Sensors, Volume 6, Issue 4

This paper reports a first microbial biosensor for rapid and cost-effectivedetermination of organophosphorus pesticides fenitrothion and EPN. The biosensorconsisted of recombinant PNP-degrading/oxidizing bacteria Pseudomonas putida JS444anchoring and...

The “Third International Symposium on Sensor Science (I3S 2005)” was held at the Aachen University of Applied Sciences (AcUAS) from 18-21 July 2005 in Jülich, Germany.[...]

A polyaniline-based conducting composite was prepared by oxidativepolymerisation of aniline in a polyvinylchloride (PVC) matrix. The coherent free standingthin films of the composite were prepared by a solution casting method. The polyvinylchloride-p...

A multi-sensor system is a chemical sensor system which quantitatively andqualitatively records gases with a combination of cross-sensitive gas sensor arrays andpattern recognition software. This paper addresses the issue of data analysis foridentifi...

A solid-state amperometric hydrogen sensor based on a protonated Nafionmembrane and catalytic active electrode operating at room temperature was fabricated andtested. Ionic conducting polymer-metal electrode interfaces were prepared chemically byusin...

The workflow of a high throughput screening setup for the rapid identification ofnew and improved sensor materials is presented. The polyol method was applied to preparenanoparticular metal oxides as base materials, which were functionalised by surfa...

An H₂O₂ sensor for the application in industrial sterilisation processes has beendeveloped. Therefore, automated sterilisation equipment at laboratory scale has beenconstructed using parts from industrial sterilisation facilities. In addition, a soft...

We report on the synthesis and CO gas-sensing properties of mesoporoustin(IV) oxides (SnO_²). For the synthesis cetyltrimethylammonium bromide (CTABr) wasused as a structure-directing agent; the resulting SnO₂ powders were applied as films tocommercia...

Quartz crystal nanobalance (QCN) sensors are considered as powerful mass-sensitive sensors to determine materials in the sub-nanogram level. In this study, a singlepiezoelectric quartz crystal nanobalance modified with polystyrene was employed to det...

An array of 50 MHz quartz microbalances (QMBs) coated with a dendronizedpolymer was used to detect small amounts of volatile organic compounds (VOCs) in the gasphase. The results were compared to those obtained with the commonly used 10 MHzQMBs. The...

This paper discusses possible methods for on-chip fluorescent imaging forintegrated bio-sensors. The integration of optical and electro-optical accessories, accordingto suggested methods, can improve the performance of fluorescence imaging. It can bo...

GaAs-based Gunn diodes with graded AlGaAs hot electron injectorheterostructures have been developed under the special needs in automotive applications.The fabrication of the Gunn diode chips was based on total substrate removal andprocessing of integ...

In this paper, methods of surface modification of different supports, i.e. glass andpolymeric beads for enzyme immobilisation are described. The developed method ofenzyme immobilisation is based on Schiff’s base formation between the amino groups ont...

In the oil industry, huge saving may be made if suitable multi-interface levelmeasurement systems are employed for effectively monitoring crude oil separators andefficient control of their operation. A number of techniques, e.g. externally mounteddis...

Various planar technologies are employed for developing solid-state sensorshaving low cost, small size and high reproducibility; thin- and thick-film technologies aremost suitable for such productions. Screen-printing is especially suitable due to it...

A wafer-level functionality testing and characterisation system for ISFETs (ion-sensitive field-effect transistor) is realised by means of integration of a specifically designedcapillary electrochemical micro-droplet cell into a commercial wafer prob...

Micromachined thermal heater platforms offer low electrical power consumptionand high modulation speed, i.e. properties which are advantageous for realizing non-dispersive infrared (NDIR) gas- and liquid monitoring systems. In this paper, we report o...

Hydrophobic magnetic nanoparticles (NPs) consisting of undecanoate-cappedmagnetite (Fe₃O₄, average diameter ca. 5 nm) are used to control quantized electron transferto surface-confined redox units and metal NPs. A two-phase system consisting of anaqu...

In this paper, methods of sample preparation for potentiometric measurement ofphenylalanine are presented. Basing on the spectrophotometric measurements ofphenylalanine, the concentrations of reagents of the enzymatic reaction (10 mM L-Phe,0,4 mM NAD...

A first step towards the fabrication and electrochemical evaluation of thin-filmmicrosensors based on organic PVC membranes for the determination of Hg(II), Cd(II),Pb(II) and Cu(II) ions in solutions has been realised. The membrane-coating mixture us...

The applicability of differential pulse voltammetry (DPV) and adsorptivestripping voltammetry (AdSV) at a non-toxic meniscus-modified silver solid amalgamelectrode (m-AgSAE) for the determination of trace amounts of genotoxic substances wasdemonstrat...

This paper presents a two-dimensional-in-space mathematical model ofbiosensors based on an array of enzyme microreactors immobilised on a single electrode.The modeling system acts under amperometric conditions. The microreactors were modeledby partic...

A new and simple method for nanostructuring using conventionalphotolithography and layer expansion or pattern-size reduction technique is presented, whichcan further be applied for the fabrication of different nanostructures and nano-devices. Themeth...