Micromechanical calorimetric sensor

Details Micromechanical calorimetric sensor Micromechanical calorimetric sensor

G - Physics

01

N

G01N 25/20 (2006.01) B81B 3/00 (2006.01) G01N 25/48 (2006.01)

Patent

CA 2322387

A calorimetric sensor and method of detecting a reaction based on the heat evolved. A cantilever spring element (3) having a first surface (5) having a first thermal expansion coefficient and a second surface (9) having a second thermal expansion coefficient is coated with a reagent (7). Sample (13) reacts the reagent (7) and the heat evolved changes the temperature of the spring (3), causing the first and second surfaces (5, 9) to expand differently, resulting in a measurable deflection of the spring (3). A reference spring (15) may be provided.

L'invention concerne un capteur calorimètre et un procédé de détection d'une réaction selon la chaleur dégagée. Un élément (3) ressort cantilever présentant une première surface (5) ayant un premier coefficient de dilatation thermique et une seconde surface (9) ayant un second coefficient de dilatation thermique est revêtu d'un réactif (7). Un échantillon (13) fait réagir le réactif (7) et la chaleur dégagée modifie la température du ressort (3), provoquant une dilatation différente des première et seconde surfaces (5, 9), ce qui se traduit par un fléchissement mesurable du ressort (3). On peut prévoir un ressort (15) de référence.

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