Permeable nanoparticle reflector

US7906223B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Neal A. Rakow · Woodbury, US
• Dora M. Paolucci · Windom, US
• Moses M. David · Woodbury, US
• Michael S. Wendland · North St. Paul, US
• John E. Trend · Windom, US
• Richard J. Poirier · White Bear Lake, US

Key dates

• Filing date: Sep 11, 2006
• Grant date: Mar 15, 2011
• Expiry date: Dec 1, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/425
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optically-responsive multilayer reflective article is formed by applying a dilute solution or suspension of metallic nanoparticles to an optically-responsive detection layer. The solution or suspension is allowed to dry to form a semicontinuous liquid- or vapor-permeable light-reflective layer that will permit a liquid or vapor analyte to pass through the light-reflective layer to cause an optically-responsive change in the detection layer in the presence of the analyte.