A simple nose for noxious gases 1 min read · Thu, May 4 2017 News material science and engineering metal-organic framework chemical science Tunable porous MOF materials interface with electrodes to sound the alarm at the first sniff of hydrogen sulfide.
Self-Biased Differential Rectifier with Enhanced Dynamic Range for Wireless Powering 1 min read · Wed, Apr 26 2017 News Circuits wireless powering Mahmoud H. Ouda, et al., "Self-biased differential rectifier with enhanced dynamic range for wireless powering." IEEE Transactions on Circuits and Systems II: Express Briefs 64, (5), 2017, 515. A self-biased cross-coupled differential rectifier is proposed with enhanced power-conversion efficiency (PCE) over an extended range of input power. A prototype is designed for ultrahigh-frequency (UHF) 433-MHz radio-frequency power-harvesting applications and is implemented using a 0.18-μm CMOS technology. The proposed rectifier architecture is compared with the conventional cross-coupled rectifier
A 33fJ/Step SAR capacitance-to-digital converter using a chain of inverter-based amplifiers 1 min read · Wed, Apr 26 2017 News Circuits inverter-based amplifiers Hesham Omran, et al., "A 33fJ/Step SAR capacitance-to-digital converter using a chain of inverter-based amplifiers". IEEE Transactions on Circuits and Systems I: Regular Papers, 64(2), 2017, 310. Abstract: A 12 - bit energy-efficient capacitive sensor interface circuit that fully relies on capacitance-domain successive approximation (SAR) technique is presented. Analysis shows that for SAR capacitance-to-digital converter (CDC) comparator offset voltage will result in parasitic-dependent conversion errors, which necessitates using an offset cancellation technique. Based on the presented
Experimental demonstration of fractional-order oscillators of orders 2.6 and 2.7 1 min read · Wed, Apr 26 2017 News sinusoidal oscillations Circuits fractional order Ahmed S. Elwakil, et al., "Experimental demonstration of fractional-order oscillators of orders 2.6 and 2.7". Chaos, Solitons & Fractals, 96, 2017, 160. The purpose of this work is to provide an experimental demonstration for the development of sinusoidal oscillations in a fractional-order Hartley-like oscillator. Solid-state fractional-order electric double-layer capacitors were first fabricated using graphene-percolated P (VDF-TrFE-CFE) composite structure, and then characterized by using electrochemical impedance spectroscopy. The devices exhibit the fractional orders of 0.6 and 0.74
Experimental behavior evaluation of series and parallel connected constant phase elements 1 min read · Wed, Apr 26 2017 News otas Circuits CMOS Georgia Tsirimokou, et al., "Experimental behavior evaluation of series and parallel connected constant phase elements". AEU-International Journal of Electronics and Communications, 74, 2017, 5. Fractional-order capacitors are the core building blocks for implementing fractional-order circuits. Due to the absence of their commercial availability, they can be approximated through appropriately configured passive or active integer-order element topologies. Such a topology, constructed using Operational Transconductance Amplifiers (OTAs) and capacitors has been implemented in monolithic form
Localized surface plate modes via flexural Mie resonances 1 min read · Wed, Apr 26 2017 News Circuits Surface-plasmon polaritons excitation of metals highfrequency electromagnetic waves Mohamed Farhat, et al., "Localized surface plate modes via flexural Mie resonances". Physical Review B, 95(17), 2017, 174201. Surface-plasmon polaritons are naturally generated upon excitation of metals with high-frequency electromagnetic waves. However, the concept of spoof plasmons has made it possible to generate plasmoniclike effects in microwave electrodynamics, magnetics, and even acoustics. Similarly, in this paper, the concept of localized surface plate modes (SPMs) is introduced. It is demonstrated that SPMs can be generated on a two-dimensional (clamped or stress-free) cylindrical
Transparent Flash Memory Using Single Ta2O5 Layer for Both Charge-Trapping and Tunneling Dielectrics 1 min read · Wed, Apr 26 2017 News Circuits Ta2O5 Mrinal K. Hota, et al., "Transparent Flash Memory Using Single Ta2O5 Layer for Both Charge-Trapping and Tunneling Dielectrics." A CS applied materials & interfaces 9 (26), 2017, 21856. We report reproducible multibit transparent flash memory in which a single solution-derived Ta2O5 layer is used simultaneously as a charge-trapping layer and a tunneling layer. This is different from conventional flash memory cells where two different dielectric layers are typically used. Under optimized programming/erasing operations, the memory device shows excellent programmable memory characteristics with a
