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Nature Materials

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https://www.readbyqxmd.com/read/30397313/ferroelectrically-tunable-magnetic-skyrmions-in-ultrathin-oxide-heterostructures
#1
Lingfei Wang, Qiyuan Feng, Yoonkoo Kim, Rokyeon Kim, Ki Hoon Lee, Shawn D Pollard, Yeong Jae Shin, Haibiao Zhou, Wei Peng, Daesu Lee, Wenjie Meng, Hyunsoo Yang, Jung Hoon Han, Miyoung Kim, Qingyou Lu, Tae Won Noh
Magnetic skyrmions are topologically protected whirling spin texture. Their nanoscale dimensions, topologically protected stability and solitonic nature, together are promising for future spintronics applications. To translate these compelling features into practical spintronic devices, a key challenge lies in achieving effective control of skyrmion properties, such as size, density and thermodynamic stability. Here, we report the discovery of ferroelectrically tunable skyrmions in ultrathin BaTiO3 /SrRuO3 bilayer heterostructures...
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30397312/molecular-sieving-of-ethylene-from-ethane-using-a-rigid-metal-organic-framework
#2
Rui-Biao Lin, Libo Li, Hao-Long Zhou, Hui Wu, Chaohui He, Shun Li, Rajamani Krishna, Jinping Li, Wei Zhou, Banglin Chen
There are great challenges in developing efficient adsorbents to replace the currently used and energy-intensive cryogenic distillation processes for olefin/paraffin separation, owing to the similar physical properties of the two molecules. Here we report an ultramicroporous metal-organic framework [Ca(C4 O4 )(H2 O)], synthesized from calcium nitrate and squaric acid, that possesses rigid one-dimensional channels. These apertures are of a similar size to ethylene molecules, but owing to the size, shape and rigidity of the pores, act as molecular sieves to prevent the transport of ethane...
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30397311/solving-mazes-with-single-molecule-dna-navigators
#3
Jie Chao, Jianbang Wang, Fei Wang, Xiangyuan Ouyang, Enzo Kopperger, Huajie Liu, Qian Li, Jiye Shi, Lihua Wang, Jun Hu, Lianhui Wang, Wei Huang, Friedrich C Simmel, Chunhai Fan
Molecular devices with information-processing capabilities hold great promise for developing intelligent nanorobotics. Here we demonstrate a DNA navigator system that can perform single-molecule parallel depth-first search on a ten-vertex rooted tree defined on a two-dimensional DNA origami platform. Pathfinding by the DNA navigators exploits a localized strand exchange cascade, which is initiated at a unique trigger site on the origami with subsequent automatic progression along paths defined by DNA hairpins containing a universal traversal sequence...
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30397310/whirling-spins-with-a-ferroelectric
#4
Evgeny Y Tsymbal, Christos Panagopoulos
No abstract text is available yet for this article.
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30397309/an-efficient-nanosieve
#5
Anastasiya Bavykina, Jorge Gascon
No abstract text is available yet for this article.
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30397308/epitaxial-growth-of-ultraflat-stanene-with-topological-band-inversion
#6
Jialiang Deng, Bingyu Xia, Xiaochuan Ma, Haoqi Chen, Huan Shan, Xiaofang Zhai, Bin Li, Aidi Zhao, Yong Xu, Wenhui Duan, Shou-Cheng Zhang, Bing Wang, J G Hou
Two-dimensional (2D) topological materials, including quantum spin/anomalous Hall insulators, have attracted intense research efforts owing to their promise for applications ranging from low-power electronics and high-performance thermoelectrics to fault-tolerant quantum computation. One key challenge is to fabricate topological materials with a large energy gap for room-temperature use. Stanene-the tin counterpart of graphene-is a promising material candidate distinguished by its tunable topological states and sizeable bandgap...
November 5, 2018: Nature Materials
https://www.readbyqxmd.com/read/30390040/author-correction-antiviral-agents-targeting-vesicle-size
#7
Zhe Fei, Pei-Yong Shi
In the version of this News & Views originally published, 'amphipathic' was incorrectly spelled 'amphiphatic' in the standfirst. This has been corrected in the online versions of the News & Views.
November 2, 2018: Nature Materials
https://www.readbyqxmd.com/read/30382194/author-correction-injectable-tissue-integrating-networks-from-recombinant-polypeptides-with-tunable-order
#8
Stefan Roberts, Tyler S Harmon, Jeffrey L Schaal, Vincent Miao, Kan Jonathan Li, Andrew Hunt, Yi Wen, Terrence G Oas, Joel H Collier, Rohit V Pappu, Ashutosh Chilkoti
In the version of this Article originally published, one of the authors' names was incorrectly given as Jeffery Schaal; it should have been Jeffrey L. Schaal. This has been corrected in all versions of the Article.
