Batra, N. M., Mahalingam, D. K., Doggali, P., Nunes, S. P. & Costa, P. M. F. J. (2022) Investigating the thermal stability of metallic and non-metallic nanoparticles using a novel graphene oxide-based transmission electron microscopy heating-membrane. Nanotechnology, 33 255701.
Added by: Richard Baschera (2022-04-29 14:16:55) Last edited by: Richard Baschera (2022-04-29 14:19:16) |
Type de référence: Article DOI: 10.1088/1361-6528/ac547c Numéro d'identification (ISBN etc.): 0957-4484 Clé BibTeX: Batra2022 Voir tous les détails bibliographiques |
Catégories: HORSIMN, INTERNATIONAL Créateurs: Batra, Costa, Doggali, Mahalingam, Nunes Collection: Nanotechnology |
Consultations : 1/308
Indice de consultation : 9% Indice de popularité : 2.25% |
Liens URLs https://doi.org/10.1088/1361-6528/ac547c |
Résumé |
In recent years, graphene has been explored as a heating membrane for studying high-temperature dynamics inside the transmission electron microscope (TEM) due to several limitations with the existing silicon nitride-based membrane. However, the transfer of monolayer graphene films for TEM experiments is challenging and requires many complicated steps with a minimum success rate. This work developed a novel in situ heating platform by combining the graphene oxide (GO) flakes in the pre-patterned chips. The isolated GO flake was self-suspended between the metal electrodes by a simple drop-casting process. The GO was reduced and characterized using Raman and electron energy-loss spectroscopy. Furthermore, a GO-based heater was used to investigate the thermal stability of gold and silica nanoparticles. The gold nanoparticles evaporated non-uniformly and left an empty carbon shell, while silica disappeared uniformly by etching carbon support. We successfully demonstrated a GO flake as a heating membrane to study high temperature thermal dynamic reactions: melting/evaporation, agglomeration, Rayleigh instability, and formation/or removal of carbon in the nanoparticles.
|
Notes |
Publisher: IOP Publishing
|