Crystalline colloidal arrays responsive to an activator

G - Physics – 01 – N

Patent

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G01N 21/77 (2006.01) G01N 21/47 (2006.01)

Patent

CA 2676734

A method of producing a radiation diffractive sensor that diffracts radiation according to Bragg s law is disclosed. The sensor is produced by forming an ordered periodic array of particles on a substrate, coating the array of particles with a polymeric matrix, curing the matrix to fix the array of particles within the matrix and contacting the fixed array with an activator, wherein the activator shifts the wavelength of radiation diffracted by the sensor from a first wavelength to a second wavelength.

L'invention porte sur une méthode de production d'un détecteur à diffraction de rayonnement qui assure la diffraction selon la loi de Bragg. Le détecteur est produit: en formant un réseau périodique ordonné de particules sur un substrat; en revêtant ledit réseau d'une matrice de polymère; en faisant durcir la matrice pour fixer le réseau dans la matrice; et en mettant le réseau fixé en contact avec un activateur qui décale la longueur d'onde du rayonnement diffracté par le détecteur en la faisant passer d'une première valeur à une deuxième valeur.

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