Abstract The crystallization properties of three regioregular poly(3‐alkyl thiophene)s (P3ATs) are studied: poly(3‐hexyl thiophene) (P3HT), poly(3‐octyl (P3OT), and poly(3‐dodecyl (P3DDT). morphology the isothermally crystallized samples is a whisker type. values enthalpy fusion ideal crystals (Δ H ), determined from melting point depression in polymer–diluent system, 99, 73.6, 52 J/g for P3HT, P3OT, P3DDT, respectively. equilibrium ( T Hoffman–Weeks extrapolation procedure, 300, 230, 180 °C...

In situ Ag nanoparticles are produced on reduction of Ag+ with N,N-dimethylformamide in the presence poly(vinylidene fluoride) (PVF2). The plasmon band transition is monitored time reaction mixture for three sets experiments by UV-vis spectroscopy. absorbance increases sigmoidally log(time). Analysis data Avrami equation yields an exponent n value between 1.5 and 2.0, indicating two-dimensional nucleation linear or diffusion controlled growth. TEM study polymer nanocomposites (PNC) indicates...

Poly(vinylidene fluoride) (PVF2)−multiwalled carbon nanotube (MWNT) nanocomposites (PCNCs) are prepared using ester (−COOC2H5)-functionalized MWNT (F-MWNT). Due to the specific interaction of >CO group in F-MWNT and >CF2 PVF2, dispersion PVF2 matrix is uniform. Transmission electron microscopy study reveals that F-MWNTs composite fatter than pure indicating chains wrapped on surface MWNTs. In nanocomposites, spherulitic morphology lost fibrils curled smaller length those sample. Field...

We have developed a new highly fluorescent graphene oxide (GO)/poly(vinyl alcohol) (PVA) hybrid (GO-PVA) in an acidic medium (pH 4). Fourier transform infrared (FTIR) spectra indicate the formation of hydrogen bonds between hydroxy group PVA and groups GO. The is fluorescent, because passivation by bonding, as evident from Raman spectra. quantum yields GO-PVA hybrids are higher than that microscopic images exhibit fibrillar morphology, all them emit intense green light. Field-emission...

Multiwalled carbon nanotubes (MWNTs) are functionalized covalently with ionic liquid (IL, 3-aminoethyl imidazolium bromide) which helps good dispersion of IL-functionalized MWNTs (MWNT-IL) in the poly(vinylidene fluoride) (PVDF) matrix. Analysis transmission electron microscopy (TEM) micrographs suggests ∼10 nm coating thickness by ILs, and covalent linkage ILs is confirmed from FT-IR Raman spectra. PVDF nanocomposites full β-polymorphic (piezoelectric) form prepared using MWNT-IL both...

A porous 3D folic acid (F)-polyaniline (PANI) hybrid hydrogel (F-PANI), produced by in situ polymerization of aniline, exhibit highest compressive stress (15.1 kPa), hierarchical network morphology with BET surface area 236 m2/g. Here, PANI is present emeraldine salt (ES) state, which facilitates excellent adsorption anionic pollutants. It exhibits an extremely high capacity for Cr(VI) and during reduced to Cr(III).The electrical impedance spectra the adsorbed xerogel, support conversion...

The last twenty years have witnessed increasing research activity in the area of supramolecular chemistry 1 : co-assembly melamine (M)–cyanuric acid (CA), since historic discovery M·CA aggregate crystal form and its structural analysis by Wang his coworkers 1990. Its useful chemical structure fascinating H-bonding interaction sites distinguish M analogous derivatives as scaffolding components field to develop desired nano-to-micro scaled architecture. To date, M-based assemblies are known...

A new and facile approach for synthesizing graphene quantum dots (GQDs) using sono-Fenton reaction in an aqueous dispersion of oxide (GO) is reported. The transmission electron microscopy (TEM) micrographs GQDs indicate its average diameter as ∼5.6 ± 1.4 nm having a lattice parameter 0.24 nm. are used to fabricate composites (PG) with water-soluble polymer, polythiophene-g-poly[(diethylene glycol methyl ether methacrylate)-co-poly(N,N-dimethylaminoethyl methacrylate)]...

