Tuesday, April 25, 2017

Nature Materials contents: May 2017 Volume 16 Number 5 pp 499 - 597

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Nature Materials

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May 2017 Volume 16, Issue 5

News and Views
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A molecular jigsaw puzzle   p499
Convergent efforts of researchers from different fields aim to control spin transport in molecules and develop nanoscale spintronic devices with improved performance or new functionalities.

News and Views


White light-emitting diodes: Stabilizing colour and intensity   pp500 - 501
Philippe F. Smet and Jonas J. Joos
Thermally activated defects in a blue-emitting phosphor can enhance energy transfer to the activator, and compensate for thermal quenching.

See also: Article by Kim et al.

Porous materials: Look but don't touch   pp501 - 502
Ben Slater and Sanliang Ling
By combining an electron-counting camera with low-energy transmission electron microscopy, it is possible to directly image the surface structure of delicate metal–organic framework crystals and their coherent interfaces.

See also: Letter by Zhu et al.

Material witness: Is this holy relic preserved?   p503
Philip Ball

Organic photovoltaics: Pushing the knowledge of interfaces   pp503 - 505
Natalie Banerji
The use of a spectroscopy technique called pump–push–probe electro-absorption provides insight into the energetic landscape of nanostructured donor–acceptor interfaces in bulk-heterojunction organic solar cells.

See also: Article by Jakowetz et al.

Spintronics: The molecular way   pp505 - 506
Andrea Cornia and Pierre Seneor
Molecular spintronics is an interdisciplinary field at the interface between organic spintronics, molecular magnetism, molecular electronics and quantum computing, which is advancing fast and promises large technological payoffs.

Nature Materials
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Activating the molecular spinterface   pp507 - 515
Mirko Cinchetti, V. Alek Dediu and Luis E. Hueso
This Perspective discusses the spin-dependent properties emerging at the interfaces of molecular and inorganic materials, and describes possible future developments for spin-based technologies.



A magnetic heterostructure of topological insulators as a candidate for an axion insulator   pp516 - 521
M. Mogi, M. Kawamura, R. Yoshimi, A. Tsukazaki, Y. Kozuka, N. Shirakawa, K. S. Takahashi, M. Kawasaki and Y. Tokura
An engineered topological insulator-based heterostructure is reported to show transport properties consistent with the realization of an axion insulator.

Graded bandgap perovskite solar cells   pp522 - 525
Onur Ergen, S. Matt Gilbert, Thang Pham, Sally J. Turner, Mark Tian Zhi Tan, Marcus A. Worsley and Alex Zettl
The use of monolayers of hexagonal boron nitride as the cationic diffusion barrier and graphene aerogel mixed with spiro-OMeTAD as the hole transport layer allows the fabrication of graded bandgap perovskite solar cells with high efficiency.

Selective nitrogen capture by porous hybrid materials containing accessible transition metal ion sites   pp526 - 531
Ji Woong Yoon, Hyunju Chang, Seung-Joon Lee, Young Kyu Hwang, Do-Young Hong, Su-Kyung Lee, Ji Sun Lee, Seunghun Jang, Tae-Ung Yoon, Kijeong Kwac, Yousung Jung, Renjith S. Pillai, Florian Faucher, Alexandre Vimont, Marco Daturi, Gérard Férey, Christian Serre, Guillaume Maurin, Youn-Sang Bae and Jong-San Chang
Mesoporous metal–organic frameworks containing unsaturated Cr(III) sites are able to thermodynamically and selectively capture nitrogen from mixtures with oxygen and methane.

Unravelling surface and interfacial structures of a metal–organic framework by transmission electron microscopy   pp532 - 536
Yihan Zhu, Jim Ciston, Bin Zheng, Xiaohe Miao, Cory Czarnik, Yichang Pan, Rachid Sougrat, Zhiping Lai, Chia-En Hsiung, Kexin Yao, Ingo Pinnau, Ming Pan and Yu Han
The operational conditions used for electron microscopy can limit the insight that can be gained from fragile material samples. It is shown here how high-resolution TEM analysis of delicate MOFs can be achieved.

See also: News and Views by Slater & Ling

Distance-dependent magnetic resonance tuning as a versatile MRI sensing platform for biological targets   pp537 - 542
Jin-sil Choi, Soojin Kim, Dongwon Yoo, Tae-Hyun Shin, Hoyoung Kim, Muller D. Gomes, Sun Hee Kim, Alexander Pines and Jinwoo Cheon
By pairing a paramagnetic enhancer with a superparamagnetic quencher, their distance-dependent interaction can be applied to image biological processes using MRI.



