Materials Literature
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Two new furan and benzochalcogenodiazole based monomers, namely 4,7-di(furan-2-yl)benzo[c][1,2,5]selenadiazole (FSeF) and 4,7-di(furan-2-yl)benzo[c][1,2,5]thiadiazole (FSF), were designed and synthesized via a donor–acceptor–donor approach. The monomers were electrochemically polymerized via potentiodynamic or potenti…
RuO2/MnO2 NRs as an electrode for supercapacitors show a high electrochemical performance with a specific capacitance of 793 F g−1 (based on MnO2) by cyclic voltammetry (CV) at a scan rate of 2 mV s−1 in 1 M Na2SO4 aqueous solution. A good rate capability with a specific capacitance of 556 F g−1 at a current density o…
A facile method to synthesize flower-like gold nanostructures showing multiple tips with dendritic structures is developed through a one-step reduction of HAuCl4 with dopamine at room temperature. The gold nanoflowers clearly increase the surface enhanced Raman scattering (SERS) effect, demonstrate promising biocompat…
We present a conceptual approach to low bandgap copolymers, in which we clarify the physical parameters which control the optical bandgap, develop a fundamental understanding of bandgap tuning, unify the terminology, and outline the minimum requirements for accurate prediction of polymer bandgaps from those of finite…
A new nanoreactor-type composite catalyst with Au NPs embedded into the inner wall of the mesoporous TiO2 hollow spheres resulted in an enhanced synergistic effect and superb thermal stability of highly dispersed Au NPs.
The presence of Escherichia coli (E. coli) in food and drinking water is a chronic problem worldwide. Protecting food against bacterial contamination and rapid diagnosis of infection require simple and rapid assays for detection of bacterial pathogens, including E. coli O157:H7. Here we report a rapid and novel colori…
We study the blueshift of the surface plasmon (SP) resonance energy of isolated Ag nanoparticles with decreasing particle diameter, which we recently measured using electron energy loss spectroscopy (EELS) [1]. As the particle diameter decreases from 26 down to 3.5 nm, a large blueshift of 0.5 eV of the SP resonance e…
The nucleation and growth of nascent Cu(0) nanoparticles formed by disproportionation during SET-LRP on the surface of Cu(0) wire was demonstrated by Scanning Electron Microscopy analysis of the surface of Cu(0) wire before and after disproportionation and polymerization. The dynamics of nascent Cu(0) formation, activ…
The performance of supercapacitor electrodes is determined largely by their components and structure. Graphene has revealed the intriguing potential in developing high performance electrodes. To optimize the electrochemical properties, hierarchically structured graphene networks have been utilized to prepare the elect…
A series of acid-cleavable ABA-type triblock copolymers, namely poly(ε-caprolactone)-acetal-poly(ethylene glycol)-acetal-poly(ε-caprolactone) (PCL-a-PEG-a-PCL), were synthesized via a combination of ring-opening polymerization (ROP) of ε-caprolactone initiated by propargyl alcohol and subsequent “CuAAC” click reaction…
By utilizing different coordination properties of a lanthanide ion and a transition metal ion, a heterometallo-supramolecular polymer with Eu(III) and Fe(II) ions introduced alternately (polyEuFe) was precisely prepared via stepwise complexation of the metal ions to a new unsymmetrical ligand with both a dicarboxylate…
Rare-earth (RE) fluoride upconversion nanoparticles (UCNPs), when excited by lower-energy photon radiation, exhibit a unique narrow higher energy output emission. This unique luminescent property makes the UCNPs promising bioimaging probes with fascinating features, including low autofluorescence, less scattering and…
meso-Alkynylated ferrocenyl BODIPYs (3-6) with varying conjugation length have been designed, and synthesized using the palladium catalyzed Sonogashira cross-coupling reaction of meso-chloro BODIPY with the corresponding ferrocenylethynes. These BODIPYs have been designed to improve the electronic communication betwee…
A three dimensional porous carbon nanomembrane (CNM), silica-supported CNM (SS-CNM), is developed by formation of a self-assembled monolayer of an enediyne compound on the surface of mesoporous silica (SBA-15) followed by Bergman cyclization and carbonization. The SS-CNM is applied as a conductive support for the elec…
A new, healable, supramolecular nanocomposite material has been developed and evaluated. The material comprises a blend of three components: a pyrene-functionalized polyamide, a polydiimide and pyrene-functionalized gold nanoparticles (P-AuNPs). The polymeric components interact by forming well-defined π–π stacked com…
Five inorganic–organic hybrid compounds, namely, [Cu6Na2(Htrb)4(Mo6O19)(MoO4)6] (1), [Zn3(Htrb)(Mo10O34)]·8H2O (2), [Zn2(Htrb)(β-Mo8O26)(H2O)2]·6H2O (3), [Co2(Htrb)(β-Mo8O26)(H2O)2]·6H2O (4), and [Co2(Htrb)(γ-Mo8O26)(H2O)6]·8H2O (5), have been synthesized under hydrothermal conditions, where Htrb = hexakis(1,2,4-triaz…
Efficient delivery systems should be stable in blood circulation, with efficient cellular uptake and rapid drug release in cancer cells. Herein, we synthesized P(2-(methacryloyloxy)-ethyl phosphorylcholine)-b-P(2-methoxy-2-oxoethyl methacrylate) via atom transfer radical polymerization. Doxorubicin (DOX) was linked to…
Naphthalenediimide appended peptide based self-assembly was studied. Interestingly, an aggregation induced drastic change in the fluorescence property and gel formation were observed depending on the solvent composition (chloroform : methylcyclohexane) at a fixed concentration of 1.6 mM at room temperature.
Thermal boundary resistance (inverse of conductance) between different material layers can dominate the overall thermal resistance in nanostructures and therefore impact the performance of the thermal property limiting nano devices. Because relationships between material properties and thermal boundary conductance hav…
Agricultural residue derived cellulose and cotton cellulose were used to synthesize quasi-spherical nanoparticles of 6-carboxycellulose having diameter 25-35 nm. This provides a new range of functionalized nanostructured celluloses with increased versatility and applications. The nanoparticles were efficient in stabil…