Compact TiO₂ is replaced by a low-temperature solution-processed TiO_X/60-PCBM layer for electron extraction in perovskite solar cells with high steady conversion efficiencies.

Abstract High-mobility semiconducting polymers offer the opportunity to develop flexible and large-area electronics for several applications, including wearable, portable distributed sensors, monitoring actuating devices. An enabler of this technology is a scalable printing process achieving uniform electrical performances over large area. As opposed deposition highly crystalline films, orientational alignment polymer chains, albeit commonly achieved by non-scalable/slow bulk schemes, more...

We have liftoff! Tightly packed self-assembled monolayers (SAMs) of ultrarigid conjugated azobenzenes incorporated into a Hg-based junction undergo reversible photoisomerization (see picture). The current–voltage curves indicate that the operates as current photoswitch result forces expressed by SAMs, which act light-powered cargo lifter. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z705339_s.pdf or from author. Please note:...

Photochromic systems can convert light energy into mechanical energy, thus they be used as building blocks for the fabrication of prototypes molecular devices that are based on photomechanical effect. Hitherto a controlled photochromic switch surfaces has been achieved either isolated chromophores or within assemblies randomly arranged molecules. Here we show by scanning tunneling microscopy imaging photochemical switching new terminally thiolated azobiphenyl rigid rod molecule....

Conductance switching associated with the photoisomerization of azobenzene-based (Azo) molecules was observed in nanoscopic metal-molecule-metal junctions. The junctions were formed by using a conducting atomic force microscope (C-AFM) approach, where metallic AFM tip used to electrically contact gold-supported Azo self-assembled monolayer. measured 30-fold increase conductance is consistent expected decrease tunneling barrier length resulting from conformational change molecule.

A new zwitterionic conjugated polyelectrolyte without free counterions has been used as an electron injection material in polymer light-emitting diodes. Both the efficiency and maximum brightness were considerably improved comparison with standard Ca cathode devices. The devices showed very fast response times, indicating that performance is, addition to hole blocking, due dipoles at interface, which facilitate injection.

In several types of cells, the activation receptor tyrosine kinase c-Met by its ligand hepatocyte growth factor (HGF) requires coreceptor CD44v6. The CD44 extracellular domain is necessary for autophosphorylation, whereas intracellular required signal transduction. We have already shown that cytoplasmic tail recruits ezrin, radixin and moesin (ERM) proteins to complex CD44v6, c-Met, HGF. now defined function ERM step they promote in signaling cascade. association absolutely mediate...

In this report, we investigate a formation mechanism for polymer chains aligned with various semiconductor polymers and microstructure directionally film through systematic analysis that includes polarized UV–visible–near infrared (UV–vis–NIR) absorption spectroscopy, atomic force microscopy, charge modulation microscopy (p-CMM), incident X-ray diffraction (GIXD) measurements. Through study, make two important observations: first, the highly organic films are achieved by off-center spin...

All-organic, fully-printed and semitransparent photodetectors with a broad wavelength band response, based on ternary blend comprising narrow band-gap small molecules, are demonstrated. The semiconducting polymer allows for the optimal printing of suppressing strong phase segregation, uncontrolled crystallization. insertion suitable interlayer enables adoption polymer, transparent, top bottom printed electrodes, thus making light detection possible from both device sides. As service to our...

Edible electronics will enable systems that can be safely ingested and degraded in the human body after completing their function, such as sensing physiological parameters or biological markers gastrointestinal tract, without risk of retention need recollection. The same are potentially suitable for directly tagging food, monitoring its quality, developing edible soft actuators control abilities. Designing appropriate power sources is critical to turn a vision into real opportunities. We...

The integration of 2D materials in triboelectric nanogenerators (TENGs) is known to increase the mechanical-to-electrical power conversion efficiency. are used TENGs with multiple roles as material, charge-trapping fillers, or electrodes. Here, novel based on few-layers graphene (FLG) electrodes and stable gel electrolytes composed liquid phase exfoliated 2D-transition metal dichalcogenides polyvinyl alcohol developed. embedding FLG composites show competitive open-circuit voltage (≈ 300 V),...

Abstract Ion conductive hydrogels are relevant components in wearable, biocompatible, and biodegradable electronics. Polyvinyl‐alcohol (PVA) homopolymer is often the favored choice for integration into supercapacitors energy harvesters as sustainable triboelectric nanogenerators (TENGs). However, to further improve hydrogel‐based TENGs, a deeper understanding of impact their composition structure on devices performance necessary. Here, it shown how ionic based an amorphous‐PVA (a‐PVA) allow...

