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Nature Materials contents: March 2017 Volume 16 Number 3 pp 275 - 389

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TABLE OF CONTENTS

March 2017 Volume 16, Issue 3

Editorial
Commentary
Interview
News and Views
Progress
Letters
Articles
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Focus

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Membrane materials for separations
Membrane materials offer many practical advantages for purification and separation applications. In this Focus issue we highlight the most promising new membrane materials that offer competitive performance capabilities, and discuss how to transfer such materials and processes to industry.

Membrane materials for separations
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Editorial

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The state of flux   p275
doi:10.1038/nmat4877
The development of new membrane materials for chemical separations is progressing rapidly, and their commercial success will require a more concerted effort from academia and industry.

Commentary

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From water to organics in membrane separations   pp276 - 279
Ryan P. Lively and David S. Sholl
doi:10.1038/nmat4860
Membrane materials provide economical means to achieve various separation processes — and their capabilities for processing organic fluids look set to expand significantly.

Interview

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Membranes from academia to industry   pp280 - 282
Interview with Andrew Livingston & Richard Baker
doi:10.1038/nmat4861
Andrew Livingston (Imperial College London) and Richard Baker (Membrane Technology and Research) talk to Nature Materials about the perks and pitfalls of membrane research and development, and how activities at the new Barrer Centre might lead to next-generation separation technologies.

News and Views

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Porous materials: Lining up metal–organic frameworks   pp283 - 284
Neil R. Champness
doi:10.1038/nmat4859
A new report demonstrates an innovative approach to aligning crystallites of metal–organic frameworks such that thin films are created with oriented channels — potentially overcoming one of the major barriers to application of these highly topical materials.

See also: Article by Falcaro et al.

Spintronics: Current-switched magnetic insulator   pp284 - 285
Jörg Wunderlich
doi:10.1038/nmat4862
Exploiting the spin Hall effect acting on magnetic oxides outlines an unprecedented path towards low-power, non-volatile spintronics devices.

See also: Article by Avci et al.

Glasses: Achieving long phonon lifetimes   pp285 - 286
Maxim Goryachev and Michael E. Tobar
doi:10.1038/nmat4867
Spectral hole burning is now demonstrated with phonons in amorphous systems, leading to highly reduced phonon dissipation and, therefore, long phonon lifetimes.

See also: Article by Behunin et al.

Bottom-up synthesis: Wired metal–organic chalcogenides   pp287 - 288
Fernando Rey and José L. Jordá
doi:10.1038/nmat4850
Self-assembled transition metal–organic chalcogenide nanowires pave the way to a new family of electron conducting materials with tunable properties.

See also: Article by Yan et al.

Material Witness: Metallic hydrogen in the spotlight   p288
Philip Ball
doi:10.1038/nmat4872

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Progress

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Materials for next-generation molecularly selective synthetic membranes   pp289 - 297
William J. Koros and Chen Zhang
doi:10.1038/nmat4805
Liquid and gas purification using membrane materials permits a wide range of critical industrial processes, and here it is discussed how they might achieve molecular selectivity.

Letters

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Valley photonic crystals for control of spin and topology   pp298 - 302
Jian-Wen Dong, Xiao-Dong Chen, Hanyu Zhu, Yuan Wang and Xiang Zhang
doi:10.1038/nmat4807
A theoretically proposed photonic crystal design with valley-dependent spin-split bulk bands allows for the independent control of valley and topology in a single system.

Instrumented cardiac microphysiological devices via multimaterial three-dimensional printing   pp303 - 308
Johan U. Lind, Travis A. Busbee, Alexander D. Valentine, Francesco S. Pasqualini, Hongyan Yuan et al.
doi:10.1038/nmat4782
Heart-on-a-chip devices with integrated strain gauges for direct readout of tissue contractile strength allow for multiplexed drug-dose experiments and studies of functional maturation of cardiac tissue.

Articles

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Current-induced switching in a magnetic insulator   pp309 - 314
Can Onur Avci, Andy Quindeau, Chi-Feng Pai, Maxwell Mann, Lucas Caretta et al.
doi:10.1038/nmat4812
Spin-current-induced magnetization reversal of a perpendicularly magnetized thulium iron garnet film is reported. The spin current is driven by the current flowing through a Pt overlayer.

