Exploring the Atomic Structure of 1.8 nm Monolayer-Protected Gold Clusters with Aberration-Corrected STEM
Liu, J., Jian, N., Ornelas, I., Pattison, A. J., Lahtinen, T., Salorinne, K., Häkkinen, H., & Palmer, R. E. (2017). Exploring the Atomic Structure of 1.8 nm Monolayer-Protected Gold Clusters with Aberration-Corrected STEM. Ultramicroscopy, 176, 146-150. https://doi.org/10.1016/j.ultramic.2016.11.021
© 2016 Elsevier B.V. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
Monolayer-protected (MP) Au clusters present attractive quantum systems with a range of potential applications e.g. in catalysis. Knowledge of the atomic structure is needed to obtain a full understanding of their intriguing physical and chemical properties. Here we employed aberration-corrected scanning transmission electron microscopy (ac-STEM), combined with multislice simulations, to make a round-robin investigation of the atomic structure of chemically synthesised clusters with nominal composition Au144(SCH2CH2Ph)60 provided by two different research groups. The MP Au clusters were “weighed” by the atom counting method, based on their integrated intensities in the high angle annular dark field (HAADF) regime and calibrated exponent of the Z dependence. For atomic structure analysis, we compared experimental images of hundreds of clusters, with atomic resolution, against a variety of structural models. Across the size range 123–151 atoms, only 3% of clusters matched the theoretically predicted Au144(SR)60 structure, while a large proportion of the clusters were amorphous (i.e. did not match any model structure). However, a distinct ring-dot feature, characteristic of local icosahedral symmetry, was observed in about 20% of the clusters. ...
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Electrocrystallization of Monolayer-Protected Gold Clusters : Opening the Door to Quality, Quantity, and New Structures Antonello, S.; Dainese, T.; Pan, Fangfang; Rissanen, Kari; Maran, F. (American Chemical Society, 2017)Thiolate-protected metal clusters are materials of ever-growing importance in fundamental and applied research. Knowledge of their single-crystal X-ray structures has been instrumental to enable advanced molecular understanding ...
Towards atomically precise supported catalysts from monolayer‐protected clusters : the critical role of the support Häkkinen, Hannu; Longo, Alessandro; de Boed, Ewoud; Mammen, Nisha; van der Linden, Marte; Honkala, Karoliina; de Jongh, Petra; Donoeva, Baira (Wiley-VCH Verlag, 2020)Controlling the size and uniformity of metal clusters with atomic precision is essential for fine‐tuning their catalytic properties, however for clusters deposited on supports such control is challenging. Here, by combining ...
Malola, Sami; Häkkinen, Hannu (Nature Publishing Group, 2021)Precise knowledge of chemical composition and atomic structure of functional nanosized systems, such as metal clusters stabilized by an organic molecular layer, allows for detailed computational work to investigate ...
Density functional studies of the electronic structure and catalytic properties of small bare and ligand-protected gold clusters Kacprzak, Katarzyna Anna (University of Jyväskylä, 2010)In this thesis, bare and thiolate-protected gold nanoclusters and thiolated polymeric gold, silver and copper complexes are computationally studied by using density functional codes GPAW (grid projector augmented wave) ...
Synthesis of photocleavable protected terminal alkynes for self-assembled monolayers and single molecule electronics Peltonen, Petra (2021)The theoretical part of the thesis introduces self-assembled monolayers, their applications in a view of organic electronics and usage of photocleavable protection groups. Alkanethiol SAMs on gold surface and their surface ...