Conference Papers

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    Studies on mechanical properties of porous anodic alumina membranes using microindentation test
    (American Institute of Physics Inc. subs@aip.org, 2015) Reddy, P.R.; Udayashankar, N.K.; Ajith, K.M.
    Porous anodic alumina (PAA) membranes were prepared using two-step self-organized anodization process carried out in 0.3 M oxalic acid at the temperature of about 5 o C. PAA membranes fabricated underconstant potential of 40 V gave optimum ordering of hexagonal pores. Microhardness of the prepared PAA membranes were studied using Vickers hardness test rig. It was observed that microhardness of prepared PAA membraneswere 2.20 GPa and 0.21 GPa for 100 g and1000 g loads respectively. © 2015 AIP Publishing LLC.
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    Uniaxial stress induced band structure changes in h-SiB
    (American Institute of Physics Inc. subs@aip.org, 2018) Manju, M.S.; Ajith, K.M.; Valsakumar, M.C.
    Uniaxial stress was applied along zigzag and armchair directions in compressive and tensile regime to see if there is any metal-semiconductor transition in SiB. Metallicity increased with increasing stress both in compression and tension in zigzag and armchair directions instead of a metal-semiconductor transition. SiB maintained energetical stability in the whole range of applied stress. © 2018 Author(s).
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    Structural and optical analysis of silver nanoparticles grown on porous anodic alumina membranes by electro-less deposition
    (Elsevier Ltd, 2019) Ramana Reddy, P.; Ajith, K.M.; Udayashankar, N.K.
    In this paper, we report our studies on silver nanoparticles which were synthesized inside the pores of porous anodic alumina (PAA) membranes by electro-less deposition method. The morphology of silver (Ag) nanoparticles was studied using FE-SEM. The result of FE-SEM showed that the Ag nanoparticles were spherical in shape and spread in uniform manner throughout the membrane. The elemental composition of Ag nanoparticles was investigated by Energy dispersive X-ray (EDX) spectroscopy. Structural characterization using X-ray diffraction pattern showed that PAA was amorphous and silver nanoparticles on PAA were crystalline in nature. Absorbance and luminescent behaviour of PAA and Ag-PAA were studied using UV-Visible and Photoluminescence (PL) spectra. PL spectra results revealed the presence of a strong peak at 392 nm in blue region, confirming the fact that the silver nanoparticles were embedded in the alumina template. © 2019 Elsevier Ltd.
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    Criticality of charged ads black hole with a global monopole
    (Springer Science and Business Media Deutschland GmbH info@springer-sbm.com, 2020) Naveena Kumar, A.; Ahmed Rizwan, C.L.A.; Ajith, K.M.
    We discuss the phase transition of charged AdS black hole surrounded by a global monopole. The cosmological constant is taken as fluid pressure and the corresponding conjugate variable as volume. In this extended phase space, the criticality is investigated from P-V isotherms, Gibbs free energy behavior and coexistence curves. The critical behavior of the Black Hole is analogous to classical van der Waals gas. This is further verified by looking at the critical exponents. The magnetic monopole parameter affects the phase structure of the black hole significantly. © Springer Nature Singapore Pte Ltd 2020.
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    The Role of Global Monopole in Joule–Thomson Effect of AdS Black Hole
    (Springer Science and Business Media Deutschland GmbH, 2021) Naveena Kumara, A.; Ahmed Rizwan, C.L.; Ajith, K.M.
    We study the throttling process of the AdS black hole with a global monopole in the extended phase space. In the approach followed, the cosmological constant and the black hole mass are identified with the thermodynamic pressure and enthalpy, respectively. We investigate the dependency of the inversion temperature and isenthalpic curves on the global monopole parameter η. Our study shows a close resemblance between the phase transition of the black hole in the extended phase space and Van der Waals fluid. The presence of global monopole plays an important role in the throttling process. © 2021, Springer Nature Singapore Pte Ltd.
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    Structure of Protein Interaction Network Associated With Alzheimer’s Disease Using Graphlet Based Techniques
    (Springer Science and Business Media B.V., 2022) Khasim, A.; Subramanian, V.; Ajith, K.M.; Shajahan, T.K.
    The crucial step in analyzing a real-world network is to choose an acceptable network model. We try to select an appropriate network model for the protein-protein interaction (PPI) network of Alzheimer’s disease (AD) using Graphlet-based metrics. The Relative Graphlet Frequency (RGF) count in the AD-PPI network is similar to that of the corresponding Scale-Free network. However, based on Graphlet Degree Distribution (GDD), the AD-PPI network has a good match with Geometric random graphs. The graphlet correlation statistics of the AD network show that it has a core-periphery topology. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.