Nanolaminate Microfluidic Device for Mobility Selection of Particles
Michael P. Surh, William D. Wilson, Troy W. Barbee, Jr., Stephen M. Lane
U.S. Patent 7,118,661 B2
October 10, 2006
A microfluidic device is made from nanolaminate materials that are capable of electrophoretic selection of particles based on their mobility. In general, nanolaminate materials consist of alternate layers of two materials (one conducting, one insulating) that are made by sputter coating a flat substrate with a large number of layers. Specific subsets of the conducting layers are coupled to form a single, extended electrode, interleaved with other similar electrodes. Thereby, the subsets of conducting layers may be dynamically charged to create time-dependent potential fields that can trap or transport charged colloidal particles. The addition of time dependence is applicable to all geometries of nanolaminate electrophoretic and electrochemical designs from sinusoidal to nearly steplike.
Phasing Surface Emitting Diode Laser Outputs into a Coherent Laser Beam
John F. Holzrichter
U.S. Patent 7,120,184 B2
October 10, 2006
A system for generating a powerful laser beam includes a first laser element and at least one additional laser element having a rear laser mirror, an output mirror that is 100 percent reflective at normal incidence and less than 5 percent reflective at an input beam angle, and laser material between the rear laser mirror and the output mirror. The system includes an injector, a reference laser-beam source, an amplifier and phase conjugator, and a combiner.
Metal Hydride Fuel Storage and Method Thereof
Jeffrey D. Morse, Alan F. Jankowski, Conrad Yu
U.S. Patent 7,122,261 B2
October 17, 2006
A metal hydride fuel-storage cartridge has integrated resistive heaters that can be used in conjunction with fuel cells such as microelectromechanical systems–based fuel cells. The cartridge is fabricated using micromachining methods and thin- and thick-film materials synthesis techniques.
Method for Preparing a Solid-Phase Microextraction Device Using Aerogel
Fred S. Miller, Brian D. Andresen
U.S. Patent 7,125,580 B2
October 24, 2006
A sample collection substrate of aerogel or xerogel materials bound to a support structure is used as a solid-phase microextraction (SPME) device. The xerogels and aerogels may be organic or inorganic and doped with metals or other compounds to target specific chemical analytes. The support structure is typically formed of a glass fiber or a metal wire (stainless steel or Kovar). The devices are made by applying gel solution to the support structures and drying the solution to form aerogel or xerogel. Aerogel particles may be attached to the wet layer before drying to increase sample collection surface area. These devices are robust, stable in fields of high radiation, and highly effective at collecting gas and liquid samples while maintaining superior mechanical and thermal stability during routine use. Aerogel SPME devices are advantageous for use in gas chromatograph–mass spectrometer (GC-MS) analyses because of their lack of interfering background and tolerance of GC thermal cycling.