Abstract
PtPd nanoparticle superlattices were prepared at room temperature and investigated for their restructuring at elevated temperatures. the PtPd nanoparticles were spherical with a diameter of 3.5±0.3nm and were capped with surfactants of oleic acids and oleylamine. Images of the nanoparticle superlattices were taken using a transmission electron microscope. Analysis of the images with fast Fourier transform (FFT) revealed whether the superlattices were crystalline or amorphous. It was found that the critical temperature that induced a phase transition of PtPd superlattices from a crystalline state to an amorphous state fall in the range of 100-110 °C. Meanwhile, heat-induced restructuring transformed less-ordered superlattices into better-ordered ones, similar to annealing. It was especially pronounced for 3D superlattices, which also showed well-defined grain boundaries after restructuring. © 2009 IOP Publishing Ltd.
Recommended Citation
G. Ren and Y. Xing, "Temperature-induced Restructuring of Self-assembled PtPd Nanoparticle Superlattices," Nanotechnology, vol. 20, no. 46, article no. 465604, IOP Publishing, Nov 2009.
The definitive version is available at https://doi.org/10.1088/0957-4484/20/46/465604
Department(s)
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
1361-6528; 0957-4484
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 IOP Publishing, All rights reserved.
Publication Date
06 Nov 2009
