In-situ monitoring of microrheology on electrochemical deposition using an advanced quartz crystal analyzer and its application to polypyrrole deposition

Muramatsu, Hiroshi; Ye, X.; Suda, Masayuki; Sakuhara, T.; Ataka, Tatsuaki

doi:10.1016/0022-0728(92)80085-i

Cited by 76 publications

(40 citation statements)

References 27 publications

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“…3c. The F-R diagram is supported by experimental results from the electrochemical deposition of polypyrrole, in which the ratio of the resonant frequency change to resonant resistance change varied as the viscoelasticity of the film changed, as a result of swelling [26]. Figure 3c gives additional information on the viscosity change of the coated viscoelastic film.…”

Section: Principlementioning

confidence: 88%

“…Phase-transition phenomena of liquid crystals [21,22], lipid multi-bilayer films [23], Langmuir-Blodgett (LB) films [24], and blend polymers [25] have also been studied using the quartz crystal and surface acoustic wave devices. The importance of studying viscoelastic phenomena with coated films originated, especially, in the field of the electrochemical analysis, from the desire to clarify the causes of the resonant frequency change in viscoelastic films [17,26]. This can be achieved by measuring the resonant resistance (or the resonant admittance) of the quartz crystal coated with thin films [27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

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Quartz-crystal sensors for biosensing and chemical analysis

Muramatsu

Kim

Chang

2002

Analytical and Bioanalytical Chemistry

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The principle and applications of quartz-crystal sensors based on the three basic concepts for mass, viscosity, and viscoelastic changes are reported. In the general discussion the realization of a resonant frequency-resonant resistance diagram is described in detail. As an example of application to mass sensing, gas sensing with a carbon-coated quartz crystal is reported. Determination of the blood coagulation factor is used as an example of the application to viscosity sensing. As an example of viscoelastic measurement, an ion-exchange polymer-coated quartz crystal is investigated to show that viscoelasticity changes more than mass in the transport process. The possibility of developing new biosensors and chemical sensors is discussed on the basis of these results.

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Section: Principlementioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Quartz-crystal sensors for biosensing and chemical analysis

Muramatsu

Kim

Chang

2002

Analytical and Bioanalytical Chemistry

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“…A 930-Hz frequency change, corresponding with the viscoelastic change in the PPy film, was estimated from the respective value resulting from the EQCM measurement. 98 The total 2470 Hz (= 3400 -930 Hz) increase corresponds to 4.9 nmol of TC extracted from the film through overoxidation. The frequency increases in the first and second steps are associated with the PPy overoxidation process at 190 s (1.4 nmol = 4.9 nmol × 700 Hz/2470 Hz) and the decrease in the resonance resistance at 230 s (3.5 nmol = 4.9 nmol × 1770 Hz/2470 Hz), respectively.…”

Section: Molecularly Imprinted Electrodementioning

confidence: 99%

Placement of Nanospace on an Electrode for Biosensing

et al. 2012

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Electrical and electrochemical methods are well established as very useful techniques in the field of biosensing because they can easily handle signals and devices. This paper provides an overview of biosensing using a nanometer-sized space functionally. Placed effectively on the electrode, the nanospace offers several advantages, such as increased sensitivity, improved selectivity, decreased response time, and the potential for instrument miniaturization. Given the impressive technological progress of nanospace biosensors and its growing impact on analytical science, this review offers an easyto-understand presentation describing the history, recent advances, new methods, and future prospects of nanospace biosensors.

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“…EQCM has also been extensively used in studies involving interfacial phenomena on polymer modified electrodes [22] since a mass change of the polymer film can be determinated in situ during electrochemical treatment. Such examples include monitoring by real time for electropolymerization on electrode [23] and in situ adsorption/ desorption on a coated Au/quartz [24].…”

Section: Introductionmentioning

confidence: 99%

EQCM Studies of Paraquat on Gold Electrode Modified with Electropolymerized Film

1998

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This study presents a polyviologen (PV) modified gold/quartz electrode to detect paraquat (MV 2þ ) by electrochemical quartz crystal microbalance (EQCM) method. Some electroactive viologens (V 2þ ) reside in the electropolymerization achieved in pH 4.2 Britton-Robinson (BR) buffer solution containing soluble viologen oligomer. Closely examining the EQCM and cyclic voltammetry (CV) results reveal that V 2þ binds in the PV film and is electroreduced to form its relatively hydrophobic cation radical (V þ. ), which may cause the anions and hydrated water originally incorporated in the PV layer to be expelled. Moreover, while the negative potential is scanned over ¹0.55 V, the dissolved MV 2þ is reduced through V þ. to form its corresponding cation radical (MV þ.) and then becomes a dimer with the bound V þ. among the PV layer. According to our results, such dimerization possesses good reversibility so that the resonant frequency of the subsequent PV modified Au/quartz electrode can return to its initial value under the potential scanning within an appropriate region (i.e., from 0 to ¹0.7 V) and oxygen-free condition. Moreover, a linear calibration plot for detecting MV 2þ is also obtained in the range from 0 to 1.2 mM, having a detection limit of 0.1 mM.

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In-situ monitoring of microrheology on electrochemical deposition using an advanced quartz crystal analyzer and its application to polypyrrole deposition

Cited by 76 publications

References 27 publications

Quartz-crystal sensors for biosensing and chemical analysis

Quartz-crystal sensors for biosensing and chemical analysis

Placement of Nanospace on an Electrode for Biosensing

EQCM Studies of Paraquat on Gold Electrode Modified with Electropolymerized Film

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