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Self-Assembled Monolayers: Assembling, Disassembling and Reassembling Studies Using Afm

Published online by Cambridge University Press:  02 July 2020

B.R.A. Neves ,
M. E. Salmon ,
D.N. Leonard ,
P.E. Russell  and
E.B. Troughton Jr.
B.R.A. Neves
Affiliation:
AIF - North Carolina State University, Box 7531, Raleigh, NC27695, USA
M. E. Salmon
Affiliation:
AIF - North Carolina State University, Box 7531, Raleigh, NC27695, USA
D.N. Leonard
Affiliation:
AIF - North Carolina State University, Box 7531, Raleigh, NC27695, USA
P.E. Russell
Affiliation:
AIF - North Carolina State University, Box 7531, Raleigh, NC27695, USA
E.B. Troughton Jr.
Affiliation:
Thomas Lord Research Center, Lord Corporation, Box 8012, Cary, NC27512, USA
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Extract

Self-assembled monolayers (SAM) and multilayers of organic materials have been intensely studied in the past years, due to their numerous potential applications as, for example, lubricants, corrosioninhibitors and/or adhesion-promoters [1,2]. In this talk, we will present results of several studies carried out using Atomic Force Microscopy to investigate octadecylphosphonic acid (OPA) SAM deposited on mica. We have assessed various mechanisms of assembling, disassembling and reassembling the SAM on mica. The SAM deposition method employed in this work was drip coating using an OPA solution. We have used two different solvents, which exhibit very different OPA solubility, in this work: ethanol and trihydrofuran (THF). Regarding the assembling studies, we will show the formation of groups of OPA double-layers as the initial deposition stage (deposition time < 2 seconds) when using ethanol-based solutions. We will also show that annealing such samples at 60°C produces, favorably, OPA quadruple-layers, as shown in figures la and lb, respectively.

Type
Scanned Probe Microscopy: Much More Than Just Beautiful Images
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 964 - 965
Copyright
Copyright © Microscopy Society of America

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References

[1]- Laibinis, P.E., Hickman, J.J., Wrighton, M.S., Whitsides, G.M., Science 245 (1989) 845.CrossRefGoogle Scholar

[2]- Ulman, A., An Introduction to Ultrathin Films, Academic Press, San Diego, USA (1991).Google Scholar