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This work reports on direct detection of biomolecular adsorption events in liquid media using piezoelectric rotational mode disk resonators. Piezoelecrically transduced rotational mode silicon disk resonators with resonant frequencies in the 2.0–8.0MHz range capable of operating in liquid are utilized as direct real-time mass balances. The resonant frequency of the resonators was recorded in real-time...
We present microscale silicon resonators with nanoscale pores for increased surface area, which are capable of providing enhanced sensitivity in vapor sensors. Increased mechanical stability and detection performance are also achieved by keeping parts of the resonating device nonporous and adding a receptor coating. We demonstrate improvements up to 165% and 654% in resonator sensitivity to isopropyl...
This paper reports experimental results on the selectivity and long-term reliability of the explosive-vapor-trace detection based on antigen-antibody binding on a film bulk acoustic resonator (FBAR). An FBAR coated with specific antibody was shown to be able to detect vapor trace of TNT (Trinitrotoluene) or RDX (Cyclotrimethylenetrinitramine) without any pre-concentrator [1], but its false alarm rate...
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