Bilayer and Odd-Numbered Multilayers of Octadecylphosphonic Acid Formed on a Si Substrate Studied by Atomic Force Microscopy

. Self-assembled monolayers of alkylphosphonic acids on aluminum oxide surfaces -A theoretical study. Zeitschrift für Anorganische und Allgemeine Chemie, 2010, 636 (8) (001) and boehmite γ-AlOOH (010) surface models. Mono-, bi-, and tridentate adsorption modes have been considered. In addition, the organization of single adsorbed molecules has been compared to the organization at full surface coverage. The height (thickness) of the self-assembled monolayers is always shorter than the length of the phosphonic acid molecules due to tilting of the alkyl chains. Tilt angles at full surface coverage are very similar to the tilt angle of a single adsorbed molecule, indicating that the density of the self-assembled monolayers is limited by the density of adsorption sites. The lateral interactions between alkyl chains are evidenced by small torsions of the adsorbed molecules, which may serve to minimize the repulsion forces between interchain hydrogen atoms. Similar tilt angles have been obtained for mono-, bi-, and tridentate adsorptions. Hence, the coordination mode cannot be characterized by the molecule tilting.____________ [a]

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“…16.5 46 [21] 17 45 [22] TiO 2 22 33 [23] Si/SiO 2 18 40 [20] 24 - [24] Au/Cu(UPD) 20 30 [25] Al/Al 2 O 3 -31…”

Section: Resultsmentioning

confidence: 99%

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Luschtinetz

Oliveira

Duarte

et al. 2010

Zeitschrift anorg allge chemie

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“…8 Figure 4 shows simultaneously recorded topography and friction force images of the 1-D structures. As already discussed, the mica surface is covered by the Py-DPA basic monolayer terminated by pyrrole groups that provide rather weak tip-sample interactions.…”

Section: Resultsmentioning

confidence: 99%

“…[4][5][6][7][8][9] Micrometer-scale patterns of APAs on the previously mentioned surfaces can be prepared using µCP techniques with the aid of structured poly(dimethylsiloxane) (PDMS) stamps. In this paper, we propose an alternative approach to APAs patterns.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional SAMs of (12-Pyrrol-1-yl-dodecyl)-phosphonic Acid Templated by Polyelectrolyte Molecules

et al. 2007

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We present a novel method for the fabrication of one-dimensional (1-D) self-assembled monolayers and multilayers (SAMs) of (12-pyrrol-1-yl-dodecyl)-phosphonic acid (Py-DPA) on various polar surfaces using polyelectrolyte nanostructures as positive templates. Particularly, we demonstrate that (i) patterns of aligned 1-D polycation structures on a poly(dimethylsiloxane) stamp can be prepared by moving a droplet of polycation solution along the surface; (ii) these patterns can be used as templates for the ordered assembly of Py-DPA in water where Py-DPA carries a charge opposite to the charge of the template; and (iii) Py-DPA SAMs can then be transferred onto mica or silicon wafers by a printing process. These nanostructures with a polymerizable pyrrole headgroup might be useful for the creation of electrically conductive patterns of conjugated polymers.

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“…Alkylphosphonic acids are also an important class of SAM molecules because of their ability to assemble on a number of oxide surfaces, such as tantalum oxide, aluminum oxide, silicon oxide, iron oxide, copper oxide, and mica, and to form robust surface films [78][79][80][81][82][83][84][85][86][87][88][89][90][91][92]. Compared to SAMs of fatty acids, alkanethiols, and alkylsilanes, which have been studied extensively, phosphonic acid-based SAMs have not received much attention [84].…”

Section: Interactions Between Head Groups and Substrate Surfacesmentioning

confidence: 99%

Influence of chain ordering on frictional properties of self-assembled monolayers (SAMs) in nano-lubrication

Cheng

2012

Advances in Colloid and Interface Science

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Bilayer and Odd-Numbered Multilayers of Octadecylphosphonic Acid Formed on a Si Substrate Studied by Atomic Force Microscopy

Cited by 51 publications

References 17 publications

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

One-Dimensional SAMs of (12-Pyrrol-1-yl-dodecyl)-phosphonic Acid Templated by Polyelectrolyte Molecules

Influence of chain ordering on frictional properties of self-assembled monolayers (SAMs) in nano-lubrication

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