Interdependence between ink, substrate and sintering method on inkjet printed devices.

A metal-free approach combining sulfoxide-directed C–H cross-couplings with tuneable heterocyclizations and dimerizations allows expedient access to important organic materials.

Low voltage organic field-effect transistors (OFETs) using solution-processed cyanoethyl cellulose (CEC) and CEC-based nanocomposites as the gate dielectric are demonstrated. Barium strontium titanate (BST) nanoparticles homogeneously dispersed in CEC to form high-k (18.0 ± 0.2 at 1 kHz) nanocomposite insulator layer. The optimised p-channel DPPTTT OFETs with BST-CEC operate minimal hysteresis, display mobilities excess of cm2 V−1 s−1 3 V, possess low subthreshold swings (132 8 mV dec−1),...

Abstract Organic field‐effect transistors (OFETs) have shown great promise for use as chemical sensors applications that range from the monitoring of food spoilage to determination air quality and diagnosis disease. However, these devices be truly useful, they must deliver reliable stable low‐voltage operation over extended timescales. An important element address this challenge is development a high‐capacitance gate dielectric delivers excellent insulation with robust resistance against...

Abstract A novel method of creating planar aligned columnar discotic liquid crystals (cDLCs) on surfaces, which also gives control over the azimuthal angle, is presented. Surfaces are chemically patterned with stripes via microcontact printing organothiol self‐assembled monolayers (SAMs) gold, or deep UV patterning organosilane SAMs silicon. These then used to isolate long droplets cDLCs by dewetting in isotropic phase. Upon cooling from into hexagonal phase, polarizing microscopy reveals...

Abstract A range of triphenylene and phthalocyanine‐based discotic liquid crystals (DLCs) can be aligned within micrometer‐scale channels formed from SU8 patterned on silicon or glass surfaces. The filled with the DLC in its isotropic phase using capillary action. Alignment occurs spontaneously as sample is slowly cooled into Col h phase. Whilst all these DLCs align columns perpendicular to surface when they are ‘sandwiched’ between slides, channels, aligns column director parallel surface....

Abstract Organic semiconductors (OSCs) promise to deliver next‐generation electronic and energy devices that are flexible, scalable printable. Unfortunately, realizing this opportunity is hampered by increasing concerns about the use of volatile organic compounds (VOCs), particularly toxic halogenated solvents detrimental environment human health. Here, a cradle‐to‐grave process reported achieve high performance p‐ n‐type OSC based on indacenodithiophene diketopyrrolopyrrole semiconducting...

An interdigitated electrode sensor was designed and microfabricated for measuring the changes in capacitance of three phosphate selective molecularly imprinted polymer (MIP) formulations, order to provide hydroponics users with a portable nutrient sensing tool. The MIPs investigated were synthesised using different combinations functional monomers methacrylic acid (MAA) N-allylthiourea, against template molecules diphenyl phosphate, triethyl trimethyl phosphate. A cross-interference study...

Borylative fusion of BSe and BTz containing donor–acceptor oligomers gives fused boracycles with a reduction in the energy LUMO by up to 0.65 eV. This leads red shift emission <italic>ca.</italic> 200 nm use these materials for fabrication NIR OLEDs.

A modular approach to underexplored, unsymmetrical [1]benzothieno[3,2-b][1]benzothiophene (BTBT) scaffolds delivers a library of BTBT materials from readily available coupling partners by combining transition-metal free Pummerer CH-CH-type cross-coupling and Newman-Kwart reaction. This effective has allowed their properties be studied. In particular, tuning the functional groups on scaffold allows solid-state assembly molecular orbital energy levels modulated. Investigation charge transport...

BACKGROUND: The difficult airway is frequently encountered across many scenarios. extreme form a “cannot intubate and cannot oxygenate” scenario, which lacks reliable rescue technique. Previous case reports or studies with small sample sizes indicate the feasibility efficiency of an endotracheal tube in pharynx (TTIP) to ventilate patients. We hypothesize that ventilation via TTIP effective technique for failed mask ventilation. METHOD: One hundred forty-seven patients potentially airways...

