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Issue 9, 2016
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Structural evolution and mechanical behaviour of Pt nanoparticle superlattices at high pressure

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Abstract

High pressure is an effective means for tuning the interparticle distances of nanoparticle (NP) superlattices and thus for modifying their physical properties and functionalities. In this work, we determined the evolution of inter-NP distances of a Pt NP superlattice with increasing pressure using an in situ synchrotron small-angle X-ray scattering (SAXS) technique in a diamond-anvil cell (DAC). Transmission electron microscopy (TEM) was used to characterize the microstructures of pre- and post-compression samples. Our results demonstrate that the evolution of Pt NP assemblies with increasing pressure consists of four stages: (1) ligand elastic response, (2) uniform compression, (3) ligand detachment from NP surfaces, and (4) deviatoric compression of ligands between neighboring NPs. By controlling the magnitudes of applied pressure and deviatoric stress, one can sinter NPs into novel architectures such as nanowires and nanoceramics.

Graphical abstract: Structural evolution and mechanical behaviour of Pt nanoparticle superlattices at high pressure

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Publication details

The article was received on 24 Nov 2015, accepted on 05 Feb 2016 and first published on 05 Feb 2016


Article type: Paper
DOI: 10.1039/C5NR08291A
Citation: Nanoscale, 2016,8, 5214-5218
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    Structural evolution and mechanical behaviour of Pt nanoparticle superlattices at high pressure

    J. Zhu, Z. Quan, C. Wang, X. Wen, Y. Jiang, J. Fang, Z. Wang, Y. Zhao and H. Xu, Nanoscale, 2016, 8, 5214
    DOI: 10.1039/C5NR08291A

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