Use of attractive forces to create a self-assembled film of charged nano-particles with a controlled packing

Iwafuji, Yuya; McNamee, Cathy E.

doi:10.1016/j.colsurfa.2012.02.004

Cited by 4 publications

(3 citation statements)

References 54 publications

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“…The electrostatic self-assembly of particles has become an important and effective route to the synthesis of structured materials, many with unique optical, magnetic or mechanical properties [1][2][3][4][5]. By using particulate components carrying charges of opposite sign, it has become possible to assemble two-and three-dimensional structures from a wide range of dielectric and conducting particles [6][7][8][9]. A cursory search of the literature reveals a steady year-on-year increase in the number of experimental papers devoted to this topic, with almost 8000 publications in the past 10 years.…”

Section: Introductionmentioning

confidence: 99%

“…Both these studies have been the subject of a series of computer simulations where attempts have been made to reproduce the collision dynamics that ultimately leads to the experimental observation of assembled structures [29][30][31][32][33][34]. Although the fabrication of many devices [1][2][3][4][5][6][7][8][9] can involve (nano)particles that are much smaller than those studied here, it can be shown through scaling relationships [35] that as a function of their charge to size ratio, there is a direct correspondence between forces predicted for any given collection of charged spheres and those that will be present in either a larger or smaller system.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic simulations of many-body electrostatic self-assembly

Lindgren

Stamm

Maday

et al. 2018

Phil. Trans. R. Soc. A.

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Two experimental studies relating to electrostatic self-assembly have been the subject of dynamic computer simulations, where the consequences of changing the charge and the dielectric constant of the materials concerned have been explored. One series of calculations relates to experiments on the assembly of polymer particles that have been subjected to tribocharging and the simulations successfully reproduce many of the observed patterns of behaviour. A second study explores events observed following collisions between single particles and small clusters composed of charged particles derived from a metal oxide composite. As before, observations recorded during the course of the experiments are reproduced by the calculations. One study in particular reveals how particle polarizability can influence the assembly process.This article is part of the theme issue 'Modern theoretical chemistry'.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic simulations of many-body electrostatic self-assembly

Lindgren

Stamm

Maday

et al. 2018

Phil. Trans. R. Soc. A.

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“…33 Adsorption of negatively charged gold nanoparticles on a Langmuir film of dioctadecyldimethylammonium bromide at the air-water interface has been shown to be influenced by the electrostatic interaction between the monolayer and the nanoparticles, flow of water in the subphase and the mass of the nanoparticles. 34 Studies on the interaction of positively charged poly(allylamine hydrochloride)-functionalized and negatively charged citrate-capped gold nanoparticles with different lipids in Langmuir monolayers have revealed the crucial role of the charge on the capping agent and the impact on the elasticity of the monolayers. 35 Dendritic nanogold aggregates were generated by salt-induced assembly of gold nanoparticles mediated by the polyacrylamide-cetyltrimethylammonim bromide complex at the air-water interface.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle assembly following Langmuir–Hinshelwood kinetics on a Langmuir film and chain networks captured in LB films

Maganti

Jash

Nair

et al. 2015

Phys. Chem. Chem. Phys.

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The Langmuir-Blodgett (LB) technique is an elegant protocol for the steered assembly of metal nanoparticles, the deposition pressure serving as a convenient parameter to tune the assembly. Adsorption of nanoparticles from the subphase to the air-water interface can provide further control of the process. Citrate-stabilized gold nanoparticles in the aqueous subphase are shown to assemble into extended 2-dimensional chain networks following adsorption on a cationic amphiphile Langmuir film at the air-water interface. Kinetic investigations show that the process can be visualized as a surface-catalyzed reaction and explained in terms of the Langmuir-Hinshelwood mechanism. The LB deposition proves to be a unique route to capture the reaction product together with the amphiphile film. The deposition pressure is used to tune the density of nanoparticle chain networks in the LB film, and their optical extinction spectrum. The unusual blue shift of the extinction observed with increasing deposition pressure is attributed to the impact of the amphiphile monolayer environment. The extent of formation of the chain network is analyzed in terms of the pathways in the corresponding graph representation, and shown to scale with the deposition pressure. The current investigation highlights the use of a charged monolayer as a heterogeneous catalyst surface, provides fundamental insight into the kinetics of nanoparticle assembly at interfaces, and demonstrates the utility of the LB technique in tuning the formation of 2-dimensional nanoparticle chain networks.

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Heterogeneous integration of AuNRs monolayer with MoS2 film assembled for highly efficient surface-enhanced Raman scattering and significant in improvement electrical conductivity

Zhou

Zhang

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Use of attractive forces to create a self-assembled film of charged nano-particles with a controlled packing

Cited by 4 publications

References 54 publications

Dynamic simulations of many-body electrostatic self-assembly

Dynamic simulations of many-body electrostatic self-assembly

Nanoparticle assembly following Langmuir–Hinshelwood kinetics on a Langmuir film and chain networks captured in LB films

Heterogeneous integration of AuNRs monolayer with MoS2 film assembled for highly efficient surface-enhanced Raman scattering and significant in improvement electrical conductivity

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