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Hiroshi Muramatsu - One of the best experts on this subject based on the ideXlab platform.

  • Basic characteristics of Quartz Crystal sensor with interdigitated electrodes
    Analytical Chemistry Research, 2016
    Co-Authors: Hiroshi Muramatsu, Maki Kawamura, Sachiko Tanabe, Masayuki Suda
    Abstract:

    Abstract This paper describes basic characteristics of the Quartz Crystal sensor with interdigitated electrodes (IDE Quartz Crystal sensor) which is for simultaneous monitoring of mass, viscosity, conductivity and dielectric changes of liquids or thin films. As the IDE Quartz Crystal sensor has three terminals for a pair of IDEs on the one side and a counter electrode on the other side, the resonance properties have been analyzed using the electrical equivalent circuit models and measured experimentally for all connecting types of electrode pairs. The IDE Quartz Crystal has shown clear resonance curves for calculating the resonance frequency and resonance resistance values as well as normal Quartz Crystal in the air and in contact with liquid. Small shifts in the resonance frequency and resonance resistance depending on the connecting types have been obtained and analyzed using the equivalent circuit models. We have found the integrated Quartz Crystal and IDE sensors could be monitored simultaneously by only one impedance analyzer. Finally, two types of measuring systems have been demonstrated for continuous measuring methods.

  • Increase the reliability and applicability of Quartz Crystal resonator coupled with other instruments.
    Journal of nanoscience and nanotechnology, 2013
    Co-Authors: Jong-min Kim, Hiroshi Muramatsu, Seong-mo Kang, Hyen-wook Kang, Woo-sik Kim, Sang-mok Chang
    Abstract:

    The principle and applications of Quartz-Crystal resonator systems and the methods to increase their reliability and applicability coupled with other instruments were reported. The principle of Quartz-Crystal resonator system was documented with based on the three basic concepts for mass, viscosity, and viscoelastic changes. In the preliminary discussion, the realization of a resonant frequency-resonant resistance diagram was described in detail. As the examples of Quartz-Crystal resonator applications with introducing the resonant resistance concept and the resonant frequency, the fabrication of a carbon-coated Quartz Crystal sensor and monitoring changes in the viscoelastic properties of thin polymer films were carefully discussed. Examples for increasing their reliability and applicability of Quartz Crystal resonator systems combined with UV-visible spectroscopy, Atomic Force Microscope (AFM), Surface Plasmon Resonance (SPR), or Charge Coupled Device (CdCD) camera were described.

  • Quartz-Crystal sensors for biosensing and chemical analysis.
    Analytical and bioanalytical chemistry, 2002
    Co-Authors: Hiroshi Muramatsu, Jong-min Kim, Sang-mok Chang
    Abstract:

    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.

  • Characterization of aluminum corrosion with a Quartz Crystal analyzer
    Analytica Chimica Acta, 1999
    Co-Authors: Kwang J Choi, Sang M Chang, Akira Egawa, Hiroshi Muramatsu
    Abstract:

    Abstract A Quartz Crystal analyzer is utilized to monitor the corrosion process of an aluminum surface. A Quartz Crystal having 2000 A of aluminum layer is installed in a specially designed cell and is in contact with an electrolyte solution. While a constant potential is applied to the cell, the resonance frequency and resonance resistance are simultaneously measured using the analyzer. In addition, surface topographs are taken with an atomic force microscope and the element analysis of the surface is conducted using an energy dispersive X-ray spectrometer. We believe that the resonance frequency and the resonance resistance during the corrosion process can be explained by the change of surface structure caused by the corrosion. The amount of surface metal dissolution affects the variation of the resonance frequency and the resonance resistance due to the mass changes of surface metal and entrapped liquid and surface roughness. These are supported by the surface topograph and element analysis, and it is found that a simple measurement using the Quartz Crystal analyzer can replace the complex monitoring employing large equipments in the investigation of a corrosion process of metal surface.

