METHOD OF SEEKING AT LEAST ONE ANALYTE IN A MEDIUM LIKELY TO CONTAIN IT
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United States of America Patent
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Issued Date -
Sep 15, 2011
app pub date -
Sep 10, 2009
filing date -
Sep 11, 2008
priority date (Note) -
Abandoned
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Abstract
A new method of seeking the presence of an analyte bound to a probe, wherein a periodic geometric pattern (24), constituting a diffractive system (2), is formed by alternating areas including a probe A, and areas not including the probe A. The diffractive system (2) is made to be diffractive before a sensitization step, i.e. a step during which a probe is temporarily brought into contact with a medium likely to contain an analyte and during which the possible analyte binds to the probe. The method includes at least the following steps: measurement of a power P.sub.1 of a first-order diffraction beam of a diffraction field produced by the diffractive system, with the probe unsensitized, sensitizing the probe A, measurement of a power P.sub.1a of a first-order diffraction beam of a diffraction field produced by the diffractive system, and comparison of the measured powers P.sub.1 and P.sub.1a.
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