ELECTRICAL IMPEDANCE AND ENERGY DISSIPATION ANALYSES OF QUARTZ CRYSTAL MICROBALANCE FOR POLYMER COATING

Abstract

International Journal of Computational Engineering ScienceVol. 04, No. 03, pp. 645-649 (2003) Poster PapersNo AccessELECTRICAL IMPEDANCE AND ENERGY DISSIPATION ANALYSES OF QUARTZ CRYSTAL MICROBALANCE FOR POLYMER COATINGA. L. PALANIAPPAN, J. ZHANG, XIAODI SU and FRANCIS E. H. TAYA. L. PALANIAPPANInstitute of Materials Research and Engineering, 3 Research Link Singapore 117602, SingaporeCorresponding author: Tel 65-68744509 Search for more papers by this author , J. ZHANGInstitute of Materials Research and Engineering, 3 Research Link Singapore 117602, Singapore Search for more papers by this author , XIAODI SUInstitute of Materials Research and Engineering, 3 Research Link Singapore 117602, Singapore Search for more papers by this author and FRANCIS E. H. TAYInstitute of Materials Research and Engineering, 3 Research Link Singapore 117602, Singapore Search for more papers by this author https://doi.org/10.1142/S1465876303001952Cited by:0 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractElectrical impedance analysis and energy dissipation methods are the two main methods to evaluate the damping behaviour of the quartz crystal. The motional resistance of the quartz crystal, which can reflect the quality factor (Q), is monitored in the electrical impedance analysis and the dissipation factor (D), which is inversely proportional to the Q, is measured in the energy dissipation methods. A comparison of the Q from electrical impedance analysis, termed as "electrical Q" and from the energy dissipation methods, termed as "mechanical Q" is presented in this work. The damping behavior of 5 MHz QCMs subjected to polymer caotings are studied by both methods. The resonant frequency, f, and Q before and after polymer coatings are measured using the network analyzer and a QCM-energy dissipation (QCM-D) instrument. The frequency shifts from both methods are quite comparable and the changes of the dissipation factor and the Q factor are also similar. Possible factors accounting for the Q change such as mass loading effect, evenness of the polymer coating, surface roughness of the crystal, are analyzed. The thickness range of the coating over the QCM can be used as a platform for bio sensing is also discussed.Keywords:QCMDissipation factorQuality factor References G. Sauerbrey, Z. Physik 155, 206 (1959). Crossref, Google Scholar Fredrik Hook, Michael Rodhal, Bengt Kasemo, and Peter Brezezinski, Surface changes in hemoglobin during adsorption to solid surfaces, Biophysics, Vol. 95, pp 12271-12276, October 1998 . Google ScholarJ. Zhang, X. D. Su and S. J. O`Shea, Biophysical Chemistry 99, 31 (2002). Crossref, Google ScholarMichael Rodahl, Sensors and Actuators A 54, 448 (1996). Crossref, Google ScholarFredrik Hook and Benght Kasemo, Anal. Chem 73, 5796 (2001). Crossref, Google Scholar The dissipative QCM-D technique: interfacial Phenomena and sensor applications for proteins, Biomembranes, Living Cells and Polymers. 1999 Joint Meeting EFTF-IEEE IFCS . Google ScholarC. Fredriksson, S. Khilman and B. Kasemo, Journal of Materials Science in Medicine 9, 785 (1998). Crossref, Google ScholarS. J. Martinet al., Analytical Chemistry 65, 2910 (1993). Crossref, Google ScholarCh. Zhanget al., IEEE Transactions Ultrasonics Ferroelectrics, and Frequency. Control 45(5), (1998). Google Scholar FiguresReferencesRelatedDetails Recommended Vol. 04, No. 03 Metrics History KeywordsQCMDissipation factorQuality factorPDF download