  • Scanning localized viscoelastic image using a Quartz Crystal resonator combined with an atomic force microscopy
    Applied Physics Letters, 1999
    Co-Authors: Jong-min Kim, Sang-mok Chang, Hiroshi Muramatsu
    Abstract:

    A Quartz Crystal resonator and an atomic force microscopy were applied for the measurement of local viscoelasticity and surface morphology. For the reduction of signal noise from the Quartz Crystal resonator, we designed an oscillation circuit based on a referential Quartz Crystal method. A polystyrene bead-coated Quartz Crystal was used as a signal Quartz Crystal, and a bare Au Quartz Crystal was used as a reference. By approaching the cantilever of atomic force microscopy to the surface of working Quartz Crystal, the differential resonant frequency in the two Quartz Crystals showed changes by the interaction between the tip and the Quartz Crystal. The changes of differential resonant frequency in the two Quartz Crystals were influenced by the local viscoelasticity. The image resolution of differential resonant frequency was observed under 80 nm for the polystyrene bead-coated Quartz Crystal.

Jeffrey J. Rosentreter - One of the best experts on this subject based on the ideXlab platform.

  • Piezoelectric Quartz Crystal biosensors
    Talanta, 1998
    Co-Authors: Renee L. Bunde, Eric J Jarvi, Jeffrey J. Rosentreter
    Abstract:

    Biosensing methods utilize the intrinsic selectivity of a biorecognition process to create relatively simple, low cost, analytical alternatives for a variety of research investigations. Here, biosensor applications of the piezoelectric Quartz Crystal (PQC) are reviewed. The discussion is divided into sections focusing on the development of PQC based analytical techniques, applications in solution phase sensing pertaining to PQC biosensors, and the current state of knowledge in PQC biosensing applications. Immobilization procedures, dip and dry assay techniques, and solution phase sensing methods are considered in detail.

Jong-min Kim - One of the best experts on this subject based on the ideXlab platform.

  • Increase the reliability and applicability of Quartz Crystal resonator coupled with other instruments.
    Journal of nanoscience and nanotechnology, 2013
    Co-Authors: Jong-min Kim, Hiroshi Muramatsu, Seong-mo Kang, Hyen-wook Kang, Woo-sik Kim, Sang-mok Chang
    Abstract:

    The principle and applications of Quartz-Crystal resonator systems and the methods to increase their reliability and applicability coupled with other instruments were reported. The principle of Quartz-Crystal resonator system was documented with based on the three basic concepts for mass, viscosity, and viscoelastic changes. In the preliminary discussion, the realization of a resonant frequency-resonant resistance diagram was described in detail. As the examples of Quartz-Crystal resonator applications with introducing the resonant resistance concept and the resonant frequency, the fabrication of a carbon-coated Quartz Crystal sensor and monitoring changes in the viscoelastic properties of thin polymer films were carefully discussed. Examples for increasing their reliability and applicability of Quartz Crystal resonator systems combined with UV-visible spectroscopy, Atomic Force Microscope (AFM), Surface Plasmon Resonance (SPR), or Charge Coupled Device (CdCD) camera were described.

  • Principle of Sensor Systems by using a Quartz Crystal and Their Applications
    Korean Journal of Chemical Engineering, 2009
    Co-Authors: Jong-min Kim, Sang-mok Chang, Woo-sik Kim
    Abstract:

    The principle and applications of Quartz Crystal sensors based on the three basic concepts for mass, viscosity, and viscoelastic changes are reviewed. In the general discussion the basic principle of Quartz Crystal and realization of a resonant frequency–resonant resistance diagram are described in detail. As examples of their applications, gas sensing with a carbon-coated Quartz Crystal, determination of the blood coagulation factor, an electrochemical analysis and Crystallization analysis are reported. The possibility of developing new biosensors and chemical sensors is discussed on the basis of these results.

  • Quartz-Crystal sensors for biosensing and chemical analysis.
    Analytical and bioanalytical chemistry, 2002
    Co-Authors: Hiroshi Muramatsu, Jong-min Kim, Sang-mok Chang
    Abstract:

    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.

