Graphene Optical Sensor
AssigneesEgypt Nanotechnology Center, International Business Machines Corporation
InventorsAli Afzali, Ageeth A. Bol, Amal Kasry, George S. Tulevski
Life of this patent
Estimating the term…
Abstract
A method of using an optical sensor, the optical sensor comprising a sensing surface comprising graphene layer, the sensing surface located on a substrate, includes determining a first optical absorption spectrum for the graphene layer by a spectrophotometer; adding an analyte, the analyte selected to cause a shift in the first optical absorption spectrum, to the graphene layer; determining a second optical absorption spectrum for the modified graphene layer by a spectrophotometer; determining a shift between the first optical absorption spectrum and the second optical absorption spectrum; and determining a makeup of the analyte based on the determined shift.
Claims20
An optical sensor, comprising:
- a substrate;
- and
- a sensing surface comprising a graphene layer located on the substrate, wherein the graphene layer is chemically modified with an analyte-specific binding substance.
A method of using an optical sensor, the optical sensor comprising a sensing surface comprising graphene layer, the sensing surface located on a substrate, the method comprising:
- determining a first optical absorption spectrum for the graphene layer by a spectrophotometer;
- adding an analyte, the analyte selected to cause a shift in the first optical absorption spectrum, to the graphene layer;
- determining a second optical absorption spectrum for the modified graphene layer by a spectrophotometer;
- determining a shift between the first optical absorption spectrum and the second optical absorption spectrum;
- and
- determining a makeup of the analyte based on the determined shift.
A method of making an optical sensor, the method comprising:
- forming a sensing surface comprising a graphene layer;
- transferring the graphene layer to a substrate;
- and
- chemically modifying the graphene layer with an analyte-specific binding substance.
Dependencies are inferred from the claim text.