3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring 1 min read · Wed, Apr 26 2017 News Circuits Integrated Microelectronics muhamad F. Farooqui, et al., "3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring". Advanced Materials Technologies, 2(8), 2017, 1700051. Large area environmental monitoring can play a crucial role in dealing with crisis situations. However, it is challenging as implementing a fixed sensor network infrastructure over large remote area is economically unfeasible. This work proposes disposable, compact, dispersible 3D‐printed wireless sensor nodes with integrated microelectronics which can be dispersed in the environment and work in
A biosensor-CMOS platform and integrated readout circuit in 0.18-μm CMOS technology for cancer biomarker detection 1 min read · Wed, Apr 26 2017 News Biosensors ssat CMOS Abdulaziz Alhoshany, et al., " A biosensor-CMOS platform and integrated readout circuit in 0.18-μm CMOS technology for cancer biomarker detection". Sensors, 17(9), 2017, 1942. This paper presents a biosensor-CMOS platform for measuring the capacitive coupling of biorecognition elements. The biosensor is designed, fabricated, and tested for the detection and quantification of a protein that reveals the presence of early-stage cancer. For the first time, the spermidine/spermine N1 acetyltransferase (SSAT) enzyme has been screened and quantified on the surface of a capacitive sensor. The sensor
Tunable fractional-order capacitor using layered ferroelectric polymers 1 min read · Wed, Apr 26 2017 News focs Circuits Agamyrat Agambayev, et al. "Tunable fractional-order capacitor using layered ferroelectric polymers." AIP Advances 7 (9), 2017, 095202. Pairs of various Polyvinylidene fluoride P(VDF)-based polymers are used for fabricating bilayer fractional order capacitors (FOCs). The polymer layers are constructed using a simple drop casting approach. The resulting FOC has two advantages: It can be easily integrated with printed circuit boards, and its constant phase angle (CPA) can be tuned by changing the thickness ratio of the layers. Indeed, our experiments show that the CPA of the fabricated FOCs can
Performance analysis of fractional-order PID controller for a parabolic distributed solar collector 1 min read · Wed, Apr 26 2017 News Circuits FOPID pid Shahrazad Elmetennani, et al., " Performance analysis of fractional-order PID controller for a parabolic distributed solar collector". In 2017 IEEE AFRICON, 2017, 440. Abstract: This paper studies the performance of a fractional-order proportional integral derivative (FOPID) controller designed for parabolic distributed solar collectors. The control problem addressed in concentrated solar collectors aims at forcing the produced heat to follow a desired reference despite the unevenly varying solar irradiance. In addition to the unpredictable variations of the energy source, the parabolic solar
MOFs for the sensitive detection of ammonia: Deployment of fcu-MOF thin films as effective chemical capacitive sensors 1 min read · Wed, Apr 26 2017 News Gas Sensors MOFs Ayalew H. Assen, et al., " MOFs for the sensitive detection of ammonia: Deployment of fcu-MOF thin films as effective chemical capacitive sensors". ACS sensors, 2(9), 2017, 1294. This work reports on the fabrication and deployment of a select metal–organic framework (MOF) thin film as an advanced chemical capacitive sensor for the sensing/detection of ammonia (NH3) at room temperature. Namely, the MOF thin film sensing layer consists of a rare-earth (RE) MOF (RE-fcu-MOF) deposited on a capacitive interdigitated electrode (IDE). Purposely, the chemically stable naphthalene-based RE-fcu-MOF (NDC
Fractal electrochemical microsupercapacitors 1 min read · Wed, Apr 26 2017 News sputtered anhydrous RuO2 thinfilm electrodes prototypes Circuits μSCs Marinal K. Hota, et al., " Fractal electrochemical microsupercapacitors". Advanced Electronic Materials, 3(10), 20171700185. The first successful fabrication of microsupercapacitors (μ‐SCs) using fractal electrode designs is reported. Using sputtered anhydrous RuO2 thin‐film electrodes as prototypes, μ‐SCs are fabricated using Hilbert, Peano, and Moore fractal designs, and their performance is compared to conventional interdigital electrode structures. Microsupercapacitor performance, including energy density, areal and volumetric capacitances, changes with fractal electrode geometry
