| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Baumberg, Jeremy J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Microlens Hollow-Core Fiber Probes for Operando Raman Spectroscopy.
- 2024Direct linearly polarized electroluminescence from perovskite nanoplatelet superlatticescitations
- 2023Multi-wavelength lock-in spectroscopy for extracting perturbed spectral responses: molecular signatures in nanocavities.
- 2022The effect of caesium alloying on the ultrafast structural dynamics of hybrid organic–inorganic halide perovskitescitations
- 2020Selective CO production from aqueous CO2 using a Cu96In4 catalyst and its integration into a bias-free solar perovskite-BiVO4 tandem device
- 2020Linear and nonlinear optical probing of various excitons in 2D inorganic-organic hybrid structurescitations
- 2019Scalable active plasmonic nano-pixels
- 2019Metasurfaces Atop Metamaterials: Surface Morphology Induces Linear Dichroism in Gyroid Optical Metamaterials.
- 2018Controlling Self-Assembly in Gyroid Terpolymer Films By Solvent Vapor Annealing.
- 2018Controlling Self-Assembly in Gyroid Terpolymer Films By Solvent Vapor Annealing.
- 2017Optical Imaging of Large Gyroid Grains in Block Copolymer Templates by Confined Crystallization.
- 2016A one-piece 3D printed flexure translation stage for open-source microscopycitations
- 2016In Situ Observations of Phase Transitions in Metastable Nickel (Carbide)/Carbon Nanocomposites.
- 2016A sub-femtojoule electrical spin-switch based on optically trapped polariton condensatescitations
- 2016A sub-femtojoule electrical spin-switch based on optically trapped polariton condensatescitations
- 2016In Situ Observations of Phase Transitions in Metastable Nickel (Carbide)/Carbon Nanocompositescitations
- 2016A sub-femtojoule electrical spin-switch based on optically trapped polariton condensates.
- 2015Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets
- 2014In situ intercalation dynamics in inorganic-organic layered perovskite thin films.
- 2014Exfoliation of self-assembled 2D organic-inorganic perovskite semiconductorscitations
- 2012Electrically conductive polymeric photonic crystalscitations
- 2009Relating SERS intensity to specific plasmon modes on sphere segment void surfacescitations
- 2008Fabrication of Nano-Structured Gold Arrays by Guided Self-assembly for Plasmonics
- 2007SERS at structured palladium and platinum surfacescitations
- 2006Surface enhanced Raman scattering using metal modified microstructured optical fiber substratescitations
- 2006Surface enhanced Raman scattering using metal modified microstructured optical fibre substratescitations
Places of action
| Organizations | Location | People |
|---|
article
In Situ Observations of Phase Transitions in Metastable Nickel (Carbide)/Carbon Nanocomposites
Abstract
Nanocomposite thin films comprised of metastable metal carbides in a carbon matrix have a wide variety of applications ranging from hard coatings to magnetics and energy storage and conversion. While their deposition using nonequilibrium techniques is established, the understanding of the dynamic evolution of such metastable nanocomposites under thermal equilibrium conditions at elevated temperatures during processing and during device operation remains limited. Here, we investigate sputter-deposited nanocomposites of metastable nickel carbide (Ni3C) nanocrystals in an amorphous carbon (a-C) matrix during thermal postdeposition processing via complementary in situ X-ray diffractometry, in situ Raman spectroscopy, and in situ X-ray photoelectron spectroscopy. At low annealing temperatures (300 °C) we observe isothermal Ni3C decomposition into face-centered-cubic Ni and amorphous carbon, however, without changes to the initial finely structured nanocomposite morphology. Only for higher temperatures (400–800 °C) Ni-catalyzed isothermal graphitization of the amorphous carbon matrix sets in, which we link to bulk-diffusion-mediated phase separation of the nanocomposite into coarser Ni and graphite grains. Upon natural cooling, only minimal precipitation of additional carbon from the Ni is observed, showing that even for highly carbon saturated systems precipitation upon cooling can be kinetically quenched. Our findings demonstrate that phase transformations of the filler and morphology modifications of the nanocomposite can be decoupled, which is advantageous from a manufacturing perspective. Our in situ study also identifies the high carbon content of the Ni filler crystallites at all stages of processing as the key hallmark feature of such metal–carbon nanocomposites that governs their entire thermal evolution. In a wider context, we also discuss our findings with regard to the much debated potential role of metastable Ni3C as a catalyst phase in graphene and carbon nanotube growth.