A zero-thermal-quenching phosphor   pp543 - 550
Yoon Hwa Kim, Paulraj Arunkumar, Bo Young Kim, Sanjith Unithrattil, Eden Kim, Su-Hyun Moon, Jae Young Hyun, Ki Hyun Kim, Donghwa Lee, Jong-Sook Lee and Won Bin Im
A blue-emitting phosphor without thermal quenching is reported. The emission losses at high temperatures are compensated by a counter mechanism, originating in energy transfer between electron–hole pairs and thermally activated defect levels.

See also: News and Views by Smet & Joos

Visualizing excitations at buried heterojunctions in organic semiconductor blends   pp551 - 557
Andreas C. Jakowetz, Marcus L. Böhm, Aditya Sadhanala, Sven Huettner, Akshay Rao and Richard H. Friend
A pump–push–probe time-resolved technique is developed to characterize the dynamics of photoexcitations at buried, disordered interfaces. Applied to organic bulk heterojunctions, the method provides insight on charge separation in photovoltaic films.

See also: News and Views by Banerji

Dynamic restructuring drives catalytic activity on nanoporous gold-silver alloy catalysts   pp558 - 564
Branko Zugic, Lucun Wang, Christian Heine, Dmitri N. Zakharov, Barbara A. J. Lechner, Eric A. Stach, Juergen Biener, Miquel Salmeron, Robert J. Madix and Cynthia M. Friend
Dynamic restructuring behaviour and composition changes in bimetallic and nanoporous gold–silver alloys correlate to catalytic activity.

Three-dimensional imaging of dislocation dynamics during the hydriding phase transformation   pp565 - 571
A. Ulvestad, M. J. Welland, W. Cha, Y. Liu, J. W. Kim, R. Harder, E. Maxey, J. N. Clark, M. J. Highland, H. You, P. Zapol, S. O. Hruszkewycz and G. B. Stephenson
Coherent diffractive imaging during hydriding of palladium nanocrystals reveals that phase nucleation begins after dislocation nucleation at the phase boundary for large particles. The hydrogen-rich phase resembles a spherical cap.

Negating interfacial impedance in garnet-based solid-state Li metal batteries   pp572 - 579
Xiaogang Han, Yunhui Gong, Kun (Kelvin) Fu, Xingfeng He, Gregory T. Hitz, Jiaqi Dai, Alex Pearse, Boyang Liu, Howard Wang, Gary Rubloff, Yifei Mo, Venkataraman Thangadurai, Eric D. Wachsman and Liangbing Hu
Garnet-type electrolytes are attractive for lithium metal batteries due to their high ionic conductivity. A strategy to decrease interfacial impedance between a lithium metal anode and garnet electrolyte is found promising for all-solid-state batteries.

Evidence for anionic redox activity in a tridimensional-ordered Li-rich positive electrode β-Li2IrO3   pp580 - 586
Paul E. Pearce, Arnaud J. Perez, Gwenaelle Rousse, Mathieu Saubanère, Dmitry Batuk, Dominique Foix, Eric McCalla, Artem M. Abakumov, Gustaaf Van Tendeloo, Marie-Liesse Doublet and Jean-Marie Tarascon
For high-capacity electrodes with anionic redox, the importance of structural dimensionality has not been elucidated. The possibility of triggering anionic redox activity in a tridimensional-ordered Li-rich positive electrode is now demonstrated.

Endocytic reawakening of motility in jammed epithelia   pp587 - 596
Chiara Malinverno, Salvatore Corallino, Fabio Giavazzi, Martin Bergert, Qingsen Li, Marco Leoni, Andrea Disanza, Emanuela Frittoli, Amanda Oldani, Emanuele Martini, Tobias Lendenmann, Gianluca Deflorian, Galina V. Beznoussenko, Dimos Poulikakos, Kok Haur Ong, Marina Uroz, Xavier Trepat, Dario Parazzoli, Paolo Maiuri, Weimiao Yu, Aldo Ferrari, Roberto Cerbino and Giorgio Scita
Increased cellular expression of RAB5A, an important regulator of endocytic processes, brings epithelial cells from a jammed state to coordinated motion, and can facilitate wound closure, gastrulation and migration in constrained environments.



Erratum: Generation of subnanometric platinum with high stability during transformation of a 2D zeolite into 3D   p597
Lichen Liu, Urbano Díaz, Raul Arenal, Giovanni Agostini, Patricia Concepción and Avelino Corma

See also: Article by Liu et al.

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