Ferroelectric Fractional‐Order Capacitors 1 min read · Wed, Apr 26 2017 News Fourier transform infrared spectroscopy Circuits X‐ray diffraction techniques Agamaryat Agambayev, et al., " Ferroelectric Fractional‐Order Capacitors". ChemElectroChem, 4(11), 2017, 2807. Poly(vinylidene fluoride)‐based polymers and their blends are used to fabricate electrostatic fractional‐order capacitors. This simple but effective method allows us to precisely tune the constant phase angle of the resulting fractional‐order capacitor by changing the blend composition. Additionally, we have derived an empirical relationship between the ratio of the blend constituents and the constant phase angle to facilitate the design of a fractional‐order capacitor with a desired
Bio‐Inspired Carbon Monoxide Sensors with Voltage‐Activated Sensitivity 1 min read · Wed, Apr 26 2017 News Biosensors SWCNTs Savagatrup Suchol, et al. "Bio‐Inspired Carbon Monoxide Sensors with Voltage‐Activated Sensitivity." Angewandte Chemie 129 (45) ,2017, 14254. Carbon monoxide (CO) outcompetes oxygen when binding to the iron center of hemeproteins, leading to a reduction in blood oxygen level and acute poisoning. Harvesting the strong specific interaction between CO and the iron porphyrin provides a highly selective and customizable sensor. We report the development of chemiresistive sensors with voltage‐activated sensitivity for the detection of CO comprising iron porphyrin and functionalized single‐walled
Deep thinking brings underwater robot to life 1 min read · Mon, Apr 24 2017 News marine science mechanical engineering robot An international, multidisciplinary collaboration that led to the world’s first underwater robotic avatar.
KAUST-born robotic avatar sets new era for undersea archaeology 1 min read · Thu, Dec 15 2016 News sensors antenna arrays In 2015, an extensive archaeological programme led by the French Ministry of Culture and the University of Montpellier set up a scientific collaboration with Khaled Nabil Salama, Professor from CEMSE Division and co-worker Professor Christian R. Voolstra, from the KAUST Red Sea Research Center, in partnership with Stanford University and Meka Robotics, in California, to develop Ocean One, an agile avatar that affords immediate and haptic-visual interaction â the process of recognizing objects through touch - in the ocean environment at depths greater than 50m.
Rawan Naous: a student with a knack for success 1 min read · Tue, Nov 22 2016 News system on chip wireless communications network Computer architecture "KAUST is a unique place!" said Rawan. "The university has an interdisciplinary environment that offers great opportunities both at academic and social level. Working at KAUST has made possible improving my professional skills while raising a family, a mission impossible for most women out there."
Flash Microfluidics, rapid Lab on a Chip fabrication method for cost- effective in situ production. 1 min read · Thu, Sep 1 2016 News sensors lab-on-a-chip antenna arrays magnetic sensors consumer electronics IoT From DNA sequencing to environment monitoring, microfluidics devices have been broadly employed, but their production is more and more time-consuming and expensive. Researchers from the King Abdullah University of Science and Technology (KAUST), Saudi Arabia, have developed an innovative prototyping method for Lab on a Chip (LOC) production to plummet costs while augmenting performances.
Prof. Salama's paper hits the top for 6 months in the row! 1 min read · Thu, Aug 4 2016 Spotlight News sensors antenna arrays wireless communications network In August 2016, Prof. Salama's article "Stochasticity Modeling in Memristors", was for the sixth time consecutively among the most downloaded paper of the month and the most read article in the IEEE Transactions on Nanotechnology (TNANO).
Three new patents for Professor Khaled Salama and the Sensors Lab Team 1 min read · Wed, Jun 1 2016 News sensors antenna arrays lab-on-a-chip With the latest project on Digital Chaos Systems, KAUST's Associate Professor of Electrical Engineering Khaled Salama and the Sensors-Lab's team (http://sensors.kaust.edu.sa/research/current/digital-chaos-systems) secured stunning achievements and three key patents, opening new frontiers for cybersecurity, cryptography, and electronic devices.