  • Scanning localized viscoelastic image using a Quartz Crystal resonator combined with an atomic force microscopy
    Applied Physics Letters, 1999
    Co-Authors: Jong-min Kim, Sang-mok Chang, Hiroshi Muramatsu
    Abstract:

    A Quartz Crystal resonator and an atomic force microscopy were applied for the measurement of local viscoelasticity and surface morphology. For the reduction of signal noise from the Quartz Crystal resonator, we designed an oscillation circuit based on a referential Quartz Crystal method. A polystyrene bead-coated Quartz Crystal was used as a signal Quartz Crystal, and a bare Au Quartz Crystal was used as a reference. By approaching the cantilever of atomic force microscopy to the surface of working Quartz Crystal, the differential resonant frequency in the two Quartz Crystals showed changes by the interaction between the tip and the Quartz Crystal. The changes of differential resonant frequency in the two Quartz Crystals were influenced by the local viscoelasticity. The image resolution of differential resonant frequency was observed under 80 nm for the polystyrene bead-coated Quartz Crystal.

  • Stability study of carbon graphite covered Quartz Crystal
    Sensors and Actuators A: Physical, 1999
    Co-Authors: Jong-min Kim, Sang-mok Chang, Yoshihisa Suda, Hiroshi Muramatsu
    Abstract:

    This paper shows the properties and the possibilities of carbon graphite-covered Quartz Crystal as an organic gas-sensing device. The carbon graphite formed on a side of Quartz plate was supported by Pt electrodes. The prepared Quartz Crystals were heat treated for the enhancement of stability in the temperature range from 100 to 450°C. Impedance analysis of the carbon graphite-covered Quartz Crystal showed a larger admittance value than that of a lipid coated Quartz Crystal, which was based on our previous method for detecting gas components. Using the adsorption and desorption responses, the reproducibility and sensitivity are presented for describing the merits of carbon graphite-covered Quartz Crystal in the detection of organic gas components. The comparison of sensitivity between commercially available alcohol sensor and carbon graphite-covered Quartz Crystal is provided for a ppm of ethanol injection. These results prove that the carbon graphite-covered Quartz Crystals are usable as an organic gas sensor and as an analytical device.

Tetsu Tatsuma - One of the best experts on this subject based on the ideXlab platform.

  • Multichannel Quartz Crystal Microbalance
    Analytical chemistry, 1999
    Co-Authors: Tetsu Tatsuma, Noboru Oyama, Yoshihito Watanabe, Kaoru Kitakizaki, Masanori Haba
    Abstract:

    Arrays of Quartz Crystal resonators are fabricated on a single Quartz wafer as a multichannel Quartz Crystal microbalance (MQCM). Three types of four-channel array of 10-MHz resonators are prepared and tested. Mechanical oscillation of each channel is entrapped within the channel almost completely, so that the interference between the channels via the Quartz Crystal plate is almost negligible. A mass change on each channel is quantitatively evaluated on the basis of Sauerbrey's law. Thus, each channel of a MQCM device can be used as an independent QCM. Influence from a longitudinal wave generated from another channel is also negligible compared to the influence from the wave from the monitored channel itself. The simultaneous oscillation of channels is also possible. The potential applicability of MQCM to the two-dimensional mapping of mass changes is demonstrated.

  • Scanning Electrode Quartz Crystal Analysis
    Analytical Chemistry, 1997
    Co-Authors: Noboru Oyama, Tetsu Tatsuma, Shuichiro Yamaguchi, Masanori Tsukahara
    Abstract:

    Principles and methods for scanning electrode Quartz Crystal analysis (SEQCA) as a technique for mapping distribution of mass and measuring interfacial rheology are described. In SEQCA, Quartz Crystal resonates in a region between a normal electrode and a microelectrode scanned over the opposite side of the normal electrode. The surface of the Quartz Crystal plate just below the scanning electrode is monitored (overscanning mode). A prototype system for the scanning electrode Quartz Crystal analysis is constructed. The dependence of the resonance properties on the location of the scanning electrode is studied. As a result, it was found that the qualitative mapping of the mass distribution is possible in the lateral resolution of 1 (9 MHz Quartz) to 2 (5 MHz) mm. Viscoelastic properties of the load on the Quartz surface are also measured qualitatively.

Sang-mok Chang - One of the best experts on this subject based on the ideXlab platform.

