkaline HER, encourages the development of efficient catalytic materials and devic…

The role of Ga and Bi doping on the local structure of transparent zinc oxide thin films Open

F.C. Correia, Joana M. Ribeiro, Alexei Kuzmin, Inga Pudza, Aleksandr Kalinko , et al. · 2021

Clustering and Morphology Evolution of Gold on Nanostructured Surfaces of Silicon Carbide: Implications for Catalysis and Sensing Open

Ivan Shtepliuk, Ivan G. Ivanov, N. Pliatsikas, Tihomir Iakimov, Samuel Lara‐Avila , et al. · 2021

A fundamental understanding of the behavior of gold (Au) nanostructures deposited on functional surfaces is imperative to discover and leverage interface-related phenomena that can boost the efficiency of existing electronic devices in sen…

Luminescent silver nanoclusters decorated on ZnO tetrapods: a detailed understanding of their role in photoluminescence features Open

J. Rodrigues, Charline Becker, N. Ben Sédrine, Marius Kamp, Lorenz Kienle , et al. · 2021

A detailed spectroscopic analysis of the AgNC@ZnO Tp hybrid is presented, together with a comparison of their properties with the AgNC and ZnO Tp independently, confirming the formation of a functional material.

Exploring swift-heavy ion irradiation of InGaN/GaN multiple quantum wells for green-emitters: the use of Raman and photoluminescence to assess the irradiation effects on the optical and structural properties Open

J. Cardoso, N. Ben Sédrine, Przemysław Jóźwik, Margaret Sequeira, Christian Wetzel , et al. · 2021

Xe SHI irradiation of InGaN/GaN MQWs leads to surface damage and intermixing at the interfaces. The introduced defects cause a strong quenching of the luminescence as well as a change in the excitation mechanisms.

Eu3+ optical activation engineering in Al Ga1-N nanowires for red solid-state nano-emitters Open

J. Cardoso, Gwénolé Jacopin, Djibril Faye, Alexandra-Madalina Siladie, B. Daudin , et al. · 2020

ZnAl2O4 decorated Al-doped ZnO tetrapodal 3D networks: microstructure, Raman and detailed temperature dependent photoluminescence analysis Open

J. Rodrigues, M. Hoppe, N. Ben Sédrine, Niklas Wolff, Viola Düppel , et al. · 2020

3D network of ZnO:Al tetrapods decorated with ZnAl₂O₄ particles were synthesised by FTS. Al-doping was confirmed by the broadening and shift of the peak position of the 14 K NBE emission and by the bandgap shift to hi…

Interplay between thin silver films and epitaxial graphene Open

Ivan Shtepliuk, Ivan G. Ivanov, N. Pliatsikas, N. Ben Sédrine, Olof Andersson , et al. · 2019

Modelling of Optical Damage in Nanorippled ZnO Produced by Ion Irradiation Open

A. Redondo‐Cubero, L. Vázquez, D. Jalabert, K. Lorenz, N. Ben Sédrine · 2019

Here, we report on the production of nanoripples on the surface of ZnO bulk substrates by ion beam erosion with 20 keV Ar+ ions at an oblique incidence (60°). The ripple patterns, analyzed by atomic force microscopy, follow a power law dep…

Eu activation in beta-Ga_2O_3 MOVPE thin films by ion implantation Open

M. Peres, Emilio Nogales, Bianchi Méndez, K. Lorenz, M. R. Correira , et al. · 2019

In this work, we have established the effects of Eu implantation and annealing on beta-Ga_2O_3 thin films grown by metal organic vapor phase epitaxy (MOVPE) on sapphire substrate. The study is based on the combined information from structu…

Probing surface states in C60decorated ZnO microwires: detailed photoluminescence and cathodoluminescence investigations Open

J. Rodrigues, Daria Smazna, N. Ben Sédrine, Emilio Nogales, Rainer Adelung , et al. · 2019

ZnO/C₆₀composites were studied by spectroscopic techniques, suggesting the possibility of controlling/tuning the emission outcome by changing the C₆₀amount on the ZnO surface.

Eu Activation inβ-Ga2O3MOVPE Thin Films by Ion Implantation Open

M. Peres, Emilio Nogales, Bianchi Méndez, K. Lorenz, M. R. Correia , et al. · 2019

In this work, we have established the effects of Eu implantation and annealing on β-Ga2O3 thin films grown by metal organic vapor phase epitaxy (MOVPE) on sapphire substrate. The study is based on the combined information from structural a…

Multiple optical centers in Eu-implanted AlN nanowires for solid-state lighting applications Open

J. Cardoso, N. Ben Sédrine, Annelise Kopp Alves, Manuel A. Martins, Matthias Belloeil , et al. · 2018

A detailed spectroscopic analysis of Eu3+ implanted and annealed AlN nanowires (NWs) grown by plasma-assisted molecular beam epitaxy is presented by using micro-Raman, temperature-dependent steady-state photoluminescence, and time-resolved…

Hierarchical Aerographite 3D flexible networks hybridized by InP micro/nanostructures for strain sensor applications Open

Irina Plesco, Julian Strobel, Fabian Schütt, Cameliu Himcinschi, N. Ben Sédrine , et al. · 2018

In the present work, we report on development of three-dimensional flexible architectures consisting of an extremely porous three-dimensional Aerographite (AG) backbone decorated by InP micro/nanocrystallites grown by a single step hydride…

Eu-Doped AlGaN/GaN Superlattice-Based Diode Structure for Red Lighting: Excitation Mechanisms and Active Sites Open

N. Ben Sédrine, J. Rodrigues, Djibril Faye, A.J. Neves, E. Alves , et al. · 2018

In this work, we have established the effects of postgrowth annealing and Eu implantation, followed by annealing on an AlGaN/GaN superlattice-based diode structure, containing Mg-doped GaN top p-cap layers. The study is based on the combin…

Fluctuating potentials in GaAs:Si nanowires: critical reduction of the influence of polytypism on the electronic structure Open

N. Ben Sédrine, R. Ribeiro-Andrade, Anders Gustafsson, M.R. Soares, J. Bourgard , et al. · 2018

The electronic structure of highly Si-doped GaAs NWs is ruled by fluctuating potentials: luminescence intensity increase and polytypism influence reduction.

