From Science direct: One of the nanowires was covered with a 2-Hydroxyethyl methacrylate based compound to prevent hydrogen from reaching the wire. The compound was dried by a UV source and tested in chamber for comparison with previous measurements. The results shows that temperature effects can be reduced by a digital signal processing algorithm without measuring temperature near or at the substrate. With this method no additional temperature probes are necessary making this solution a candidate for ultra low power wireless applications.
MULTIFILE
from the article: The demand for a wireless CO2 solution is ever increasing. One of the biggest problems with the majority of commercial available CO2 sensors is the high energy consumption which makes them unsuitable for battery operation. Possible candidates for CO2 sensing in a low power wireless application are very limited and show a problematic calibration process. This study focuses on one of those EMF candidates, which is a Ag4RbI5 based sensor. This EMF sensor is based on the potentiometric principle and consumes no energy. The EMF cell was studied in a chamber where humidity, temperature and CO2 level could be controlled. This study gives an detailed insight in the different drift properties of the potentiometric CO2 sensor and a method to amplify the sensors signal. Furthermore, a method to minimize the several types of drift is given. With this method the temperature drift can be decreased by a factor 10, making the sensor a possible candidate for a wireless CO2 sensor network.
DOCUMENT
From Springer description: "We present the design considerations of an autonomous wireless sensor and discuss the fabrication and testing of the various components including the energy harvester, the active sensing devices and the power management and sensor interface circuits. A common materials platform, namely, nanowires, enables us to fabricate state-of-the-art components at reduced volume and show chemical sensing within the available energy budget. We demonstrate a photovoltaic mini-module made of silicon nanowire solar cells, each of 0.5 mm2 area, which delivers a power of 260 μW and an open circuit voltage of 2 V at one sun illumination. Using nanowire platforms two sensing applications are presented. Combining functionalised suspended Si nanowires with a novel microfluidic fluid delivery system, fully integrated microfluidic–sensor devices are examined as sensors for streptavidin and pH, whereas, using a microchip modified with Pd nanowires provides a power efficient and fast early hydrogen gas detection method. Finally, an ultra-low power, efficient solar energy harvesting and sensing microsystem augmented with a 6 mAh rechargeable battery allows for less than 20 μW power consumption and 425 h sensor operation even without energy harvesting."
LINK
Zuyd University of Applied Sciences (ZUYD) and partners will develop photoflow chemistry reaction set-ups that will be powered with light as sustainable energy source, and as such contribute to the transition of the current chemical industry to a climate neutral one. To develop these reaction set-ups, a consortium of partners from the Dutch, Belgian and German chemical and high-tech ecosystems will cover all aspects related to required hardware, e.g. transparent reactors and energy-efficient light sources, automation and multiphase reactions. The mix of partners from academia (University of Amsterdam: the Noël group), an applied research organization (TNO), Center of Expertise CHILL, ZUYD, the Brightlands Chemelot Campus and multiple companies (Beartree Automation, Chemtrix, Creaflow, Ecosynth, De Heer, Innosyn, Mettler-Toledo, Peschl Ultraviolet and Swagelok Nederland) ensures an efficient and integrated development along technology readiness levels (TRL) ranging from two/three to five/six. Together we will answer the overarching question: With which advanced reaction set-up(s) can we efficiently perform and further optimize multiphase solution-based photochemical reactions that require gas and/or solid reagents, and efficiently showcase our capabilities? The development of the advanced reaction set-ups will allow us to answer our research question: How far can we extend the applicability of photoflow transformations beyond the current commercial state-of-the-art by the use of advanced reaction set-ups? Dissemination of several demonstrator transformations using our advanced set-ups will showcase capabilities of Light-Up partners and speed up the uptake of photoflow chemistry in industry. We will develop the next generation of advanced reaction set-ups for photoflow chemistry by combining the knowledge of the chemical and high-tech sectors, and facilitating knowledge exchange between sectors, to contribute to a climate neutral industry.
