a) 2025 - 27 Documents

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Author: search.filters.author.Natarajan, Arunadevi

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    ADVANCES IN FIELD EFFECT TRANSISTOR BASED ELECTRONIC DEVICES INTEGRATED WITH CMOS TECHNOLOGY FOR BIOSENSING (Review)
    (Elsevier B.V., 2025) Rai, Harshita; Singh, Kshitij RB; Natarajan, Arunadevi; Pandey, Shyam S
    This review article embarks on an enlightening journey through the multifaceted realm of electronic devices and their applications in biosensing, emphasizing the role of Field effect transistor (FET) based biosensors and Complementary Metal Oxide Semiconductor (CMOS) processes in biosensing device development. It begins by elucidating the foundational principles of biosensing and underscoring the crucial contribution of transducers, establishing a robust understanding of the field. The article unravels the intricate interplay between electronic biosensors and CMOS processes, offering a concise yet insightful exploration of their operational intricacies, diverse practical applications, and recent advancements. Additionally, it spotlights the pivotal role of FET-based biosensors integrated with CMOS processes in miniaturizing biosensors and thus amplifying their real-world efficacy. Moreover, the role of modern technologies, such as the Internet of Things (IoT), in recent biosensor development has been discussed. By addressing inherent challenges like sensitivity, integration, cost, and accessibility, the article underscores the vital role of biosensing technologies driven by electronic devices in wearable technology development. In addition, integrating these devices to fit with the ongoing trend of VLSI technology faces significant challenges. To overcome this aspect, sensors based on molecularly imprinted polymers (MIPs) can be the best alternative, as they will avoid utilizing bioreceptors, as it simplifies integration by reducing complexity, enhancing stability, and improving compatibility with CMOS processes. Hence, this review's distinct contribution lies in its comprehensive approach, shedding light on how biosensing technologies, underpinned by electronic devices such as FETs and CMOS processes, offer solutions for realizing modern-day devices.
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    SELF-ASSEMBLED COMPLEXES: FROM MOLECULES TO BIODERIVED MATERIALS FOR SUSTAINABLE SENSING TECHNOLOGIE (Editorial)
    (Elsevier B.V., 2025-01-11) Singh, Ravindra Pratap; Pandey, Shyam S; Natarajan, Arunadevi; Singh, Jay
    This special issue is focused on the development and characterization of nanosized self-assembled molecules for various sensing applications. The scope of the issue was contented and received many research and review articles, proving that the process of synchronizing chemistry/biology/material science with novel technology will end up with substances of sensing importance. The quality of the published articles in this issue is revealed from their way of interpretation, illustrative diagrams, and scientific explanation. All the articles in this special issue will upsurge the understanding and knowledge about functional materials to budding researchers.
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    TARGETED ELIMINATION OF HEAVY METALS FROM INDUSTRIAL WASTEWATER: SYNERGISTIC EFFECT OF NANO METAL OXIDES (Article)
    (Taiwan Institute of Chemical Engineers, 2025-01) Swathika, Manoharan; Andal, Narasimhan Muthulakshmi; Dharani, Sivasubramaniam; Singh, Jay; Pandey Shyam, S; Singh Kshitij, RB; Natarajan, Arunadevi
    Unprocessed solutions containing hazardous heavy metals, even in trace amounts, exert a detrimental impact on human health and pose a threat to biodiversity, hydrosphere ecosystems, and communities. Liquid waste containing heavy metals has been found to pose a notable threat to the environment.In this study, nano NiO, MnO, and NiMnO3 were synthesized and characterized systematically. The nano metal oxides were used as an adsorbent for the elimination of heavy metals from industrial wastewater.In view of this, the efficacy of synthesized metal oxides as potential sorbents is investigated to chelate Pb (II) ions which are present as one of the major contaminants of industrial effluents. Three adsorption systems viz., Pb(II) – NiO, Pb(II) - MnO, and Pb(II) – NiMnO3 mixture were experimentally verified by Batch equilibration and fixed bed column methods. Pre and post-run sorbent materials are characterized using SEM and EDAX analyses to examine the appropriate changes. A trial fixed bed column was run for the effluent sample, wherein 98% Pb (II) removal was registered against 96 % as observed in Batch mode. This emphasizes the potential of the synthesized metal oxides as efficient sorbents for addressing heavy metal contamination in industrial wastewater.
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    SYNTHESIS AND ADVANCES OF SMART HETEROATOM-SITED COATINGS FOR ANTICORROSION APPLICATIONS (Article)
    (Taiwan Institute of Chemical Engineers, 2025-01) Swathika, M; Chandran, Sharmila; Singh Kshitij, RB; Singh, Ravindra Pratap; Pandey Shyam, S; Natarajan, Arunadevi
    Recently, there has been a significant interest in nanocomposites with porous structure, excellent thermal stability, and stiffness. The corrosion resistance behavior of epoxy resin-based Ni and Co metal oxides nanocomposite is reported here. The anti-corrosion abilities of mild steel substrates were investigated in different media like bore water, soil, and bacteria. Over 120 days, the inhibitory efficiency of the target compound was tested.The corrosion process was studied under a UV chamber at different wavelengths at 254 nm, 365 nm, and at visible region respectively. The bacterial study was carried out against the gram (+) and gram (-) on the mild steel specimen against Staphylococcus aureus and Escherichia coli. Morphological studies show the effective nanocomposite encapsulation in epoxy resin. The powder XRD method divulges the structure, and the dispersity of the epoxy layer as projected by scanning electron microscopy. Anti-corrosion properties were determined by electrochemical impedance spectroscopy (EIS) and polarization methods.The results display nano CoO has improved anti-corrosion characteristics compared to nano NiO. The metal nano coating effectively protects mild steel due to barrier properties towards ions responsible for rusting, demonstrating its appropriateness as a next-generation anti-corrosive coating for a sustainable environment.