Showing papers in "Procedia Chemistry in 2009"

TL;DR: In this article, the effect of polyvinyl pyrrolidone (PVP) and polyvinylon alcohol (PVA) on the stabilization of obtained silver colloids was investigated.

TL;DR: In this paper, a nonlinear beam converter with white-noise vibration was proposed to improve energy harvesting from wide-spectrum vibrations in a cantilever beam with added nonlinearity, which was simulated by using a MATLAB® Stochastic Differential Equation (SDE) Toolbox with a white noise vibration.

TL;DR: In this article, a micro power generator harvesting vibration energy by resonant inertial oscillation of a piezoelectric laminated cantilever with proof mass was designed, fabricated, and characterized.

TL;DR: A multilateration algorithm is presented in this work in order to realize a precise localization of the sensor nodes in wireless sensor networks in logistic applications.

TL;DR: A method to couple GPS and a high resolution MEMS pressure sensor is presented to improve vertical as well as horizontal positioning and a step counter based on an accelerometer is improved with an altimeter for stair detection and automatic step length adaptation for dead reckoning inside buildings.

TL;DR: In this paper, a bi-stable mechanical structure is used to initiate high-frequency mechanical oscillations in an electromagnetic scavenger for scavenging low-frequency non-periodic vibrations.

TL;DR: In this article, an elastomeric force sensitive resistor (FSR) made from a porous matrix of polydimethylsiloxane (PDMS) filled with carbon black is presented.

TL;DR: In this paper, a new generation of passive gas sensors that works at millimeter-wave frequency (50 to 70 GHz) incorporating sensitive material is presented, which uses a microwave planar dielectric resonator operating with whispering gallery-modes.

TL;DR: In this article, the best photoactivity under visible light was observed for B-TiO2 modified with 2 wt% of boron prepared by grinding ST-01 with dopant followed by calcinations at 400°C.

TL;DR: An amperometric dipyrone sensor based on a polymeric nickel-salen (salen = N,N´-ethylenebis(salicydeneiminato)) film coated platinum electrode was developed as mentioned in this paper.

TL;DR: The CEA-LETI magnetometer as discussed by the authors was designed and realized for the SWARM satellite integration in 2010, and it was able to provide vector field measurements with an intrinsic 1 nT/√Hz resolution and a 0.4 Hz bandwidth.

TL;DR: In this article, the authors present a wearable, wearable, robust, flexible and disposable microfluidic device which incorporates micro-Light Emitting Diodes (μ-LEDs) as a detection system, for monitoring in real time mode the pH of the sweat generated during an exercise period.

TL;DR: In this paper, porous gas sensing films composed of TiO2 nanotubes were fabricated by a hydrothermal treatment for the detection of organic gases, such as alcohol and toluene.

TL;DR: In this article, a MEMS Resonant Pressure Transducers (RPT) is produced using a flexible fabrication route to allow pressure ranges from 1bar to 700bar in fully oil isolated hermetic packages without compromising sensor performance.

TL;DR: In this article, a low-temperature technique (< 100 °C) is introduced to irreversibly bond two or more structured layers of SU-8 and PDMS to create hybrid stacks.

TL;DR: In this paper, material development for sputtered thin carbon films with a high gauge factor and negligible temperature coefficient of resistivity (TCR) was conducted for self compensated sensor materials.

TL;DR: In this article, a complete portable laser-based projection system using two one-dimensional magnetic actuated MEMS linear scanning micro-mirrors is presented, which is able to project static images and videos with projection size of 50 cm diagonal at 50 cm distance with 32x32 px resolution.

TL;DR: A system was designed on flexible substrates to measure two of the most important physiological parameters in human life: breathing rhythm and ECG, and a promising feature is the adoption of accelerometers to quantify the breathing cycle.

TL;DR: In this article, a circuit architecture is proposed to enable an improved system startup for vibration-based piezoelectric microgenerators, which is based on an optimized synchronous rectifier design and a new trigger circuit.

TL;DR: In this article, the feasibility of biosensing for a novel two-dimensional photonic crystal (PC) based nano-ring resonator by computational study was investigated and the sensitivity of various holes has been studied.

TL;DR: In this paper, an electronic tongue with 36 cross-sensibility polymeric membranes was built and used for semi-quantitative analysis of beverages and the data obtained were treated by stepwise linear discriminant analysis, allowing a 100% overall correct classification for the original grouped cases and a 93.8% for the leaving one-out cross-validation procedure.

TL;DR: In this paper, a new kind of electrostatically tunable surface micromachined Fabry-Perot interferometer (FPI) structure and a process flow which was successfully used to fabricate devices for visible wavelength range.

TL;DR: In this article, a distributed fiber optic monitoring system for detection of strain and temperature along single-mode fibres is presented based on the Brillouin optical-fibre frequency-domain analysis (BOFDA).

TL;DR: In this paper, an electromagnetic power generator with 46 Hz resonance frequency was designed to scavenge mechanical vibrations occurring in tyres due to tyre-road contact, the major innovation is the use of FR4 as a structural spring material as well as utilizing a spacer and stopper mechanism increasing the shock resistance by limiting the maximum deflection.

TL;DR: In this article, a wireless sensor system based on surface acoustic wave (SAW) technology has been developed to measure the temperature inside a refractory lining of a metallurgical vessel.

TL;DR: In this article, polyclonal anti-E.coli antibodies are immobilized onto gold electrodes following two different strategies, via chemical bond formation between antibody amino groups and a carboxylic acid containing self-assembled molecular monolayer (SAM).

TL;DR: A new concept of innovative active endoscopic device, being 11 mm in diameter and 31 mm in length, with a force controlled stopping mechanism for esophageal inspection, with the aim of enabling an effective inspections of the esophagus.

TL;DR: In this article, the authors studied the development of a selective potassium ion sensor constituted of a carbon paste electrode modified (CPEM) with a novel KSr2Nb2O15.

TL;DR: In this article, the authors review recent progress and future prospects of printed skin-like large-area flexible sensors and actuators and address the issues and future prospect of flexible devices such as printed plastic MEMS devices and organic transistors from the view point of ambient electronics.

TL;DR: In this article, a top-down fabrication process in SOI wafers yielding SiNWFETs is described and compared with the combined effects of the two gates on the transport characteristics in electrolytes and show that both gates are essential to perform well-defined sensing experiments.