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Plasmonic Sensor Improves Detection of Cancer Biomarkers

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A novel plasmonic sensor has demonstrated the ability to detect the presence of the cancer biomarker carcinoembryonic antigen (CEA) to the magnitude of one nanogram per milliliter. According to researchers, this is a significant improvement over current surface plasmon resonance systems, and a dynamic range that is clinically relevant for human CEA levels. The device combines two sensing methods to achieve a sensor design that shows an interactive plasmonic-photonic resonance effect. A 3D multilayer nanocavity in a nanocup array allows for light to be stored in the cavity. Plasmonic...Read full article

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    Published: June 2017
    Glossary
    plasmonics
    Plasmonics is a field of science and technology that focuses on the interaction between electromagnetic radiation and free electrons in a metal or semiconductor at the nanoscale. Specifically, plasmonics deals with the collective oscillations of these free electrons, known as surface plasmons, which can confine and manipulate light on the nanometer scale. Surface plasmons are formed when incident photons couple with the conduction electrons at the interface between a metal or semiconductor...
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
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