Nature Materials contents: January 2018 Volume 17 Number 1 pp 1-103

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Advertisement npj Flexible Electronics is a new open access journal that is now open for submissions. The journal publishes the latest high-quality breakthrough research and developments in all aspects related to interdisciplinary flexible electronics topics.   Sign up for article e-alerts>>> TABLE OF CONTENTS January 2018 Volume 17, Issue 1 Editorial Commentary News and Views Correction Letter Articles Corrigenda   Advertisement     npj Microgravity is a new open access journal specifically dedicated to publishing research which enables space exploration and research that is enabled by spaceflight and ground-based spaceflight analogues. npj Microgravity is published in cooperation the Biodesign Institute at Arizona State University, and is part of the Nature Partner Journals series. Find out more>>>   Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement We are pleased to share that highly ranked international speakers have already confirmed their attendance to NANO2018. Find out more: Plenary Speakers & Keynote Speakers. You are invited to submit your abstract for Oral or Poster Presentation on 12 themes. Find out more: Call for Papers  Submit your abstract for NANO2018 today! (Deadline: 1 February 2018)   Editorial Top A cure for mobility problems   p1 doi:10.1038/nmat5061 As the electronic performance of organic semiconductors and other emergent materials improves, researchers call for attention in extracting charge mobility values from field-effect transistors.   Commentary Top Critical assessment of charge mobility extraction in FETs   pp2 - 7 Hyun Ho Choi, Kilwon Cho, C. Daniel Frisbie, Henning Sirringhaus and Vitaly Podzorov doi:10.1038/nmat5035 Mobility is an important charge-transport parameter in organic, inorganic and hybrid semiconductors. We outline some of the common pitfalls of mobility extraction from field-effect transistor (FET) measurements and propose practical recommendations to avoid reporting erroneous mobilities in publications.   News and Views Top Colloidal nanocrystals: Virtues of defects   pp8 - 9 Frank Wise doi:10.1038/nmat5056 Defects in mercury telluride quantum dots can be exploited to achieve amplified spontaneous emission under continuous-wave optical pumping at ultralow power levels. See also: Article by Geiregat et al. Colloidal nanocrystals: Electrifying quantum dots for lasers   pp9 - 10 Ifor Samuel doi:10.1038/nmat5040 Compositional grading of colloidal quantum dots enables electrically driven amplification of light, bringing electrically driven lasers from these materials very close. See also: Article by Lim et al. Atomic segregation: Activity at the surface   pp10 - 12 Simon P. Ringer doi:10.1038/nmat5058 In situ transmission electron microscopy resolves atomic structures and dislocation dynamics of surface segregation, providing insights that open a pathway to new advances in interface engineering. See also: Article by Zou et al. Material witness: How does it feel?   p12 Philip Ball doi:10.1038/nmat5062   Metallurgy: Printing steels   pp13 - 14 Iain Todd doi:10.1038/nmat5042 Additive manufacturing has been used to fabricate a common stainless steel, which imparts a unique microstructure to this material, making it stronger and more ductile than that produced with conventional methods. See also: Article by Wang et al. Colloids: Chiral interactions in liquid crystals   pp14 - 15 Karthik Nayani, Young-Ki Kim and Nicholas L. Abbott doi:10.1038/nmat5055 The chirality of colloids dispersed in achiral liquid crystals shapes colloidal dynamics and interactions, giving rise to chiral supramolecular assemblies and attractive or repulsive colloidal motions. See also: Article by Yuan et al. Nature Materials JOBS of the week Shenzhen University International Forum for Young Scientists(2017) Shenzhen University PhD and Postdoc Positions in Nanoscience and Biophysics Ludwig-Maximilians-Universität (LMU) in Munich Assistant Professor, Experimental / Biomaterials / Condensed Matter (Tenure-Track) The George Mason University Director of the Advanced Light Source Advanced Light Source Postdoctoral fellow Karolinska Institutet (KI) More Science jobs from Nature Materials EVENT SCI-ICMSNT 2018 : 2018 3rd International Conference on Materials Science and Nanotechnology 29.03.18 Chengdu, China More science events from Correction Top Correction   p15 doi:10.1038/nmat5060   Letter Top Plating and stripping calcium in an organic electrolyte   pp16 - 20 Da Wang, Xiangwen Gao, Yuhui Chen, Liyu Jin, Christian Kuss et al. doi:10.1038/nmat5036 Although multivalent cation batteries based on magnesium, calcium or aluminium are technologically attractive, the metal anode still represents a challenge. It is now demonstrated that significant quantities of calcium can be plated and stripped at room temperature with low polarization.   Advertisement npj Quantum Materials is a new open access journal that is now open for submissions. The journal publishes broad coverage of quantum materials, their fundamental properties, fabrication and applications.   