Journal
NATURE MATERIALS
Volume 14, Issue 12, Pages 1236-1244Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4409
Keywords
-
Categories
Funding
- Swedish Research Council
- Chalmers Area of Advance Nano Science
- Swedish Foundation for Strategic Research Framework Program [RMA11-0037]
- Polish National Science Center [2012/07/D/ST3/02152]
- ERC-StG 'SIMONE' [337221]
- Chalmers Area of Advance Materials Science
- European Research Council (ERC) [337221] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Physicochemical properties of nanoparticles may depend on their size and shape and are traditionally assessed in ensemble-level experiments, which accordingly may be plagued by averaging effects. These effects can be eliminated in single-nanoparticle experiments. Using plasmonic nanospectroscopy, we present a comprehensive study of hydride formation thermodynamics in individual Pd nanocrystals of different size and shape, and find corresponding enthalpies and entropies to be nearly size- and shape-independent. The hysteresis observed is significantly wider than in bulk, with details depending on the specifics of individual nanoparticles. Generally, the absorption branch of the hysteresis loop is size-dependent in the sub-30 nm regime, whereas desorption is size- and shape-independent. The former is consistent with a coherent phase transition during hydride formation, influenced kinetically by the specifics of nucleation, whereas the latter implies that hydride decomposition either occurs incoherently or via different kinetic pathways.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available