Article
Chemistry, Physical
Reyhaneh Toufanian, Margaret Chern, Victoria H. Kong, Allison M. Dennis
Summary: The study investigates the impact of core composition, shell composition, and shell thickness on the optical properties of semiconductor nanocrystal quantum dots, revealing the ability to produce brightness-matched green and red emitters by adjusting the thickness of the ZnSe shell.
CHEMISTRY OF MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jie Dai, Yinlong Zhu, Yu Chen, Xue Wen, Mingce Long, Xinhao Wu, Zhiwei Hu, Daqin Guan, Xixi Wang, Chuan Zhou, Qian Lin, Yifei Sun, Shih-Chang Weng, Huanting Wang, Wei Zhou, Zongping Shao
Summary: This study presents the design of a Pt-containing complex oxide that utilizes atomic-scale hydrogen spillover to promote H-2 evolution electrocatalysis in acidic media. Experimental and theoretical calculations reveal the hydrogen evolution pathway and mechanism facilitated by hydrogen spillover, demonstrating the excellent performance and enhanced durability of the complex oxide catalyst compared to commercial ones.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Huimin Liu, Kezhi Li, Xin Zhang, Bing Liu, Lehua Qi, Xuemin Yin
Summary: Tapered nitrogen-doped SiC nanowires were grown vertically on carbon cloth using Si, SiO2, C, and dicyandiamide powders as raw materials via Fe-assisted chemical vapor deposition. The nanowires exhibited a high-density tapered morphology with increasing diameter from 120 nm to 1.30 μm and lengths of up to tens of micrometers. They were identified as 2H/3C-SiC mixed crystals and the tapered shape was influenced by the catalyst droplet, suggesting a Fe-assisted VLS mechanism. The PL spectrum showed a blue shift at 474 nm due to the special shape, defects, heterostructure, and quantum confinement effect of the nanowires.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Mikelis Marnauza, Robin Sjokvist, Sebastian Lehmann, Kimberly A. A. Dick
Summary: Environmental transmission electron microscopy is used to study the growth of Au nanoparticle seeded GaSb nanowires in situ. It is found that the precursor V/III ratio affects the morphology, composition, and diameter of the nanowires. The observed trends can be reproduced in a conventional exsitu system, highlighting the transferability and importance of the results obtained in situ.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Yongliang Zhang, Jing Cai, Xizhang Wang, Junyu Lei, Qiang Wu, Zheng Hu, Zehua Zhao
Summary: This study successfully synthesized large scale gamma-MnS nanorods with completely pure <002> growth direction and provided solid evidence using X-ray diffraction method, opening a new avenue for further exploration of their anisotropic properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jeanne Becdelievre, Xin Guan, I Dudko, Philippe Regreny, Nicolas Chauvin, Gilles Patriarche, Michel Gendry, Alexandre Danescu, Jose Penuelas
Summary: In this study, ultralong GaAs nanowires were successfully grown by vapor-liquid-solid method. The research revealed two features in terms of growth kinetic and structural properties. Firstly, a non-classical growth mode with attenuated axial growth rate was observed. Secondly, structural defects were found at the surface of Wurtzite segments located at the bottom of the nanowires. These phenomena were explained as a result of a specific pathway of the group V species in ultralong nanowires. In addition, the optical properties of the ultralong nanowires were studied using photoluminescence experiments.
Article
Materials Science, Multidisciplinary
Philipp Storm, Susanne Selle, Holger von Wenckstern, Marius Grundmann, Michael Lorenz
Summary: Transparent, p-type semiconductor copper iodide (CuI) thin films were grown via pulsed laser deposition on SrF2(111) using water soluble sacrificial layers of sodium bromide (NaBr). The resulting CuI thin films are single crystalline with reduced surface roughness compared to epitaxial CuI grown with rotational domains on other templates. The CuI thin films were subsequently transferred onto glass using epoxy/glue and dissolution of NaBr in a water-vapor atmosphere.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Nicolas Forrer, Arianna Nigro, Gerard Gadea, Ilaria Zardo
Summary: Nanowires have attracted significant attention as building blocks for functional devices at the nanoscale. In this study, the growth kinetics of silicon and germanium nanowires synthesized by chemical vapor deposition using a vapour-liquid-solid growth method catalyzed by gold were examined. The effects of temperature, partial pressure of the precursor gas, and different carrier gases on the growth rate were analyzed. Optimal conditions for nucleation in the nanowire growth process were identified.
