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

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

Research Highlights

  • Small-img
    Electrochemically Patterned Transducer with…

    Neethu Kalloor Sadanandhan, Sudha Janardhanan Devaki,* Rohini Kuttiplavil Narayanan, and Molji Cheriyathuchenaaramvalli
    Electrochemically Patterned Transducer with Anisotropic PEDOT through Liquid Crystalline Template Polymerization
    We have demonstrated patterning of highly ordered nanostructured conducting PEDOT (poly(3,4-ethylenedioxythiophene)) on glassy carbon electrode (GCE) through electrochemical polymerization of a biobased liquid crystalline template of EDOT-PDPPA (3-pentadecylphenyl phosphoric acid). Self-assembled “EDOT-PDPPA” in water [...]

  • Small-img
    Syndiotactic Polystyrene/Hybrid Silica Spheres of …

    Angel Mary Joseph, Baku Nagendra, K. P. Surendran*, and E. BhojeGowd*
    Syndiotactic Polystyrene/Hybrid Silica Spheres of POSS Siloxane Composites Exhibiting Ultralow Dielectric ConstantHomogeneously dispersed hybrid silica/syndiotactic polystyrenecomposites were investigated for low-κ dielectric applications. The compositeswere prepared by a solution blending method, and their microstructures wereanalyzed by SEM, TEM, and AFM. Crystallization and phase transformationbehavior of sPS [...]

  • Small-img
    Cold Crystallization of PDMS and PLLA in Poly(L‑lactide‑b‑dimethylsiloxane‑b‑L‑lactide) Triblock Copolymer and Their Effect on Nanostructure Morphology

    S. Nagarajan and E. Bhoje Gowd
    Poly(L-lactide-b-dimethylsiloxane-b-L-lactide)(PLLA-b-PDMS-b-PLLA) triblock copolymer was synthesized by ring-opening polymerization of L-lactide using bis-(hydroxyalkyl)-terminated PDMS as a macroinitiator. The block copolymer was immiscible in the melt, and the melt morphology was preserved upon cooling the melt to −120 °C. It was also observed that at moderate cooling rates PDMS and PLLA blocks [...]

  • Small-img
    Fabrication of Epoxy Vesicles using Self-Assembling Polystyrene–Montmorillonite Nanocomposite Reusable Template

    Prasad Vadakkethonippurathu Sivankuttynair *, Asha Susan Chacko , Bindu P. Nair , Bijini T. Thulasibai , and Pavithran Chorappan
    We report the fabrication of thermoset vesicles using a thermoplastic–clay nanocomposite vesicle reusable template. Epoxy polymer vesicles (EPV) of micrometer diameters were synthesized from bisphenol-A diglycidyl ether resin encapsulated within a self-assembled, polystyrene–montmorillonite hybrid nanocomposite (PCN) template [...]

  • Small-img
    Living Supramolecular Polymerization

    R. D. Mukhopadhyay, A. Ajayaghosh
    Most polymers that we encounter, like those used in grocery bags and soda bottles, are formed from small molecules (monomers) held together by strong covalent bonds. In supramolecular polymerization, monomers bond through weaker reversible interactions, such as hydrogen bonds (H-bonds). Supramolecular polymerization usually proceeds through step-growth mechanisms, where both ends of [...]

  • Small-img
    A Slippery Molecular Assembly Allows Water as a Self-ErasableSecurity Marker

    R. Thirumalai, R. D. Mukhopadhyay, V. K. Praveen, A. Ajayaghosh
    Protection of currency and valuable documents from counterfeit continues to be a challenge. While there are many embedded security features available for document safety, they are not immune to forgery. Fluorescence is a sensitive property, which responds to external stimuli such as solvent polarity, temperature or [...]

  • Small-img
    Fluorescence imaging assisted photodynamic therapy using photosensitizer linked gold quantum clusters

    Lakshmi V. Nair, Shaiju S. Nazeer, Ramapurath S. Jayasree, and Ayyappanpillai Ajayaghosh
    Fluorescence imaging assisted photodynamic therapy (PDT) is a viable two-in-one clinical tool for cancer treatment and follow-up. While the surface plasmon effect of gold nanorods and nanoparticles has been effective for cancer therapy, their emission properties when compared to gold nanoclusters are weak for [...]

  • Small-img
    Electrostatically driven self assembly of CdTe nanoparticles with organic chromophores probed via Ham effect

    ArunGopi, AsarikalVindhyasarumi and KaruvathYoosaf*
    We demonstrate that the polarity influence on the pyrene fluorescence band ratios (I3/I1) termed as the Ham effect can be effectively utilized to study the electrostatic interaction of CdTe nanoparticles (ζ = −46 mV) with the oppositely charged organic molecule, pyrenemethylamine hydrochloride (PMAH). As compared to water, the less [...]

  • Small-img
    Polypropylene / Layered double hydroxide (LDH) nanocomposites: Influence of LDH particle size on the crystallization behavior of polypropylene

    Baku Nagendra, Kiran Mohan, and E. Bhoje Gowd*
    Highly dispersed isotactic polypropylene (iPP) nanocomposites were prepared by incorporating two different sized Mg−Al LDH nanoparticles with different loadings from 1 to 10 wt % using a modified solvent mixing method. Larger sized LDH nanoparticles (∼3−4 μm) were prepared from the gel form of Mg−Al LDH, and the [...]

  • Small-img
    p/n-Polarity of thiophene oligomers in photovoltaic cells: Role of molecular vs supramolecular properties

    TanwisthaGhosh, AneshGopal, Akinori Saeki,* Shu Seki and Vijayakumar C. Nair*
    Molecular and supramolecular properties play key roles on the optoelectronic properties and photovoltaic performances of organic materials. In this work, we show how a small change in the molecular structure affects such properties, which in turn control the intrinsic and fundamental property such as the p/n-polarity [...]

  •  Page 8 of 10  « First  ... « 6  7  8  9  10 »