Abstract Printed organic photodetectors can transform plastic, paper or glass into smart surfaces. This innovative technology is now growing exponentially due to the strong demand in human-machine interfaces. To date, only niche markets are targeted since sensors still present reduced performances comparison with their inorganic counterparts. Here we demonstrate that it possible engineer a state-of-the-art photodetector approaching of Si-based photodiodes terms dark current, responsivity and...

Abstract By using Si(HIPEs) as hard, exotemplating matrices, interconnected macro‐/microporous carbon monolith‐type materials with a surface area of around 600 m 2 g −1 are synthesized and shaped. The carbonaceous foams exhibit conductivity 20 S cm , addressed excellent mechanical properties (Young's modulus 0.2 GPa toughness 13 J when the core is optimized). above‐mentioned specificities, combined fact that external shape size can be easily designed on demand, primary importance for...

The surface of cotton cellulose nanowhiskers (CNW's) was esterified by vinyl acetate (VAc) and cinnamate (VCin), in the presence potassium carbonate as catalyst. Reactions were performed under microwave activation monitored Fourier transform infrared (FT-IR) spectroscopy. supramolecular structure CNW's before after modification characterized X-ray diffraction (XRD) atomic force microscopy (AFM). Distinctively from acetylation treatment, an increase particles dimensions noted esterification...

By using different polysaccharide and polysulfonylimide type polyelectrolytes for the synthesis of aqueous PEDOT:polyelectrolyte dispersions, influence polyelectrolyte backbone anionic groups on properties resulting complex has been studied. The obtained systems were characterized regarding doping morphology complexes in dispersion as well optoelectronic dry films. Polyelectrolytes with high molar mass, a rigid backbone, strongly acidic functionalities resulted highly conducting films, while...

The advantageous biological properties of polysaccharides and precise stimuli-responsiveness elastin-like polypeptides (ELPs) are great interest for the design polysaccharide- polypeptide-based amphiphilic block copolymers biomedical applications. Herein, we report synthesis characterization a series polysaccharide-block-ELP copolymers, containing two biocompatible biodegradable blocks coupled via copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC). resulting bioconjugates capable...

Abstract Thin films of a molecular spin crossover (SCO) Iron(II) complex featuring high transition temperature are grown by sublimation in vacuum on TS Au and investigated X‐ray UV photoelectron spectroscopies. Temperature‐dependent studies demonstrate that the thermally induced behavior is preserved thin films. A large‐area ultrathin switchable vertical tunnel junction with top electrodes liquid eutectic gallium indium, for which spin‐state switching induces two orders magnitude change...

Helical aromatic foldamers are bioinspired architectures that combine through-bond and through-space charge transport in a single molecule.

The aim of the work is to compare properties nanohydroxyapatite coatings obtained using electrophoretic deposition method (EDP) at 10 V, 20 and 30 with deposit times 2 5 min. primary sedimentation was used minimize risk formation particle agglomerates on sample surface. Evaluation coating performed by a Scanning Electron Microscope (SEM), Energy-Dispersive Spectroscopy (EDS), Atomic Force Microscopy (AFM), optical profilometer, drop shape analyzer, nanoscratch tester. All are homogeneous...

We report the preparation of a helical complex and its study in molecular junctions. show that SAMs this racemic compound present electrically robust behaviour which will pave way for future studies on CISS effect with analogous enantiopure compounds.

We have overcome the cost and time consumption limitations of common lithography techniques used to control self-assembly block copolymers into highly ordered 2D arrays through use a guiding pattern created from polymeric sub-layer. The is sinusoidal surface-relief grating interferometrically inscribed onto an azobenzene containing copolymer sub-layer leading defect-free single grain domains.

Herein we report a novel method for high-yield surface esterification of cellulose nanocrystals (CNCs) in water, by transesterification vinyl esters. The esterified nanoparticles were simply produced heating under stirring water dispersion CNCs heterogeneous mixture with acetate, potassium carbonate as catalyst. Reactions performed different conditions, to investigate the impact parameters, such amount reagent, temperature and reaction time. In optimized grafting level could be easily...