Article
Physics, Multidisciplinary
Eduard V. Monaico, Veaceslav V. Ursaki, Ion M. Tiginyanu
Summary: This paper discusses three different types of microstructures as substrates for electrochemical deposition of Au nanodots. The uniform deposition of Au nanodots with controlled density was successfully achieved by adjusting adjustable parameters, and the morphology of the produced hybrid microarchitectures was investigated using scanning electron microscopy. These microstructures are proposed as platforms for the development of complex 3D hybrid micro-nano-architectures with Au nanodots as catalysts.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Materials Science, Ceramics
Hui Chen, Yulei Zhang, Yanqin Fu, Jian Zhang, Kang Shuai
Summary: This paper proposes a method to synthesize single-phase (Hf0.84Ta0.16)C solid solution nanowires using catalyst-assisted chemical vapor deposition for the first time. The growth direction and mechanism of (Hf0.84Ta0.16)C solid solution nanowires are discussed, and the application range of ceramic nanowires is expanded.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Patrick Runge, Sten Seifert
Summary: A generalized parameter set for In1-x-yAlyGaxAs compound semiconductors has been derived, allowing the modeling of wavelength-dependent refractive index and absorption in the near-infrared and short-wave infrared wavelength regime.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Thomasina Zaengle, Enrique Martinez, Thomas W. Hawkins, Colin McMillen, John Ballato
Summary: The flux assisted molten core method is used to fabricate crystalline selenide and phosphide cores. The introduction of a flux reduces the temperature and vapor pressure of the alloy melt, allowing for successful fabrication of these volatile materials.
Article
Engineering, Electrical & Electronic
Takuya Okimoto, Hideki Yagi, Koji Ebihara, Kouichiro Yamazaki, Satoru Okamoto, Yusuke Ohkura, Kazuhiko Horino, Munetaka Kurokawa, Masaru Takechi, Mitsuru Ekawa, Yoshihiro Yoneda
Summary: This paper presents the performance of an InP-based butt-joint coupled waveguide photodiode (PD) for 100 GBaud coherent detection, achieving a high responsivity of 0.90 A/W and a wide 3 dB bandwidth of 71 GHz. A compact photonic integrated circuit (PIC) chip has been fabricated to realize compact coherent modules without complicated assembly processes, demonstrating receiver performance sufficient for 100 GBaud coherent detection.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Tamaghna Chowdhury, Chetna Taneja, Aastha Vasdev, Prasenjit Ghosh, Goutam Sheet, G. V. Pavan Kumar, Atikur Rahman
Summary: Recent experimental observation shows that introducing Eshelby twist in Germanium sulfide (GeS) nanowires can achieve ferroelectric order at room temperature, overcoming the limitation of inversion symmetry in monochalcogenides. This discovery is expected to have applications in various fields.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Joseph Fridlander, Fengqiao Sang, Victoria Rosborough, Fabrizio Gambini, Simone Tommaso Suran-Brunelli, Jeffrey R. Chen, Kenji Numata, Mark Stephen, Larry A. Coldren, Jonathan Klamkin
Summary: An indium phosphide photonic integrated circuit (PIC) was used for integrated path differential absorption lidar of atmospheric carbon dioxide (CO2). The PIC demonstrated high frequency stability and absorption line sampling capability.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Miika Mattinen, Farzan Gity, Emma Coleman, Joris F. A. Vonk, Marcel A. Verheijen, Ray Duffy, Wilhelmus M. M. Kessels, Ageeth A. Bol
Summary: This study demonstrates the successful deposition of controlled-thickness two-dimensional transition metal dichalcogenides films at extremely low temperatures using plasma-enhanced atomic layer deposition. The crystallinity and electrical properties of the films were systematically characterized, and it was found that the deposition conditions and plasma chemistry played a crucial role in determining the film characteristics. The capability of depositing the films on flexible substrates further highlights the potential of this process in flexible device applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
A. Li, H. I. T. Hauge, M. A. Verheijen, E. P. A. M. Bakkers, R. T. Tucker, L. Vincent, C. Renard
Summary: Recently, the growth of hexagonal Si and SiGe nanowire branches on a wurtzite substrate has been demonstrated, which holds great potential for silicon technology. The vapor-liquid-solid growth mode was used and the process was confirmed by in situ transmission electron microscopy. It was also shown that the composition of the nanowire branches can be tuned and Si and SiGe heterostructures can be achieved.
