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A “Twisted” Microfluidic Mixer with “Turbulent” Fluidic Flow for Wide Range of Flowrate Applications

1 min read ·
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

A hybrid modular microfluidic device for emulsion generation

1 min read ·
Zhengyuan Zhou, et al., "A hybrid modular microfluidic device for emulsion generation". Sensors and Actuators A: Physical 280, 2018, 422. We report a novel modular plug-and-play microfluidic device for versatile emulsion generation, which consists of three parts: a top module for the dispersed phase supply, a glass capillary for emulsion creation and a bottom module for the continuous phase supply. By combining different modules and tapered glass capillaries, single emulsions, Janus emulsions and double emulsions have been successfully produced. The hybrid strategy allows us to produce smaller
<> microfluidics (2) <> MIPs (2)

One-step Electrosynthesized Molecularly Imprinted Polymer on Laser Scribed Graphene Bisphenol A Sensor

1 min read ·
Tutku Beduk, et al., "One-step Electrosynthesized Molecularly Imprinted Polymer on Laser Scribed Graphene Bisphenol A Sensor." Sensors and Actuators B: Chemical 314, 2020, 128026. Bisphenol A (BPA) is a toxic chemical used by industries for production of containers for storage of food and beverages leading to possible health risks. In this work, we present a simple, mask-free, low-cost imprinted sensor based on laser scribed graphene (LSG) technology combined to molecularly imprinted polymers (MIPs) for BPA determination. CO2 laser was used in production of LSG electrodes with high

Abdellatif Ait Lahcen

Postdoctoral Research Fellow, Sensors
Dr. Abdellatif Ait Lahcen is currently a Postdoctoral Research Fellow at the Sensors Lab, in the Electrical Engineering Department, CEMSE, King Abdullah University of Science and Technology (KAUST). Education and Early Career Before joining the King Abdullah University of Science and Technology (KAUST) in Kingdom of Saudi Arabia on March 2019 as a Postdoctoral Research Fellow, I was performing my research at the department of Analytical Chemistry, University of Cadiz (Spain) as well as in the laboratory of Process Engineering and Environment at Hassan II University of Casablanca in Morocco. I
<> modeling (2) <> MoS2 (2)

Experimental Verification of a Fractional-Order Wien Oscillator Built Using Solid-State Capacitors

1 min read ·
Kartci, Aslihan, et al. "Experimental Verification of a Fractional-Order Wien Oscillator Built Using Solid-State Capacitors." 2018 IEEE 61st International Midwest Symposium on Circuits and Systems (MWSCAS). IEEE, 2018, 544. A new type of fractional-order capacitors (FOCs) is fabricated using a molybdenum disulfide (MoS 2 )-ferroelectric polymer composite. The phase angle of this FOC's impedance remains constant between 100 Hz and 10MHz with only a small deviation of ±4 degrees. The performance of the fabricated FOCs is further tested using the well-known Wien oscillator. The main motivation of

An ultra-broadband single-component fractional-order capacitor using MoS2-ferroelectric polymer composite

1 min read ·
Agamyrat Agambayev, et al., "An ultra-broadband single-component fractional-order capacitor using MoS2-ferroelectric polymer composite". Applied Physics Letters, 113(9),2018, 093505. The phase angle of a fractional-order capacitor's (FOC) impedance has a constant value between −90°−90° and 0°0°. Maintaining this value over a broad frequency band is of utmost importance since it increases the applicability of the electrical circuit that employs the fractional-order capacitor (FOC). In this work, a molybdenum disulfide (MoS2)-ferroelectric polymer composite is used to design/fabricate an FOC
<> MXene (2) <> nanotechnology (2) <> Network Design (2) <> neural network (2) <> Neural Seizure Detection (2)

Linear and nonlinear feature extraction for neural seizure detection

1 min read ·
Elgammal, M. et al., "Linear and nonlinear feature extraction for neural seizure detection" In 2018 IEEE 61st International Midwest Symposium on Circuits and Systems (MWSCAS), 2018, 795. In this paper, both linear and nonlinear features have been reviewed with linear support vector machine (SVM) classifier for neural seizure detection. The work introduced in the paper includes performance measurement through different metrics: accuracy, sensitivity, and specificity of multiple linear and nonlinear features with linear support vector machine (SVM). A comparison is performed between the

A Comparison of Artificial Neural Network (ANN) and Support Vector Machine (SVM) Classifiers for Neural Seizure Detection

1 min read ·
Elgammal, M, et al., "A Comparison of Artificial Neural Network (ANN) and Support Vector Machine (SVM) Classifiers for Neural Seizure Detection". IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS) 2019, 646. In this paper, two different classifiers are software and hardware implemented for neural seizure detection. The two techniques are support vector machine(SVM) and artificial neural networks(ANN). The two techniques are pretrained on software and only the classifiers are hardware implemented and tested. A comparison of the two techniques is performed on the levels
<> Neuromorphic Circuits (2) <> Non-Terrestrial Networks (2) <> nonlinear models (2) <> OFET (2)