This work describes the study of molecular junctions embedding spin crossover complex [Fe(H₂B(pz)₂)₂(phen)] as an active switchable thin film.

We report the synthesis of a well-defined hybrid ABC triblock terpolymer containing synthetic poly(trimethylene carbonate) (PTMC) block A and thermosensitive BC diblock recombinant elastin-like polypeptides (ELPs). The in diluted solution (0.1–0.3% w/v), at low temperatures ultrapure water, forms micellar structures 10–60 nm sizes diameter as characterized by dynamic light scattering (DLS) liquid atomic force microscopy (AFM). While heated above its transition temperature (Tt), larger...

Abstract Relaxor ferroelectric polymers exhibit high k at their structural phase transition around room temperature. They are particularly attractive as gate dielectric in organic field effect transistor (OFET). Nevertheless, applications limited due to low thermal stability. A polymer blend system with a and thermally stable constant is demonstrated by mixing terpolymer poly(vinylidene fluoride‐trifluoroethylene‐chlorofluorethylene) P(VDF‐ ter ‐TrFE‐ ‐CFE) copolymer...

Laterally ordered sub-10 nm features are produced from the directed self-assembly of poly(1,1-dimethyl silacyclo­butane)-block-poly(methyl methacrylate) (PDMSB-b-PMMA) thin films on sinusoidal azobenzene-containing patterns. The use surface relief grating enables formation very large grain areas (over several µm2) consisting out-of-plane PMMA cylinders. Directed (DSA) block copolymers (BCPs) has received great research attention as a promising candidate for next-generation lithography since...

The fabrication of organic solar cells from aqueous dispersions photoactive nanoparticles has recently attracted the interest photovoltaic community, since these offer an eco-friendly solution for cells, avoiding use toxic solvents. In this work, pure poly[n-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl-C71 -butyric acid methyl ester (PC71 BM) nanoparticles, as well composite PC71 BM:PCDTBT are prepared using nanoprecipitation...

The interfacial effects are critical to understand the nanocomposite behavior based on polymer matrices. These dependent upon morphology of carbon nanotubes, type used and processing technique. Indeed, we show that different parameters, as eventual surfactant use, ultrasonic treatment shear mixing have be carefully examined, in particular, for nanotube dispersion their possible alignment. A series multiwalled nanotubes (MWNT) been mixed with a regular epoxy resin under controlled way prepare...

Cellulose nanocrystals (CNCs) are promising candidates for a myriad of applications; however, successful utilization CNCs requires balanced and multifunctional properties, which require ever more applied concepts supramolecular tailoring. We present here facile straightforward route to generate dual functional using poly(acrylic acid) (PAA) biosynthetic elastin-like polypeptides (ELPs). utilize thiol-maleimide chemistry SI-ATRP harvest the temperature responsiveness ELPs pH sensitivity PAA...

Block copolymer-templated gold nanostructured surfaces of high refractive index due to controlled plasmonic nanoparticle shape.

Abstract Graphene in water is electrically charged most conditions. The level of charge can be large enough to stabilize single (or few) layer graphene colloidal dispersions water, without the need using any other additive. In this work, potentiometric titration, isothermal titration calorimetry, electrokinetic measurements, Density Functional Theory calculations, Raman Spectroscopy, and direct force measurements Atomic Force Microscopy investigate explore its origin are combined. body data...

The organization process of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with FePt nanoparticles is studied. In a first step, it shown that stabilized by oleic acid ligands are distributed within the PS matrix phase, whereas same particles partially covered short dopamine-terminated-methoxy poly(ethylene (mPEO-Dopa) located at PS/PEO interfaces. swelling domains, induced FePt_oleic during solvent annealing process, results in formation disordered...