Apparatus and method for quantifying binding and dissociation kinetics of molecular interactions
First Claim
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1. An apparatus for quantifying binding and dissociation kinetics of molecular interactions, the apparatus comprising:
- a micro flow path structure comprisinga support,a substrate on the support and having a semiconductor material,a dielectric film on the substrate,a cover unit on the support and having an incident window and a reflection window respectively on one side and the other side and,said support defining micro flow paths between the support and the cover unit, the micro flow paths comprising a plurality of inflow paths, and a plurality of outflow paths on one side and the other side of the support, respectively,the micro flow paths of multiples channels having a plurality of barrier ribs in an inner face of the cover unit and to connect the inflow paths and the outflow paths, respectively;
a sample injection unit for forming a binding layer of samples on the dielectric film by injecting a buffer solution comprising the samples of a bio material into the micro flow paths;
a polarization generation unit for radiating incident light, polarized through the incident window, to the binding layer at an angle of incidence θ
satisfying a p-wave non-reflecting condition; and
a polarization detection unit for detecting a change in a polarization of reflected light of the binding layer incident through the reflection window;
each of the incident window and the reflection window of the cover unit having a curved shell form;
the incident light and the reflected light being incident on the incident window and the reflection window, respectively, adjacent a vertical angle of the extent that a polarization state of each of the incident light and the reflected light is not greatly changed.
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Abstract
The present invention relates to an apparatus for quantifying the binding and dissociation kinetics of molecular interactions of small molecular bio materials with high sensitivity almost without the influence of a change in the reflective index resulting from a buffer solution by making polarized incident light incident on the binding layer of a bio material, formed in a thin dielectric film, so that the polarized incident light satisfies a p-wave non-reflecting condition and a quantifying method using the same.
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17 Claims
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1. An apparatus for quantifying binding and dissociation kinetics of molecular interactions, the apparatus comprising:
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a micro flow path structure comprising a support, a substrate on the support and having a semiconductor material, a dielectric film on the substrate, a cover unit on the support and having an incident window and a reflection window respectively on one side and the other side and, said support defining micro flow paths between the support and the cover unit, the micro flow paths comprising a plurality of inflow paths, and a plurality of outflow paths on one side and the other side of the support, respectively, the micro flow paths of multiples channels having a plurality of barrier ribs in an inner face of the cover unit and to connect the inflow paths and the outflow paths, respectively; a sample injection unit for forming a binding layer of samples on the dielectric film by injecting a buffer solution comprising the samples of a bio material into the micro flow paths; a polarization generation unit for radiating incident light, polarized through the incident window, to the binding layer at an angle of incidence θ
satisfying a p-wave non-reflecting condition; anda polarization detection unit for detecting a change in a polarization of reflected light of the binding layer incident through the reflection window; each of the incident window and the reflection window of the cover unit having a curved shell form; the incident light and the reflected light being incident on the incident window and the reflection window, respectively, adjacent a vertical angle of the extent that a polarization state of each of the incident light and the reflected light is not greatly changed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of quantifying binding and dissociation kinetics of molecular interactions, the method comprising:
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using a sample injection unit for injecting a buffer solution including samples of small molecular bio materials into micro flow paths of a micro flow path structure, the buffer solution including the samples of different concentrations and being injected into respective micro flow paths of the micro flow path structure including multiple channels; binding the samples to a dielectric film of the micro flow path structure for forming a binding layer, the samples being bound to a plurality of different self-assembled monolayers formed on the dielectric film for forming different binding layers; using a polarization generation unit for polarizing light and making the polarized light incident on the binding layer at an angle of incidence to satisfy a p-wave non-reflecting condition through an incident window of the micro flow path structure; using reflected light from the binding layer being incident on a polarization detection unit through a reflection window of the micro flow path structure; and using the polarization detection unit for detecting a polarization state of the reflected light using at least one of ellipsometry and reflectometry. - View Dependent Claims (17)
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Specification