http://www.mdpi.com/journal/sensors/special_issues/piezoelectric_sensor/ Submission Sensors (http://www.mdpi.org/sensors/) is a highly rated journal with a 1.573 impact factor in 2007. Sensors is indexed and abstracted very quickly by Chemical Abstracts, Analytical Abstracts, Science Citation Index Expanded, Chemistry Citation Index, Scopus and Google Scholar. All papers should be submitted to sensors@mdpi.org with copy to the guest editors. To be published continuously until the deadline and papers will be listed together at the special websites. Please visit the instructions for authors at http://www.mdpi.org/sensors/publguid.htm before submitting a paper. Open Access publication fees are 1050 CHF per paper. English correction fees (250 CHF) will be added in certain cases (1300 CHF per paper for those papers that require extensive additional formatting and/or English corrections.). http://www.mdpi.com/1424-8220/9/3/1394/ This paper adopts Taguchi’s signal-to-noise ratio analysis to optimize the dynamic characteristics of a SAW gas sensor system whose output response is linearly related to the input signal. The goal of the present dynamic characteristics study is to increase the sensitivity of the measurement system while simultaneously reducing its variability. A time- and cost-efficient finite element analysis method is utilized to investigate the effects of the deposited mass upon the resonant frequency output of the SAW biosensor. The results show that the proposed methodology not only reduces the design cost but also promotes the performance of the sensors. http://www.mdpi.com/1424-8220/9/3/1394/ Fri, 27 Feb 2009 00:00:00 CET Sensors 2009-02-27 9 3 Article 1394 1408 1424-8220 Robust Design of SAW Gas Sensors by Taguchi Dynamic Method 2009-02-27 doi: 10.3390/s90301394 Hsun-Heng Tsai Der Ho Wu Ting-Lung Chiang Hsin Hua Chen http://www.mdpi.com/1424-8220/8/1/370/ From the first applications of AT-cut quartz crystals as sensors in solutionsmore than 20 years ago, the so-called quartz crystal microbalance (QCM) sensor isbecoming into a good alternative analytical method in a great deal of applications such asbiosensors, analysis of biomolecular interactions, study of bacterial adhesion at specificinterfaces, pathogen and microorganism detection, study of polymer film-biomolecule orcell-substrate interactions, immunosensors and an extensive use in fluids and polymercharacterization and electrochemical applications among others. The appropriateevaluation of this analytical method requires recognizing the different steps involved andto be conscious of their importance and limitations. The first step involved in a QCMsystem is the accurate and appropriate characterization of the sensor in relation to thespecific application. The use of the piezoelectric sensor in contact with solutions stronglyaffects its behavior and appropriate electronic interfaces must be used for an adequatesensor characterization. Systems based on different principles and techniques have beenimplemented during the last 25 years. The interface selection for the specific application isimportant and its limitations must be known to be conscious of its suitability, and foravoiding the possible error propagation in the interpretation of results. This article presentsa comprehensive overview of the different techniques used for AT-cut quartz crystalmicrobalance in in-solution applications, which are based on the following principles:network or impedance analyzers, decay methods, oscillators and lock-in techniques. Theelectronic interfaces based on oscillators and phase-locked techniques are treated in detail,with the description of different configurations, since these techniques are the most used inapplications for detection of analytes in solutions, and in those where a fast sensorresponse is necessary. http://www.mdpi.com/1424-8220/8/1/370/ Mon, 21 Jan 2008 00:00:00 CET Sensors 2008-01-21 8 1 Review 370 411 1424-8220 A Review of Interface Electronic Systems for AT-cut Quartz Crystal Microbalance Applications in Liquids 2008-01-21 doi: 10.3390/s8010370 Antonio Arnau