Biosensors with porous dielectric surface for fluorescence enhancement and methods of manufacture
First Claim
1. In a photonic crystal biosensor adapted for detection of a sample labeled with a fluorescent label, the biosensor having a periodic surface grating structure and a dielectric material deposited on the periodic surface grating structure, the dielectric material providing a surface upon which the sample is deposited, the improvement comprising:
- the surface of the biosensor comprising a porous dielectric structure in the form of a multitude of closely spaced raised structures made from a dielectric material, wherein the closely spaced raised structures are surrounded by adjacent spaces, and wherein the raised structures and adjacent spaces providing an enhanced surface area available for binding of the sample to the biosensor.
4 Assignments
0 Petitions
Accused Products
Abstract
Biosensors are disclosed which include a surface for binding to sample molecule to the biosensor in the form of a porous, thin film of dielectric material, e.g., TiO2. In one example the porous, thin film is in the form of a multitude of sub-micron sized rod-like structures (“nanorods”) projecting therefrom. In one embodiment, the biosensor is in the form of a photonic crystal biosensor. The approach of depositing a thin film of dielectric nanorods may be applied to any enhanced fluorescence biosensor surface structure, including 1-dimensional photonic crystals, 2-dimensional photonic crystals, 3-dimensional photonic crystals, surface plasmon resonance surfaces, planar waveguides, and grating-coupled waveguides. The dielectric nanorod structures can be fabricated on the surface of a biosensor by the glancing angle deposition technique (GLAD).
-
Citations
21 Claims
-
1. In a photonic crystal biosensor adapted for detection of a sample labeled with a fluorescent label, the biosensor having a periodic surface grating structure and a dielectric material deposited on the periodic surface grating structure, the dielectric material providing a surface upon which the sample is deposited, the improvement comprising:
the surface of the biosensor comprising a porous dielectric structure in the form of a multitude of closely spaced raised structures made from a dielectric material, wherein the closely spaced raised structures are surrounded by adjacent spaces, and wherein the raised structures and adjacent spaces providing an enhanced surface area available for binding of the sample to the biosensor. - View Dependent Claims (2, 3, 4)
-
5. In a surface Plasmon resonance biosensor, adapted for detection of a sample, the improvement comprising:
a porous dielectric structure deposited on the surface Plasmon resonance biosensor, the porous dielectric structure providing a surface upon which the sample is deposited, and wherein the porous dielectric structure comprises a multitude of nanorods made from a dielectric material surrounded by adjacent spaces, the dielectric nanorods and adjacent spaces providing an enhanced surface area available for binding of the sample to the biosensor.
-
6. In a planar waveguide, adapted for detection of a sample, the improvement comprising:
a porous dielectric structure deposited on the planar waveguide, the porous dielectric structure providing a surface upon which the sample is deposited, wherein the porous dielectric structure comprises a multitude of nanorods made from a dielectric material surrounded by adjacent spaces, the nanorods and adjacent spaces providing an enhanced surface area available for binding of the sample to the planar waveguide.
-
7. In a grating-coupled waveguide, adapted for detection of a sample, the improvement comprising:
a porous dielectric structure deposited on the grating-coupled waveguide, the porous dielectric structure providing a surface upon which the sample is deposited, and wherein the porous dielectric structure comprises a multitude of nanorods made from a dielectric material surrounded by adjacent spaces, the nanorods and adjacent spaces providing an enhanced surface area available for binding of the sample to the grating-coupled waveguide.
-
8. A photonic crystal biosensor comprising:
-
a substrate layer; a periodic grating applied to the substrate layer; a relatively high index of refraction layer deposited on or above the periodic grating layer; and a porous dielectric structure comprising a dielectric material deposited on the relatively high index of refraction layer, the porous dielectric structure in the form of a multitude of closely spaced raised structures made from said dielectric material, the closely spaced raised structures surrounded by adjacent spaces, the raised structures and adjacent spaces providing an enhanced surface area available for binding of the sample to the biosensor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 20, 21)
-
-
16. A method of manufacturing a biosensor comprising the steps of:
-
providing a biosensor having an upper surface; and depositing a dielectric material on the upper surface of the biosensor so as to form a porous dielectric structure, the porous dielectric structure forming a surface for receiving a sample deposited on the biosensor, the porous dielectric structure in the form of a multitude of closely spaced raised structures made from a dielectric material, the closely spaced raised structures surrounded by adjacent spaces, the raised structures and adjacent spaces providing an enhanced surface area available for binding of the sample to the biosensor. - View Dependent Claims (17, 18, 19)
-
Specification