Research Highlights

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    Shape controlled synthesis of multi-branched gold nanocrystals through a facile one-pot bifunctional biomolecular approach

    M. Sajitha, A. Vindhyasarumi, A. Gopi, and K. Yoosaf * Anisotropic nanocrsytals of gold and silver are promising candidates for sensing and therapeutic applications because of their high extinction coefficient, increased NIR response and localization of hot spots at their tips. Herein, we report a viable room temperature synthetic strategy to prepare multi-branched gold nanocrystals […]

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    Light Driven Mesoscale Assembly of a Coordination Polymeric Gelator into Flowers and Stars with Distinct Properties

    R. D. Mukhopadhyay, V. K. Praveen, A. Hazra, T. K. Maji and A. Ajayaghosh* Control over the self-assembly process of porous organic–inorganic hybrids often leads to unprecedented polymorphism and properties. Herein we demonstrate how light can be a powerful tool to intervene in the kinetically controlled mesoscale self-assembly of a coordination polymeric gelator. Ultraviolet light […]

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    Pyridyl-Amides as a Multimode Self-assembly Driver for the Design of a Stimuli Responsive π-Gelator

    K. K. Kartha, V. K. Praveen, S. S. Babu, S. Cherumukkil and A. Ajayaghosh* An oligo(p-phenylenevinylene) (OPV) derivative connected to pyridyl end groups through an amide linkage (OPV-Py) resulted in a multistimuli-responsive pi-gelator. When compared to the corresponding OPV -gelator terminated by a phenyl-amide (OPV-Ph), the aggregation properties of OPV-Py were found to be significantly […]

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    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” […]

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    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 […]

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    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 […]

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    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) […]

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    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 […]

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    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 […]

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    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 […]

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