Sneaky losses solved for resistive memory 1 min read · Sat, Apr 30 2016 News electrical engineering A data readout scheme achieves an unprecedented reduction in power consumption for a promising high-performance resistive memory architecture.
Direct mismatch characterization of femtofarad capacitors 1 min read · Tue, Apr 26 2016 News fF poly-insulator-poly PIP Circuits Hesham Omran, et al., "Direct mismatch characterization of femtofarad capacitors" IEEE Transactions on Circuits and Systems II: Express Briefs 63 (2), 2016, 151. Abstract: Reducing the capacitance of programmable capacitor arrays (PCAs), commonly used in analog integrated circuits, is necessary for low-energy applications. However, limited mismatch data are available for small capacitors. We report mismatch measurement for a 2-fF poly-insulator-poly (PIP) capacitor, which is the smallest reported PIP capacitor to the best of the authors' knowledge. Instead of using complicated custom on-chip
Stochasticity Modeling in Memristors 1 min read · Tue, Apr 26 2016 News Circuits Stochasticity memristors Rawan Naous, et al., "Stochasticity modeling in memristors." IEEE Transactions on Nanotechnology 15 (1), 2016, 15. Abstract: Diverse models have been proposed over the past years to explain the exhibiting behavior of memristors, the fourth fundamental circuit element. The models varied in complexity ranging from a description of physical mechanisms to a more generalized mathematical modeling. Nonetheless, stochasticity, a widespread observed phenomenon, has been immensely overlooked from the modeling perspective. This inherent variability within the operation of the memristor is a vital
A light responsive two-component supramolecular hydrogel: a sensitive platform for the fabrication of humidity sensors 1 min read · Tue, Apr 26 2016 News Circuits cgc Suman Samai, et al., "A light responsive two-component supramolecular hydrogel: a sensitive platform for the fabrication of humidity sensors." Soft matter 12 (11), 2016, 2842. The supramolecular assembly of anionic azobenzene dicarboxylate and cationic cetyltrimethylammonium bromide (CTAB) formed a stimuli responsive hydrogel with a critical gelation concentration (CGC) of 0.33 wt%. This self-sustainable two-component system was able to repair damage upon light irradiation. Moreover, it was successfully employed in the fabrication of highly sensitive humidity sensors for the first time.
Flash μ-fluidics: a rapid prototyping method for fabricating microfluidic devices 1 min read · Tue, Apr 26 2016 News Circuits μ-fluidics microfluidic devices Ulrich Buttner, et al., "Flash μ-fluidics: a rapid prototyping method for fabricating microfluidic devices." Rsc Advances 6 (78), 2016, 74822. Microfluidics has advanced in terms of design and structures; however, fabrication methods are time-consuming or expensive relative to facility costs and equipment needed. This work demonstrates a fast and economically viable 2D/3D maskless digital light-projection method based on a stereolithography process. Unlike other fabrication methods, one exposure step is used to form the whole device. Flash microfluidics is achieved by incorporating bonding and
Statistical Analysis for Memristor Crossbar Memories 1 min read · Tue, Apr 26 2016 News memristor Circuits Memories Rawan Naous, et al., "Statistical Analysis for Memristor Crossbar Memories." Int. Journal of Unconventional Computing 12, 2016, 251. The inherent memory capabilities bound with compactness and scalability features pose the memristor as an ideal rival for conventional nonvolatile memories. Its use within a crossbar structure offers high-density storage and tight dimensionality. A fitting parameter in the midst of the trend towards nanoscale integration, where gateless memories are on the rise in an attempt to achieve further space savings. Nonetheless, the gate sacrifice comes at the expense of
A “Twisted” Microfluidic Mixer with “Turbulent” Fluidic Flow for Wide Range of Flowrate Applications 1 min read · Tue, Apr 26 2016 News Biosensors microfluidic Sivashankar Shilpa, et al., "A “Twisted” Microfluidic Mixer with “Turbulent” Fluidic Flow for Wide Range of Flowrate Applications." Biomicrofluidics 10, 2016, 034120. This paper proposes a new “twisted” 3D microfluidic mixer fabricated by a laser writing/microfabrication technique. Effective and efficient mixing using the twisted micromixers can be obtained by combining two general chaotic mixing mechanisms: splitting/recombining and chaotic advection. The lamination of mixer units provides the splitting and recombination mechanism when the quadrant of circles is arranged in a two-layered
