Materials Literature
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Phthalocyanines (Pcs) containing a carboxylic acid functionality directly bound to the macrocycle have been synthesized, in one step and in good yields, from iodo-substituted Pc precursors. This methodology represents a convenient alternative to the commonly used method based on two consecutive oxidations of hydroxyme…
A novel and simple method for the electrochemical modification of ordered mesoporous silica is described. A well-organized thin film of amine-functionalized ordered mesoporous silica has been deposited electrochemically on the electrode surface. The resulting amine-functionalized electrodes were then subjected to post…
We report a novel, yet simple, method for the preparation of high aspect ratio cylindrical microdomains oriented vertically on a substrate by using block copolymer micelles and temperature-programmed solvent vapor annealing. Multilayered spherical micelles were first prepared by spin-coating of polystyrene-block-poly(…
This work reports the electrochromic evaluation of WxSi yOz and WOx glad thin films deposited by reactive magnetron sputtering at glancing angle. Their electrochemical properties were assessed by the analysis of cyclic voltammetry and chronoamperometry measurements in 0.1 M HClO4, whereas their optical properties were…
We report a very simple method for the fabrication of amorphous silicon rich oxide nanowires (a-SiOx NWs) with intrinsic nanocrystalline silicon quantum dots (nC-Si QDs) with a high density and controlled size, by thermally annealing thin films of nC-Si quantum dots embedded in the a-SiOx matrix, overcoated by an ultr…
Environment hazards and risks of engineered NanoParticles (NPs) have been debated in recent years. In this paper, the effects of silver (Ag) and carbon (C) NPs were explored in sea urchin Paracentrotus lividus ( P. lividus ) development. Fertilization and development of P. lividus up to the pluteus stage were assayed…
Na and Al-doped ZnO nano-powders were prepared by the sol-gel method. The XRD results indicated that all samples revealed a wurtzite-type hexagonal crystalline structure and the grain size of Al-doped ZnO decreases with increasing Al doping. The grain size of Na-doped ZnO is about 50 nm. Photocatalytic degradation of…
An acetylacetonato derivative ligand, dibenzoylmethane (dbm), has been functionalized with a dimesitylboryl group. Phosphorescent N^C-chelate Pt(II) compounds with the new molecule as an ancillary ligand have been achieved and used as effective turn-on phosphorescent sensors for fluoride ions under air.
A simple enzyme-free spectrophotometric detection of hydrogen peroxide is demonstrated based on its colorimetric reaction with oxygen deficient cerium oxide nanoparticles (CNPs). This colorimetric sensitivity of CNPs towards H2O2 increases significantly with decreasing crystallite size due to an increase in the surfac…
Non-aqueous emulsions with a high storage stability are stabilised with organic solvent-borne crosslinked poly(N-isopropylacrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) poly(NIPAM-co-AMPS) microgels functionalised with a nonionic polymerisable surfactant (polyoxyethylene 4-nonyl-2-propyl-phenyl maleate este…
A new proton conductor, RbMg1−xH2x(PO3)3·yH2O, was synthesized by the coprecipitation method followed by sintering at 540 K. The range of solid solution for RbMg1−xH2x(PO3)3·yH2O was 0.00 < x < 0.18 and the highest conductivity of 5.5 × 10−3 S cm−1 was observed at 443 K for the composition of x = 0.11. The structure o…
Graphene has been recognized as a promising 2D material with many new properties. However, pristine graphene is gapless which hinders its direct application towards graphene-based semiconducting devices. Recently, various ways have been proposed to overcome this problem. In this study, we report a robust method to ope…
3D nanoporous Ag@BSA composite microspheres were successfully prepared through a protein-directed approach. Electrochemical measurements show that the nanoporous Ag@BSA composite microspheres exhibit excellent electrocatalytic activity towards the reduction of H2O2. A linear range of 5 μM-1.5 mM and a lower detection…
A computational investigation was carried out to understand the aggregation of nanoscale graphene with two typical pathways of stacking assembly and sliding assembly in water. The interfacial-organized monolayer water film (MWF) induced "two-step" aggregation of nanographene in both stacking and sliding assembly pathw…
The electrical properties and Raman spectroscopy of [001]-oriented pure lead-free Na0.5Bi0.5TiO3 (NBT) and manganese-doped NBT single crystals have been investigated. With the effect of Mn-doping, the remnant polarization P r has a great enhancement from 15.2 μC/cm2 to 30.0 μC/cm2, and the pyroelectric coefficient is…
The (Na0.5-xKxBi0.5-xNdx)TiO3 ferroelectric ceramics with x = 0.0125, 0.025 and 0.05 were prepared by solid state reaction route. The dielectric, ferroelectric property and X-ray photoelectron spectroscopy (XPS) studies were investigated on the prepared samples. X-ray studies indicate the formation of single phase per…
Problem statement : Developing high-value nanostructured carbon from bio-char, for electrical and natural gas energy storage, is critical to improving the economic viability of thermochemical bioenergy and biofuel conversion processes. Approach : We show chemical activation, using potassium or sodium hydroxide as cata…
A major goal/challenge in catalysis research is to design stable catalysts that selectively form targeted products in high yields. This chapter presents a brief overview of recent progress towards this goal including: (1) fundamental concepts, (2) current approaches to heterogeneous catalyst design and discovery, (3)…
Poly(glycerol adipate) PGA is synthesized by enzymatic polymerization using glycerol and either divinyl adipate or dimethyl adipate. The PGA is linear when the enzymatic reaction is carried out at 40°C while branching occurs at higher temperatures. The linear PGA backbone is modified by esterification with fatty acids…
The ever increasing potentialities of petroleum plastics with respect to lack of degradation, inability to recycle and the toxic effects of incineration, has urged to design biodegradable polymers, often called Green Plastics. These biodegradable plastics are promiscuous due to their analogous properties and environme…