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Real-Time TEM Observation of the Role of Defects on Nickel Silicide Propagation in Silicon Nanowires.
ACS Nano
April 2024
Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, V94 T9PX Ireland.
Metal silicides have received significant attention due to their high process compatibility, low resistivity, and structural stability. In nanowire (NW) form, they have been widely prepared using metal diffusion into preformed Si NWs, enabling compositionally controlled high-quality metal silicide nanostructures. However, unlocking the full potential of metal silicide NWs for next-generation nanodevices requires an increased level of mechanistic understanding of this diffusion-driven transformation.
View Article and Find Full Text PDFGas-Phase Synthesis of Iron Silicide Nanostructures Using a Single-Source Precursor: Comparing Direct-Write Processing and Thermal Conversion.
J Phys Chem C Nanomater Interfaces
February 2024
Institute of Physics, Goethe University Frankfurt, Max-von-Laue-Str. 1, Frankfurt am Main 60323, Germany.
The investigation of precursor classes for the fabrication of nanostructures is of specific interest for maskless fabrication and direct nanoprinting. In this study, the differences in material composition depending on the employed process are illustrated for focused-ion-beam- and focused-electron-beam-induced deposition (FIBID/FEBID) and compared to the thermal decomposition in chemical vapor deposition (CVD). This article reports on specific differences in the deposit composition and microstructure when the (HSi)Fe(CO) precursor is converted into an inorganic material.
View Article and Find Full Text PDFRevealing Seed-Mediated Structural Evolution of Copper-Silicide Nanostructures: Generating Structured Current Collectors for Rechargeable Batteries.
Adv Mater
June 2024
Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, V94T9PX, Ireland.
Metal silicide thin films and nanostructures typically employed in electronics have recently gained significant attention in battery technology, where they are used as active or inactive materials. However, unlike thin films, the science behind the evolution of silicide nanostructures, especially 1D nanowires (NWs), is a key missing aspect. CuSi nanostructures synthesized by solvent vapor growth technique are studied as a model system to gain insights into metal silicide formation.
View Article and Find Full Text PDFMerging of Bi-Modality of Ultrafast Laser Processing: Heating of Si/Au Nanocomposite Solutions with Controlled Chemical Content.
Nanomaterials (Basel)
February 2024
Department of Optical Materials, Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic.
Ultrafast laser processing possesses unique outlooks for the synthesis of novel nanoarchitectures and their further applications in the field of life science. It allows not only the formation of multi-element nanostructures with tuneable performance but also provides various non-invasive laser-stimulated modalities. In this work, we employed ultrafast laser processing for the manufacturing of silicon-gold nanocomposites (Si/Au NCs) with the Au mass fraction variable from 15% (0.
View Article and Find Full Text PDFBulk Nanostructured Silicide Thermoelectric Materials by Reversible Hydrogen Absorption-Desorption.
Small
May 2024
Functional Materials, Institute of Materials Science, Technical University of Darmstadt, Alarich-Weiss-Straße 16, 64287, Darmstadt, Germany.
The production of bulk nanostructured silicide thermoelectric materials by a reversible hydrogen absorption-desorption process is demonstrated. Here, high-pressure reactive milling under 100 bar hydrogen is used to decompose the CaSi phase into CaH and Si. Subsequent vacuum heat treatment results in hydrogen desorption and recombination of the constituents into the original phase.
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