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US 9,960,238 B2Granted
Nanopillar field-effect and junction transistors with functionalized gate and base electrodes
AssigneesCalifornia Institute of Technology, Sanofi
InventorsAditya Rajagopal, Chieh-feng Chang, Oliver Plettenburg, Stefan Petry, Axel Scherer, Charles L. Tschirhart
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Abstract
Systems and methods for molecular sensing are described. Molecular sensors are described which are based on field-effect or bipolar junction transistors. These transistors have a nanopillar with a functionalized layer contacted to either the base or the gate electrode. The functional layer can bind molecules, which causes an electrical signal in the sensor.
Claims19
A structure for sensing molecules, the structure comprising:
- a semiconductor substrate;
- an emitter region in the semiconductor substrate, the emitter region comprising a first doped semiconductor region;
- a base region in the semiconductor substrate, the base region comprising a second doped semiconductor region;
- a collector region in the semiconductor substrate, the collector region comprising a third doped semiconductor region;
- an emitter electrode, contacted to the emitter region;
- a collector electrode, contacted to the collector region;
- a nanopillar base region, the nanopillar base region comprising at least one nanopillar, formed between the emitter region and the collector region;
- and
- a functionalized base electrode comprising a functionalizing agent, the functionalized base electrode being on a top area of the nanopillar base region.
6 more elements
Dependencies are inferred from the claim text.