Controllable p-type doping of both poly(3-hexylthiophene) (P3HT) and poly(triarylamine) (PTAA) organic field effect transistors (OFETs) was achieved by immersing complete top-contact OFETs in a solution 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) acetone. As this method is applied to devices, it has greater utility than methods involving the prior film deposition as allows separation device processing steps, facilitating use optimal conditions at each stage. It found that...

We describe experimental and theoretical results that demonstrate the feasibility of power generation using concentration cells based on ionic gradients reverse electrodialysis. A peak density 0.2 (0.7) μW cm−2 a maximum energy 0.4 (0.4) mJ cm−3 delivered in 3 h to 2 (5) kΩ resistor were recorded microfiltration (anion exchange) membrane, respectively. comprehensive model is developed predict evolution output voltage with time relation solute each cell derive efficiency limits.

Self assembled monolayer field effect transistors (SAMFETs) are reported using a phenylene‐thiophene containing semiconducting mesogen attached through trichlorosilane anchoring group. Monolayer films, covalently to silicon dioxide substrates, form in less than 10 h from solution, thanks the accelerated reaction of anchor. Devices exhibit mobilities as high 1.7 × −2 cm 2 V −1 s , currents up 15 μA (on/off current ratio 6 ) with device yields close unity over large areas for channel lengths 100 μm.

Type-II NADH:quinone oxidoreductases (NDH-2s) are an important element of microbial pathogen electron transport chains and attractive drug target. Despite being widely studied, its mechanism catalysis still poorly understood in a hydrophobic membrane environment. A recent report for the Escherichia coli NDH-2 showed NADH oxidation solution-based assay but apparently reverse reaction electrochemical studies, calling into question validity approach. Here we well-studied from Caldalkalibacillus...

It has been shown that the base-initiated cyclo-oligomerisation of phthalonitriles is favoured by bulky α-substituents making it possible to obtain metal-free phthalocyanine directly and in high yield. The with eight α-isoheptyl substituents gives a time-of-flight hole mobility 0.14 cm(2)·V(-1)·s(-1) within temperature range columnar hexagonal phase, 169-189 °C.

Dialkoxy and dialkyl substituted paracyclophane-1,9-dienes undergo bidirectional ring opening metathesis polymerisation (ROMP) on addition of bifunctional Hoveyda–Grubbs initiators.

Dialkoxy- and dialkyl-substituted phenylene benzothiadiazole paracyclophane-1,9-diene monomers undergo living ring-opening metathesis polymerization using ruthenium carbene initiators (G3) to give regularly alternating cis,trans-poly(p-phenylenevinylene) copolymers. These polymers can be readily isomerized in dilute solution visible light the all-trans polymers. The influence of polymer microstructure substituents on optical electrochemical properties these is examined.

The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains.

At the University of California Santa Cruz, a renewable energy sources course is theory based that includes six hands-on laboratory experiments. The designed for engineering and non-engineering undergraduate students does not require any advanced mathematics or physics background. Each experiment introduces miniature version an conversion device mimics insights workings real scale device. experiments illustrate principles the; solar pathfinder, flywheel, hydroelectricity, wind turbine,...

Sequential ROMP of electron rich and deficient paracyclophanediene monomers gives donor–acceptor di-, tri- even tetrablock phenylenevinylene coploymers.

Under a layer of 0.1 M HCl in isopropanol, soft ultraviolet (UV) (365 nm) photolysis the thiol-on-gold self-assembled monolayer (SAM) derived from lipoic acid ester α-hydroxy-1-acetylpyrene results expected removal acetylpyrene protecting group. When photolyzing through mask, this can be used to produce patterned surface and, at controlled electrochemical potential, it is then possible selectively and reversibly electrodeposit copper on photolyzed regions. Rather surprisingly, under these...