- Plenty of Room at the Top: A Multi-Scale Understanding of nm-Resolution Polymer Patterning on 2D Materials
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Lamellar phases of alkyldiacetylenes in which the alkyl chains lie parallel to the substrate represent a straightforward means for scalable 1-nm-resolution interfacial patterning. This capability has the potential for substantial impacts in nanoscale electronics, energy conversion, and biomaterials design. Polymerization is required to set the 1-nm functional patterns embedded in the monolayer, making it important to understand structure–function relationships for these on-surface reactions. Polymerization can be observed for certain monomers at the single-polymer scale using scanning probe microscopy. However, substantial restrictions on the systems that can be effectively characterized have limited utility. Here, using a new multi-scale approach, we identify a large, previously unreported difference in polymerization efficiency between the two most widely used commercial diynoic acids. We further identify a core design principle for maximizing polymerization efficiency in these on-surface reactions, generating a new monomer that also exhibits enhanced polymerization efficiency.
- Brooks, Jacob T.,Claridge, Shelley A.,Davis, Tyson C.,Hayes, Tyler R.,Shi, Anni,Singh, Anamika,Villarreal, Terry A.
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supporting information
p. 25436 - 25444
(2021/10/29)
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- Heterocyclic derivatives of long-chain diacetylenic acids
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Acyl derivatives of 2-aminopyridine, 2-aminopyrimidine, 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl were obtained form long-chain diacetylenic acyl chlorides and the corresponding heterocyclic compounds.Spreading isotherms of monolayers on a water surface show that lengthening of the hydrocarbon chain and replacement of the pyridyl groups in these compounds by the more hydrophilic pyrimidyl groups render the films more condensed.Long-chain acyl derivatives of nitroxyl radicals form monolayers possesing a low collapse pressure.ESR spectra on Langmuir-Blodgett films of these radicals before and after photopolymerization were recorded. - Keywords: long-chain diacetylenic acids, N-pyridyl and N-pyrimidylamides of alkanediynic acids, long-chain derivatives of nitroxyl radicals, synthesis, monolayers, Langmuir-Blodgett films
- Usov, O. M.,Tret'yakov, E. V.,Sveshnikova, L. L.,Shvartsberg, M. S.
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p. 1929 - 1932
(2007/10/03)
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