1. System and method for continuous wave low power laser based synthesis of metal nano particles : patent certificate IN 512589, 2024-02-20Sankaranarayana Iyer Sankararaman, Mohanachandran Nair Sindhu Swapna, Abdul Rahim Sajeela Beevi Ashik, Ramachandran Nair Amba Devi Krishnanunni, Vadakkedathu Parameswaran Narayanan Nampoori, 2024, patent Opis: This disclosure relates to synthesis of metal nanoparticles (NPs). In particular, the invention relates to methods of synthesizing metal nanoparticles using Laser. The invention relates to Laser assisted synthesis of metal nanoparticles using continuous wave low laser power in a liquid medium. The system [100] for synthesis of metal nanoparticles, comprises of a laser source [101], a mechanical chopper [102], a lens [103], a target metal [104], a liquid medium [106] and a heat source [107]. Additionally the invention relates to laser assisted synthesis of metal nanoparticles with silver as the metal target and water as the liquid medium. The NPs produced are characterized by UV-Visible spectrophotometer, Field-emission Scanning Electron Microscope (FESEM), Energy Dispersive X-Ray Spectroscopy (EDS), and Transmission Electron Microscopy (TEM).Figure 1. Ključne besede: cw laser, nanoparticle, method Objavljeno v RUNG: 26.02.2024; Ogledov: 261; Prenosov: 1 Povezava na datoteko Gradivo ima več datotek! Več... |
2. Towards greener packaging : tapioca starch-based biocomposites with Siam weed extract and flax seed gel as sustainable antibacterial packaging materialMohanachandran Nair Sindhu Swapna, Abin Oscar, Dorota Korte, Sankaranarayana Iyer Sankararaman, 2024, izvirni znanstveni članek Ključne besede: biocomposite, tapioca, flax seed, Siam weed, sustainability Objavljeno v RUNG: 16.02.2024; Ogledov: 345; Prenosov: 5 Celotno besedilo (4,24 MB) Gradivo ima več datotek! Več... |
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9. 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, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: iron, Chelex resin, diffusive gradients, thin films, beam deflection spectrometry Objavljeno v RUNG: 09.01.2024; Ogledov: 374; Prenosov: 2 Povezava na datoteko Gradivo ima več datotek! Več... |
10. Eco-conscious nanofluids : exploring heat transfer performance with graphitic carbon nitride nanoparticlesVijayakumar Gokul, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, 2023, izvirni znanstveni članek Opis: 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. Ključne besede: thermal lens, nanofluids Objavljeno v RUNG: 05.01.2024; Ogledov: 438; Prenosov: 4 Povezava na datoteko Gradivo ima več datotek! Več... |