Dr Sandeep's review on OFET is out

1 min read ·
We are excited to share our review on Organic Field Effect Transistors sensing platforms. This is Dr Sandeep's first paper with the group and more to come soon. Organic field effect transistors (OFETs) have been the focus of sensing application research over the last two decades. The challenges and possible future directions of OFET arrays in embedded sensing platforms are presented. More details at: Sandeep G.Surya, Harshil N.Raval, Rafiq Ahmad, PrashantSonar, Khaled N.Salama, V.Ramgopal Rao, Organic field effect transistors (OFETs) in environmental sensing and health monitoring: A review

Realization of an Ultrasensitive and Highly Selective OFET NO2 Sensor: The Synergistic Combination of PDVT-10 Polymer and Porphyrin–MOF

1 min read ·
Saravanan Yuvaraja, et al., "Realization of an Ultrasensitive and Highly Selective OFET NO2 Sensor: The Synergistic Combination of PDVT-10 Polymer and Porphyrin–MOF." ACS Applied Materials & Interfaces 12 (16), 2020, 18748. Organic field-effect transistors (OFETs) are emerging as competitive candidates for gas sensing applications due to the ease of their fabrication process combined with the ability to readily fine-tune the properties of organic semiconductors. Nevertheless, some key challenges remain to be addressed, such as material degradation, low sensitivity, and poor selectivity toward
<> OFETs (2)

Organic field effect transistors (OFETs) in environmental sensing and health monitoring: A review

1 min read ·
Sandeep G. Surya, et al., "Organic Field Effect Transistors (OFETs) in Environmental Sensing and Health Monitoring: A review, Trends in Analytical Chemistry 111, 2019, 27. Abstract: Organic field effect transistors (OFETs) have been the focus of sensing application research during the last two decades. In comparison to their inorganic counterparts, OFETs have multiple advantages such as low-cost manufacturing, large area coverage, flexibility, and readily tunable electronic material properties. To date, various organic semiconductors (OSCs), both polymers and small molecules, have been

Organic Field-Effect Transistor-Based Flexible Sensors

1 min read ·
Saravanan Yuvaraja et al., "Organic Field-Effect Transistor-Based Flexible Sensors" Chemical Society Reviews 2020, (Advanced Article). (12) 49, 2020, 3423. Flexible electronic devices have attracted a great deal of attention in recent years due to their flexibility, reduced complexity and lightweight. Such devices can conformably attach themselves to any bendable surface and can possess diverse transduction mechanisms. Consequently, with continued emphasis on innovation and development, major technological breakthroughs have been achieved in this area. This review focuses on the advancements
<> Optical communications (2) <> optical computing (2) <> organic electronics (2) <> pollution (2) <> Programming language (2) <> Python (2) <> quantum communication (2) <> Random number generator (2)

Random number generation based on digital differential chaos

1 min read ·
Mohamed Zidan, et al., "Random number generation based on digital differential chaos." In 2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS), 2011, 1. In this paper, we present a fully digital differential chaos based random number generator. The output of the digital circuit is proved to be chaotic by calculating the output time series maximum Lyapunov exponent. We introduce a new post processing technique to improve the distribution and statistical properties of the generated data. The post-processed output passes the NIST Sp. 800-22 statistical tests. The system

Fully digital jerk-based chaotic oscillators for high throughput pseudo-random number generators up to 8.77 Gbitss

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Abhinav S. Mansingka, et al., "Fully digital jerk-based chaotic oscillators for high throughput pseudo-random number generators up to 8.77 Gbitss" Microelectronics Journal 44, (9), 2013, 744. Abstract: This paper introduces fully digital implementations of four different systems in the 3rd order jerk-equation based chaotic family using the Euler approximation. The digitization approach enables controllable chaotic systems that reliably provide sinusoidal or chaotic output based on a selection input. New systems are introduced, derived using logical and arithmetic operations between two system
<> Rectifiers (2)

All‐Oxide Thin Film Transistors and Rectifiers Enabling On‐Chip Capacitive Energy Storage

1 min read ·
Wang Zhenwei, et al., "All‐Oxide Thin Film Transistors and Rectifiers Enabling On‐Chip Capacitive Energy Storage." Advanced Electronic Materials 5 (12), 2019, 1900531. All-oxide, fully-transparent thin film transistors and rectifiers, processed entirely by atomic layer deposition, have been developed for on-chip capacitive energy storage. Fully depleted thin film transistor (TFT) operation is achieved by optimizing the carrier concentration in the ZnO channels. The TFTs show an average saturation mobility of 10.5 cm2 V−1 s−1, a stable positive turn-on voltage of 0.88 V, a low subthreshold

