Browsing by Author "Abhishek Madheshiya"

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Formation of multifunctional ZrO2–MgO-hBN nanocomposite for enhanced bone regeneration and E coli bacteria filtration applications
(Elsevier Ltd, 2020) Ajaz Hussain; Chandkiram Gautam; Asif Jafri; Vijay Kumar Mishra; Abhishek Madheshiya; Amarendra Gautam; Manvandra Kumar Singh; Rakesh Kumar Gautam; Manisha Gupta; Md Arshad; Robert Vajtai; Pulickel M. Ajayan
Due to adequate properties, bone implant materials have attracted much attention to repair the large-sized bone fractures which cannot be auto-healed. Recently, three-dimensional (3-D) nanocomposites were synthesized using two-dimensional (2-D) materials which reveals unexpected performances. In the present study, 3-D mesoporous biocomposites were developed for bone/dental implant applications. A ternary novel biocomposite system ZrO2–MgO-hBN was fabricated with low density, high strength, and mesoporous interconnected architecture using conventional bottom-up synthesis method. Due to remarkable stability in different fluids such as water, minimum essential medium eagle-alpha modification (α-MEM), acids and oils, the fabricated biocomposites displayed multifunctional activities along with suitable proliferation of osteoblast like MG63 cell and filtration of Escherichia coli (E-coli) bacteria from the water. Moreover, the biocomposite exhibited protective nature from harmful ultraviolet (UV) radiation. A new phase of hexagonal boron nitride (h-BN) in the form of highly porous nanotubes was observed that opens the new possibility to optimize the synthesis of porous h-BN nanotubes to explore their further applications. Therefore, based on mechanical, tribological and biological performances, the nanocomposite is a biomimetic material having potential as bone/dental implant and can be used for multifunctional applications. © 2020 Elsevier Ltd and Techna Group S.r.l.
Synthesis, physical, optical and structural properties of SrTiO3 borosilicate glasses with addition of CrO3
(Springer, 2023) Abhishek Madheshiya; Anod Kumar Singh; Shweta; Rajat Kumar Mishra; Krishna Kishor Dey; Manasi Ghosh; Kamal K Srivastava; Prerna Garg; Chandkiram Gautam
Herein, we reported physical, optical and NMR characteristics of SrTiO3-based borosilicate glasses-doped chromium trioxide, CrO3 (1–7 mol%). Five glass samples (GS) were fabricated from the glassy system 60[Sr·TiO3]–40[2SiO2·B2O3] via a rapid melt-quench technique. X-ray diffraction analysis revealed the unstructured behaviour of the glasses. Numerous physical parameters were calculated and explained in detail. Urbach energy (EU) and skin depth (δ) were studied to approve the disordered structure of glasses. Recorded infrared spectra of glasses were utilized to clarify the stretching mode of vibrations between the atoms, which correlated with their structural features and compositional variations. The energy bandgap (Eg) was estimated by employing a Davis and Mott relationship that comprises an absorption coefficient, α, as well as photon energy, hυ. Further, nuclear magnetic resonance (solid-state) spectra of the glasses were recorded and their analysis showed that the silicate and borate networks became highly polymerized with decreasing concentration of SrTiO3. © 2023, Indian Academy of Sciences.