Olfa Kanoun

• Prof. Dr.-Ing.
• Professor at Chemnitz University of Technology

In the last decade, significant developments of flexible and stretchable force sensors have been witnessed in order to satisfy the demand of several applications in robotic, prosthetics, wearables and structural health monitoring bringing decisive advantages due to their manifold customizability, easy integration and outstanding performance in term...

Electrochemical sensors play a significant role in detecting chemical ions, molecules, and pathogens in water and other applications. These sensors are sensitive, portable, fast, inexpensive, and suitable for online and in-situ measurements compared to other methods. They can provide the detection for any compound that can undergo certain transform...

Advanced sensors are becoming essential for modern factories, as they contribute by gathering comprehensive data about machines, processes, and human-machine interaction. They play an important role in improving manufacturing performance, in-factory logistics, predictive maintenance, supply chains, and digitalization in general. Wireless sensors an...

In this paper, the relative humidity sensor properties of graphene oxide (GO) and graphene oxide/multiwalled nanotubes (GO/MWNTs) composites have been investigated. Composite sensors were fabricated by direct laser scribing and characterized using UV-vis-NIR, Raman, Fourier transform infrared, and X-ray photoemission spectroscopies, electron scanni...

A bistable effect on a laminate structure with a piezoelectric patch was tested to harvest kinetic energy. The composite bistable plate was prepared in the autoclave with two different orientations of the glass fibers. The dynamic tests were performed on the universal testing machine using cyclic vertical compression excitation. During the tests, t...

Phosphate concentration is an important indicator of water quality, specifically for eutrophication levels in the presence of algae. Several analytical techniques have been proposed for phosphate monitoring, and most of them are based on indirect methods. In this study, we propose a new reagent-less direct method for the electrochemical detection o...

In this work, we explore the hybridization of multi-walled carbon nanotubes (MWCNT)-PDMS composite with natural doom palm leaf fibres (DPLF) to investigate the potential use of this novel material for pressure-sensing applications. To understand the properties of the resulting hybrid composite, we investigated the natural palm fibres by structural...

A high-performance electrochemical sensor for methyl parathion (MP) detection was developed using silver nanoparticles (AgNPs) integrated with graphene oxide/ionic liquid (GO/IL) on a screen-printed electrode (AgNPs@GO/IL@SPCE) for enhanced sensitivity and stability.

The rapid advancement of edge computing and Tiny Machine Learning (TinyML) has created new opportunities for deploying intelligence in resource-constrained environments. With the growing demand for intelligent Internet of Things (IoT) devices that can efficiently process complex data in real-time, there is an urgent need for innovative optimisation...

Methanol, a toxic volatile compound, poses significant threats to human health and the environment. Traditional methanol sensors require high operating temperatures, exhibit poor selectivity, and have limited long-term stability, which restricts their application in portable methanol monitoring devices. This study proposes a flexible chemoresistive...

Bolted connections are extensively used in construction and machine design, playing critical roles in various industrial applications. Bolts and screws are, however, prone to loosening or separating due to factors such as shock, vibration, and temperature fluctuations. This self-loosening phenomenon poses a considerable challenge to the reliability...

Accurate relative humidity (RH) measurement is critical in many applications, from process control and material preservation to ensuring human comfort and well-being. This study presents high-performance humidity sensors based on titanium oxide nanoparticles/graphene oxide (TiO2/GO) composites, which demonstrate excellent sensing capabilities compa...

Laser reduction of graphene oxide (GO) is a promising approach for achieving flexible, robust, and electrically conductive graphene/polymer composites. Resulting composite materials show significant technological potential for energy storage, sensing, and bioelectronics. However, in the case of insulating polymers, the properties of electrodes show...

Objective. Electrical Impedance Tomography (EIT) is a non-invasive technique used for lung imaging. A significant challenge in EIT is reconstructing images of deeper thoracic regions due to the low sensitivity of boundary voltages to internal conductivity variations. The current injection pattern is decisive as it influences the current path, bound...

Objective. Electrical Impedance Tomography (EIT) is a non-invasive technique used for lung imaging. A significant challenge in EIT is reconstructing images of deeper thoracic regions due to the low sensitivity of boundary voltages to internal conductivity variations. The current injection pattern is decisive as it influences the current path, bound...

Field capacity (F.C.) is a crucial parameter in soil analysis, defining the limits of plant-available moisture content. Integrating this concept into sensing technology provides valuable information for optimizing irrigation scheduling by determining the appropriate timing and quantity of irrigation, thereby preventing crop damage. This article pre...

Designing an efficient Inductive Power Transfer (IPT) system involves significant challenges. On the transmitter side, it is essential to provide the transmitter coil with an alternating current (AC) operating within the kHz-MHz frequency range, which is generally generated by inverters linked to an intermediate direct current (DC) bus. While metho...

Malathion (MLT), a widely used organophosphate pesticide for global pest control, presents substantial risks to both human health and ecosystems. Therefore, the development of a rapid and efficient detection method is critical to mitigate its harmful effects. This study proposes a novel thin-film impedimetric sensor designed for the reliable detect...

