Structure of n-Alkyltrichlorosilane Mono layers on Si(100)/SiO2

Steinrück HG, Will J, Magerl A, Ocko B (2015)

Publication Status: Published

Publication Type: Journal article

Publication year: 2015

Journal

Langmuir American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 31

Pages Range: 11774-11780

Journal Issue: 43

DOI: 10.1021/acs.langmuir.5b03091

Abstract

The structure of n-alkyltrichlorosilane self-assembled monolayers (SAMs) of alkyl chain lengths n = 12, 14, 18, and 22 formed on the amorphous native oxide of silicon (100) has been investigated via angstrom-resolution surface X-ray scattering techniques, with particular focus on the proliferation of lateral order along the molecules' long axis. Grazing incidence diffraction shows that the monolayer is composed of hexagonally packed crystalline-like domains for n = 14, 18, and 22 with a lateral size of about 60 A. However, Bragg rod analysis shows that similar to 12 of the CH, units are not included in the crystalline-like domains. We assign this, and the limited lateral crystallites' size, to strain induced by the size mismatch between the optimal chain-chain and headgroup-headgroup spacings. Analysis of X-ray reflectivity profiles for n = 12, 14, and 22 shows that the density profile used to successfully model n = 18 provides an excellent fit where the analysis-derived parameters provide complementary structural information to the grazing incidence results.

Authors with CRIS profile

Hans-Georg Steinrück Lehrstuhl für Kristallographie und Strukturphysik (ICSP) Johannes Will Lehrstuhl für Kristallographie und Strukturphysik (ICSP) Andreas Magerl Naturwissenschaftliche Fakultät

Involved external institutions

Brookhaven National Laboratory US United States (USA) (US)

How to cite

APA:

Steinrück, H.-G., Will, J., Magerl, A., & Ocko, B. (2015). Structure of n-Alkyltrichlorosilane Mono layers on Si(100)/SiO2. Langmuir, 31(43), 11774-11780. https://doi.org/10.1021/acs.langmuir.5b03091

MLA:

Steinrück, Hans-Georg, et al. "Structure of n-Alkyltrichlorosilane Mono layers on Si(100)/SiO2." Langmuir 31.43 (2015): 11774-11780.

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