CSIR – National Institute for Interdisciplinary Science and Technology (NIIST)

Council of Scientific & Industrial Research (CSIR), Govt.Of India Thiruvananthapuram.

Research Highlights

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    Formation of Coaxial Nanocables with Amplified Supramolecular Chirality through an Interaction between Carbon Nanotubes and a Chiral π-Gelator

    In an attempt to gather experimental evidence for the
    influence of carbon allotropes on supramolecular chirality, we
    found that carbon nanotubes (CNTs) facilitate amplification of
    the molecular chirality of a p-gelator (MC-OPV) to supramolecular
    helicity at a concentration much lower than that
    required for intermolecular interaction. For example, at
    a concentration 1.8×10¢4m, MC-OPV did not exhibit a CD
    signal; however, the addition [...]

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    A π-gel scaffold for assembling fullerene to photoconducting supramolecular rods

    Nonequilibrium self-assembly of molecules holds a huge prospect as a tool for obtaining new-generation materials for future applications. Crystallization of neutral molecules within a supramolecular gel matrix is one example in which two nonequilibrium processes occur orthogonal to each other. On the other hand, electronically interacting donor-acceptor two-component systems are expected to form phase-miscible hybrid [...]

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    Tweaking the Organization of Liquid Crystallinity and Molecular Gelation in Cholesterol Tagged Cardanol by Self-Assembly

    Neethu K. Sadanandhan, Sarojam Sivakala, and Sudha J. Devaki*
    This paper describes the effect of unsaturation, solvent, concentration
    and temperature on the specific modes of packing
    and the formation of supramolecular architectures in cholesterol
    tagged cardanol, 3-pentadecyl phenol. Influences were investigated
    using various microscopic techniques, UV-Vis spectroscopy,
    emission spectroscopy, Circular Dichroism (CD)
    spectroscopy, X-Ray Diffraction (XRD) and rheometry. Results
    revealed that the driving [...]

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    High Performing Biobased Ionic Liquid Crystal Electrolytes for Supercapacitors

    Renjith Sasi, Sujatha Sarojam,and Sudha J. Devaki*
    Production and storage of energy in a highly efficient and
    environmentally sustainable way is a demand of the current century to
    meet the growing global energy requirement. Design and development
    of novel materials and processes that allow precise control over the
    electrochemical behavior and conductivity of electrolytes is necessary for
    acquiring such targets. Development [...]

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    Real time monitoring of aminothiol level in blood using a near-infrared dye assisted deep tissue fluorescence and photoacoustic bimodal imaging

    The development of molecular probes for the detection and imaging of biological thiols is a major step forward diagnosing various types of diseases. Previously reported thiol imaging strategies were mainly based on a single mode of imaging with a limited application in vivo. In this work, we introduced an unsymmetrical near-infrared (NIR) squaraine dye (USq) [...]

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    A Three-Photon Active Organic Fluorophore for Deep Tissue Ratiometric Imaging of Intracellular Divalent Zinc

    Deep tissue bioimaging with three-photon (3P) excitation using near-infrared (NIR) light in the second IR window (1.0–1.4 μm) could provide high resolution images with an improved signal-to-noise ratio. Herein, we report a photostable and nontoxic 3P excitable donor-π-acceptor system (GMP) having 3P cross-section (σ3) of 1.78×10−80 cm6 s2 photon−2 and action cross-section (σ3η3) of 2.31×10−81 cm6 s2 photon−2, which [...]

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    Supercoiled Fibres of Self Sorted DonorAcceptor Stacks: A Turn-Off/Turn-On Platform for Sensing Volatile Aromatic Compounds

    To ensure the comfortable survival of living organisms, detection of different life threatening volatile organic compounds (VOCs) such as biological metabolites and carcinogenic molecules is of prime importance. Herein, we report the use of supercoiled supramolecular polymeric fibres of self-sorted donor–acceptor molecules as “turn-off/turn-on” fluorescent sensors for the detection of carcinogenic VOCs. For this purpose, [...]

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    Self-assembled Hybrid Polyvinylcarbazole…

    A. Aashish, R. Ramakrishnan, J. D. Sudha*,M. Sankaran, Krishnapriya
    Self-assembled Hybrid Polyvinylcarbazole-Titania Nanotubes as an Efficient Photoanode for Solar Energy Harvesting
    This paper presents a novel photoanode system of self-assembled hybrid Polyvinylcarbazole (PVK)-titania nanocomposites (PVTs) using template guided polymerization in a mixed phase of rutile – anatase titania nanotubes. Mixed crystalline phase of titania was prepared by [...]

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    Facile strategy for the fabrication of efficient nonvolatile…

    Rajaraman Ramakrishnan, K. B. Jinesh, Sudha J. Devaki*, and Manoj Raama Varma
    Facile strategy for the fabrication of efficient nonvolatile bistable memory devices based on polyvinylcarbazole-zinc oxide
    This paper describes the development of polyvinyl carbazole- ZnO hybrid nanocomposites (PVZ) comprising electron donor carbazole moiety (p-type) and electron acceptor zinc oxide (n-type) by a facile strategy and demonstrated [...]

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    C3N4- ZnS Composite Interfaces as Heterojunctions…

    P. Suyana, Sneha K. R., Balagopal N. Nair, Venugopal Karunakaran, A. Peer Mohamed, K. G. K. Warrier and U. S. Hareesh

    C3N4- ZnS Composite Interfaces as Heterojunctions for Sun Light Induced Multifunctional Photocatalytic Applications
    Herein, we report a facile one pot synthetic protocol for the creation of C3N4–ZnS composite interfaces by the co-pyrolysis of a precursor mix [...]

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