Fabrication of highly oriented nanocluster arrays by biomolecular templating

Citation
M. Mertig et al., Fabrication of highly oriented nanocluster arrays by biomolecular templating, EUR PHY J D, 9(1-4), 1999, pp. 45-48
Citations number
22
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL D
ISSN journal
14346060 → ACNP
Volume
9
Issue
1-4
Year of publication
1999
Pages
45 - 48
Database
ISI
SICI code
1434-6060(199912)9:1-4<45:FOHONA>2.0.ZU;2-9
Abstract
The formation of highly oriented cluster arrays by chemical deposition of p latinum onto a regular 2D protein template is studied. The crystalline bact erial surface layer (S layer) of Sporosarcina ureae exhibiting a p4 symmetr y with a lattice spacing of 13.2 nm is used as the protein template. Cluste r deposition onto the S layer is achieved by chemical reduction of a platin um salt. The growth kinetics of the clusters has been examined by UV-VIS sp ectrometry. Transmission electron microscopy reveals the formation of well separated metal clusters with an average diameter of 1.9 +/- 0.6 nm. The la teral 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 crysta lline S layer.