High density array fabrication and readout method for a fiber optic biosensor

US5690894A · kind A · utility

Assignee

• The Regents of the University of California · US

Inventors

• Daniel Pinkel · Lafayette, US
• Joe W. Gray · Livermore, US

Key dates

• Filing date: May 23, 1995
• Grant date: Nov 25, 1997
• Expiry date: May 23, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/04
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to the fabrication and use of biosensors comprising a plurality of optical fibers each fiber having attached to its "sensor end" biological "binding partners" (molecules that specifically bind other molecules to form a binding complex such as antibody-antigen, lectin-carbohydrate, nucleic acid-nucleic acid, biotin-avidin, etc.). The biosensor preferably bears two or more different species of biological binding partner. The sensor is fabricated by providing a plurality of groups of optical fibers. Each group is treated as a batch to attach a different species of biological binding partner to the sensor ends of the fibers comprising that bundle. Each fiber, or group of fibers within a bundle, may be uniquely identified so that the fibers, or group of fibers, when later combined in an array of different fibers, can be discretely addressed. Fibers or groups of fibers are then selected and discretely separated from different bundles. The discretely separated fibers are then combined at their sensor ends to produce a high density sensor array of fibers capable of assaying simultaneously the binding of components of a test sample to the various binding partners on th…