See also: News and Views by Wunderlich

Engineering dissipation with phononic spectral hole burning   pp315 - 321
R. O. Behunin, P. Kharel, W. H. Renninger and P. T. Rakich
doi:10.1038/nmat4819
Acoustically opaque glass can regain its transparency through coherently driven fields. Combining experiments and theory, the phononic saturation process is presented as analogous to the spectral hole burning process.

See also: News and Views by Goryachev & Tobar

Domain-wall conduction in ferroelectric BiFeO3 controlled by accumulation of charged defects   pp322 - 327
Tadej Rojac, Andreja Bencan, Goran Drazic, Naonori Sakamoto, Hana Ursic et al.
doi:10.1038/nmat4799
Domain walls in ferroelectrics are known to be conductive, but details of the precise mechanism are elusive. Atomic-scale structural and chemical characterization of domain walls in BiFeO3 now reveals a build-up of charged defects.

Entropic contributions enhance polarity compensation for CeO2(100) surfaces   pp328 - 334
Marçal Capdevila-Cortada and Núria López
doi:10.1038/nmat4804
Polar terminations are crucial to control the properties of surfaces, but they are intrinsically unstable. Entropic configurational contributions are now demonstrated to have a predominant role in the stability of CeO2(100) surface termination.

A multifunctional biphasic water splitting catalyst tailored for integration with high-performance semiconductor photoanodes   pp335 - 341
Jinhui Yang, Jason K. Cooper, Francesca M. Toma, Karl A. Walczak, Marco Favaro et al.
doi:10.1038/nmat4794
In photosynthesis the oxidation of water is a requirement for providing sufficient protons and electrons for fuel formation. A biphasic water splitting catalyst tailored for integration with high-performance semiconductor photoanodes is now reported.

Centimetre-scale micropore alignment in oriented polycrystalline metal–organic framework films via heteroepitaxial growth   pp342 - 348
Paolo Falcaro, Kenji Okada, Takaaki Hara, Ken Ikigaki, Yasuaki Tokudome et al.
doi:10.1038/nmat4815
Heteroepitaxial growth using aligned crystalline substrates allows extended metal–organic framework crystal growth oriented relative to the substrate

See also: News and Views by Champness

Hybrid metal–organic chalcogenide nanowires with electrically conductive inorganic core through diamondoid-directed assembly   pp349 - 355
Hao Yan, J. Nathan Hohman, Fei Hua Li, Chunjing Jia, Diego Solis-Ibarra et al.
doi:10.1038/nmat4823
The use of diamondoids as structure-directing agents allows the synthesis of metal–organic chalcogenide nanowires with an inorganic core having a three-atom cross-section and band-like conductivity.

See also: News and Views by Rey & Jordá

High operational and environmental stability of high-mobility conjugated polymer field-effect transistors through the use of molecular additives   pp356 - 362
Mark Nikolka, Iyad Nasrallah, Bradley Rose, Mahesh Kumar Ravva, Katharina Broch et al.
doi:10.1038/nmat4785
Small molecular additives incorporated into films of conjugate polymers are shown to fill the voids present in the polymer network. As a result, the stability of organic transistors based on these materials is significantly improved.

Reducing the efficiency–stability–cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells   pp363 - 369
Derya Baran, Raja Shahid Ashraf, David A. Hanifi, Maged Abdelsamie, Nicola Gasparini et al.
doi:10.1038/nmat4797
Ternary organic blends using two non-fullerene acceptors are shown to improve the efficiency and stability of low-cost solar cells based on P3HT and of high-performance photovoltaic devices based on low-bandgap donor polymers.

Collagen intrafibrillar mineralization as a result of the balance between osmotic equilibrium and electroneutrality   pp370 - 378
Li-na Niu, Sang Eun Jee, Kai Jiao, Lige Tonggu, Mo Li et al.
doi:10.1038/nmat4789
A new model for collagen intrafibrillar mineralization shows the need for a balance between osmotic equilibrium and electroneutrality to establish Gibbs–Donnan equilibrium.

MicroRNA-21 preserves the fibrotic mechanical memory of mesenchymal stem cells   pp379 - 389
Chen Xi Li, Nilesh P. Talele, Stellar Boo, Anne Koehler, Ericka Knee-Walden et al.
doi:10.1038/nmat4780
Mesenchymal stem cells primed on soft silicone substrates suppress fibrogenesis and are desensitized against subsequent mechanical activation in vitro and in vivo.

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