Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.18: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Nanoline templates for single atom wires on Si(001) — •Sigrun A. Köster1, James H. G. Owen1, François Bianco1, Daniel Mazur1, Alvaro Rodriguez-Prieto2, David R. Bowler2, and Chrisoph Renner1 — 1Université de Genève, Section Physique/DPMC, Quai Ernest-Ansermet 24, 1211 Genève 4, CH — 2London Centre for Nanotechnology (LCN), University College London, UCL 17-19 Gordon Street, WC1H 0AH, London, UK
Low dimensional structures are of wide scientific and technological interest. The physics of single atom metallic wires is already described in detail by theory, but a more systematic experimental verification is still desirable. The experimental problems are mainly caused by the difficulties of growing electronically isolated wires which is necessary to test the expected properties from existing theories. Here we introduce templates on a Si(001) surface which enable the growth of self-assembled single atom wires on top of them. The main template consists of a Si reconstruction called the Haiku structure[1] which develops underneath self-assembled Bi nanowires[2]. By hydrogenation the Si surface can be passivated and additionally the Bi dimers are stripped off while the underlying reconstruction of the Si surface remains intact. In addition the Bi nanowire by itself can be considered as a template[3].
[1] J.H.G.Owen, K.Miki, H.Koh, H.W.Yeom and D.R.Bowler, Phys. Rev. Lett. 88, 226104 (2002) [2] J. H. G. Owen, K. Miki, and D. R. Bowler, J. Mater. Sci. 41, 4568 (2006) [3] J. H. G. Owen and K. Miki, Nanotechnology 17, 430 (2006)