Photochemical Creation of Covalent Organic 2D Monolayer Objects in Defined Shapes via a Lithographic 2D Polymerization
Servalli M, Celebi K, Payamyar P, Zheng L, Polozij M, Lowe B, Kuc A, Schwarz T, Thorwarth K, Borgschulte A, Heine T, Zenobi R, Schluter AD (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 12
Pages Range: 11294-11306
Journal Issue: 11
Abstract
In this work we prepare Langmuir-Blodgett monolayers with a trifunctional amphiphilic anthraphane monomer. Upon spreading at the air/water interface, the monomers self-assemble into 1 nm-thin monolayer islands, which are highly fluorescent and can be visualized by the naked eye upon excitation. In situ fluorescence spectroscopy indicates that in the monolayers, all the anthracene units of the monomers are stacked face-to-face forming excimer pairs, whereas at the edges of the monolayers, free anthracenes are present acting as edge groups. Irradiation of the monolayer triggers [4 + 4]-cycloadditions among the excimer pairs, effectively resulting in a two-dimensional (2D) polymerization. The polymerization reaction also completely quenches the fluorescence, allowing to draw patterns on the monomer monolayers. More interestingly, after transferring the monomer monolayer on a solid substrate, by employing masks or the laser of a confocal scanning microscope, it is possible to arbitrarily select the parts of the monolayer that one wants to polymerize. The unpolymerized regions can then be washed away from the substrate, leaving 2D macromolecular monolayer objects of the desired shape. This photolithographic process employs 2D polymerizations and affords 1 nm-thin coatings.
Involved external institutions
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
Harvard University
United States (USA) (US)
Universität Leipzig
Germany (DE)
Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Switzerland (CH)
Switzerland (CH)
Harvard University
United States (USA) (US)
Universität Leipzig
Germany (DE)
Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Switzerland (CH)
How to cite
APA:
Servalli, M., Celebi, K., Payamyar, P., Zheng, L., Polozij, M., Lowe, B.,... Schluter, A.D. (2018). Photochemical Creation of Covalent Organic 2D Monolayer Objects in Defined Shapes via a Lithographic 2D Polymerization. ACS nano, 12(11), 11294-11306. https://doi.org/10.1021/acsnano.8b05964
MLA:
Servalli, Marco, et al. "Photochemical Creation of Covalent Organic 2D Monolayer Objects in Defined Shapes via a Lithographic 2D Polymerization." ACS nano 12.11 (2018): 11294-11306.
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