Sensitive and selective method and device for the detection of trace amounts of a substance
申请人:Dayagi Y. Yohai
公开号:US20070117983A1
公开(公告)日:2007-05-24
A piezoelectric crystal element and a sensor utilizing the same are presented for use in a sensor device for identifying at least one foreign material from environment. The crystal element comprises at least one crystal resonator in the form of a inverted mesa structure, which has a membrane-like region and has a certain resonance frequency value. A surface region of the crystal resonator is modified by reactive molecules of a kind capable of interacting with the foreign material to yield a reaction product that effects a change in the resonance frequency of the crystal resonator from said certain resonance frequency value. This change is indicative of the identity and quantity of the foreign material.
提供了一种压电晶体元件和利用该元件的传感器,用于用于识别环境中至少一种外部材料的传感器装置。晶体元件包括至少一个晶体谐振器,其呈倒置台形结构,具有类似薄膜的区域,并具有特定的共振频率值。晶体谐振器的表面区域通过能够与外部材料相互作用以产生影响晶体谐振器的共振频率从所述特定共振频率值变化的反应产物的反应分子进行修改。这种变化表明了外部材料的身份和数量。