Concept

Colloidal crystal

Publications associées (232)

Numerical investigations of two-dimensional photonic crystal optical properties, design and analysis of photonic crystal based structures

Two-dimensional (2D) photonic crystals (PhCs) operating in the near-infrared wavelengths are promising candidates for novel integrated optics applications. In this work the optical properties of the Bloch modes in 2D photonic crystals have been investigate ...

EPFL2009

Modeling the Adsorption and Coagulation of Fulvic Acids on Colloids by Brownian Dynamics Simulations

Marianne Seijo, Montserrat Filella, Serge Stoll

Humic substances (HS) play an important role in the reactivity and transport of colloids in natural environments. In particular, the presence of fulvic acids (FA) in natural waters modifies the interactions between inorg. particles and biopolymers and make ...

American Chemical Society2009

Ceramic particles and layers for functional application

Heinrich Hofmann

Besides 'bulk' structural and functional ceramic, a third interesting group of inorganic or ceramic materials exists: particles used for medical applications like contrast agent as building blocks for photonic crystals, as thin or thick layers with control ...

2009

Development of a hyphenated analytical methodology for the fractionation and characterization of environmental colloids

Enrica Alasonati

Natural colloids are defined as macromolecules and nanoparticles with sizes ranging between 1 nm and 1 µm. Colloidal pool is complex "ill-defined" mixture of humic substances, exopolymeric substances (EPS), inorganic oxides, clays, etc. Aquatic colloids ha ...

EPFL2009

Calculation of surface Plasmon frequencies of two, three and four strongly interacting nanospheres

Majed Chergui

An approximate analytical approach is developed for the calculation of the surface plasmon frequency of a system of interacting nanospheres for arbitrary values of interparticle distances. In addition to having a simple and physically clear form, the final ...

2009

Accordabilité de la réponse optique des cristaux photoniques par infiltration de matériaux organiques

Pascale El-Kallassi

Photonic crystals are stuctures in which the refractive index varies periodically on the wavelength scale in one, two or three dimensions. Due to interference effects, these structures can forbid light propagation over a large spectral range called "the ph ...

EPFL2009

Intracellular nanomanipulation by a photonic-force microscope with real-time acquisition of a 3D stiffness matrix

Michaël Unser, László Forró, Giovanni Dietler, Andrzej Kulik, Philippe Thévenaz, Gérard Gremaud, Sylvia Jeney, Elena Bertseva, Stefania Puttini, Amardeep Singh

A traditional photonic-force microscope (PFM) results in huge sets of data, which requires tedious numerical analysis. In this paper, we propose instead an analog signal processor to attain real-time capabilities while retaining the richness of the traditi ...

Institute of Physics2009

Impact of the residual disorder on the slow light regime in 1D and 2D photonic crystals structures

Romuald Houdré, Nicolas Le Thomas

We experimentally investigate the effect of residual disorder on the dispersion curve of light near a band edge. A Fourier space imaging technique accurately distinguishes the propagating regime from evanescent regime in planar photonic crystal. (C) 2009 O ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Nonlinear Optical Spectroscopy of Soft Matter Interfaces

Sylvie Roke

Soft matter consists of complex molecules that can undergo drastic structural transformations under mild changes of chemical and physical conditions. Since a wide variety of chemical, physical and biological processes occur at soft matter interfaces, they ...

2009

Exploiting Substrate Stress To Modify Nanoscale SAM Patterns

Francesco Stellacci

We describe a simple method based on postadsorption substrate stress induction to modify and control nanoscale phase-separated patterns formed in self-assembled monolayers. We show using mesoscale computer simulations and experiments that this method helps ...

2009

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