Mahmoud Ouda

Postdoctoral Research Fellow, Sensors
Mahmoud Ouda is currently a Postdoctoral Research Associate with the Communications and Signal Processing Group (CSP), Department of Electrical and Electronic Engineering at Imperial College London. He received his Ph.D. from King Abdullah University of Science & Technology (KAUST), Saudi Arabia in 2016, and his M.Sc. and B.Sc. (with honors) both in Electronics and Communications Engineering from Ain Shams University, Cairo, Egypt, in 2011 and 2006 respectively. He was a Graduate Research Assistant with the Sensors Lab. in King Abdullah University of Science & Technology (KAUST) from 2010 to
<> sensing platforms (2) <> SO2 (2)

Highly sensitive and selective SO2 MOF sensor: the integration of MFM-300 MOF as a sensitive layer on a capacitive interdigitated electrode

1 min read ·
Valeriya Chernikova, et al., "Highly sensitive and selective SO2 MOF sensor: the integration of MFM-300 MOF as a sensitive layer on a capacitive interdigitated electrode." Journal of Materials Chemistry A 6(14), 2018, 5550. We report on the fabrication of an advanced chemical capacitive sensor for the detection of sulfur dioxide (SO2) at room temperature. The sensing layer based on an indium metal–organic framework (MOF), namely MFM-300, is coated solvothermally on a functionalized capacitive interdigitated electrode. The fabricated sensor exhibits significant detection sensitivity to SO2 at

Fluorinated MOF Platform for Selective Removal and Sensing of SO 2 from Flue Gas and Air

1 min read ·
Mohamad Tchalala, et al., " Fluorinated MOF Platform for Selective Removal and Sensing of SO 2 from Flue Gas and Air", Nature communications, 10(1), 2019, 1. Conventional SO2 scrubbing agents, namely calcium oxide and zeolites, are often used to remove SO2 using a strong or irreversible adsorption-based process. However, adsorbents capable of sensing and selectively capturing this toxic molecule in a reversible manner, with in-depth understanding of structure–property relationships, have been rarely explored. Here we report the selective removal and sensing of SO2 using recently unveiled
<> spiking neural networks (2)

Unsupervised adaptive weight pruning for energy-efficient neuromorphic systems Frontiers in Neuroscience, section Neuromorphic Engineering.

1 min read ·
Wenzhe Guo, et al., "Unsupervised Adaptive Weight Pruning for Energy-Efficient Neuromorphic Systems." Frontiers in Neuroscience 14, 2020, 1189. To tackle real-world challenges, deep and complex neural networks are generally used with a massive number of parameters, which require large memory size, extensive computational operations, and high energy consumption in neuromorphic hardware systems. In this work, we propose an unsupervised online adaptive weight pruning method that dynamically removes non-critical weights from a spiking neural network (SNN) to reduce network complexity and improve

Wenzhe Guo

Wenzhe Guo is currently a PhD student at the Sensors Lab, in the Electrical Engineering Department, CEMSE, King Abdullah University of Science and Technology (KAUST). Education and Early Career Wenzhe Guo received his B.S. majored in integrated circuits design from University of Electronic Science and Technology of China (UESTC) in 2017. He got admitted to KAUST and obtained MS degree at Electrical Engineering department in KAUST in 2018. Research Interests My research interests lie in design and implementation of brain-inspired computational algorithm, exploration of neuromorphic computing
<> Stochastic processes (2) <> Stochasticity (2) <> thin film transistor TFT (2)

Fully Transparent Transceiver Using Single Binary Oxide Thin Film Transistors

1 min read ·
Ali Hassan, et al., "Fully Transparent Transceiver Using Single Binary Oxide Thin Film Transistors." Advanced Electronic Materials 6, 2020, 1901083. Using one binary oxide, a fully transparent thin‐film transistor (TFT)‐based transceiver circuit is presented. The proposed transceiver circuit is fabricated entirely using an atomic layer deposition process. Moreover, the proposed circuit presents two modulation schemes: frequency shift keying and ON/OFF keying. The fabricated TFTs exhibit saturation mobility, threshold voltage, a subthreshold swing, and an ON/OFF ratio of 18.2 cm 2 V− 1 s− 1, 0

Fully Integrated Indium Gallium Zinc Oxide NO2 Gas Detector

1 min read ·
Mani Teja Vijjapu, et al.,"Fully Integrated Indium Gallium Zinc Oxide NO2 Gas Detector." ACS Sensors 5 (4), 2020, 984. We report an amorphous indium gallium zinc oxide (IGZO)-based toxic gas detection system. The microsystem contains an IGZO thin-film transistor (TFT) as a sensing element and exhibits remarkable selectivity and sensitivity to low concentrations of nitrogen dioxide (NO 2). In contrast to existing metal oxide-based gas sensors, which are active either at high temperature or with light activation, the developed IGZO TFT sensor is operable at room temperature and requires only
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