Resonant type mass sensor
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United States of America Patent
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May 5, 2015
Grant Date -
Aug 21, 2014
app pub date -
Nov 15, 2013
filing date -
Feb 16, 2013
priority date (Note) -
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Abstract
A separate excitation and high sensitive resonant type mass sensor is provided. The resonant type mass sensor 1 includes: an oscillator 3; an vibrator 2 placed on the oscillator 3; and a detecting unit 5 for detecting the resonant frequency of the vibrator 2, and is characterized in that the vibrator 2 and the oscillator 3 are not coupled mechanically and that the vibrator 2 is not mechanically coupled to any members. The vibration of the vibrator 2 is represented by a standing wave. The vibrator 2 includes a molecular recognition means for recognizing the molecules of a substance to be measured. The molecular recognition means may collect specific molecules by antigen-antibody reaction. The vibrator 2 may include at least a magnetizable part. To the magnetizable part, magnetic beads 26, to which an antibody or antigen is immobilized, may be adsorbed magnetically. The detecting unit 5 is made up of a light-emitting device and a photo-sensitive device, and may include a means to detect any one of frequency, displacement, velocity, and acceleration.
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