Multilayer assemblies of uniform ultrathin film electrodes with good electrical conductivity and very large surface areas were prepared for use as electrochemical capacitors. A layer-by-layer self-assembly approach was employed in an effort to improve the processability highly conducting polyaniline (PANi) chemically modified graphene. The properties multilayer (MF-) electrodes, including sheet resistance, volumetric capacitance, charge/discharge ratio, determined by morphological...

This article describes the effect of lateral size graphene oxide (GO) on humidity sensing properties a GO-based sensor.

Abstract Although the power conversion efficiency (PCE) of inorganic perovskite‐based solar cells (PSCs) is considerably less than that organic‐inorganic hybrid PSCs due to their wider bandgap, perovskites are great candidates for front cell in tandem devices. Herein, low‐temperature solution‐processed two‐terminal devices based on spectrally matched perovskite and organic bulk heterojunction (BHJ) demonstrated. By matching optical properties back using CsPbI 2 Br PTB7‐Th:IEICO‐4F BHJ as...

Conductivity enhancement of PEDOT:PSS thin films by hydroiodic acid treatment and their application in organic solar cells.

An efficient, four-component, one-pot condensation reaction of phthalimide or phthalic anhydride, aromatic aldehydes, and ethyl cyanoacetate for the synthesis 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives mediated by L-proline in excellent yields is reported.

The best model nitrile sensitizer is4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM, Fig. 2), which bears both strong electron-withdrawing nitriles and an electron-donating dimethylaminogroup. dipolar structure of DCM provides directionalityof the electronic orbitals in excited state. This direc-tionality should improve direct, “one-step” electroninjection from ground state dye to CB TiO

In this article, we described about the preparation and electrochemical properties of a flexible energy storage system based on plastic polyethylene terephthalate (PET) substrate. The PET treated with UV/ozone was fabricated multilayer films composed 30 polyaniline (PANi)/graphene oxide (GO) bilayers using layer-by-layer assembly positively charged PANi negatively GO. conversion GO to reduced graphene (RGO) in film achieved hydroiodic acid vapor at <TEX>$100^{\circ}C$</TEX>, whereby...

Graphene oxide (GO) offers comparable efficiency in organic solar cells (OSCs) compared to the hole extraction layer (HEL), poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), while shelf lifetime shows a 6-fold increase.

Abstract Phenylthiolation of some carboxylic acids catalyzed by AlCl3 in the presence excess dehydrating agent (ZnCl2) has been achieved. Moreover, regiospecificity was tested dioic and found to be specific at aliphatic part functionality. Keywords: Dioic acidsphenylthiolationregiospecific esterification ACKNOWLEDGMENT The authors gratefully acknowledge Mr. M. Shahidul Islam, an instrument engineer BCSIR Dhaka, Bangladesh, for necessary 1H NMR IR spectra. Notes Note. Mp/bp were compared with...

In this article, we have designed and synthesized a novel donor-<TEX>${\pi}$</TEX>-acceptor (D-<TEX>${\pi}$</TEX>-A) type porphyrin-based sensitizer (denoted UI-5), in which carboxyl anchoring group 9,9-dimethyl fluorene were introduced at the meso-positions of porphyrin ring via phenylethynyl ethynyl bridging units, respectively. Long alkoxy chains ortho-positions phenyls supposed to reduce degree dye aggregation, tends affect electron injection yield photovoltaic cell. The cyclic...

The new catastrophe of a novel coronavirus (COVID-19s) with unstable symptoms has rapidly pulled danger to all age groups worldwide. We investigate possible causes the different nature and demography COVID-19. collected used secondary data from IEDCR website “Worldometer” 1st April 24th June for statistical analyses, including multi-criteria decision-making method (MCDM), topsis, advanced simple additive weighting (SAW) product (WPM) PCA. total number known COVID-19 patients in Bangladesh...

The present work investigated the catalytic degradation of polystyrene over zeolite and barium carbonate catalysts under heat reflux. spectroscopic analysis confirmed formation alkyl benzene on both BaCO3 catalysts. thermal stability products after was found to be lower compared pure polystyrene. crystallinity morphology before were also examined using X-ray diffraction scanning electron microscopy. In addition, a plausible mechanism pathway elucidated. produced ethyl cumene with high...

In this article, the fabrication and performance of supercapacitors prepared through electrochemical reduction applied at different voltage range from polyaniline/graphene oxide (PANi/GO) thin films, which are renewable materials with an excellent yield energy conversion is reported. The PANi/GO film was reduced electrochemically potential windows, scan rate number cycles acquired using layer-by-layer (LBL) assembly method. resultant electrodes displayed various specific capacitances after...

In this work, we report carbon-silicon bond formation in thiophene, assisted with alkylated silylchloride. The formylation reaction of silylated thiophene has been discussed and achieved 61% overall yield reactions. compounds obtained are characterized quantitatively qualitatively by using elemental analysis, FT-IR spectroscopy, UV/Visible proton NMR spectroscopy. This research work will boost chemists to make the utilize them various applications.&#x0D; Journal Engineering Science 11(1),...

COVID-19 is a highly infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-COV-2). Recently COVID -19 radiological literature focuses primarily on CT scan findings which are more sensitive (about 97%) and specific than chest x-ray. But it has to be remembered that performing not easy during this pandemic situation. So, the aim of study was analyze x-ray severity scoring system its association with outcome in young adult patient COVID-19. This cross-sectional...

Abstract An environmentally friendly, four‐component, one‐pot condensation reaction of phthalimide or phthalic anhydride, various aromatic aldehydes, ethylcyanoacetate, and hydrazine hydrate is presented.

Abstract In this investigation, lignin was phenolated and based PVA hydrogels synthesized. The highest yield in phenolation found to be 123% at 10% sulfuric acid charge L/P ratio of 1/4 120°C. FTIR spectra showing the increasing intensity bending vibration phenolic hydroxyl group (O–H) 1356 cm − 1 indicated successful lignin. A remarkable difference observed hydrogel preparation between (PhL) nonphenolated (L). Phenolated had 98% while yielded 88% 1:1 L/PVA ratio. At 2:1, did not form stable...