Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 32: Poster Session - Organic Molecules on Inorganic Substrates: Adsorption and Growth
O 32.3: Poster
Monday, March 16, 2020, 18:15–20:00, P1C
The adsorption structure of acetophenone on Si(100) — •Paula L. Lalaguna1,2, Paul T. P. Ryan1,3, Procopi C. Constantinou4, Matthias Muntwiler5, Holly Hedgeland6, Steven R. Schofield4, and David A. Duncan1 — 1Diamond Light Source, Didcot, OX11 0QX, UK — 2University of Glasgow, G12 8QQ, UK — 3Imperial College London, SW7 2AZ, UK — 4University College London, WC1H 0AH, UK — 5Paul Scherrer Institute, 5232 Villigen, Switzerland — 6The Open University, Milton Keynes, MK7 6AA, UK
Over the last decade, Moore’s law has begun to slow as fundamental length scale limits are being reached in the utilization of Si for transistors (∼14 nm)[1]. One potential method for delaying the end of Moore’s law is to pattern Si surfaces with organic molecules, providing an accessible length scale in the order of a few ångstroms. However, in order to understand how these molecules interact and alter the Si substrate, high quality and high precision measurements are required. Here we will present one such study of Si(100) patterned with acetophenone by energy scanned photoelectron diffraction (PhD). Acetophenone is believed to anchor to the Si substrate via a strong covalent bond[2]. Utilizing PhD, we provide an insight into this anchoring, specifically measuring the Si-O bond length of the adsorbed molecule to a precision of a few hundredths of an ångstrom. [1] Nature 530, 144 (2016); [2] J. Phys. Condens. Matter 27, 054002 (2015).