Single-readout high-density memristor crossbar 1 min read · Tue, Apr 26 2016 News memristor Circuits high-density Mohammed A. Zidan, et al., "Single-readout high-density memristor crossbar." Scientific reports 6, 2016, 18863. High-density memristor-crossbar architecture is a very promising technology for future computing systems. The simplicity of the gateless-crossbar structure is both its principal advantage and the source of undesired sneak-paths of current. This parasitic current could consume an enormous amount of energy and ruin the readout process. We introduce new adaptive-threshold readout techniques that utilize the locality and hierarchy properties of the computer-memory system to address the
Zinc Oxide Integrated Wavy Channel Thin-Film Transistor-Based High-Performance Digital Circuits 1 min read · Tue, Apr 26 2016 News Circuits Zinc Oxide Amir N. Hanna, , et al., "Zinc oxide integrated wavy channel thin-film transistor-based high-performance digital circuits." IEEE Electron Device Letters 37 (2), 2016, 193. Abstract: High-performance thin film transistor (TFT) can be a great driving force for display, sensor/actuator, integrated electronics, and distributed computation for the Internet of Everything applications. While semiconducting oxides, such as zinc oxide (ZnO), present promising opportunity in that regard, still wide area of improvement exists to increase the performance further. Here, we show a wavy channel (WC)
Wavy Channel TFT-Based Digital Circuits 1 min read · Tue, Apr 26 2016 News Circuits TFT digital circuits Amir N. Hanna, et al., "Wavy Channel TFT-Based Digital Circuits." IEEE Transactions on Electron Devices 63 (4), 2016, 1550. Abstract: We report a wavy channel (WC) architecture thin-film transistor-based digital circuitry using ZnO as a channel material. The novel architecture allows for extending device width by integrating vertical finlike substrate corrugations giving rise to 50% larger device width, without occupying extra chip area. The enhancement in the output drive current is 100%, when compared with conventional planar architecture for devices occupying the same chip area. The current
Matching properties of femtofarad and sub-femtofarad MOM capacitors 1 min read · Tue, Apr 26 2016 News Circuits MOM capacitors Hesham Omran, et al., "Matching properties of femtofarad and sub-femtofarad MOM capacitors." IEEE Transactions on Circuits and Systems I 63 (6) ,2016, 763. Small metal-oxide-metal (MOM) capacitors are essential to energy-efficient mixed-signal integrated circuit design. However, only few reports discuss their matching properties based on large sets of measured data. In this paper, we report matching properties of femtofarad and sub-femtofarad MOM vertical-field parallel-plate capacitors and lateral-field fringing capacitors. We study the effect of both the finger-length and finger-spacing on
Integration of fractal biosensor in a digital microfluidic platform 1 min read · Tue, Apr 26 2016 News Biosensors digital microfluidic Circuits Yousof Mashraei, et al., "Integration of fractal biosensor in a digital microfluidic platform." IEEE Sensors Journal 16 (24), 2016, 8775. Abstract: The digital microfluidic (DMF) platform introduces many applications in biomedical assays. If it is to be commercially available to the public, it needs to have the essential features of smart sensing and a compact size. In this paper, we report on a fractal electrode biosensor that is used for both droplet actuation and sensing C-reactive protein (CRP) concentration levels to assess cardiac disease risk. Our proposed electrode is the first two
Experimental Verification of on Chip CMOS Fractional-Order Capacitor Emulators 1 min read · Tue, Apr 26 2016 News Circuits Georgia Tsirimokou, et al., "Experimental verification of on-chip CMOS fractional-order capacitor emulators." Electronics Letters 52 (15) , 2016, 1298. The experimental results from a fabricated integrated circuit of fractional-order capacitor emulators are reported. The chip contains emulators of capacitors of orders 0.3, 0.4, 0.5, 0.6 and 0.7 with nano-Farad pseudo-capacitances that can be adjusted through a bias current. Two off-chip capacitors are used to set the bandwidth of each emulator independently. The chip was designed in Austria microsystems (AMS) 0.35μ CMOS.
