Despite the great promise of printed flexible electronics from 2D crystals, and especially graphene, few scalable applications have been reported so far that can be termed roll‐to‐roll compatible. Here we combine screen printed graphene with photonic annealing to realize radio‐frequency identification devices with a reading range of up to 4 meters. Most notably our approach leads to fatigue resistant devices showing less than 1% deterioration of electrical properties after 1000 bending cycles. The bending fatigue resistance demonstrated on a variety of technologically relevant plastic and paper substrates renders the material highly suitable for various printable wearable devices, where repeatable dynamic bending stress is expected during usage. All applied printing and post‐processing methods are compatible with roll‐to‐roll manufacturing and temperature sensitive flexible substrates providing a platform for the scalable manufacturing of mechanically stable and environmentally friendly graphene printed electronics.
Properties of context-free languages and grammars permitting deterministic top-down recognition with bounded lookahead are discussed. In particular, it is shown that for eachk>1 there are such languages requiring a lookahead of at leastk characters. 相似文献
X-ray diffraction intensities were measured from antiferromagnetic NiO. The data were submitted to a nonparametric multipole analysis aimed at formulation of experimentally valid statements on the nature of charge distribution. Strong “bonding maxima” appear between the Ni〈100〉O nearest neighbors in the region of the oxygen atoms involving NiO coupling. An electronic cage structure is also observed. This is parallel to the observations on MnO and CoO but different in nature, being formed by separate cubic cages for the cations instead of the oxygen, and without a clear indication of an extended network buildup. 相似文献
Polycrystalline samples of FeSe0.82 and FeSe0.5Te0.5 were synthesized using a solid-state reaction route. Bulk superconductivity was confirmed using SQUID magnetometry. The onset of Tc was at 8.0 K for FeSe0.82 and 12.5 K for FeSe0.5Te0.5. Paramagnetic 57Fe Mössbauer spectra were recorded at temperatures between 5.4 and 320 K in transmission geometry. All spectra exhibited simple quadrupole splitting. For FeSe0.5Te0.5 a small drop in the quadrupole splitting was observed about Tc upon cooling. Additionally, for both samples the isomer shift and the total absorption started to drop around Tc, indicating a softening of the lattice. The drop is estimated to correspond to at least 60 K from the original Debye temperatures. 相似文献
The notion of joint actions provides a framework in which the granularity of atomic actions can be refined in the design of concurrent systems. An example of a telephone exchange is elaborated to demonstrate the feasibility of this approach for reactive systems and to illustrate transformations that are justifiable in such a process. Particular problems arise when a refinement would allow new interleavings of semantically relevant events. The meaning of a reactive computation is specified in a way that makes this possible.Dedicated to Peter Naur on the occasion of his 60th birthday 相似文献