October 31, 2018: Nature Materials
https://www.readbyqxmd.com/read/30374204/hybrid-photoelectrochemical-and-photovoltaic-cells-for-simultaneous-production-of-chemical-fuels-and-electrical-power
#9
Gideon Segev, Jeffrey W Beeman, Jeffery B Greenblatt, Ian D Sharp
Harnessing solar energy to drive photoelectrochemical reactions is widely studied for sustainable fuel production and versatile energy storage over different timescales. However, the majority of solar photoelectrochemical cells cannot drive the overall photosynthesis reactions without the assistance of an external power source. A device for simultaneous and direct production of renewable fuels and electrical power from sunlight is now proposed. This hybrid photoelectrochemical and photovoltaic device allows tunable control over the branching ratio between two high-value products of solar energy conversion, requires relatively simple modification to existing photovoltaic technologies, and circumvents the photocurrent mismatches that lead to significant loss in tandem photoelectrochemical systems comprising chemically stable photoelectrodes...
October 29, 2018: Nature Materials
https://www.readbyqxmd.com/read/30374203/the-role-of-defects-and-excess-surface-charges-at-finite-temperature-for-optimizing-oxide-photoabsorbers
#10
Matteo Gerosa, Francois Gygi, Marco Govoni, Giulia Galli
Computational screening of materials for solar to fuel conversion technologies has mostly focused on bulk properties, thus neglecting the structure and chemistry of surfaces and interfaces with water. We report a finite temperature study of WO3 , a promising anode for photoelectrochemical cells, carried out using first-principles molecular dynamics simulations coupled with many-body perturbation theory. We identified three major factors determining the chemical reactivity of the material interfaced with water: the presence of surface defects, the dynamics of excess charge at the surface, and finite temperature fluctuations of the surface electronic orbitals...
October 29, 2018: Nature Materials
https://www.readbyqxmd.com/read/30374202/biomaterials-and-engineered-microenvironments-to-control-yap-taz-dependent-cell-behaviour
#11
REVIEW
Giovanna Brusatin, Tito Panciera, Alessandro Gandin, Anna Citron, Stefano Piccolo
Mechanical signals are increasingly recognized as overarching regulators of cell behaviour, controlling stemness, organoid biology, tissue development and regeneration. Moreover, aberrant mechanotransduction is a driver of disease, including cancer, fibrosis and cardiovascular defects. A central question remains how cells compute a host of biomechanical signals into meaningful biological behaviours. Biomaterials and microfabrication technologies are essential to address this issue. Here we review a large body of evidence that connects diverse biomaterial-based systems to the functions of YAP/TAZ, two highly related mechanosensitive transcriptional regulators...
October 29, 2018: Nature Materials
https://www.readbyqxmd.com/read/30374201/a-tunable-magnetic-metamaterial-based-on-the-dipolar-four-state-potts-model
#12
D Louis, D Lacour, M Hehn, V Lomakin, T Hauet, F Montaigne
Metamaterials, tunable artificial materials, are useful playgrounds to investigate magnetic systems. So far, artificial Ising spin systems have revealed features such as emergent magnetic monopoles1,2 and charge fragmentation3 . Here we present a metasystem composed of a lattice of dipolarly coupled nanomagnets. The magnetic spin of each nanomagnet is constrained to lie along a body diagonal, which yields four possible spin states. We show that the magnetic ordering of this metasystem (antiferromagnetic, ferromagnetic or spin ice like) is determined by the spin states orientation relative to the underlying lattice...
October 29, 2018: Nature Materials
https://www.readbyqxmd.com/read/30349032/spatial-confinement-downsizes-the-inflammatory-response-of-macrophages
#13
Nikhil Jain, Viola Vogel
Macrophages respond to chemical/metabolic and physical stimuli, but their effects cannot be readily decoupled in vivo during pro-inflammatory activation. Here, we show that preventing macrophage spreading by spatial confinement, as imposed by micropatterning, microporous substrates or cell crowding, suppresses late lipopolysaccharide (LPS)-activated transcriptional programs (biomarkers IL-6, CXCL9, IL-1β, and iNOS) by mechanomodulating chromatin compaction and epigenetic alterations (HDAC3 levels and H3K36-dimethylation)...
