Structural-Size Control of Domain from Nano to Micro: Logical Balancing between Attractive and Repulsive Interactions in Two Dimensions

Abstract

Molecules aggregate to form a structure through various interactions involving dispersion force, electrostatic force, and so on. In two-dimensional systems, a surface energetic effect is further important for the molecular aggregation structure. We show that the domain size and its morphology in the mixed monomolecular film composed of hydrocarbon and fluorocarbon skeletons with different surface free energies extremely change depending on pH and NaCl concentration in the subphase. Such morphological changes can be interpreted by the balance of dipole density and line tension, which help in the development of an understanding of phase separation phenomena and provide a novel technique for structural control in two dimensions.

Don’t Forget Langmuir–Blodgett Films 2020: Interfacial Nanoarchitectonics with Molecules, Materials, and Living Objects

“…Further hierarchical assembly into hexagonal arrays of the mesoscopic domains is induced upon compression of the film by lateral pressures. A rational approach to the regulation of 2D colloidal domains of the mixed monolayers of ([di­octa­decyl carba­moyl]­methyl)­guanidinium p -toluene­sulfonate and bis­(1 H ,1 H ,2 H ,2 H -per­fluoro­decyl)- N -(3-carboxy­propionyl)-glutamate at the air–water interface was reported by Oishi and co-workers . In these mixed monolayer systems, both the attractive interaction between guanidium and glutamate and repulsive (phase-separation) effects between hydrocarbon chains and fluorocarbon chains are working together.…”

“…A rational approach to the regulation of 2D colloidal domains of the mixed monolayers of ([dioctadecyl carbamoyl]methyl)guanidinium p-toluenesulfonate and bis(1H,1H,2H,2H-perfluorodecyl)-N-(3-carboxypropionyl)-glutamate at the air−water interface was reported by Oishi and co-workers. 122 In these mixed monolayer systems, both the attractive interaction between guanidium and glutamate and repulsive (phase-separation) effects between hydrocarbon chains and fluorocarbon chains are working together. The balance between these opposite interactions can be regulated by several conditions such as subphase pH and ionic strength, resulting in the rational control of 2D domain diameters from nanosize to microsize.…”

Nanoarchitectonics beyond Self‐Assembly: Challenges to Create Bio‐Like Hierarchic Organization

“…[48] Oishi and co-workers also reported discrete domain-size control within their two-dimensional self-assemblies upon balancing hydrocarbon/fluorocarbon phase separation and electrostatic attraction of carboxylate and guanidinium functional groups ( Figure 4B). [49] In more highly advanced control of self-assembly,temporal controls of self-assembly have been discussed in ar ecent review article by Dhiman and George including demonstrations of living and transient supramolecular polymerization. [50] By analogy with living polymerization of conventional polymers,l engths and dispersities of self-assembled supramolecular polymers can be precisely controlled under selected conditions.Inother types of temporal control of selfassembly processes,M inami, Shrestha, and co-workers suc- cessfully demonstrated time-programmed supramolecular differentiations in self-assembled structures of two kinds of fullerene derivatives,penta(phenyl)fullereneand pentakis(4dodecylphenyl)fullerene ( Figure 5).…”

Nanoarchitektonik als ein Ansatz zur Erzeugung bioähnlicher hierarchischer Organisate

“…[48] Oishi und Mitarbeiter berichteten ebenfalls über diskrete Kontrollen der Domänengrçße innerhalb ihrer zweidimensionalen Selbstassemblierungen beim Ausgleich der Kohlenwasserstoff/Fluorkohlenstoff-Phasentrennung und der elektrostatischen Anziehung der Carboxylat-und der Guanidiniumfunktion (Abbildung 4B). [49] Fürfortschrittlichere Kontrollen der Selbstassemblierung wurden vor kurzem in einem Aufsatz von Dhiman und George temporäre Kontrollen der Selbstassemblierung diskutiert, einschließlich Vorführungen lebender und transienter supramolekularer Polymerisationen. [50] In Analogie zur lebenden Polymerisation konventioneller Polymere kçnnen die Längen und die Dispersitäten selbstassemblierter supramolekularer Polymere unter bestimmten Bedingungen genau kontrolliert werden.…”