From the article: "A facile approach for the fabrication of large-scale interdigitated nanogap electrodes (nanogap IDEs) with a controllable gap was demonstrated with conventional micro-fabrication technology to develop chemocapacitors for gas sensing applications. In this work, interdigitated nanogap electrodes (nanogap IDEs) with gaps from 50–250 nm have been designed and processed at full wafer-scale. These nanogap IDEs were then coated with poly(4-vinyl phenol) as a sensitive layer to form gas sensors for acetone detection at low concentrations. These acetone sensors showed excellent sensing performance with a dynamic range from 1000 ppm to 10 ppm of acetone at room temperature and the observed results are compared with conventional interdigitated microelectrodes according to our previous work. Sensitivity and reproducibility of devices are discussed in detail. Our approach of fabrication of nanogap IDEs together with a simple coating method to apply the sensing layer opens up possibilities to create various nanogap devices in a cost-effective manner for gas sensing applications"
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Although there is consensus in the current literature that feedback plays a fundamental role tostudent performance and learning, there is debate about what makes it effective. Particularly,some assessment instruments, like the National Student Survey in the United Kingdom, revealthat evaluation and feedback are systematically among the areas that students are less satisfiedwith. The aim of this article is to describe the indirect feedback technique, which was devised andused by the principle author in his previous tenure as a professor at the University of Cadiz inSpain and to reflect on how it can be applied to overcome some of the limitations presented in adifferent context of practice. It is argued that indirect feedback meets many of the principles ofgood practice (facilitation of self-assessment skills, delivery of quality information about thestudents’ learning, encouragement of dialogue, and improvement of teaching) identified by Nicoland McFarlane-Dick (2006).
Micro Ring Resonators (MRRs) have become the workhorse in photonics, both for data/telecomas well as bio-chemical sensing applications. In this contribution the use of MRRs as sensors for food-safety applications will be discussed.
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