  • Increase the reliability and applicability of Quartz Crystal resonator coupled with other instruments.
    Journal of nanoscience and nanotechnology, 2013
    Co-Authors: Jong-min Kim, Hiroshi Muramatsu, Seong-mo Kang, Hyen-wook Kang, Woo-sik Kim, Sang-mok Chang
    Abstract:

    The principle and applications of Quartz-Crystal resonator systems and the methods to increase their reliability and applicability coupled with other instruments were reported. The principle of Quartz-Crystal resonator system was documented with based on the three basic concepts for mass, viscosity, and viscoelastic changes. In the preliminary discussion, the realization of a resonant frequency-resonant resistance diagram was described in detail. As the examples of Quartz-Crystal resonator applications with introducing the resonant resistance concept and the resonant frequency, the fabrication of a carbon-coated Quartz Crystal sensor and monitoring changes in the viscoelastic properties of thin polymer films were carefully discussed. Examples for increasing their reliability and applicability of Quartz Crystal resonator systems combined with UV-visible spectroscopy, Atomic Force Microscope (AFM), Surface Plasmon Resonance (SPR), or Charge Coupled Device (CdCD) camera were described.

  • Principle of Sensor Systems by using a Quartz Crystal and Their Applications
    Korean Journal of Chemical Engineering, 2009
    Co-Authors: Jong-min Kim, Sang-mok Chang, Woo-sik Kim
    Abstract:

    The principle and applications of Quartz Crystal sensors based on the three basic concepts for mass, viscosity, and viscoelastic changes are reviewed. In the general discussion the basic principle of Quartz Crystal and realization of a resonant frequency–resonant resistance diagram are described in detail. As examples of their applications, gas sensing with a carbon-coated Quartz Crystal, determination of the blood coagulation factor, an electrochemical analysis and Crystallization analysis are reported. The possibility of developing new biosensors and chemical sensors is discussed on the basis of these results.

  • Quartz-Crystal sensors for biosensing and chemical analysis.
    Analytical and bioanalytical chemistry, 2002
    Co-Authors: Hiroshi Muramatsu, Jong-min Kim, Sang-mok Chang
    Abstract:

    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.

  • Scanning localized viscoelastic image using a Quartz Crystal resonator combined with an atomic force microscopy
    Applied Physics Letters, 1999
    Co-Authors: Jong-min Kim, Sang-mok Chang, Hiroshi Muramatsu
    Abstract:

    A Quartz Crystal resonator and an atomic force microscopy were applied for the measurement of local viscoelasticity and surface morphology. For the reduction of signal noise from the Quartz Crystal resonator, we designed an oscillation circuit based on a referential Quartz Crystal method. A polystyrene bead-coated Quartz Crystal was used as a signal Quartz Crystal, and a bare Au Quartz Crystal was used as a reference. By approaching the cantilever of atomic force microscopy to the surface of working Quartz Crystal, the differential resonant frequency in the two Quartz Crystals showed changes by the interaction between the tip and the Quartz Crystal. The changes of differential resonant frequency in the two Quartz Crystals were influenced by the local viscoelasticity. The image resolution of differential resonant frequency was observed under 80 nm for the polystyrene bead-coated Quartz Crystal.

  • Stability study of carbon graphite covered Quartz Crystal
    Sensors and Actuators A: Physical, 1999
    Co-Authors: Jong-min Kim, Sang-mok Chang, Yoshihisa Suda, Hiroshi Muramatsu
    Abstract:

    This paper shows the properties and the possibilities of carbon graphite-covered Quartz Crystal as an organic gas-sensing device. The carbon graphite formed on a side of Quartz plate was supported by Pt electrodes. The prepared Quartz Crystals were heat treated for the enhancement of stability in the temperature range from 100 to 450°C. Impedance analysis of the carbon graphite-covered Quartz Crystal showed a larger admittance value than that of a lipid coated Quartz Crystal, which was based on our previous method for detecting gas components. Using the adsorption and desorption responses, the reproducibility and sensitivity are presented for describing the merits of carbon graphite-covered Quartz Crystal in the detection of organic gas components. The comparison of sensitivity between commercially available alcohol sensor and carbon graphite-covered Quartz Crystal is provided for a ppm of ethanol injection. These results prove that the carbon graphite-covered Quartz Crystals are usable as an organic gas sensor and as an analytical device.