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24. Where is iron? : depth binding profiles in Chelex resin hydrogels using diffusive gradients in thin films - beam deflection spectrometry methodDorota Korte, Hanna Budasheva, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, Arne Bratkič, 2023, published scientific conference contribution abstract Keywords: iron, Chelex resin, diffusive gradients, thin films, beam deflection spectrometry
Published in RUNG: 09.01.2024; Views: 1550; Downloads: 3
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25. Eco-conscious nanofluids : exploring heat transfer performance with graphitic carbon nitride nanoparticlesVijayakumar Gokul, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, 2023, original scientific article Abstract: Abstract
The work explores the heat transfer capabilities of semiconducting graphitic carbon nitride (g-C3N4) nanofluids. Also, it presents a sustainable and eco-friendly method for synthesizing g-C3N4 nanoparticles using commercially available rice flour as a natural carbon precursor through hydrothermal treatment. The synthesized sample subjected to various characterizations, including analysis of their structure, morphology, thermal properties, and optical properties. The optical bandgap (2.66 eV) is deduced through Tauc plot analysis and reveals the semiconducting nature of the sample. The formation of g-C3N4 is confirmed by various spectroscopic techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), and Raman spectroscopy. Thermogravimetric analysis (TGA) demonstrates the nanoparticles’ excellent thermal stability up to 550 °C, indicating potential applications in heat transfer fluids. The investigation of concentration-dependent thermal diffusivity variation using the sensitive mode mismatched dual beam thermal lens technique highlights the potential of g-C3N4 semiconductor nanofluid as an organic and metal-free additive in industry-demanding coolant applications.
Keywords: thermal lens, nanofluids
Published in RUNG: 05.01.2024; Views: 1842; Downloads: 6
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28. Time series and mel frequency analyses of wet and dry cough signals : a neural net classificationAmmini Renjini, Mohanachandran Nair Sindhu Swapna, K. Satheesh Kumar, Sankaranarayana Iyer Sankararaman, 2023, original scientific article Keywords: time series, mel frequency, cough signal, wet cough, dry cough, phase portrait, mel coefficients, fractal dimension, neural network
Published in RUNG: 29.09.2023; Views: 1788; Downloads: 6
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30. Tailoring the thermal diffusivity of polyvinylidene fluoride via carbon source integration : a photothermal beam deflection studyMohanachandran Nair Sindhu Swapna, Dorota Korte, Sankaranarayana Iyer Sankararaman, 2023, original scientific article Keywords: cellulose, camphor soot, lignin, PVDF, photothermal techniques, beam deflection, hydroxyl groups
Published in RUNG: 21.08.2023; Views: 1947; Downloads: 19
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