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    Applications of Nanocellulose in Drug Release
    (World Scientific Publ Co Pte Ltd, 2025) Usan, Huseyin; Kariper, S. Esra Bolsu; Kariper, I. Afsin
    In this study, it is examined how nanocellulose has been used in drug release so far. In the thinning, information is given briefly on controlled drug release and its importance, nanomaterials in controlled release, structure, and production of nanocellulose. Then, examples of the use of nanocellulose in drug release are given. The disadvantage of still having a slightly high production cost has been identified. However, it is understood that it is a very suitable material for drug release due to its abundance in nature, easy availability, and biocompatibility. Therefore, at the end of the study, it is recommended that nanocellulose of different sizes would be very useful for producing nanocellulose in different sizes and its applications in drug release and nanocellulose with other functional groups for drug release. In this respect, it is predicted that studies on nanocellulose as a natural product in terms of drug release will accelerate.
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    Bubble energy nanogenerators
    (Springer, 2025) Kariper, S. Esra Bolsu; Kariper, Ishak Afsin; Serdaroglu, Goncagul
    Demands for sustainable and efficient energy solutions are increasing globally every day. This has led to significant advances in nanotechnology-based energy harvesting. Bubble Energy Nanogenerators (BuNGs) are one of the latest emerging technologies to convert the kinetic and potential energy of air bubbles in water into electrical energy. This review is based on a comprehensive review of theoretical principles, instability mechanisms, and recent technological developments in bubble-based nanogenerators, with a particular focus on triboelectric nanogenerators (TENGs), piezoelectric nanogenerators (PENGs) and hybrid nanogenerators. The article aims to critically evaluate bubble dynamics and stability by combining fundamental instability models, including Ledinegg, Taylor, and Henry instability theories, to improve the understanding of bubble-induced energy conversion. Additionally, advances in nanomaterial integration, such as using surface-modified electrodes, surface coatings, and hydrophobic nanostructures to optimize energy efficiency, are discussed. According to the literature, it is understood that BuNG designs can achieve high voltage outputs with large bubble sizes, but there are difficulties in controlling energy dissipation, unstable bubble behavior, and charge transfer efficiency. New approaches, pressure-induced bubble collapse, charge separation mechanisms, and modified surfaces for improved performance have been presented as solutions. This work is intended to bridge the gap between fundamental bubble physics and applied nanotechnology and draw a clear roadmap for future research on self-powered energy systems, underwater sensing, and renewable energy harvesting applications.
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    Hydrovoltaic energy
    (Elsevier Science Sa, 2024) Kariper, S. Esra Bolsu; Kariper, I. Afsin
    Researchers focused on searching for low-cost, eco-friendly, renewable, high-performance materials for energy generation to handle the increase in production costs, decrease in natural resources, and adverse effects of raw materials and intermediate and final products on the environment. Nanotechnology allowed the development of new technologies to protect the environment, meet energy needs, achieve the desired efficiency, and address the lack of resources and waste problems. Renewable energy generation has focused on producing electrical energy from water, the most abundant matter in the world. The hydrovoltaic effect allows the development of low-cost and high-efficiency systems that can directly convert thermal energy into electrical energy through the interaction of water with nanomaterials such as carbon nanotubes, carbon nanoparticles, conductive polymers, and graphene. This study reviews the development of hydrovoltaic energy by discussing the nanomaterials used to create this energy, the performance of the devices, the effect of material properties on device efficiency, and recent developments. Nanostructured carbon materials increase water evaporation significantly, achieving continuous electricity generation. Studies on developing self-running systems using nanostructured materials are continuing. However, researchers should also concentrate on increasing the electrical output of the devices to increase hydrovoltaic energy usage.
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    Pectin Supercapacitor Applications
    (World Scientific Publ Co Pte Ltd, 2024) Usan, Huseyin; Kariper, S. Esra Bolsu; Kariper, I. Afsin; Koc, Dilek Imren
    In today's energy wars, the decrease in fossil fuels and the increase in pollution reuses the question of energy and clean merit production. For this reason, supercapacitor electrodes are available for supercapacitor applications, which are synthesized using biodegradable materials or hybrids by taking nature as an example. In synthesizing our example electrode pectin, we will examine the methods of obtaining pectin, which is abundant in nature and can be used effectively in terms of its physicochemical properties, by purification or synthesis methods. Supercapacitors are essential in storing energy with their fast charge/discharge properties. This includes using pectin and other materials in energy storage systems. We will present other materials preferred in supercapacitor applications and modified compilations of these applications. In conclusion; a porous material such as pectin has a large surface area. Materials with large surface areas are very suitable electrodes for charge storage in supercapacitor applications. If some problems in pectin production and electrical conductivity can be resolved, it will be a very suitable natural electrode material for supercapacitors.