Now showing 1 - 4 of 4
  • Placeholder Image
    Publication
    Nanostructured materials for energy-related applications
    (01-01-2013)
    Reddy, Arava L.M.
    ;
    Materials play a key role especially in the field of energy storage and conversion. Design of efficient and cost-effective materials for energy applications is of prime research focus. This chapter presents the recent trends in the energy-related applications of various carbon nanotubes (CNT) and their hybrid nanostructures. Development of CNT-based electrocatalysts for proton exchange membrane fuel cells and CNT-based electrodes for supercapacitors and Li-ion batteries are discussed.
  • Placeholder Image
    Publication
    Carbon nanomaterial-based sensors for diabetes diagnostics
    (21-06-2023)
    Fathima, T. K.Sana
    ;
    Ghosh, Anamika
    ;
    Carbon nanomaterials, such as carbon nanotubes, graphene, fullerene, etc., have attracted enormous attention and triggered extensive research in applications such as electrocatalysis, energy storage, sensors, and much more, owing to their unique physicochemical properties. In recent decades, many studies on carbon nanomaterial-based electrochemical sensors for various analytes have been reported. Their utilization in sensors enables better charge transfer, lower detection limits, better biocompatibility, lower overpotentials, resistance to surface fouling, and higher sensitivity. They also exhibit better selectivity towards analytes and provide a high surface area platform for incorporating enzymes. These advantages arise from the wide range of morphologies (nanotubes, nanohorns, nanofibers, etc.), dimensionalities (0D, 1D, 2D, or 3D), high aspect ratio, and tunable functionalities that these nanomaterials offer. In this chapter, various carbon nanomaterials that have been employed in sensors for diabetes diagnostics are explored. The types of carbon nanomaterials, their features, and their synthesis are briefly outlined. Further, the characteristics and mechanisms of enzymatic and non-enzymatic electrochemical and optical glucose sensors employing carbon nanomaterials are discussed. Finally, the challenges and future perspectives for these sensors are also briefly explored.
  • Placeholder Image
    Publication
    Synthesis of carbon nanotubes using novel alloy hydride catalysts by thermal cvd and their energy-related applications
    (01-01-2006) ;
    Shaijumon, Mancheri Manikoth
    This chapter presents the recent trends in the carbon nanotubes growth by chemical vapour deposition (CVD) technique. The use of CVD technique and novel alloy hydride catalysts for the synthesis of multiwalled carbon nanotubes (MWNTs) by the pyrolysis of acetylene is presented. The advantages of this novel approach to catalyst preparation using hydrogen decrepitation with reference to the increase in the catalytic reactivity and active sites for the formation of CNTs are highlightened. A growth process of CNTs with alloy hydride catalysts by vapour-liquid-solid (VLS) mechanism is proposed. The results of the different characterization of the as-grown and purified MWNTs are described. The dependence of the yield and the purity of the MWNTs synthesized on the alloy hydride catalysts are discussed. The various experimental techniques of the energy- related applications of MWNTs are presented.
  • Placeholder Image
    Publication
    Field emission study of thermally exfoliated wrinkled graphene
    (01-01-2013)
    Baby, Tessy Theres
    ;
    The two dimensional (2D) graphene is the rising star in the field of nanotechnology among scientific community because of its exceptional properties. Single layer of graphene is having peculiar properties like high electrical and thermal conductivity, good ballistic transport, chemical inertness, and so on [1, 2]. In 2004, Geim and Novoslev have successfully extracted and characterized single layer of graphene by micro mechanical cleavage [3]. After that, different techniques have been developed for small scale and large scales synthesize of single layer and few layer (2-5 layer) graphene. The different methods of synthesize of graphene include thermal exfoliation [4], hydrogen induced exfoliation of graphite oxide (GO) [5], chemical vapor deposition [6], and so on. Depending on the way in which graphene synthesis, the numbers of layers as well as properties of graphene change.