Journal ArticleDOI
Field-Induced Layering of Colloidal Crystals
TLDR
The ability to modulate this “lateral attraction” between particles, by adjusting field strength or frequency, facilitates the reversible formation of two-dimensional fluid and crystalline colloidal states on the electrode surface.Abstract:
An electrohydrodynamic methodology has been developed that makes possible the precise assembly of two- and three-dimensional colloidal crystals on electrode surfaces. Electrophoretically deposited colloidal particles were observed to move toward one another over very large distances (greater than five particle diameters) to form two-dimensional colloidal crystals for both micrometer- and nanometer-size particles. This coalescence of particles with the same charge is opposite to what is expected from electrostatic considerations and appears to result from electrohydrodynamic fluid flow arising from an ionic current flowing through the solution. The ability to modulate this "lateral attraction" between particles, by adjusting field strength or frequency, facilitates the reversible formation of two-dimensional fluid and crystalline colloidal states on the electrode surface. Further manipulation allows controlled structures to be assembled.read more
Citations
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Journal ArticleDOI
Engineering flows in small devices
TL;DR: An overview of flows in microdevices with focus on electrokinetics, mixing and dispersion, and multiphase flows is provided, highlighting topics important for the description of the fluid dynamics: driving forces, geometry, and the chemical characteristics of surfaces.
Molecular self-assembly and nanochemistry: A chemical strategy for the synthesis of nanostructures
TL;DR: In this article, self-assembly is defined as the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds.
Journal ArticleDOI
A review on fundamentals and applications of electrophoretic deposition (EPD)
Laxmidhar Besra,Meilin Liu +1 more
TL;DR: In this article, a review of the fundamental aspects of electrophoretic deposition technique, factors influencing the deposition process, kinetic aspects, types of EPD, the driving forces, preconditioning electrophoreic suspension, stability and control of suspension, mechanisms involved in EPD and drying of deposits obtained by EPD are discussed.
Journal ArticleDOI
Responsive photonic crystals.
Jianping Ge,Yadong Yin +1 more
TL;DR: This Review summarizes recent developments in the field of responsive photonic crystal structures, including principles for design and fabrication and many strategies for applications, for example as optical switches or chemical and biological sensors.
Journal ArticleDOI
Calcium orthophosphates: crystallization and dissolution.
Lijun Wang,George H. Nancollas +1 more
TL;DR: Some important parameters related to crystal nucleation and growth/dissolution including the supersaturation/undersaturation, pH, ionic strength and the ratio of calcium to phosphate activities are discussed.
References
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Journal ArticleDOI
A study of the nucleation and growth processes in the synthesis of colloidal gold
TL;DR: In this paper, a preliminary survey with the electron microscope of various preparations of colloidal gold, a study was made of the process of nucleation and growth in gold colloids, and it was shown that nucleating agents may be identified with reducing agents which form a mixed polymer with chlorauric ion before the reduction to the nucleus takes place.
Journal ArticleDOI
Ordered Metal Nanohole Arrays Made by a Two-Step Replication of Honeycomb Structures of Anodic Alumina
Hideki Masuda,Kenji Fukuda +1 more
TL;DR: A highly ordered metal nanohole array (platinum and gold) was fabricated by a two-step replication of the honeycomb structure of anodic porous alumina that showed a notable color change compared with bulk gold.
Journal ArticleDOI
Molecular self-assembly and nanochemistry: a chemical strategy for the synthesis of nanostructures.
TL;DR: The ability to prepare structures in the upper part of this range of sizes would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.
Molecular self-assembly and nanochemistry: A chemical strategy for the synthesis of nanostructures
TL;DR: In this article, self-assembly is defined as the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds.
Journal ArticleDOI
Phase behaviour of concentrated suspensions of nearly hard colloidal spheres
P. N. Pusey,W. van Megen +1 more
TL;DR: In this paper, a detailed study of the phase diagram of suspensions of colloidal spheres which interact through a steep repulsive potential is presented. But it is not a detailed analysis of the colloidal glass phase.