Hall effect sensor with graphene detection layer
US-2015102807-A1 · Apr 16, 2015 · US
Graphene-based magnetic hall sensor for fluid flow analysis at nanoscale level
US9702748B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9702748-B2 |
| Application number | US-201514944766-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2015 |
| Priority date | Oct 14, 2015 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Abstract
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A method of detecting a particle comprises magnetizing a particle using an AC magnetic field; generating an AC voltage in a sensing device having a conductive substantially 2-dimensional lattice structure from the magnetized particle; superimposing a DC magnetic field on the generated AC voltage in the sensing device; and measuring an AC Hall voltage at the sensing device.
First claim
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What is claimed is: 1. A method of detecting a particle, comprising: magnetizing a particle using an AC magnetic field; generating an AC voltage, from the magnetized particle, in a sensing device having a conductive substantially 2-dimensional lattice structure; superimposing a DC magnetic field on the generated AC voltage in the sensing device; and measuring an AC Hall voltage at the sensing device. 2. The method of claim 1 , wherein generating an AC voltage, from the magnetized particle, in a sensing device comprises applying an AC voltage across an AC coil on the sensing device. 3. The method of claim 1 , wherein superimposing a DC magnetic field on the generated AC voltage in the sensing device comprises applying a DC voltage across a DC coil on the sensing device. 4. The method of claim 3 , wherein superimposing a DC magnetic field on the generated AC voltage in the sensing device increases the AC Hall voltage for measuring at the sensing device as compared to a generated AC voltage in the sensing device without a DC magnetic field superimposed thereon. 5. The method of claim 1 , further comprising applying a source voltage across opposing ends of the conductive substantially 2-dimensional lattice structure. 6. The method of claim 1 , wherein generating an AC voltage in a sensing device having a conductive substantially 2-dimensional lattice structure from the magnetized particle comprises generating an AC voltage in a graphene element biased with a voltage.
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Classifications
of molecules labeled with magnetic beads (magnetic particles for bio assay G01N33/54326) · CPC title
- G01R33/072Primary
Constructional adaptation of the sensor to specific applications · CPC title
Measuring the time taken to traverse a fixed distance · CPC title
for detecting magnetic beads used in biochemical assays (concerning the assays G01N33/54326; sensors therefor G01R33/1269; automatic analysers therefor G01N35/0098) · CPC title
Hall effect devices · CPC title
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- What does patent US9702748B2 cover?
- A method of detecting a particle comprises magnetizing a particle using an AC magnetic field; generating an AC voltage in a sensing device having a conductive substantially 2-dimensional lattice structure from the magnetized particle; superimposing a DC magnetic field on the generated AC voltage in the sensing device; and measuring an AC Hall voltage at the sensing device.
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification G01R33/072. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 11 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).