Interdependence of chemical structure, thin‐film morphology, and transport properties is a key, yet often elusive aspect characterizing the design development high‐mobility, solution‐processed polymers for large‐area flexible electronics applications. There specific need to achieve >1 cm 2 V −1 s field‐effect mobilities ( μ ) at low processing temperatures in combination with environmental stability, especially case electron‐transporting polymers, which are still lagging behind hole...

Hebebühne: Dicht gepackte selbstorganisierte Monoschichten (SAMs) aus starren konjugierten Azobenzolderivaten zwischen zwei Elektroden gehen eine reversible Photoisomerisierung ein (siehe Bild). Die Strom-Spannungs-Kurven identifizieren die Anordnung als Stromphotoschalter, in dem SAM wie lichtgetriebene Hebebühne wirkt.

Abstract Aiming at modulating the packing density within functional self‐assembled monolayers (SAMs), two azo‐biphenyl derivatives AZO1 and AZO2 comprising a terminal sulfur anchor group have been designed synthesized. While allows for coplanar arrangement of both biphenyl subunits, additional steric repulsion due to methyl side groups attached footing results in an increased intermolecular distance SAM, providing free volume. SAMs on gold platinum substrates formed thoroughly investigated...

We report that we can enhance the performance of polymer photovoltaics by introducing materials with dipoles at donor–acceptor interface solar cells. use a zwitterionic conjugated polyelectrolyte (ZCPE) as an interfacial layer in model bi-layer system consisting donor and acceptor polymers. find increase short-circuit current fill factor when 2 nm thin ZCPE is introduced between Absorption light interlayer contributes to photocurrent, and, revealed time-resolved pump–push optical...

Abstract It is still a matter of controversy whether the relative difference in hole and electron transport solution-processed organic semiconductors either due to intrinsic properties linked chemical solid-state structure or extrinsic factors, as device architecture. We here isolate factors affecting within same film microstructure model copolymer semiconductor. Relatively, holes predominantly bleach inter-chain interactions with H-type electronic coupling character, while electrons’...

Abstract CD44, a large family of transmembrane glycoproteins, plays decisive roles in physiological and pathological conditions. CD44 isoforms are involved several signaling pathways essential for life such as growth factor-induced by EGF, HGF or VEGF. is also the main hyaluronan (HA) receptor HA-dependent processes. To allow genetic dissection functions homeostasis disease, we generated Cd44 floxed allele allowing tissue- time-specific inactivation all vivo . As proof principle, inactivated...

Recent evidence has shown that the activation of receptor tyrosine kinases is not only dependent on binding their ligands but in addition requires adhesion molecules as coreceptors. We have identified CD44v6 a coreceptor for c-Met several tumor and primary cells. The ectodomain required activation, whereas cytoplasmic tail recruits ERM proteins cytoskeleton into signalosome complex. Here we demonstrate (and hepatocyte growth factor Gab1) haploinsufficient cd44-/- background, cd44-/-; met+/-...

CD44 isoforms act as coreceptors for the receptor tyrosine kinases c-Met and VEGFR-2. However, Cd44 knockout mice do not show overt phenotypes, in contrast to Met Vegfr-2 mice. We hypothesized that is being compensated by another factor null Using RNAi technology blocking experiments with antibodies, peptides, purified ectodomains, well overexpression studies, we identified intercellular adhesion molecule-1 (ICAM-1) a new coreceptor CD44-negative tumor cells primary hepatocytes obtained from...

Receptor Tyrosine Kinases (RTKs) are involved in many cellular processes and play a major role the control of cell fate. For these reasons, RTK activation is maintained under tight control. Met an essential that induces proliferation, differentiation, migration, survival branching morphogenesis. Deregulation by overexpression, amplification or lack effective degradation leads to cancer metastasis. We have shown relies on CD44v6 for its signaling several lines also primary cells. In this...

Photodetectors convert light pulses into electrical signals and are fundamental building blocks for any opto-electronic system adopting as a probe or information carrier. They have widespread technological applications, from telecommunications to sensors in industrial, medical civil environments. Further opportunities plastic short-range communications systems, interactive large-area surfaces light-weight, flexible, digital imagers. These applications would greatly benefit the cost-effective...