Wednesday, March 29, 2017

Nature Materials contents: April 2017 Volume 16 Number 4 pp 391 - 497

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Nature Materials


April 2017 Volume 16, Issue 4

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The quantum game   p391
With the launch of the Quantum Technologies Flagship, the European Union is looking to become a major player in the upcoming quantum revolution, reaping benefits both for technology development and wealth creation for the European society.

News and Views


Chiral ferromagnetic fluids: Let's twist again   pp392 - 393
Paul Sutcliffe
The magnetization in a chiral ferromagnetic fluid can be twisted and linked to form a stable three-dimensional topological soliton known as a hopfion.

See also: Article by Ackerman & Smalyukh

Material witness: Gene memories   p393
Philip Ball

Biomedical engineering: In vitro amniogenesis   pp394 - 395
Martin Pera
Using a biomimetic culture platform to replicate the early biophysical environment of a developing embryo, human pluripotent stem cells can be directed towards amnion formation in vitro.

See also: Letter by Shao et al.

Organic electronics: Battery-like artificial synapses   pp396 - 397
J. Joshua Yang and Qiangfei Xia
Borrowing the operating principles of a battery, a three-terminal organic switch has been developed on a flexible plastic substrate. The device consumes very little power and can be used as an artificial synapse for brain-inspired computing.

See also: Letter by van de Burgt et al.

Spectroscopy: Mapping spins in flatland   pp397 - 398
Igor Aharonovich and Fedor Jelezko
Nuclear quadrupole resonance spectroscopy is used to map the properties of atomically thin hexagonal boron nitride, with the help of the nitrogen–vacancy colour centres engineered in a diamond layer placed under the 2D material.

Quantum optics: A new way to correlate photons   pp398 - 399
Fabrice P. Laussy
Resonance fluorescence from a semiconductor quantum dot unravels a rich two-photon landscape of correlations, and may be used to test their quantum nonlocality.

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Modelling heterogeneous interfaces for solar water splitting   pp401 - 408
Tuan Anh Pham, Yuan Ping and Giulia Galli
Hydrogen generation from water and sunlight offers a promising way to produce carbon-free energy. Recent progress in predicting properties of heterogeneous interfaces for solar water splitting using first-principles approaches is now reviewed.



Universal lower limit on vortex creep in superconductors   pp409 - 413
S. Eley, M. Miura, B. Maiorov and L. Civale
A very slow vortex creep in BaFe2(As0.67P0.33)2 films is found experimentally. The authors also claim the existence of a universal lower limit on vortex creep for any superconductor.

A non-volatile organic electrochemical device as a low-voltage artificial synapse for neuromorphic computing   pp414 - 418
Yoeri van de Burgt, Ewout Lubberman, Elliot J. Fuller, Scott T. Keene, Grégorio C. Faria et al.
A neuromorphic device based on the stable electrochemical fine-tuning of the conductivity of an organic ionic/electronic conductor is realized. These devices show high linearity, low noise and extremely low switching voltage.

See also: News and Views by Yang & Xia

Self-organized amniogenesis by human pluripotent stem cells in a biomimetic implantation-like niche   pp419 - 425
Yue Shao, Kenichiro Taniguchi, Katherine Gurdziel, Ryan F. Townshend, Xufeng Xue et al.
The control of biophysical cues during the culture of human pluripotent stem cells on biomaterial substrates can be used to replicate the in vivo amniogenic environment and direct in vitro generation of early human amniotic tissue.

See also: News and Views by Pera

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Static three-dimensional topological solitons in fluid chiral ferromagnets and colloids   pp426 - 432
Paul J. Ackerman and Ivan I. Smalyukh
Three-dimensional topological solitons are realized in a fluid chiral ferromagnet formed by colloidal dispersions of magnetic nanoplates.

See also: News and Views by Sutcliffe

Topologically protected bound states in photonic parity–time-symmetric crystals   pp433 - 438
S. Weimann, M. Kremer, Y. Plotnik, Y. Lumer, S. Nolte et al.
Topologically protected bound states in parity–time-symmetric non-Hermitian photonic lattices are theoretically predicted and experimentally demonstrated.

Slip-activated surface creep with room-temperature super-elongation in metallic nanocrystals   pp439 - 445
Li Zhong, Frederic Sansoz, Yang He, Chongmin Wang, Ze Zhang et al.
In situ atomic-scale imaging of deformation in silver nanocrystals reveals that it is possible to achieve deformability and high strength, attributed to a coupling mechanism between crystal slip and surface diffusional creep.

Biredox ionic liquids with solid-like redox density in the liquid state for high-energy supercapacitors   pp446 - 453
Eléonore Mourad, Laura Coustan, Pierre Lannelongue, Dodzi Zigah, Ahmad Mehdi et al.
Electrochemical storage devices in the liquid state are promising but they suffer from low redox species density. An approach based on biredox ionic liquids now demonstrates bulk-like redox density compatible with supercapacitor applications.

Oxygen vacancies enhance pseudocapacitive charge storage properties of MoO3–x   pp454 - 460
Hyung-Seok Kim, John B. Cook, Hao Lin, Jesse S. Ko, Sarah H. Tolbert et al.
Capacitive energy storage is an attractive alternative to batteries, but electrochemical capacitors are limited by their low energy density. Oxygen vacancies are now shown to enhance the electrochemical properties of MoO3–x.

Structure of a model TiO2 photocatalytic interface   pp461 - 466
H. Hussain, G. Tocci, T. Woolcot, X. Torrelles, C. L. Pang et al.
The interaction of water with TiO2 is crucial for applications such as photocatalytic water splitting. The interfacial structure between water and rutile TiO2 is now shown to consist of an array of hydroxyl molecules with water in the second layer.

Temporal mapping of photochemical reactions and molecular excited states with carbon specificity   pp467 - 473
K. Wang, P. Murahari, K. Yokoyama, J. S. Lord, F. L. Pratt et al.
Laser-excited muon pump–probe spin spectroscopy and analysis of avoided level crossing resonances are used to probe the time evolution of the chemical reactivity of individual carbon atoms in TIPS-pentacene after light excitation.

Solution-based electrical doping of semiconducting polymer films over a limited depth   pp474 - 480
Vladimir A. Kolesov, Canek Fuentes-Hernandez, Wen-Fang Chou, Naoya Aizawa, Felipe A. Larrain et al.
A solution process for the diffusion of dopants in organic semiconducting films over a limited depth has been developed. The method is applied to single polymers and donor–acceptor mixtures, and for the realization of single-layer solar cells.

Two-dimensional assemblies from crystallizable homopolymers with charged termini   pp481 - 488
Xiaoming He, Ming-Siao Hsiao, Charlotte E. Boott, Robert L. Harniman, Ali Nazemi et al.
Uniform, hierarchical 2D nanostructures with controlled shapes can be prepared from homopolymers with charged end-groups using a crystallization-driven assembly process.

Designer vaccine nanodiscs for personalized cancer immunotherapy   pp489 - 496
Rui Kuai, Lukasz J. Ochyl, Keith S. Bahjat, Anna Schwendeman and James J. Moon
High-density lipoprotein nanodiscs loaded with immunostimulatory biomolecules can target draining lymph nodes for cancer vaccination.

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Addendum: Multiscale metallic metamaterials   p497
Xiaoyu Zheng, William Smith, Julie Jackson, Bryan Moran, Huachen Cui et al.

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