A 45.8 fJ/Step, energy-efficient, differential SAR capacitance-to-digital converter for capacitive pressure sensing 1 min read · Tue, Apr 26 2016 News Abdulaziz Alhoshany, et al., " A 45.8 fJ/Step, energy-efficient, differential SAR capacitance-to-digital converter for capacitive pressure sensing". Sensors and Actuators A: Physical, 245, 2016, 10. An energy-efficient readout circuit for a capacitive sensor is presented. The capacitive sensor is digitized by a 12-bit energy efficient capacitance-to-digital converter (CDC) that is based on a differential successive-approximation architecture. This CDC meets extremely low power requirements by using an operational transconductance amplifier (OTA) that is based on a current-starved inverter. It
Wide-range adaptive RF-to-DC power converter for UHF RFIDs 1 min read · Tue, Apr 26 2016 News Circuits RF CMOS Mahmoud H. Ouda, et al., "Wide-range adaptive RF-to-DC power converter for UHF RFIDs." IEEE Microwave and Wireless Components Letters 26 (8), 2016, 634. A wide-range, differential, cross-coupled rectifier is proposed with an extended dynamic range of input RF power that enables wireless powering from varying distances. The proposed architecture mitigates the reverse-leakage problem in conventional, cross-coupled rectifiers without degrading sensitivity. A prototype is designed for UHF RFID applications, and is implemented using 0.18 μm CMOS technology. On-chip measurements demonstrate a
Pilot assisted readout for passive memristor crossbars 1 min read · Tue, Apr 26 2016 News Circuits memristors Rawan Naous, et al., "Pilot assisted readout for passive memristor crossbars." Microelectronics Journal 54, 2016 48. The high demands for performance and energy efficiency pose significant challenges for computational systems. Memristor-based crossbar architectures are actively considered as vital rivals for the traditional solutions. Nonetheless, density and energy driven passive array structures, that lack a switching control per cell, suffer from sneak paths that limit the range of accurate operation of the crossbar array. In this paper, the crossbar array is treated as a communication
Cloaking through cancellation of diffusive wave scattering 1 min read · Tue, Apr 26 2016 News Circuits wave scattering Mohamed Farhat, et al., "Cloaking through cancellation of diffusive wave scattering." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, 2016, 20160276. A new cloaking mechanism, which makes enclosed objects invisible to diffusive photon density waves, is proposed. First, diffusive scattering from a basic core–shell geometry, which represents the cloaked structure, is studied. The conditions of scattering cancellation in a quasi-static scattering regime are derived. These allow for tailoring the diffusivity constant of the shell enclosing the object so
Compatibility analysis of 3D printer resin for biological applications 1 min read · Tue, Apr 26 2016 News pcr Circuits uv Shilpa Siyashankar, et al., "Compatibility analysis of 3D printer resin for biological applications" Micro & Nano Letters, 11 (10), 2016, 654. The salient features of microfluidics such as reduced cost, handling small sample and reagent volumes and less time required to fabricate the devices has inspired the present work. The incompatibility of three-dimensional printer resins in their native form and the method to improve their compatibility to many biological processes via surface modification are reported. The compatibility of the material to build microfluidic devices was evaluated in
Memristor-based neural networks: Synaptic versus neuronal stochasticity 1 min read · Tue, Apr 26 2016 News memristor Circuits neuronal stochasticity Rawan Naous, et al., "Memristor-based neural networks: Synaptic versus neuronal stochasticity." Aip Advances 6, (11), 2016, 111304. In neuromorphic circuits, stochasticity in the cortex can be mapped into the synaptic or neuronal components. The hardware emulation of these stochastic neural networks are currently being extensively studied using resistive memories or memristors. The ionic process involved in the underlying switching behavior of the memristive elements is considered as the main source of stochasticity of its operation. Building on its inherent variability, the memristor is
