Abstract The final performance of a composite material depends strongly on the quality fibre-matrix interface. interactions developed at interface were studied using acid-base or acceptor-donor concept. surface characteristics carbon fibres and epoxy matrix tensiometric method inverse gas chromatography technique. Acid-base characters could be determined allowing to described by specific interaction parameter. It was shown that shear strength interface, as measured fragmentation test, is...

We present results on a new fullerene-based anchoring group for molecular electronics. Using lithographic mechanically controllable break junctions in vacuum we have determined the conductance and stability of single-molecule 1,4-bis(fullero[c]pyrrolidin-1-yl)benzene. The compound can be self-assembled from solution has low-bias 3 x 10(-4) G0. Compared to 1,4-benzenedithiol fullerene-anchored molecule exhibits considerably lower spread. In addition, signature histograms is more significant...

Butyl, hexyl, and decyl derivatives of the liquid-crystalline organic semiconductor 5,5' '-bis(5-alkyl-2-thienylethynyl)-2,2':5',2' '-terthiophene were synthesized studied with respect to their structural, optical, electrical properties. By means an optimized thermal annealing scheme hexyl compounds could be processed into self-assembled monodomain films up 150 mm in diameter. These investigated X-ray diffractometry, which revealed a clearly single-crystalline monoclinic morphology lamellae...

We have investigated electrical transport through the molecular model systems benzenedithiol, benzenediamine, hexanedithiol and hexanediamine. Conductance histograms under different experimental conditions indicate that measurements using mechanically controllable break junctions in vacuum are limited by surface density of molecules at contact. Hexanedithiol typically exhibit a broad peak around 7 * 10^{-4} G_0. In contrast to recent results on STM-based solution we find spread...

Transition Voltage Spectroscopy (TVS) has been proposed as a tool to analyze charge transport through molecular junctions. We extend TVS Au-vacuum-Au junctions and study the distance dependence of transition voltage V_t(d) for clean electrodes in cryogenic vacuum. On one hand, this allows us provide an important reference V_t(d)-measurements on other we show that forms simple powerful test vacuum tunneling models.

We have exploited the electromechanical properties of gated mechanical break junctions to form single-atom relays. The gate voltage can be used reversibly switch between a monatomic contact with conductance around 2e2/h and tunneling regime. In tunneling, source−drain varies smoothly voltage. characteristics devices understood within simple continuum model. It indicates that elastic substrate facilitate tuning details switching depend sensitively on nanoscale geometry electrode tips.

Different bridging geometries can explain the observation that porphyrin molecules with added thiol end groups and pyridine axial form more-stable single-molecule junctions an increased spread in low-bias conductance. The stability of these is demonstrated by time-dependent conductance measurements. In contrast, rodlike show one preferential binding geometry.

We introduce a new device architecture for the independent mechanical and electrostatic tuning of nanoscale charge transport. In contrast to previous gated break junctions with suspended source–drain electrodes, devices presented here prevent an electromechanical electrode gap by gate. This significant improvement originates from direct deposition source drain electrodes on gate dielectric. The plasma-enhanced native oxide aluminum enables measurements at voltages up 1.8 V cryogenic...

We present a modular high-vacuum setup for the electrical characterization of single molecules down to liquid helium temperatures. The experimental design is based on microfabricated mechanically controllable break junctions, which offer control over distance two electrodes via bending flexible substrate. actuator part divided into stages. slow stage differential screw drive with large range. An amplified piezoceramic forms fast setup, can operate at speeds up 800 μm/s. In our junctions this...

We have investigated charge transport in ZnTPPdT-Pyr (TPPdT: 5,15-di(p-thiolphenyl)-10,20-di(p-tolyl)porphyrin) molecular junctions using the lithographic mechanically controllable break-junction (MCBJ) technique at room temperature and cryogenic (6 K). combined low-bias statistical measurements with spectroscopy of levels form I(V) characteristics. This combination allows us to characterize a junction detail. complex molecule can different configurations, having an observable effect on...

Discrete-trial functional analysis (DTFA) is an experimental method for determining the variables maintaining problem behavior in context of natural routines. Functional communication training (FCT) effective replacing behavior, once identified, with a functionally equivalent response. We implemented these procedures environment three individuals developmental disabilities who resided residential treatment facility. Study 1 results show that DTFA experimentally validated function each...

We report on the vibrational fingerprint of single C60 terminated molecules in a mechanically controlled break junction (MCBJ) setup using novel statistical approach manipulating to address different molecular configurations and monitor corresponding modes. In IETS spectra, vibrations anchoring dominate spectra; thus information unit anchored with electrodes is masked by modes arising from groups. However, we have identified additional fluorene backbone optically.

Our primary purpose in this study was to examine the structure of a response class when new members are acquired through mand training. To do this, we replaced existing mands (e.g., reaching) three children with autism two functionally equivalent mands. Next, examined their responding under immediate- and delayed-reinforcement conditions. Then, assessed generalization novel social partners. We employed reversal design effectiveness training assess both results suggest that all emitted these...

We used functional communication training to teach Bob, a 10‐year‐old student with autism and severe language delays, reject items by touching an icon. Our initial assessment revealed that Bob’s behaviours serving rejecting function consisted of pushing away, yelling, bear hugging‐grabbing, leaving. prompting, differential reinforcement, error correction procedures replace away icon reject. examined the effects this direct intervention on other determine if there was any response...

Unterschiedliche Brückengeometrien können die Beobachtung erklären, dass Porphyrinmoleküle mit Thiolendgruppen und axialen Pyridingruppen stabilere Einzelmolekülkontakte einer größeren Spanne der Ruheleitfähigkeit bilden. Die Stabilität dieser Geometrien wurde in zeitabhängigen Leitfähigkeitsmessungen gezeigt. Stäbchenförmige Moleküle dagegen haben eine bevorzugte Bindungsgeometrie.

We created and evaluated a professional development package for training four teachers to embed instructional interactions during outdoor time enhance the play skills of young children with significant developmental disabilities. The included an initial 20-min session that consisted providing written verbal instructions, modeling, rehearsal feedback. Following session, we provided self-monitoring cards guide their feedback (i.e., coaching) on performance. Researcher involvement was faded...

In this study, we extended the literature on negatively-reinforced mands by teaching multiple novel, socially appropriate alternative to two young children with autism spectrum disorder (ASD). First, replaced existing (e.g., pushing away) appropriate, mands. Next, examined responding under immediate- and delayed-reinforcement conditions assess resurgence determine whether function of communicative behavior influences consistency which different are emitted. Finally, generalization social...

Long glass reinforced materials are broadly used in the automotive industry due to their good mechanical performance, competitive price and options for functional integration order reduce weight. With rapidly changing environmental requirements, a demand further weight reduction is growing constantly. Designs LGF-PP can bring light solutions combination with system cost improvement. There quite some possibilities applying technologies nowadays. These have be evaluated based on potential, but...

We have investigated charge transport in ZnTPPdT-Pyr molecular junctions using the lithographic MCBJ technique at room temperature and cryogenic (6K). combined low-bias statistical measurements with spectroscopy of levels I(V) characteristics. This combination allows us to characterize a junction detail. complex molecule can form different configurations, which is observed trace histograms current-voltage (I(V)) measurements. Both methods show that multiple stable single-molecule...