Assembly and molecular order of two-dimensional peptoid nanosheets through the oil-water interface

Peptoid nanosheets are a recently discovered class of 2D nanomaterial that form from the self-assembly of a sequence-specific peptoid polymer at an air-water interface. Nanosheet formation occurs first through the assembly of a peptoid monolayer and subsequent compression into a bilayer structure. T...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2014-09, Vol.111 (37), p.13284-13289
Main Authors: Robertson, Ellen J., Oliver, Gloria K., Qian, Menglu, Proulx, Caroline, Zuckermann, Ronald N., Richmond, Geraldine L
Format: Article
Language:English
Subjects:
adsorption
Amines
Biological Sciences
Carboxylates
Catalysts
electrostatic interactions
enzymes
Functional groups
Hexanes
Interfacial tension
Membranes
Models, Molecular
Molecules
Nanomaterials
Nanoparticles - chemistry
nanosheets
Oil
oil-water interface
Oils - chemistry
Peptides
Peptoids - chemistry
Physical Sciences
Polymers
Pressure
Solvents
Spectroscopy
Spectrum Analysis
Vibration
Water
Water - chemistry
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Summary:Peptoid nanosheets are a recently discovered class of 2D nanomaterial that form from the self-assembly of a sequence-specific peptoid polymer at an air-water interface. Nanosheet formation occurs first through the assembly of a peptoid monolayer and subsequent compression into a bilayer structure. These bilayer materials span hundreds of micrometers in lateral dimensions and have the potential to be used in a variety of applications, such as in molecular sensors, artificial membranes, and as catalysts. This paper reports that the oil-water interface provides another opportunity for growth of these unique and highly ordered peptoid sheets. The monolayers formed at this interface are found through surface spectroscopic measurements to be highly ordered and electrostatic interactions between the charged moieties, namely carboxylate and ammonium residues, of the peptoid are essential in the ability of these peptoids to form ordered nanosheets at the oil-water interface. Expanding the mechanism of peptoid nanosheet formation to the oil-water interface and understanding the crucial role of electrostatic interactions between peptoid residues in nanosheet formation is essential for increasing the complexity and functionality of these nanomaterials.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1414843111