Science 14Feb2020

MATERIALS SCIENCE Ionoelastomer junctions between polymer networks of fixed anions and cations Hyeong Jun Kim^1 , Baohong Chen^2 ...

counterions and contain no liquid compo- nents; thus, they are inherently not subject to leakage or evaporation. We prepare poly ...

ES/AT heterojunctions. The slope from−0.5 to +0.2 V is 2.1 ± 0.2mF/cm^2 , comparable to the IDL capacitance from ac impedance, w ...

as components for controlling ionic currents in integrated circuits, soft actuators, energy conversion and storage applications, ...

CATALYSIS Dry reforming of methane by stable Ni–Mo nanocatalysts on single-crystalline MgO Youngdong Song^1 , Ercan Ozdemir2,3, ...

As prepared, NiMoCat was tested for activity under dry reforming conditions: 50 mL min–^1 over a 50-mg catalyst loading, 800°C, ...

any visible interaction with the support. MgO remains as a support, with negligible leach- ing or spillover, as expected (Fig. 3 ...

gradually disappears could be another rea- son for the mobility of Ni–Mo nanocrystals during the NiMoCat activation. That Ni K-e ...

hand, EXAFS analyses in Fig. 4B explains that the particle size of Ni metallic atoms in NiMoCat are slightly increased with incr ...

TOPOLOGICAL MATTER Helical quantum Hall phase in graphene on SrTiO 3 Louis Veyrat^1 , Corentin Déprez^1 , Alexis Coissard^1 , Xi ...

terms, whose amplitudes and signs can be strongly renormalized by the long-range part of the Coulomb interaction ( 24 ), favorin ...

the two dashed black lines. This plateau reaches the quantum of resistanceh/e^2 , color coded white, wherehis the Planck constan ...

would be vanishingly small in the diffusive re- gime ( 35 ), demonstrates that current is flowing on the edges of the sample. Fo ...

break the U(1) spin-symmetry of the QHTI ( 23 ). Because the former mechanism would reduce resistance by opening conducting bulk ...

S. Wuet al., .Science 359 ,76–79 (2018). K. Hatsudaet al.,Sci. Adv. 4 , eaau6915 (2018). M. Kharitonov, S. Juergens, B. Trauzet ...

DRYLAND ECOLOGY Global ecosystem thresholds driven by aridity Miguel Berdugo1,2*, Manuel Delgado-Baquerizo1,3, Santiago Solivere ...

photosynthetic activity measured in situ on 809 plant species across the world (fig. S4). Plants typically reduce their leaf are ...

might be associated with the deeper root sys- tems commonly found in shrubs that make them less sensitive to seasonal droughts ( ...

remember that such changes would render these areas unable to sustain current animal and human populations, with fundamental and ...

CARBON CYCLE Major role of particle fragmentation in regulating biological sequestration of CO 2 by the oceans Nathan Briggs1,2* ...