Transmission electron microscopic and small angle X-ray diffraction investigations of Au55(PPh3)12Cl6 microcrystals†

Schmid, Günter; Pugin, Raphaël; Sawitowski, Thomas; Simon, Ulrich; Marler, Β.

doi:10.1039/a902741f

Cited by 49 publications

(36 citation statements)

References 10 publications

(8 reference statements)

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“…This agrees fully with the observed distances in three-dimensional cluster crystals. [3] The value of 2.3 nm seems to Figure 2. TEM image of a hexagonally ordered area of Au 55 clusters with a thiol-modified cyclodextrin 1 as amphiphile Figure 3.…”

Section: Resultsmentioning

confidence: 94%

A New Approach to Well-Ordered Quantum Dots

Schmid

Beyer

2000

Eur. J. Inorg. Chem.

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Extended ordered monolayers of ligand stabilized Au55 clusters are formed at the phase boundary between water and dichloromethane. The water phase, containing amphiphilic molecules like per‐6‐deoxy‐6‐thio‐α‐cyclodextrin (1) or poly(vinylpyrrolidone) (2), is covered by a thin film of a solution of [Au55(PPh3)12Cl6] in dichloromethane. The interaction of the cluster molecules with the thiol functions of 1 or the polymer chains of 2 form perfect cluster orders of hexagonal and cubic structure. The monolayers can be transferred onto solid substrates by a simple dipping process. The use of carbon coated copper grids allows the investigation of the monolayers by transmission electron microscopy (TEM). Electron diffraction experiments under a microscope prove the hexagonal and cubic arrangements. The reason for the formation of the one or the other modification is still unknown.

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Section: Resultsmentioning

confidence: 94%

A New Approach to Well-Ordered Quantum Dots

Schmid

Beyer

2000

Eur. J. Inorg. Chem.

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“…Careful tuning of crystallization conditions have yielded crystallites of micrometer dimensions consisting of Au 55 nanocrystals and Fe-Pt alloy nanocrystals (4.5 nm) [118,119]. However, it was observed that the nanocrystal arrangement in all the above crystallites was polymorphous.…”

Section: Giant Nanocrystalsmentioning

confidence: 97%

Physical and Chemical Properties of Nano‐Sized Metal Particles

Rao

Kulkarni

Thomas

2004

Metal–Polymer Nanocomposites

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“…Careful tuning of crystallization conditions has yielded crystallites of micrometer dimensions consisting of Au 55 nanocrystals and FeaPt alloy nanocrystals (4.5 nm) as shown in Figure 4.22 [151,152]. Micron-sized crystals consisting of TOPO capped CdSe nanocrystals have previously been obtained by the groups of Bawendi and Weller [125,153].…”

Section: Colloidal Crystalsmentioning

confidence: 99%