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QCM-based sensors

Rizzo, S., F. Sannicolo, T. Benincori, G. Schiavon, S. Zecchin, and G. Zotti. 2004. Cahx[4]arene-functionalized poly-cyclopenta[2,l-fe3,4-b jbithiophcMCS with good recognition ability and selectivity for small organic molecules for application in QCM-based sensors. Italic NOT ALLOWEDJ Mater Chem 14 1804-1811. [Pg.546]

Fig. 11.3 Response to isopropyl alcohol (IPA) of QCM-based sensors with electrosprayed MOF film (Reprinted with permission from Khoshaman and Bahreyni 2012, Copyright 2012 Elsevier)... Fig. 11.3 Response to isopropyl alcohol (IPA) of QCM-based sensors with electrosprayed MOF film (Reprinted with permission from Khoshaman and Bahreyni 2012, Copyright 2012 Elsevier)...
Table 3.8 A summary of the lifetimes of the coating studied during work operating of QCM-based sensors... Table 3.8 A summary of the lifetimes of the coating studied during work operating of QCM-based sensors...
Polycyclic aromatic hydrocarbons (PAHs) in water Phloroglucinol and triisocyanate MEP-based sensors (QCM, SAW and optical transducers) 30 ng/L (ppt level) Dickert et al., 1999... [Pg.78]

In this entry, we focus on the discussion of the platform technology for electrochemical sensors, metal oxide semiconductive (MOS) sensors, and piezoelectric based quartz crystal microbalance (QCM) sensors. There are other types of chemical sensors, such as optical sensors, Schottky diode based sensors, calorimetric sensors, field-effect transistor (FET) based sensors, surface acoustic wave sensors, etc. Information of these specific sensors can be found elsewhere and in current journals on sensor technologies. Because of the increasing importance of microfabricated sensors, a brief discussion of microsensors is also given. [Pg.833]

Among piezoelectric based sensors, QCM represents a major device. A quartz crystal with a noncentro-symmetric space group will have a dipole associated with the orientation of the atoms. When under stress, the crystal exhibits a charge separation because of the displacement of its atoms. The converse effect has also been proven. It has been demonstrated that an applied alternating electric field will cause a vibration in a quartz crystal that in turn results in the generation of acoustic standing waves. Also, the crystal shows a tendency to vibrate at a characteristic resonant frequency. [Pg.836]

A typical profile of a QCM-based DNA sensor signal is reported in Fig. 1, where the addition of complementary sequences leads to the formation of the double helix and causes an increase in the mass loading at the sensor surface, recorded as a decrease in the frequency shift of the crystal. [Pg.212]

QCM Research (Laguna Beach, CA) offers several crystal-based sensors including the mark 16m QCM surface film sensor. The sensor has a unique oscillator/mixer hybrid chip that allows operation at temperatures as low as 10 K. In addition, the company offers a computer-operated instrument that can handle and display up to four sensors. [Pg.488]

Quartz crystal microbalance (QCM)-based SO2 gas sensors were fabricated using amino-functionalized poly(styrene-co-chloromethyl styrene) derivatives [110]. SO2 can be absorbed by the polymer s amine groups, which causes the mass to change such that it can be detected by the QCM. The sensor reaches equilibrium within 50 min in 50 ppm SO2. The sensors exhibit complete... [Pg.409]

When compared to other analysis methodologies such as surface plasmon resonance (SPR), quartz crystal microbalance (QCM) or impedance (EIS), voltammetry-based sensors provide short response time, less-expensive analysis about immobilization of molecules, and in many analj es they allow real-time measurements. [Pg.396]

Electronic noses The so-called electronic noses consist of chemical gas sensors that are able to monitor changes in the offgas composition of fermentation processes. The different sensors of electronic noses are based on conductive polymers (CP), metal oxide semiconductors (MOS), metal oxide semiconductor field effect transistors (MOSFET), or quartz crystal microbalance (QCM). CP-based sensors use the electrochemical properties of polymers like polypyrrole or polyindole. The absorbance of selected molecules of the off-gas into the polymer film causes changes in the sensors conductivity. MOS sensors possess an electrochemically active surface of metal oxides like tin oxide or copper oxide. The sensitivity... [Pg.3903]

Ding B, Kikuchi M, Li C, Shiratori S (2006a) Electrospun nanofibrous polyelectrolytes membranes as high sensitive coatings for QCM-based gas sensors. In Dirote EV (ed) Nanotechnology at the leading edge. Nova Science Publishers. New York, USA, pp 1-28... [Pg.45]

The application of cross-linker can produce other effects as well. For example, Matsuguchi et al. (2003) analyzed the influence of cross-linker on the characteristics of QCM-based SO sensors and found that sensors with cross-linked structure had lower sorption ability but faster sorption/desorption rates. The latter is known to be very important for sensors designed for in situ measurements. In the case of poly(styrene-co-chloromethyl styrene), the use of the cross-linked structure clearly increased the sensitivity to NOj of piezoelectric devices (Matsuguchi et al. 2005). [Pg.344]


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See also in sourсe #XX -- [ Pg.9 , Pg.125 , Pg.126 , Pg.149 , Pg.150 , Pg.157 , Pg.159 , Pg.171 ]




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