Optical sensor comprising diffraction gratings with functionalized pores and method of detecting analytes using the sensor
US8349617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2010 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Jan 22, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/143333
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Diffraction gratings comprising a substrate with protrusions extending therefrom. In one embodiment, the protrusions are made of a porous material, for example porous silicon with a porosity of greater than about 10%. The diffraction grating may also be constructed from multiple layers of porous material, for example porous silicon with a porosity of greater than about 10%, with protrusion of attached thereto. In some embodiments the protrusions may be made from photoresist or another polymeric material. The gratings are the basis for sensitive sensors. In some embodiments, the sensors are functionalized with selective binding species, to produce sensors that specifically bind to target molecules, for example chemical or biological species of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.