This paper presents the design and fabrication of Fil3D-Hand, a humanoid robotic hand with five fingers integrating nanocomposite filament strain sensors to monitor finger movements. The objective is to replicate the functionality of the human hand through an affordable design, with potential applications in humanoid robotics and prosthetic rehabil...

Bolted connections are extensively used in construction and machine design, playing critical roles in various industrial applications. Bolts and screws are, however, prone to loosening or separating due to factors such as shock, vibration, and temperature fluctuations. This self-loosening phenomenon poses a significant challenge to the reliability...

Laser reduction of graphene oxide (GO) is a promising approach for realizing flexible, robust, and electrically conductive graphene/polymer composites. Resulting composite materials show significant technological potential for energy storage, sensing, and bioelectronics. However, in the case of insulating polymers, the properties of electrodes show...

Die Erkennung von Schienenfehlern ist aufgrund vieler fahrzeug- und schienenseitiger Einflussbedingungen komplex. Der Vorteil beim Einsatz der Schwingungsdiagnose besteht in der Schmutzunempfindlichkeit und der Wartungsfreiheit und ist für die mobile und indirekte Erfassung der Schienenoberflächentopologie geeignet. Für die schwingungsbasierte Erke...

Enhancing the supercapacitors’ performance relies on the increased capacitance and voltage window, which are the current key challenges for developing new materials. In this study, the mononuclear NiII‐bis(oxamato) complex ([ⁿBu4N]2[Ni(opba)], 1) has been synthesized and used as a template in polypyrrole (PPy) based conductive polymer as a novel el...

We have recently reported laser-induced fibers (LIF) as a promising nanomaterial that possesses good electrochemical activity and are easily manufacturable. In this paper, for the first time, the application of LIF as functionalization materials on laser-induced graphene (LIG) electrodes for the detection of nitrate is demonstrated. The as-fabricat...

Among biobased materials, date palm leaf fiber (DPLF) is a cellulose-rich fiber with considerable potential for use in sustainable composites, where it can improve mechanical properties and reduce weight. In this study, a flexible piezoelectric generator (PEG) composed of a polydimethylsiloxane (PDMS) polymer, lead-free barium titanate (BaTiO3), an...

The increasing need for wearable and portable electronics and the necessity to provide a continuous power supply to these electronics have shifted the focus of scientists toward harvesting energy from ambient sources. Harvesting energy from ambient sources, including solar, wind, and mechanical energies, is a solution to meet rising energy demands....

One of the most promising approaches to food quality assessments is the use of impedance spectroscopy combined with machine learning. Thereby, feature selection is decisive for a high classification accuracy. Physically based features have particularly significant advantages because they are able to consider prior knowledge and to concentrate the d...

The use of fertilizers is inevitable and critical at the same time. Overfertilization harms the environment and humans, when excess substances enter groundwater and accumulate in drinking water. This is especially an issue for nitrate. Well-distributed measurements of concentrations are urgently needed. Current measurement solutions are often too e...

Zusammenfassung Anregungssignale spielen bei der Impedanzspektroskopie eine Schlüsselrolle und müssen in Bezug auf Signalform, Amplitude und Signaldauer optimiert werden. Anregungssignale mit einer sehr geringen Amplitude führen zu einem verrauschten Messergebnis, während Signale mit einer hohen Amplitude zu erheblichen Stabilitätsproblemen für den...

The study presented here addresses the influence of turbidity on UV/Vis spectroscopy measurements of water bodies, a factor that affects the accurate identification and quantification of substances. The novelty of the developed turbidity compensation method is its applicability over the entire UV/Vis spectrum (250 – 900 nm), enabling the accurate d...

Hybrid piezoelectric nanocomposites (HPCs) for nanogenerators are strongly dependent on the properties of the used materials. Traditional methods like solid-state approaches yield low piezoelectric properties, leading to nanogenerators (PENGs) with reduced capabilities. In this work, the piezoelectric material composition Ba0.85Ca0.15Zr0.10 Ti0.90O...

The field of Internet of Things (IoT) technologies is advancing rapidly, driven by the critical need for autonomous and sustainable wireless sensor networks [...]

The equivalent electrical circuit approach is explored to improve a bioimpedance-based transducer for measuring the bioavailability of synthetic insulin already presented in previous studies. In particular, the electrical parameter most sensitive to the variation of insulin amount injected was identified. Eggplants were used to emulate human electr...

Complexes tris((1-ferrocenyl-1H-1,2,3-triazol-4-yl)methyl)amine (3), bis((1-ferrocenyl-1H-1,2,3-triazol-4-yl)methyl)amine (6), bis((1-ferrocenyl-1H-1,2,3-triazol-4-yl)methyl)ether (7), and 1-ferrocenyl-1H-1,2,3-triazol-4-yl)methanamine (9) were synthesized using the copper-catalyzed click reaction. Complexes 3, 6, 7, and 9 were characterized using...

