Patents by Inventor Jeffery M. Lauerhaas

Jeffery M. Lauerhaas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for detection of chemicals by reversible quenching of silicon photoluminescence
    Patent number: 5338415
    Abstract: An n-type silicon (Si) wafer is galvanostatically etched in a hydrofluoric acid (HF)-containing solution while being illuminated with a 300 watt tungsten light source to form porous silicon with luminescent properties. Photoluminescence of the porous silicon is monitored using a short wavelength visible or ultraviolet light source and a monochromator/CCD detector assembly. Upon exposure to organic solvents, the photoluminescence is quenched. Within seconds of removal of the solvent, the original intensity is recovered and further exposure of the porous silicon to organic solvents will again result in quenching of the luminescence.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: August 16, 1994
    Assignee: The Regents of the University of California
    Inventors: Michael J. Sailor, Grace Credo, Julie Heinrich, Jeffery M. Lauerhaas