Buckminsterfullerene hybridized zinc oxide tetrapods: defects and charge transfer induced optical and electrical response Open

Daria Smazna, J. Rodrigues, Sindu Shree, Vasile Postica, Gero Neubüser , et al. · 2018

ZnO tetrapods–C₆₀ based hybrid materials show interesting defect mediated optical and electrical responses which could be suitable for various applications.

Substrate and Mg doping effects in GaAs nanowires Open

P. Kannappan, N. Ben Sédrine, Jennifer P. Teixeira, M.R. Soares, Bruno P. Falcão , et al. · 2017

Mg doping of GaAs nanowires has been established as a viable alternative to Be doping in order to achieve p-type electrical conductivity. Although reports on the optical properties are available, few reports exist about the physical proper…

Structural and optical characterization of Gd_2SiO_5 crystalline fibres obtained by laser floating zone Open

F. Rey-García, N. Ben Sédrine, M.R. Soares, A.J.S. Fernandes, A.B. Lopes , et al. · 2017

Gadolinium oxyorthosilicate single crystals (Gd2(SiO4)O (GSO)) were obtained by the laser floating zone (LFZ) technique. The fibres were pulled at faster growth rates (10 mm/h) than those produced by the conventional Czochralski method and…

Nanosensors: Multifunctional Materials: A Case Study of the Effects of Metal Doping on ZnO Tetrapods with Bismuth and Tin Oxides (Adv. Funct. Mater. 6/2017) Open

Vasile Postica, Jorit Gröttrup, Rainer Adelung, Oleg Lupan, Abhishek Kumar Mishra , et al. · 2017

Hybrid nanostructures from metal oxides are promising for sensing applications. The synthesis of hybrid networks and single structures based on ZnO tetrapods (ZnO-T) with MexOy and ZnxMe1−xOy (Me = Bi and Sn) is described by Rainer Adelung…

Hybridization of Zinc Oxide Tetrapods for Selective Gas Sensing Applications Open

Oleg Lupan, Vasile Postica, Jorit Gröttrup, Abhishek Kumar Mishra, Nora H. de Leeuw , et al. · 2017

In this work, the exceptionally improved sensing capability of highly porous three-dimensional (3-D) hybrid ceramic networks toward reducing gases is demonstrated for the first time. The 3-D hybrid ceramic networks are based on doped metal…

Multifunctional Materials: A Case Study of the Effects of Metal Doping on ZnO Tetrapods with Bismuth and Tin Oxides Open

Vasile Postica, Jorit Gröttrup, Rainer Adelung, Oleg Lupan, Abhishek Kumar Mishra , et al. · 2016

Hybrid metal oxide nano‐ and microstructures exhibit novel properties, which make them promising candidates for a wide range of applications, including gas sensing. In this work, the characteristics of the hybrid ZnO‐Bi 2 O 3 and ZnO‐Zn 2 …

Quantum well intermixing and radiation effects in InGaN/GaN multi quantum wells Open

K. Lorenz, A. Redondo‐Cubero, Márcio B. Lourenço, Margaret Sequeira, M. Peres , et al. · 2016

Compositional grading of InGaN/GaN multi quantum wells (QWs) was proposed to mitigate polarization effects and Auger losses in InGaN-based light emitting diodes [K. P. O'Donnell et al., Phys. Status Solidi RRL 6 (2012) 49]. In this paper w…

Infrared dielectric functions and optical phonons of wurtzite YxAl1−xN (0 ⩽ x ⩽ 0.22) Open

N. Ben Sédrine, Agnė Žukauskaitė, Jens Birch, Jens Jensen, Lars Hultman , et al. · 2015

YAlN is a new member of the group-III nitride family with potential for applications in next generation piezoelectric and light emitting devices. We report the infrared dielectric functions and optical phonons of wurtzite (0001) YxAl1-xN e…

Photoluminescence studies of a perceived white light emission from a monolithic InGaN/GaN quantum well structure Open

N. Ben Sédrine, T. C. Esteves, J. Rodrigues, L. Rino, M. R. Correia , et al. · 2015

In this work we demonstrate by photoluminescence studies white light emission from a monolithic InGaN/GaN single quantum well structure grown by metal organic chemical vapour deposition. As-grown and thermally annealed samples at high temp…

Luminescence studies on green emitting InGaN/GaN MQWs implanted with nitrogen Open

Maria J P Sousa, T. C. Esteves, N. Ben Sédrine, J. Rodrigues, Márcio B. Lourenço , et al. · 2015

We studied the optical properties of metalorganic chemical vapour deposited (MOCVD) InGaN/GaN multiple quantum wells (MQW) subjected to nitrogen (N) implantation and post-growth annealing treatments. The optical characterization was carrie…

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