Ocean One: A Robotic Avatar for Oceanic Discovery 1 min read · Tue, Apr 26 2016 News Biosensors Robotic Avatar Oceanic Discovery Oussama Khatib, et al., "Ocean one: A robotic avatar for oceanic discovery." IEEE Robotics & Automation Magazine 23 (4), 2016, 20. The promise of oceanic discovery has long intrigued scientists and explorers, whether with the idea of studying underwater ecology and climate change or with the hope of uncovering natural resources and historic secrets buried deep in archaeological sites. This quest to explore the oceans requires skilled human access, yet much of the oceans are inaccessible to human divers; nearly ninetenths of the ocean floor is at 1 km or deeper . Accessing these depths is
Disposable, paper-based, inkjet-printed humidity and H2S gas sensor for passive sensing applications 1 min read · Tue, Apr 26 2016 News Gas Sensors fully passive sensor inkjetprinted humidity gas sensing Abdul Quddious, et al., " Disposable, paper-based, inkjet-printed humidity and H2S gas sensor for passive sensing applications" . Sensors, 16 (12), 2016, 2073. An inkjet-printed, fully passive sensor capable of either humidity or gas sensing is presented herein. The sensor is composed of an interdigitated electrode, a customized printable gas sensitive ink and a specialized dipole antenna for wireless sensing. The interdigitated electrode printed on a paper substrate provides the base conductivity that varies during the sensing process. Aided by the porous nature of the substrate, a change in
H2S Sensors: Fumarate‐Based fcu‐MOF Thin Film Grown on a Capacitive Interdigitated Electrode 1 min read · Tue, Apr 26 2016 News h2s Gas Sensors MOFs Omar Yassine, et al., " H2S Sensors: Fumarate‐Based fcu‐MOF Thin Film Grown on a Capacitive Interdigitated Electrode". Angewandte Chemie International Edition, 55 (51), 2016, 15879. Herein we report the fabrication of an advanced sensor for the detection of hydrogen sulfide (H2S) at room temperature, using thin films of rare‐earth metal (RE)‐based metal–organic framework (MOF) with underlying fcu topology. This unique MOF‐based sensor is made via the in situ growth of fumarate‐based fcu‐MOF (fum‐fcu‐MOF) thin film on a capacitive interdigitated electrode. The sensor showed a remarkable
Professor Khaled Salama awarded US patent on MEMS fractal capacitors 1 min read · Tue, Mar 8 2016 News sensors lab-on-a-chip antenna arrays Patent application US 20140239446 A1 on "Fractal Structures For Fixed MEMS Capacitors" was awarded a USA patent.
Published paper: Single readout technique published at Nature Scientific Reports 1 min read · Fri, Feb 5 2016 News single readout technique sensors lab-on-a-chip Prof. Khaled Salama and his team managed to achieve the theoretical limit of a single memory access per pixel for a gateless memristor array readout at a fraction of the power of state-of-the-art readout techniques.
Miniature flexible sensor to detect heart disease 1 min read · Sat, Nov 14 2015 News cardiovascular sensors electrical engineering A new biosensor made of laser-etched electrodes on a gold-coated polymer may provide an effective and cost-efficient way to assess heart disease risk.
New low cost diagnostic for cardiovascular risk detection 1 min read · Thu, Oct 8 2015 News sensors lab-on-a-chip antenna arrays A new flexible, low-cost cardiovascular risk marker biosensor was developed by Prof. Khaled Salama and his team at KAUST University, Saudi Arabia.
Perfect absorption graphene style 1 min read · Sat, Jun 27 2015 News nanotechnology electrical engineering material science and engineering A tiny device broadens the bandwith to enable absorption with wide-reaching potential for electrical engineering.
Ms Student wins the First Phase of the 10th Annual International Microelectronics Olympiad of Armenia 1 min read · Sat, May 30 2015 News Spotlight wireless powering energy harvesting composite magnets Abdullah Almansouri, a MS student in the electro-physics track within the Electrical Engineering program, won the first phase of the 10th Annual International Microelectronics Olympiad of Armenia.
Compensated readout for high-density MOS-gated memristor crossbar array 1 min read · Sun, Apr 26 2015 News Circuits memristor crossbar array Mohamed Zidan, et al., "Compensated readout for high-density MOS-gated memristor crossbar array." IEEE Transactions on Nanotechnology 14 (1), 2014, 3. Leakage current is one of the main challenges facing high-density MOS-gated memristor arrays. In this study, we show that leakage current ruins the memory readout process for high-density arrays, and analyze the tradeoff between the array density and its power consumption. We propose a novel readout technique and its underlying circuitry, which is able to compensate for the transistor leakage-current effect in the high-density gated memristor
