journal article·2014-12-23

Nanoscale Structure of Si/SiO2/Organics Interfaces

Hans-Georg Steinrück, Andreas Schiener, Torben Schindler, Johannes Will, Andreas Magerl, Oleg Konovalov, Giovanni Li Destri, Oliver H. Seeck, Markus Mezger, Julia Haddad, Moshe Deutsch, Antonio Checco, Benjamin M. Ocko

ACS Nano· Volume 8· Issue 12
Publisher page

Abstract

X-ray reflectivity measurements of increasingly more complex interfaces involving silicon (001) substrates reveal the existence of a thin low-density layer intruding between the single-crystalline silicon and the amorphous native SiO2 terminating it. The importance of accounting for this layer in modeling silicon/liquid interfaces and silicon-supported monolayers is demonstrated by comparing fits of the measured reflectivity curves by models including and excluding this layer. The inclusion of this layer, with 6-8 missing electrons per silicon unit cell area, consistent with one missing oxygen atom whose bonds remain hydrogen passivated, is found to be particularly important for an accurate and high-resolution determination of the surface normal density profile from reflectivities spanning extended momentum transfer ranges, now measurable at modern third-generation synchrotron sources.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Molecular Junctions and Nanostructures · Nanowire Synthesis and Applications · Silicon Nanostructures and Photoluminescence

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Crystallography and Structural Physics, University of Erlangen-Nürnberg, 91058 Erlangen, Germany

ESRF, 6 Rue Jules Horowitz, B.P. 220, 38043 Grenoble Cedex, France

HASYLAB am DESY, Notkestrasse 85, 22607 Hamburg, Germany

Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

Physics Department, and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel

Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States

Funding

Basic Energy Sciences · Deutsche Forschungsgemeinschaft · United States - Israel Binational Science Foundation

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