Simple and ultrafast resonance frequency and dissipation shift measurements using a fixed frequency drive
Simple and ultrafast resonance frequency and dissipation shift measurements using a fixed frequency drive
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DOI：
10.1016/j.snb.2018.11.052
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发表时间：
2019-02-15
影响因子：
8.4
通讯作者：
Ghosh, Sourav K.
中科院分区：
文献类型：
--
作者：
Guha, Arnab;Sandstrom, Niklas;Ghosh, Sourav K.
提出了一种确定机械振子共振频率和损耗的新方法。利用巴特沃斯-范戴克等效电路推导出的解析表达式允许直接从在固定的驱动幅度和频率下采集的每个阻抗数据点确定谐振频率和损耗，而不需要像传统的阻抗或衰荡分析方法那样进行数值拟合或测量死区时间。这使超高的时间分辨率和卓越的噪声性能与相对简单的仪器。在14.3 MHz石英晶体谐振器(QCR)上成功地用阻抗分析方法对惯性和粘性加载实验进行了定量验证。测量了液体中硫醇自组装单分子膜上快速针触的共振频率漂移，时间分辨率为112u S，比报道的最快的石英晶体微天平提高了近两个数量级。这种简单快速的基于固定频率驱动(FFD)的确定谐振频率和损耗的方法潜在地更容易被多路复用，并可在提供规模经济的单个硅芯片上实现。
A new method for determination of resonance frequency and dissipation of a mechanical oscillator is presented. Analytical expressions derived using the Butterworth-Van Dyke equivalent electrical circuit allow the determination of resonance frequency and dissipation directly from each impedance datapoint acquired at a fixed amplitude and frequency of drive, with no need for numerical fitting or measurement dead time unlike the conventional impedance or ring-down analysis methods. This enables an ultrahigh time resolution and superior noise performance with relatively simple instrumentation. Quantitative validations were carried out successfully against the impedance analysis method for inertial and viscous loading experiments on a 14.3 MHz quartz crystal resonator (QCR). Resonance frequency shifts associated with the transient processes of quick needle touches on a thiol self-assembled-monolayer functionalised QCR in liquid were measured with a time resolution of 112 mu s, which is nearly two orders of magnitude better than the fastest reported quartz crystal microbalance. This simple and fast fixed frequency drive (FFD) based method for determination of resonance frequency and dissipation is potentially more easily multiplexable and implementable on a single silicon chip delivering economies of scale.