Geordnete zweidimensionale Monolagen von Au55-Clustern

Abstract

Einfaches Tauchen Polyethylenimin‐modifizierter Oberflächen in wässrige Lösungen säurefunktionalisierter Au55‐Cluster liefert zweidimensionale hexagonale und kubische Anordnungen dieser Cluster. Das Bild zeigt die transmissionselektronenmikroskopische Aufnahme einer kubischen Anordnung; die Kantenlänge entspricht 10 nm.

Growth of Platinum Clusters via Addition of Pt(II) Complexes: A First Principles Investigation

“…The mechanisms through which metal clusters and colloids form in solution have received a great deal of attention in recent years. − This is due to the importance of achieving an accurate control of the nucleation and growth processes, which is necessary to produce clusters of uniform size , and shape and can be employed for the production of self-assembled particle arrays with peculiar electronic and optical properties. − Moreover, the controlled, selectively heterogeneous metal growth on biomolecular templates allows for the fabrication of nanosized metal structures in a perfectly clean surrounding medium . To improve the control of all phases of the cluster-formation process, a detailed understanding of the elementary steps of cluster growth is desirable.…”

“…8 Monodisperse colloidal suspensions present optimal catalytic properties 9 and can be employed for the production of selfassembled particle arrays with peculiar electronic and optical properties. [10][11][12] Moreover, the controlled, selectively heterogeneous metal growth on biomolecular templates allows for the fabrication of nanosized metal structures in a perfectly clean surrounding medium. 13 To improve the control of all phases of the cluster-formation process, a detailed understanding of the elementary steps of cluster growth is desirable.…”

Nanoclusters – Building Blocks for Future Nanoelectronic Devices?

“…However, only recently we succeeded in making extended organized monolayers of Au 55 (PPh 3 ) 12 Cl 6 clusters. [18,19] Among various techniques the one described in the following turned out to give best and easily reproducible results. Figure 7 illustrates the procedure.…”

Quasi One-Dimensional Arrangements of Au55(PPh3)12Cl6Clusters and Their Electrical Properties at Room Temperature

“…Twodimensional (2D) arrangements of perfectly ordered Au 55 clusters have been described by us. 9,10 For one-dimensional (1D) arrangements we are just developing novel strategies by the use of functionalized polymers and DNA or by special procedures related to Langmuir-Blodgett techniques. 11 However, the generation of 1D arrangements of clusters in the 1-2 nm range is still a strong challenge.…”

“…Single-electron tunneling at room temperature in nanometer sized particles has developed to promising techniques for future nanoelectronics. − Independent of the kind of application, the three-, two-, or one-dimensional organization of the particles is an unrenounceable condition. Two-dimensional (2D) arrangements of perfectly ordered Au 55 clusters have been described by us. , For one-dimensional (1D) arrangements we are just developing novel strategies by the use of functionalized polymers and DNA or by special procedures related to Langmuir−Blodgett techniques…”