Surface functionalization of 6H-SiC using organophosphonate monolayers

M. Auernhammer; S. J. Schoell; M. Sachsenhauser; K. C. Liao; J. Schwartz; I. D. Sharp; A. Cattani-Scholz

doi:10.1063/1.3691919

Surface functionalization of 6H-SiC using organophosphonate monolayers

M. Auernhammer, S. J. Schoell, M. Sachsenhauser, K. C. Liao, J. Schwartz, I. D. Sharp, A. Cattani-Scholz

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Abstract

The synthesis and characterization of self-assembled monolayers prepared from 11-hydroxyundecyphosphonic acid and 9,10-diphenyl-2,6-diphosphonoanthracene on n-type 6H-SiC is described. Structural and chemical properties of these monolayers were investigated through contact angle measurements, atomic force microscopy, x-ray photoelectron spectroscopy, and Fourier transformation infrared spectroscopy, which indicate covalent bonding of the phosphonates to both (0001)- and (000-1)-oriented 6H-SiC crystal faces. Electrical characterization was achieved through contact potential difference and surface photovoltage measurements, which revealed significant changes in the work functions of the substrates by monolayer formation.

Original language	English (US)
Article number	101601
Journal	Applied Physics Letters
Volume	100
Issue number	10
DOIs	https://doi.org/10.1063/1.3691919
State	Published - Mar 5 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3691919

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title = "Surface functionalization of 6H-SiC using organophosphonate monolayers",

abstract = "The synthesis and characterization of self-assembled monolayers prepared from 11-hydroxyundecyphosphonic acid and 9,10-diphenyl-2,6-diphosphonoanthracene on n-type 6H-SiC is described. Structural and chemical properties of these monolayers were investigated through contact angle measurements, atomic force microscopy, x-ray photoelectron spectroscopy, and Fourier transformation infrared spectroscopy, which indicate covalent bonding of the phosphonates to both (0001)- and (000-1)-oriented 6H-SiC crystal faces. Electrical characterization was achieved through contact potential difference and surface photovoltage measurements, which revealed significant changes in the work functions of the substrates by monolayer formation.",

author = "M. Auernhammer and Schoell, {S. J.} and M. Sachsenhauser and Liao, {K. C.} and J. Schwartz and Sharp, {I. D.} and A. Cattani-Scholz",

note = "Funding Information: This work was financially supported by the Technische Universit{\"a}t M{\"u}nchen – Institute for Advanced Study (IAS), the Nanosystems Initiative Munich (NIM), and the International Graduate School of Science and Engineering (IGSSE), all funded by the German Excellence Initiative. The authors also gratefully acknowledge funding by the DFG (Grant Nos. AB 35/8-1 and TO 266/2-1) and by the NSF (No. CHE-0924104). S.J.S. acknowledges additional support from the CompInt (Materials Science of Complex Interfaces) graduate school. ",

year = "2012",

month = mar,

day = "5",

doi = "10.1063/1.3691919",

language = "English (US)",

volume = "100",

journal = "Applied Physics Letters",

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TY - JOUR

T1 - Surface functionalization of 6H-SiC using organophosphonate monolayers

AU - Auernhammer, M.

AU - Schoell, S. J.

AU - Sachsenhauser, M.

AU - Liao, K. C.

AU - Schwartz, J.

AU - Sharp, I. D.

AU - Cattani-Scholz, A.

N1 - Funding Information: This work was financially supported by the Technische Universität München – Institute for Advanced Study (IAS), the Nanosystems Initiative Munich (NIM), and the International Graduate School of Science and Engineering (IGSSE), all funded by the German Excellence Initiative. The authors also gratefully acknowledge funding by the DFG (Grant Nos. AB 35/8-1 and TO 266/2-1) and by the NSF (No. CHE-0924104). S.J.S. acknowledges additional support from the CompInt (Materials Science of Complex Interfaces) graduate school.

PY - 2012/3/5

Y1 - 2012/3/5

N2 - The synthesis and characterization of self-assembled monolayers prepared from 11-hydroxyundecyphosphonic acid and 9,10-diphenyl-2,6-diphosphonoanthracene on n-type 6H-SiC is described. Structural and chemical properties of these monolayers were investigated through contact angle measurements, atomic force microscopy, x-ray photoelectron spectroscopy, and Fourier transformation infrared spectroscopy, which indicate covalent bonding of the phosphonates to both (0001)- and (000-1)-oriented 6H-SiC crystal faces. Electrical characterization was achieved through contact potential difference and surface photovoltage measurements, which revealed significant changes in the work functions of the substrates by monolayer formation.

AB - The synthesis and characterization of self-assembled monolayers prepared from 11-hydroxyundecyphosphonic acid and 9,10-diphenyl-2,6-diphosphonoanthracene on n-type 6H-SiC is described. Structural and chemical properties of these monolayers were investigated through contact angle measurements, atomic force microscopy, x-ray photoelectron spectroscopy, and Fourier transformation infrared spectroscopy, which indicate covalent bonding of the phosphonates to both (0001)- and (000-1)-oriented 6H-SiC crystal faces. Electrical characterization was achieved through contact potential difference and surface photovoltage measurements, which revealed significant changes in the work functions of the substrates by monolayer formation.

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VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

M1 - 101601

ER -

Surface functionalization of 6H-SiC using organophosphonate monolayers

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