USA As Represented by Secretary of the Navy

Other

Washington University

University of Louisville Research Foundation, Inc.

R Andrew McGill

Robert Furstenberg

Chris Kendziora

Michael Papantonakis

Viet K Nguyen

Todd H Stievater

Douglas B Chrisey

Alberto Pique

Courtney A Roberts

Jennifer L Stepnowski

Graham K Hubler

James S Horwitz

Bernadette A Higgins

Duane L Simonson

William S Rabinovich

Bradley R Ringeisen

Eric J Houser

Stanley Vincent Stepnowski

Dmitry A Kozak

Thomas Fischer

Tyler Huffman

Rekha Pai

David B Krizman

Jacob B Khurgin

Nicolas A Papanicolaou

Kevin M Walsh

F Keith Perkins

Michael A Markowitz

Robert E Bass

Eric S Snow

Anne W Kusterbeck

David R Mott

David Joseph Nagel

Michael J Martin

Mazyar Zeinali

Julia W Aebersold

Patrick Mills

Christopher Breshike

Scott A Holmstrom

Stan V Stepnowski

The present invention provides a method for spectroscopic imaging by illuminating a sample with a short infrared pulse, directing one or more probe beams to the sample, and measuring light that is reflected, transmitted, or re-emitted inelastically, where a spectrum is collocated by varying the wavelength of the infrared pulse and an image is collected by moving the sample and probe beam relative to each other as the steps are repeated multiple times to create a multidimensional spectroscopic image of the sample. Also disclosed are the related methods for analyzing the data and the related system for spectroscopic imaging.

Optically super-resolved infrared impulse spectroscopy (OSIRIS)—a technique for high contrast chemical imaging of chemical composition

The invention relates to strong hydrogen-bond acidic sorbents. The sorbents may be provided in a form that limits or eliminates intramolecular bonding of the hydrogen-bond acidic site between neighboring sorbent molecules, for example, by providing steric groups adjacent to the hydrogen-bond acidic site. The hydrogen bond site may be a phenolic structure based on a bisphenol architecture. The sorbents of the invention may be used in methods for trapping or detecting hazardous chemicals or explosives.

Bisphenol hypersorbents for enhanced detection of, or protection from, hazardous chemicals

Presented herein is a new concept of uniformly spin coating a flat surface with a stationary phase and creating a gas chromatography column by pressing a grooved lid, with micro-stamped ridges, down onto the coated substrate. The lids are molded out of commercially available rigid materials including epoxies so that when pressed onto a flat surface it will create an air tight seal. The epoxy material is rendered inert by a thin layer of gold.

Spin coated stationary phase microfabricated gas chromatographic columns

This application relates generally to a method and apparatus to deposit particles onto one or more coupons, and harvest particles from one or more coupons, which may beneficially provide a more uniform or localized distribution of particles over a specified area on each coupon. The application relates to a method and apparatus for depositing particles onto one or more coupons using a sieve. The application also relates to a method and apparatus for depositing particles onto one or more coupons using a dust storm. The particle loadings achieved on each coupon or across an individual coupon may be substantially uniform. The application further relates to a laser-based method and apparatus for transferring particles deposited at localized points on a source coupon to a different substrate for further use.

Processing of solid micron sized particles for rapid deposition on substrate surfaces with uniform particle distribution

A photo-thermal speckle spectroscopy device having an infrared laser, a visible laser, a foam, and a camera. The infrared and visible lasers are focused on the foam, which causes the visible laser to scatter. A camera records the speckle pattern, which shifts when the IR laser is turned on. The related method of photo-thermal speckle spectroscopy is also disclosed.

Laser speckle reduction and photo-thermal speckle spectroscopy

A method and system for rapid, label free nanoscale chemical imaging and tomography (3D) with multiplexing for speed, and engineered coherent illumination and detection to achieve 3-D resolution at twice the Abbe limit. A sample undergoes photo-thermal heating using a modulated infrared light source and the resulting probe beam modulation is measured with one or more visible laser probes. Varying the infrared wavelength results in a spectrum which characterizes the chemical composition of the sample. Optionally, inelastically scattered light generated as a result of the probe beam interacting with the sample is collected simultaneously to yield additional chemical information.

Rapid multiplexed infrared 3D nano-tomography

A speckle reduction instrument having a parabolic reflector and flat mirror to form a cavity-based unit. Laser light is collected and bounced around the cavity hitting a diffuser surface multiple times. The laser light that is highly coherent is converted into less-coherent but still bright light suitable for illumination in microscopes and other devices. Also disclosed is the related method for reducing speckle.

Speckle reduction instrument

A chemical detector for rapid, simultaneous detection of multiple chemicals including chemical warfare agents, toxic industrial chemicals, and explosives having one or more gas chromatography columns each with a chemosorbent or a chemo-reactive stationary phase and an infrared-transparent base, a bright infrared light source, a mechanism to direct the light source to any point along any of the columns, and an infrared sensor. Another disclosed detector has one or more gas chromatography columns each on the surface of a substrate having at least one infrared-transparent waveguide pattern, a bright infrared light source, and at least one ring resonator for each column, where each ring resonator is coated with a chemosorbent or a chemo-reactive stationary phase, and where each ring resonator spectroscopically probes the stationary phase. Also disclosed are the related methods for chemical detection.

Gas chromatographic 'in-column' spectroscopic analysis

A system and method for detecting an analyte includes a waveguide configured to receive a narrow-band laser signal; and a sorbent material covering an analyte detection region of the waveguide, wherein the sorbent material is configured to sorb the analyte and bring the analyte to an evanescent field of the waveguide, and wherein Raman scattering is produced by an interaction of the evanescent field and the analyte sorbed in the sorbent material along the analyte detection region of the waveguide, and the waveguide is further configured to collect the Raman scattering along the analyte detection region of the waveguide, wherein the collected Raman scattering indicates a type of the analyte.

Waveguide-enhanced Raman scattering spectroscopy of analytes using sorbents

A non-destructive method for chemical imaging with &#x2dc;1 nm to 10 &#x3bc;m spatial resolution (depending on the type of heat source) without sample preparation and in a non-contact manner. In one embodiment, a sample undergoes photo-thermal heating using an IR laser and the resulting increase in thermal emissions is measured with either an IR detector or a laser probe having a visible laser reflected from the sample. In another embodiment, the infrared laser is replaced with a focused electron or ion source while the thermal emission is collected in the same manner as with the infrared heating. The achievable spatial resolution of this embodiment is in the 1-50 nm range.

Chemical mapping using thermal microscopy at the micro and nano scales

Growing community of inventors

Lorton, VA, United States of America

R Andrew McGill