In the modern era of the Internet of Things, the potential role of flexible piezoelectric generators (PEG) reflects the rapid increase in self-powered devices and wearable technologies. In this study, a casting process to elaborate the polydimethylsiloxane (PDMS)/barium titanate (BaTiO3) composite has been presented. The addition of 15 wt % BaTiO3...

This paper proposes biosensors designed specifically for dielectric spectroscopy on biological cells while they are in their liquid culture medium, covering the microwave frequency spectrum from 10 GHz to 50 GHz. This frequency range is suitable for measurements with very low concentrations of cells. The biosensors are designed by integrating an in...

Citation: Adiraju, A.; Brahem, A.; Lu, T.; Al-Hamry, A.; Zhou, Y.; Wei, L.; Jalasutram, A.; Tegenkamp, C.; Halouani, K.; Kanoun, O. Electrochemical Enrichment of Biocharcoal Modified on Carbon Electrodes for the Detection of Nitrite and Paraxon Ethyl Pesticide. J. Compos. Sci. 2024, 8, 217. https:// Abstract: Biocharcoal (BioC), a cost-effective, e...

Effective feature extraction and selection are crucial for the accurate classification and prediction of hand gestures based on electromyographic signals. In this paper, we systematically compare six filter and wrapper feature evaluation methods and investigate their respective impacts on the accuracy of gesture recognition. The investigation is ba...

Flexible temperature sensors are becoming increasingly important these days. In this work, we explore graphene oxide (GO)/poly(vinyl alcohol) (PVA) nanocomposites for potential application in temperature sensors. The influence of the mixing ratio of both materials, the reduction temperature, and passivation on the sensing performance has been inves...

Impedance measurement ICs are widely used in embedded systems for single-sensor measurements. The impedance value of the target sensor is calculated by comparing its measurement signal with one of a given reference element. This is known as the calibration concept. To automate the calibration process and to enable the multi-sensor measurements, mul...

Electrical impedance tomography (EIT) is a promising non‐invasive imaging technique that visualizes the electrical conductivity of an anatomic structure to form based on measured boundary voltages. However, the EIT inverse problem for the image reconstruction is nonlinear and highly ill‐posed. Therefore, in this work, a simulated dataset that mimic...

Energy serves as the foundational element for all active functions within microrobots. Harvesting devices, such as photovoltaic cells and coils, play a crucial role in converting diverse forms of energy into electricity, while energy storage devices enable uninterrupted operation and liberate microrobots from dependence on external sources. Despite...

Wake-up receivers (WuRxs) allow wireless sensor nodes to run on battery power while maintaining asynchronous, low-latency communication. This article focuses on WuRxs based on low-frequency pattern matchers (LFPMs). Many recent studies either investigate physical WuRx implementations or simulate WuRx-based protocols. Our goal is to address the chal...

This paper is focused on the diagnostics of multicopter UAV propulsion system, in which the temporary transient states occur during operation in faulty conditions (eg. not all motor phases working properly). As a diagnostic sensor, the piezo strip has been used, which is very sensitive to any vibrations of the multi-rotor frame. The paper concerns...

Laser‐induced graphene (LIG) is a promising technology enabling cost‐effective, scalable, and high surface area 3D‐porous graphene electrodes for electrochemical applications. Nitrate in water bodies is a harmful contaminant to humans and the ecosystems. Its detection by electrochemical sensors is challenging due to the interference from nitrite. H...

The interaction of CO 2 laser with polyimide results in the formation of laser-induced graphene (LIG) and other morphological transitions based on laser parameters, such as Laser-induced fibers (LIF) on the surface. However, a fundamental investigation of LIF, its properties and potential have not been explored until now. We aim therefore to provid...

In this study, a multiwalled carbon nanotube (MWCNT) dispersion is used as an ink for a single-nozzle inkjet printing system to produce a planar coil that can be used to determine strain wirelessly. The MWCNT dispersion is non-covalently functionalized by dispersing the CNTs in an anionic surfactant, namely sodium dodecyl sulfate (SDS). The fabrica...

Precipitation measurements in urban areas are becoming more and more important due to the increasing number of heavy rainfall events. In order to establish a dense measurement network within a city, low-cost sensors are necessary. A low-cost inductive rain sensor was developed for this purpose. In this study, the signal processing of the sensor is...

The dopamine and uric acid are primary products of purine metabolism and they coexist in serum and the extracellular fluid of the central nervous system. Some diseases of the human body are due to abnormal levels of uric acid and dopamine. Thus, the clinical diagnosis of some diseases needs a sensitive and simultaneous analysis of uric acid and dop...

LoRa technology, renowned for its low-power, long-range capabilities in IoT applications, faces challenges in real-world scenarios, including fading channels, interference, and environmental obstacles. This paper aims to study the reliability of LoRa in Non-Line-of-Sight (NLoS) conditions and in noisy and mobile environments for Industrial IoT (IIo...