Article
Chemistry, Multidisciplinary
Job J. C. Struijs, Valery Muravev, Marcel A. Verheijen, Emiel J. M. Hensen, Nikolay Kosinov
Summary: The catalytic conversion of CO2 to valuable chemicals is a promising solution to counteract the negative effects of increasing CO2 concentration. In this study, Co/CeO2 was explored as a catalyst for the methanation of diluted CO2 streams, showing excellent performance at low reaction temperatures and CO2 partial pressures. Mechanistic understanding of this activity was gained through in situ spectroscopic techniques, revealing the importance of the cobalt-ceria interface in enhancing catalytic activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Ghada Badawy, Marcel A. Verheijen, Erik P. A. M. Bakkers
Summary: The perfect interface between nanowires and superconductors can lead to an overly strong coupling that metalizes the nanowire. Adding an insulating shell, such as cadmium telluride (CdTe), between the nanowire and superconductor can reduce this coupling. The growth of epitaxial, defect-free CdTe on indium antimonide (InSb) nanowires and high-quality superconductor deposition at cryogenic temperatures demonstrates the potential of these shells to modulate the coupling between nanowires and superconductors.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marco Rossi, Ghada Badawy, Zhi-Yuan Zhang, Guang Yang, Guo-An Li, Jia-Yu Shi, Roy L. M. Op Het Veld, Sasa Gazibegovic, Lu Li, Jie Shen, Marcel A. Verheijen, Erik P. A. M. Bakkers
Summary: This paper presents a method for synthesizing free-standing InSb nanostructures on mismatched substrates and investigates their properties. The morphology of the nanostructures depends on the relative arrangement of two nanowires, with type I and type II nanostructures exhibiting promising transport properties for quantum devices. This platform can be used to selectively deposit superconductors and fabricate InSb-superconductor hybrid devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Dima Sadek, Antoine Jay, Jihan El Hila, Quentin Gravelier, Alexandre Arnoult, Remi Demoulin, Filadelfo Cristiano, Sebastien Plissard, Anne Hemeryck
Summary: The integration of Bi1-xSbx topological insulator on GaAs was studied experimentally and theoretically on (001) and (111)A surfaces. Different growth modes were observed, with Volmer Weber for GaAs(001) and Stranski-Krastanov for GaAs (111)A. First principles calculations supported these observations, showing that Bi atoms on the (001) surface diffuse more easily and form isolated islands, promoting a 3D growth. On the (111)A surface, Bi atoms diffuse less and prefer to bond directly with GaAs, leading to the formation of a wetting layer before a further Stranski-Krastanov growth.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Renee T. M. van Limpt, Marek Lavorenti, Marcel A. Verheijen, Mihalis N. Tsampas, Mariadriana Creatore
Summary: In this study, a plasma-enhanced atomic layer deposition (ALD) process was developed to fabricate nickel cobalt oxide thin films with excellent catalytic activity for the oxygen evolution reaction (OER). The crystal structure and chemical composition of the films were found to significantly influence electrical conductivity and electrocatalytic performance. Therefore, controlling the composition and structure of nickel cobalt oxide using ALD offers a promising approach to enhance its electrocatalytic performance.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Chemistry, Multidisciplinary
Johanna (Sanne) H. Deijkers, Arthur A. de Jong, Miika J. Mattinen, Jeff J. P. M. Schulpen, Marcel A. Verheijen, Hessel Sprey, Jan Willem Maes, Wilhelmus (Erwin) M. M. Kessels, Ageeth A. Bol, Adriaan J. M. Mackus
Summary: Miniaturization in integrated circuits requires scaling down the Cu diffusion barriers between metal lines and dielectric material. This study demonstrates that MoS2 synthesized by atomic layer deposition (ALD) can be used as a Cu diffusion barrier, offering enhanced dielectric lifetime and improved device performance. By further reducing the thickness, ALD MoS2 films can be applied as ultrathin Cu diffusion barriers.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Jason Jung, Sander G. Schellingerhout, Orson A. H. van der Molen, Wouter H. J. Peeters, Marcel A. Verheijen, Erik P. A. M. Bakkers
