Selective Immobilization of Nanoparticles on Surfaces by Molecular Recognition using Simple Multiple H-bonding Functionalities


  • This research received financial support from the FOM (the Netherlands), the Rijksuniversiteit Groningen's Breedtestrategie program and the MSCplus program. The authors would like to acknowledge the group of D. Roditchev (Institut des Nanosciences de Paris) for the use of the STS facility, Dr. B. de Boer for useful discussions, and Dr. M. Lubomska for preparation of the gold substrates. Supporting Information is available online from Wiley InterScience or from the authors.


Using a complementary pair of simple alkylthiolates with hydrogen-bonding moieties, functionalized Au55 clusters could be selectively deposited onto self-assembled monolayers on gold that carry the opposite functionality. The deposition can be readily controlled by the medium in which the clusters are dissolved and by the density of the functionalities in the self-assembled monolayers, and yields single clusters as well as two-dimensional cluster assemblies on the surface. The clusters are sufficiently strongly bound to give structures that are stable at ambient temperature, and that allow scanning tunneling spectroscopy on single clusters on the surface.