Fabrication of highly oriented nanocluster arrays by biomolecular templating

Mertig, M.; Kirsch, R.; Pompe, W.; Engelhardt, H.

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Fabrication of highly oriented nanocluster arrays by biomolecular templating

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Mertig, M., Kirsch, R., Pompe, W., & Engelhardt, H. (1999). Fabrication of highly oriented nanocluster arrays by biomolecular templating. European Physical Journal D, 9(1-4 Special Issue SI), 45-48.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-71B3-0

Abstract

The formation of highly oriented cluster arrays by chemical deposition of platinum onto a regular 2D protein template is studied. The crystalline bacterial surface layer (S layer) of Sporosarcina ureae exhibiting a p4 symmetry with a lattice spacing of 13.2 nm is used as the protein template. Cluster deposition onto the S layer is achieved by chemical reduction of a platinum salt. The growth kinetics of the clusters has been examined by UV-VIS spectrometry. Transmission electron microscopy reveals the formation of well separated metal clusters with an average diameter of 1.9 +/- 0.6 nm. The lateral cluster arrangement is defined by the underlying protein crystal. We observe 7 cluster sites per unit cell corresponding to a density of 4 x 10(12) cm(-2). They are located in the nano-sized pores and gaps of the crystalline S layer. [References: 22]