Summary: Heteroepitaxy enables the engineering of novel properties, however, the growth of flat defect-free thin films is hampered by the formation of three-dimensional islands. In this study, a distinct growth mode in molecular beam epitaxy of PbTe on InP was reported, where early nucleation forms islands analogous to the Volmer-Weber growth mode, but film closure exhibits a flat surface with atomic terracing. The final film is single crystalline due to a reorientation process occurring during island coalescence, allowing high-quality heteroepitaxy despite the large lattice mismatch and difference in crystal structures of PbTe and InP.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
S. Xu, Y. Li, M. A. Verheijen, E. R. Kieft, E. J. D. Vredenbregt
Summary: In this paper, the irradiation damage caused by Rb+ ions on silicon is studied using a prototype rubidium FIB. The experimental results show a duplex damage layer consisting of an outer layer of oxidation without Rb and an inner layer containing Rb mostly at the interface to the underlying Si substrate. The steady-state damage layer is measured to be 23.2(+/- 0.3) nm thick with a rubidium staining level of 7(+/- 1) atomic percentage.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2023)
Article
Chemistry, Multidisciplinary
Sander. G. G. Schellingerhout, Roberto Bergamaschini, Marcel. A. A. Verheijen, Francesco Montalenti, Leo Miglio, Erik P. A. M. Bakkers
Summary: Selective area growth of Pb1-xSnxTe islands and nanowires is demonstrated, and their in-depth growth dynamics and faceting are analyzed. The material is confirmed to be single-crystalline and defect-free, with homogeneous Pb/Sn ratio in the nanowires. {110} directions are identified as the optimal candidate for the growth of high-quality and straight Pb1-xSnxTe nanowires, enabling the design of complex networks.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Thomas J. Kools, Youri L. W. van Hees, Kenneth Poissonnier, Pingzhi Li, Beatriz Barcones Campo, Marcel A. Verheijen, Bert Koopmans, Reinoud Lavrijsen
Summary: Synthetic ferrimagnets based on Co and Gd show potential for bridging the gap between volatile information in the photonic domain and nonvolatile information in the magnetic domain. This study focuses on the time-evolution of the magnetic moment and compensation temperature of Pt/Co/Gd trilayers with different capping layers. The results reveal significant changes in the magnetic moment and compensation temperature due to quenching of the Gd magnetization, primarily caused by intermixing of the capping layer and Gd.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Silke A. Peeters, Ciaran T. Lennon, Marc J. M. Merkx, Robert H. Hadfield, W. M. M. (Erwin) Kessels, Marcel A. Verheijen, Harm C. M. Knoops
Summary: This work demonstrates that ultrathin superconducting TaCxN1-x films can be prepared using plasma-enhanced atomic layer deposition (PEALD) with substrate biasing. The ion-energy control enables tuning of the composition, improves film quality, and shows clear dependence of the critical temperature of superconductivity on ion energy.
APPLIED PHYSICS LETTERS
(2023)
Article
Energy & Fuels
Nga Phung, Dong Zhang, Cristian van Helvoirt, Michael Verhage, Marcel Verheijen, Valerio Zardetto, Frennie Bens, Christ H. L. Weijtens, L. J. (Bart) Geerligs, W. M. M. Kessels, Bart Macco, Mariadriana Creatore
Summary: This study demonstrates a perovskite/silicon tandem solar cell based on the industrially dominant PERC technology, and compared the performance of ITO/2PACz and ITO/NiO/2PACz structures. The addition of ALD NiO in the ITO/NiO/2PACz structure improves the device performance and stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Lavinia Calvi, Ryan van Zandvoort, Luc Leufkens, Janique F. B. Hupperetz, Roberto Habets, Daniel Mann, Nicole Meulendijks, Marcel A. Verheijen, Ken Elen, An Hardy, Marlies K. Van Bael, Pascal Buskens
Summary: The switching performance of W/VO2 nanoparticles in thermochromic glass laminates was investigated. Wet bead milling was used to reduce the particle size and prepare thermo-chromic films, which were applied for laminating glass plates. The impact of nanoparticle size and concentration on the resulting optical properties of the laminate was studied.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
