Piezoelectric chemical sensors (IUPAC Technical Report)

Buck, Richard P.; Lindner, Ernő; Kutner, Włodzimierz; Inzelt, György

doi:10.1351/pac200476061139

Cited by 79 publications

(27 citation statements)

References 71 publications

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“…interface assumption ignores many useful information such that the error of this equation will be one to three times lager than the theoretical value [4].…”

Section: Theoretical Model Of Qcmmentioning

confidence: 99%

Research and development of an integrated multi-parameter quartz crystal microbalance and surface plasmon resonance system

et al. 2010

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We developed a multi-parameter detection system that integrates both a quartz crystal microbalance (QCM) and a surface plasma resonance (SPR) system. A QCM is known to possess the capabilities of measuring both mass loading by frequency shift and stiffness by damping factor of the adsorption layer. However, the mass measured by using a QCM includes not only the true mass of the adsorption layer but also the water. On the other hand, a SPR is a well known technique which can be used to measure the true mass loading of the adsorption layer. By integrating these two techniques, we can simultaneously measure properties such as stiffness, conformation, and mass loading of the adsorption layer. To simplify the chip manufacturing procedures, this new detection system adopts a prism couple method which consists of a He-Ne laser, a prism, quartz and a power meter. In consideration of the light transmission issue, one side of the quartz was coated with ITO instead of gold. Preliminary results showed that this set-up can perform QCM and SPR techniques simultaneously. The experimental results matched well with the theoretical predictions.

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“…interface assumption ignores many useful information such that the error of this equation will be one to three times lager than the theoretical value [4].…”

Section: Theoretical Model Of Qcmmentioning

confidence: 99%

Research and development of an integrated multi-parameter quartz crystal microbalance and surface plasmon resonance system

et al. 2010

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“…The uniform distribution of the mass over the active area of the quartz plate is of importance since the differential mass sensitivity (c f ) varies across this area. For typically used round-shaped crystals [1,6,8,19]:…”

Section: Ii1022 the Quartz Crystal Nanobalancementioning

confidence: 99%

“…The deviation from the linearity regarding the m vs. Q function is related to the appearance of the viscoelastic effect. By the help of impedance measurements the viscoelastic characteristics of the surface film can also be tested [4,5,6,7,10]. In the absence of any deposition the change of the density and viscosity in the double layer or in the diffusion layer may cause 0.1-10 Hz frequency change.…”

Section: Ii1023 the Electrochemical Quartz Crystal Nanobalance (Eqcn)mentioning

confidence: 99%

“…By the help of the combined technique, the overall mass effect, that can be measured by EQCN, can be deconvoluted, i.e., the transport and sorption of different ionic and neutral species can be separated. QCN can also be used without the combination with electrochemical techniques in gas sensors, immunosensors, DNA biosensors, drug analysis, etc., by coating the crystal with a suitable reacting layer, e.g., antibodies in immunosensors [6,9].…”

Section: Ii101 Introductionmentioning

confidence: 99%

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Electrochemical Quartz Crystal Nanobalance

Inzelt

2009

Electroanalytical Methods

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The method of piezoelectric microgravimetry (nanogravimetry) using an electrochemical quartz crystal microbalance (EQCM) or nanobalance (EQCN) can be considered as a novel and much more sensitive version of electrogravimetry. The EQCN technique has become a widely used technique in several areas of electrochemistry, electroanalytical chemistry, bioelectrochemistry, etc. [1][2][3][4][5][6][7][8][9][10]. Obviously, mass changes occurring during adsorption, sorption, electrosorption, electrodeposition, or spontaneous deposition can be followed, which is very helpful for the elucidation of reaction mechanism via identification of the species accumulated on the surface. These investigations include metal and alloy deposition, underpotential deposition, electroplating, synthesis of conducting polymers by electropolymerization, adsorption of biologically active materials, and analytical determination of small ions and biomolecules. Of course, the opposite processes, i.e., spontaneous dissolution, electrodissolution, corrosion, can also be studied. Electrochemical oscillations, in which the formation and oxidation of chemisorbed molecular fragments play a determining role, have been studied, too. The majority of the investigations have been devoted to ion and solvent transport associated with the redox transformations of electrochemically active polymers. Similar studies have been carried out regarding polynuclear surface layers such as metal hexacyanometalates as well as inorganic and organic microcrystals of different compositions.The quartz crystal nanobalance (QCN) can be combined with practically any electrochemical methods, such as cyclic voltammetry, chronoamperometry, chronocoulometry, potentiostatic, galvanostatic, rotating disc electrode [11], or potentiometric measurements. The EQCN can be further combined with other techniques, e.g., with UV-Vis spectroscopy [12], probe beam deflection (PBD) [13], radiotracer [14], atomic force microscopy (AFM) [15], and scanning electrochemical microscopy (SECM) [16]. The concept and the instrumentation of G. Inzelt (B)

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“…[20]. For instance, plausible and well interpretable EQCM responses could be obtained in the case of ion and solvent transport associated with the electrode reactions and synthesis of electrochemically active polymer modified electrodes with relatively thick polymer films deposited on the surface of a substrate [21][22][23][24][25], in the case of the formation of biofilms [26] or self-assembling monolayers [27,28].…”

Section: The Eqcm Responsementioning

confidence: 99%