This review deals with hybrid polymer gels, presently and significantly used for low-cost high performance solar cells, fuel solid state batteries supercapacitors stability, flexibility stimuli-responsiveness.

Recently, significant attention has drawn in the field of photo-supercapacitors by coupling a photovoltaic cell within supercapacitor device providing generation and storage power single device. Here,...

Soluble poly(3-hexylthiophene) (P3HT)−multiwalled carbon nanotube (MWNT) nanocomposites (PCNCs) are prepared by the in-situ oxidative polymerization of 3-hexylthiophene (3HT) in a dispersion MWNT CHCl3. The MWNT−P3HT nanocomposite produces blackish-brown solution chloroform, making it an easily processable system. With increase concentration molecular weight P3HT has increased, but at higher (8% w/w) decreased. head−tail (H−T) regioregularity samples remains same with that pure P3HT. TEM...

Polymer nanocomposites (PNCs) of poly(3-hexylthiophene) (P3HT) with organically modified montmorillonite (om-MMT) clay have been prepared by the solvent casting method. WAXS and TEM studies indicate exfoliated structure for lower content, but at higher content (5%, w/w) intercalated structures appear. The interchain lamella P3HT exists in nanocomposite, crystals become more ordered, showing better X-ray diffraction peaks. thermal stability PNCs increases significantly, 1% PNC exhibits...

Here we report the grafting of N,N-dimethylaminoethyl methacrylate (DMAEMA) directly from poly(vinylidene fluoride) (PVDF) backbone in solution phase by atom transfer radical polymerization (ATRP). The graft length is same for different times but density increases with increasing time. Four copolymers are prepared and depending on time conversion they designated as PD-6, PD-12, PD-18, PD-24, number indicates (h) polymerization. A maximum 36% (w/w) respect to monomer achieved PD-24 sample....

A coassembled light-harvesting hydrogel of melamine (M), 6,7-dimethoxy-2,4[1H, 3H]-quinazolinedione (Q) with riboflavin (R), is used to produce a white-light-emitting (W-gel) by mixing the dye rhodamine B (RhB) in requisite proportion. Addition R Q solution causes both static and dynamic quenching emission as evident from Stern-Volmer plot shows gradual increase intensity. On addition RhB an aqueous R, fluorescence resonance energy transfer (FRET) occurs, showing peak at 581 nm. In constant...

In aqueous dispersions of graphene quantum dots (GQDs), aniline is <italic>in situ</italic> polymerized to produce polyaniline-GQDs hybrids and dye-sensitized solar cells fabricated with the indicate highest power conversion efficiency 3.12%.

Functionalized graphene-based drug delivery vehicles have conquered a significant position because functionalization improves its biocompatibility and stability in cell medium, leaving sufficient graphitic basal plane for loading through π–π stacking. In this study, poly(N-isopropylacrylamide) (PNIPAM) is covalently grafted from the surface of graphene oxide (GO) via facile, eco-friendly an easy procedure free radical polymerization (FRP) using ammonium persulfate initiator. Various...

Different synthetic procedures for water soluble polythiophenes and their applications in sensing, detection of biomolecules optoelectronic devices are discussed.

The folic acid (F) gel, prepared in a 1 : dimethyl sulfoxide (DMSO)–water mixture (v/v), at 0.2% (w/v) concentration has nano-fibrous network morphology. FTIR spectra indicate the presence of intermolecular H-bonding interactions gel. acid–chitosan (C) hybrid (FC) gel (prepared by mixing 0.1 ml 1% C solution with 2 F solution) appears as yellow transparent semi-solid mass consisting higher density branches. fibrillar diameter FC (10.5 nm) is much lower than that (17.3 nm). band 3390 cm−1...