Electrostatic‐Driven Dynamic Jamming of 2D Nanoparticles at Interfaces for Controlled Molecular Diffusion

Abstract

Dynamically engineering the interfacial interaction of nanoparticles has emerged as anew approach for bottom-up fabrication of smart systems to tailor molecular diffusion and controlled release.J anus zwitterionic nanoplates are reported that can be switched between al ocked and unlocked state at interfaces upon changing surface charge,a llowing manipulation of interfacial properties in af ast, flexible,a nd switchable manner.C ombining experimental and modeling studies,a n unambiguous correlation is established among the electrostatic energy,t he interface geometry,a nd the interfacial jamming states.A saproof-of-concept, the well-controlled interfacial jamming of nanoplates enabled the switchable molecular diffusion through liquid-liquid interfaces,c onfirming the feasibility of using nanoparticle-based surfactants for advanced controlled release.

Emulsifier-Free Acrylate-Based Emulsion Prepared by Reverse Iodine Transfer Polymerization

“…Dispersed system in emulsion is thermodynamically unstable, and the system can be stable when hydrophilic groups from emulsifiers are incorporated into the polymer [5]. In some emerging fields, emulsifiers such as nano emulsifiers [6][7][8][9][10] synthesized in emulsion can be used for preparing nanoparticles with special function. With the use of nonpolymeric emulsifier, acrylate-based latex with high solid content (over 40 wt.%) and low viscosity can be prepared.…”

Iridescence in nematics: Photonic liquid crystals of nanoplates in absence of long-range periodicity

“…Driven by entropic interaction, the self-assembly of 2D nanodiscs can produce a fascinating variety of LC structures ranging from orientationally ordered nematic (N) to positionally ordered structures, including lamellar (L) and columnar (C) phases with positional order in 1 and 2 dimensions, respectively (4). These superstructures with controlled ordering have emerged as promising paradigms addressing challenges in energy storage (5), controlled drug delivery (6,7), and self-healing materials (8). For example, by controlling liquid-crystalline alignment of 2D titanium carbide (MXene), researchers have demonstrated thicknessindependent capacitance of vertically aligned nanosheet-based film (5).…”

Nanoparticle surfactants and structured liquids

“…On the other hand, different liquid systems, e.g., aqueous two-phase system and oil/oil system, can be used to construct structured liquids [59][60][61][62]. The generation of multiple stimuli-responsive structured liquids is an emerging field just started, which can be achieved either by exploring new interactions at the interface [56,[63][64][65] or synthesizing NPs and functional polymer/ oligomer ligands [66][67][68][69][70].…”