| US 7,556,774 B2 | ||
| Optochemical sensor and method of making the same | ||
| Neal A. Rakow, Woodbury, Minn. (US); Michael S. Wendland, North St. Paul, Minn. (US); Michael C. Palazzotto, Woodbury, Minn. (US); Dora M. Paolucci, St. Paul, Minn. (US); Richard J. Poirier, White Bear Lake, Minn. (US); Stefan H. Gryska, Woodbury, Minn. (US); John E. Trend, St. Paul, Minn. (US); and Moses M. David, Woodbury, Minn. (US) | ||
| Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US) | ||
| Filed on Dec. 21, 2005, as Appl. No. 11/275,268. | ||
| Prior Publication US 2007/0140907 A1, Jun. 21, 2007 | ||
| Int. Cl. G01N 21/00 (2006.01) | ||
| U.S. Cl. 422—82.05 [422/55; 422/58; 422/60; 422/82.09; 422/86] | 21 Claims |
| 1. 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 gold/palladium alloy and having a network of fine irregular cracks therein; and
heating at least the detection layer and semi-reflective metallic layer in the presence of molecular oxygen at a temperature
sufficient to cause the cracks to widen.
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