Optochemical sensor and method of making the same

US7556774B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

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

Key dates

• Filing date: Dec 21, 2005
• Grant date: Jul 7, 2009
• Expiry date: Sep 19, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/7779
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of making an optochemical sensor, the method comprising: providing a reflective substrate having a major surface; affixing a detection layer comprising at least one intrinsically microporous polymer to at least a portion of the major surface; depositing a substantially continuous semi-reflective metallic layer on at least a portion of the detection layer, the semi-reflective metallic layer comprising palladium and having a network of fine irregular cracks therein; and heating the detection layer and semi-reflective metallic layer in the presence of molecular oxygen at a temperature sufficient to cause the cracks to widen. Sensors prepared according to method are also disclosed.