October 22, 2018: Nature Materials
https://www.readbyqxmd.com/read/30349031/a-rhombohedral-ferroelectric-phase-in-epitaxially-strained-hf-0-5-zr-0-5-o-2-thin-films
#14
Yingfen Wei, Pavan Nukala, Mart Salverda, Sylvia Matzen, Hong Jian Zhao, Jamo Momand, Arnoud S Everhardt, Guillaume Agnus, Graeme R Blake, Philippe Lecoeur, Bart J Kooi, Jorge Íñiguez, Brahim Dkhil, Beatriz Noheda
Hafnia-based thin films are a favoured candidate for the integration of robust ferroelectricity at the nanoscale into next-generation memory and logic devices. This is because their ferroelectric polarization becomes more robust as the size is reduced, exposing a type of ferroelectricity whose mechanism still remains to be understood. Thin films with increased crystal quality are therefore needed. We report the epitaxial growth of Hf0.5 Zr0.5 O2 thin films on (001)-oriented La0.7 Sr0.3 MnO3 /SrTiO3 substrates...
October 22, 2018: Nature Materials
https://www.readbyqxmd.com/read/30323336/phase-selective-synthesis-of-1t-mos-2-monolayers-and-heterophase-bilayers
#15
Lina Liu, Juanxia Wu, Liyuan Wu, Meng Ye, Xiaozhi Liu, Qian Wang, Siyao Hou, Pengfei Lu, Lifei Sun, Jingying Zheng, Lei Xing, Lin Gu, Xiangwei Jiang, Liming Xie, Liying Jiao
Two-dimensional (2D) MoS2 , which has great potential for optoelectronic and other applications, is thermodynamically stable and hence easily synthesized in its semiconducting 2H phase. In contrast, growth of its metastable 1T and 1T' phases is hampered by their higher formation energy. Here we use theoretical calculations to design a potassium (K)-assisted chemical vapour deposition method for the phase-selective growth of 1T' MoS2 monolayers and 1T'/2H heterophase bilayers. This is realized by tuning the concentration of K in the growth products to invert the stability of the 1T' and 2H phases...
October 15, 2018: Nature Materials
https://www.readbyqxmd.com/read/30323334/injectable-tissue-integrating-networks-from-recombinant-polypeptides-with-tunable-order
#16
Stefan Roberts, Tyler S Harmon, Jeffrey L Schaal, Vincent Miao, Kan Jonathan Li, Andrew Hunt, Yi Wen, Terrence G Oas, Joel H Collier, Rohit V Pappu, Ashutosh Chilkoti
Emergent properties of natural biomaterials result from the collective effects of nanoscale interactions among ordered and disordered domains. Here, using recombinant sequence design, we have created a set of partially ordered polypeptides to study emergent hierarchical structures by precisely encoding nanoscale order-disorder interactions. These materials, which combine the stimuli-responsiveness of disordered elastin-like polypeptides and the structural stability of polyalanine helices, are thermally responsive with tunable thermal hysteresis and the ability to reversibly form porous, viscoelastic networks above threshold temperatures...
October 15, 2018: Nature Materials
https://www.readbyqxmd.com/read/30315212/publisher-correction-large-electrostrictive-response-in-lead-halide-perovskites
#17
Bo Chen, Tao Li, Qingfeng Dong, Edoardo Mosconi, Jingfeng Song, Zhaolai Chen, Yehao Deng, Ye Liu, Stephen Ducharme, Alexei Gruverman, Filippo De Angelis, Jinsong Huang
In the version of this Article originally published, the y axis of Fig. 1c was incorrectly labelled 'S (%)'; it should have been '-S (%)'. Also, the link for the Supplementary Video was missing from the online version of the Article. These errors have now been corrected.
October 12, 2018: Nature Materials
https://www.readbyqxmd.com/read/30315211/publisher-correction-materials-challenges-for-the-starshot-lightsail
#18
Harry A Atwater, Artur R Davoyan, Ognjen Ilic, Deep Jariwala, Michelle C Sherrott, Cora M Went, William S Whitney, Joeson Wong
In the version of this Perspective originally published, Fig. 1 was missing the following credit line from the caption: 'Background image from ESA/Hubble (A. Fujii).' This has now been corrected in the online versions of the Perspective.
October 12, 2018: Nature Materials
https://www.readbyqxmd.com/read/30297813/programmed-assembly-of-synthetic-protocells-into-thermoresponsive-prototissues
#19
Pierangelo Gobbo, Avinash J Patil, Mei Li, Robert Harniman, Wuge H Briscoe, Stephen Mann
Although several new types of synthetic cell-like entities are now available, their structural integration into spatially interlinked prototissues that communicate and display coordinated functions remains a considerable challenge. Here we describe the programmed assembly of synthetic prototissue constructs based on the bio-orthogonal adhesion of a spatially confined binary community of protein-polymer protocells, termed proteinosomes. The thermoresponsive properties of the interlinked proteinosomes are used collectively to generate prototissue spheroids capable of reversible contractions that can be enzymatically modulated and exploited for mechanochemical transduction...
October 8, 2018: Nature Materials
https://www.readbyqxmd.com/read/30353091/a-century-of-advances-in-prostheses
#20
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
November 2018: Nature Materials
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