Nanoparticles and Nanoalloy
Nanoparticles are important class of nanomaterials whose property can be turned by particle size, compositions, morphology, atomic structure and surface passivation. To develop bespoke applications, it is important to understand the structure-property relationship so that one can rationally design the required nanomaterials.
Related Projects and Collaborations
- Towards an Atomic-scale Understanding of the 3D Structures of Size-selected Clusters on Surfaces (York) Jun Yuan, University of York
- Towards an Atomic-scale Understanding of the 3D Structures of Size-selected Clusters on Surfaces (Birmingham) Ziyou Li, Roys L. Johnston and Richard Palmer, University of Birmingham
- Structures and Stabilities of Nanoscale Bimetallic Clusters Ziyou Li, University of Birmingham
Research Highlights
One-shot HAADF-STEM imaging of nanoclusters for 3D structural analysis
Ultrasmall nanoparticles or atomic clusters are structurally unstable and whose atomic structure can be modified by irradiation by an intense electron beam. One .
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Modeling Nanoscale Inhomogeneities for Quantitative HAADF STEM Imaging Richard Averyard, Riccard Fernando, Roy L. Johnston and Jun Yuan Phys. Rev. Lett. 113, 075501 (2014) Publisher's copy Realistic ab-initio HAADF-STEM image simulation of gold clusters, now surface atom vibration effect also included. |
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Three-dimensional atomic-scale structure of size-selected gold nanoclusters Z. Li, N. P. Young, M. Di Vece, S. Palomba, R. E. Palmer, A. L. Bleloch, B. C. Curley, R. L. Johnston, J. Liang, J. Yuan Nature 45, 46-49 (2008) Publisher's copy First experimental confirmation of the structure of size-selected dihedral gold clusters using high-angle annular dark field of scanning transmission electron microscopy |
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Nanoalloys
We have used the Z-contrast mechanism in HRTEM and HAADF-STEM imaging as well as EDX or EELS mapping to reveal the nanoscale chemistry in nanoalloys
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Understanding and controlling the structure and segregation behaviour of AuRh nanocatalysts L. Piccolo, Z. Y. Li, I. Demiroglu, F. Moyon, Z. Konuspayeva, G. Berhault, P. Afanasiev, W. Lefebvre, J. Yuan, R. L. Johnston Sci. Rep. 6, 35226 (2016) Publisher's copy (open access) Atomic scale imaging of phase segregation within AgRh catalytic nanoparticles on TiO2 support. |
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Observation of L1[sub 0]-like chemical ordering in a decahedral FePt nanoparticle by C[sub s]-corrected high-resolution transmission electron microscopy L. Xie, J. Zhu, Narayan, Poudyal, J. P. Liu and J. Yuan J. Appl. Phys. 105(7), 07A723 (2009) Publisher's copy Atomic scale imaging FePt ordered structure in ultrasmall nanoparticles. |
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