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Magnetic Porous Silicon Photonic Crystal

Technology Application

Possible application areas include MEMS devices, microfluidic mixing, targeted drug/enzyme delivery, biological screening, and microfluidic tagging.

Detailed Technology Description

University researchers have demonstrated magnetically switchable micron-sized photonic crystals that can be induced to flip between a colored photonic crystal face and a black, non-reflective surface in an oscillating magnetic field at rates exceeding 175 Hz. This property makes this an excellent material for use in display applications. In addition, magnetic "smart dust" has now been constructed with amphiphilic properties. This allows the micron-size crystals to self-align at the interface between immiscible liquids and effectively encapsulate suspended droplets. The addition of the magnetic property means that the particles can be used to manipulate microliter-scale droplets or cells by the application of an electromagnetic field, without the addition of ions or other impurities to the bulk liquid.

Supplementary Information

Patent Number: US8097173B2
Application Number: US2006632914A
Inventor: Sailor, Michael J. | Li, Yang Yang | Trujillo, Nathan | Dorvee, Jason
Priority Date: 19 Jul 2004
Priority Number: US8097173B2
Application Date: 18 Jan 2007
Publication Date: 17 Jan 2012
IPC Current: C23F000100 | B29D001100 | B32B000516 | B32B001500 | B44C000122
US Class: 216002 | 216022 | 216024 | 216056 | 428357 | 428402 | 428403 | 4286921 | 977838 | 977960 | 977962
Assignee Applicant: The Regents of the University of California
Title: Magnetic porous particles and method of making
Usefulness: Magnetic porous particles and method of making
Summary: Used in the fabrication of magnetic porous particles used to control, move, and/or deliver small volumes of liquids and solids associated with the particles, preferably useful in the field of display devices (claimed).
Novelty: Fabrication of magnetic porous particles used to control, move, and/or deliver small volumes of liquids comprises etching substrate to create film having porous photonic structure, dividing film into particles, and magnetizing film