Publications by authors named "Tuhin Kumar Maji"

Article Synopsis
  • The study explores the electronic and optical enhancements in a hybrid combination of one-dimensional tellurene and two-dimensional graphene and MoS, focusing on their structural configurations.
  • It identifies three types of heterojunctions formed in this assembly (type I, type II, and Z-scheme), which alter the electronic properties, particularly with the opening of a band gap in graphene.
  • The research suggests potential applications in broadband photodetection and green-energy harvesting, covering a wide spectrum range from 380 nm to 10,000 nm.
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This study explores a combined electrochemical and spectroscopic approach to investigate the degradation of bilirubin, a molecular marker of jaundice in humans using a biocompatible nanohybrid (citrate-functionalized Mn O nanohybrid; C-Mn O NH). The approach is aimed at the development of a facile theranostic tool for treatment, detection, and prognosis of jaundice. Linear sweep voltammetry (LSV) studies on bilirubin, C-Mn O NH, a model carrier protein, and its complex with bilirubin reveal the efficacy of the nanohybrid for both degradation and detection of bilirubin.

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Article Synopsis
  • The study reports a novel finding of anisotropic optical response in graphene oxide-gold nanohybrids, which show significantly higher nonlinear optical absorption compared to standard graphene oxide.
  • The measurements indicate a high degree of anisotropy in the nanohybrids, with values reaching approximately 28 cm/GW, which is much greater than the control GO value of 2 cm/GW.
  • The findings suggest new possibilities for developing advanced nonlinear optical systems, like tunable optical limiters and devices for processing optical data.
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The properties of nanomaterials generated by external stimuli are considered an innovative and promising replacement for the annihilation of bacterial infectious diseases. The present study demonstrates the possibility of getting the antibiotic-like drug action from our newly synthesized nanohybrid (NH), which consists of norfloxacin (NF) as the photosensitive material covalently attached to the ZnO nanoparticle (NP). The synthesized NH has been characterized using various microscopic and spectroscopic techniques.

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Weyl semimetal TaAs, congenially accommodating the massless Weyl fermions, furnishes a platform to observe a spontaneous breaking of either the time-reversal or the inversion symmetry and the concurrent genesis of pairs of Weyl nodes with significant topological durability. Former experimental analysis, which reveals that the near-zero spin-polarization of bulk TaAs, experiences a boost in proximity of point-contacts of non-magnetic metals along with the associated tip-induced superconductivity, provides the impetus to study the large-area stacked interfaces of TaAs with noble metals like Au and Ag. The primary outcomes of the present work can be listed as follows: (1) First-principles calculations on the interfacial systems have manifested an increment of the interface-induced spin-polarization and contact-induced transport spin-polarization of TaAs in proximity of noble metals; (2) In contrast to the single interface, for vertically stacked cases, the broken inversion symmetry of the system introduces a z-directional band-dispersion, resulting in an energetically separated series of non-degenerate band crossings.

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The interface of transition-metal dichalcogenides (TMDCs) and high- dielectric transition-metal oxides (TMOs) had triggered umpteen discourses because of the indubitable impact of TMOs in reducing the contact resistances and restraining the Fermi-level pinning for the metal-TMDC contacts. In the present work, we focus on the unresolved tumults of large-area TMDC/TMO interfaces, grown by adopting different techniques. Here, on a pulsed laser-deposited MoS thin film, a layer of TiO is grown by atomic layer deposition (ALD) and pulsed laser deposition (PLD).

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A higher superconducting critical temperature and large-area epsilon-near-zero systems are two long-standing goals of the scientific community, having an explicit relationship with the correlated electrons in localized orbitals. Motivated by the recent experimental findings of the strongly correlated phenomena in nanostructures of simple Drude metallic systems, we have theoretically investigated some potential bimetallic FCC combinations having close resemblance with the experimental systems. The explored systems include the large-area interface to the embedded and doped two-dimensional (2D) combinatorial nanostructures.

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Article Synopsis
  • Metal exchange techniques are being used to modify metal organic complexes, focusing on toxic metal removal.
  • The study examines the exchange of toxic mercury ions from curcumin (a food additive) with the less toxic copper ions, confirmed through advanced fluorescence methods.
  • The research provides insights into a potential strategy for purifying food additives contaminated with harmful metals, supported by theoretical findings from density functional theory (DFT).
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Organic-inorganic nanohybrids are becoming popular for their potential biological applications, including diagnosis and treatment of cancerous cells. The motive of this study is to synthesise a nanohybrid for the diagnosis and therapy of colorectal cancer. Here we have developed a facile and cost-effective synthesis of folic acid (FA) templated FeO nanoparticles with excellent colloidal stability in water using a hydrothermal method for the theranostics applications.

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The immense pharmacological relevance of the herbal medicine curcumin including anti-cancer and anti-Alzheimer effects, suggests it to be a superior alternative to synthesised drugs. The diverse functionalities with minimal side effects intensify the use of curcumin not only as a dietary supplement but also as a therapeutic agent. Besides all this effectiveness, some recent literature reported the presence of deleterious heavy metal contaminants from various sources in curcumin leading to potential health hazards.

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Bismuth containing nanomaterials recently received increasing attention with respect to environmental applications because of their low cost, high stability and nontoxicity. In this work, Bi-BiOCO heterojunctions were fabricated by in-situ decoration of Bi nanoparticles on BiOCO nanosheets a simple hydrothermal synthesis approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to confirm the morphology of the nanosheet-like heterostructure of the Bi-BiOCO composite.

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