Sign up for article e-alerts>>>   Articles Top Ubiquitous formation of bulk Dirac cones and topological surface states from a single orbital manifold in transition-metal dichalcogenides   pp21 - 28 M. S. Bahramy, O. J. Clark, B.-J. Yang, J. Feng, L. Bawden et al. doi:10.1038/nmat5031 Type-I and type-II bulk Dirac cones and ladders of topological surface states are shown to form in six different transition-metal dichalcogenides.   Spontaneous exchange bias formation driven by a structural phase transition in the antiferromagnetic material   pp28 - 35 A. Migliorini, B. Kuerbanjiang, T. Huminiuc, D. Kepaptsoglou, M. Muñoz et al. doi:10.1038/nmat5030 The exchange bias effect in IrMn/FeCo is driven by a phase transition in the IrMn layer at room temperature, and occurs without the typical field-cooling sequence across the antiferromagnet Neel temperature.   Continuous-wave infrared optical gain and amplified spontaneous emission at ultralow threshold by colloidal HgTe quantum dots   pp35 - 42 Pieter Geiregat, Arjan J. Houtepen, Laxmi Kishore Sagar, Ivan Infante, Felipe Zapata et al. doi:10.1038/nmat5000 Stimulated emission under continuous-wave excitation from mercury telluride quantum dots at very low thresholds (compatible with electrical injection) is achieved by exploiting surface traps that render the quantum dots into four-level systems. See also: News and Views by Wise Optical gain in colloidal quantum dots achieved with direct-current electrical pumping   pp42 - 49 Jaehoon Lim, Young-Shin Park and Victor I. Klimov doi:10.1038/nmat5011 Core/shell type-I semiconductor nanocrystals with compositionally graded shell and embedded in a current-focusing device architecture reach population inversion, a condition required for lasing, when excited with direct current. See also: News and Views by Samuel Temporary formation of highly conducting domain walls for non-destructive read-out of ferroelectric domain-wall resistance switching memories   pp49 - 56 Jun Jiang, Zi Long Bai, Zhi Hui Chen, Long He, David Wei Zhang et al. doi:10.1038/nmat5028 An in-plane memory device based on multidomain BiFeO3 thin films is reported. Highly conductive domain walls appear only during the application of a read-out field, a non-destructive process that reduces accumulation of mobile defects on the walls.   Dislocation nucleation facilitated by atomic segregation   pp56 - 63 Lianfeng Zou, Chaoming Yang, Yinkai Lei, Dmitri Zakharov, Jorg M. K. Wiezorek et al. doi:10.1038/nmat5034 In situ transmission electron microscopy combined with theory modelling reveals that surface segregation in CuAu solid solution generates misfit dislocations, providing atomistic mechanisms of dislocation nucleation and dynamics at heterointerfaces. See also: News and Views by Ringer Additively manufactured hierarchical stainless steels with high strength and ductility   pp63 - 71 Y. Morris Wang, Thomas Voisin, Joseph T. McKeown, Jianchao Ye, Nicholas P. Calta et al. doi:10.1038/nmat5021 3D-printed steels with hierarchically heterogeneous microstructures demonstrate high strength and ductility. See also: News and Views by Todd Chiral liquid crystal colloids   pp71 - 79 Ye Yuan, Angel Martinez, Bohdan Senyuk, Mykola Tasinkevych and Ivan I. Smalyukh doi:10.1038/nmat5032 Colloidal chiral springs and helices are formed by light inside a nematic liquid crystal suspension, predefining the mesoscopic superstructures self-assembled in such systems. See also: News and Views by Nayani et al. Intracellular production of hydrogels and synthetic RNA granules by multivalent molecular interactions   pp79 - 89 Hideki Nakamura, Albert A. Lee, Ali Sobhi Afshar, Shigeki Watanabe, Elmer Rho et al. doi:10.1038/nmat5006 An approach to form protein-based hydrogels in living cells that resemble physiological hydrogel-like size-dependent molecular sieves is presented. Synthetic RNA granules mimics are obtained by functionalizing these entities with RNA-binding motifs.   Sequential bottom-up assembly of mechanically stabilized synthetic cells by microfluidics   pp89 - 96 Marian Weiss, Johannes Patrick Frohnmayer, Lucia Theresa Benk, Barbara Haller, Jan-Willi Janiesch et al. doi:10.1038/nmat5005 A microfluidics method to generate giant, copolymer-stabilized liposomes is presented. These vesicles are functionalized with distinct proteins to recapitulate cellular processes.   The development of bioresorbable composite polymeric implants with high mechanical strength   pp96 - 103 Upma Sharma, Danny Concagh, Lee Core, Yina Kuang, Changcheng You et al. doi:10.1038/nmat5016 Metallic stents have been widely used in coronary angioplasty. Here, the authors develop a resorbable self-expanding stent from polymeric elastomers with high mechanical strength for coronary applications.   Corrigenda Top Corrigendum: Fibronectin-bound α5β1 integrins sense load and signal to reinforce adhesion in less than a second   p103 Nico Strohmeyer, Mitasha Bharadwaj, Mercedes Costell, Reinhard Fassler and Daniel J. Müller doi:10.1038/nmat5054   Corrigendum: Robust resistive memory devices using solution-processable metal-coordinated azo aromatics   p103 Sreetosh Goswami, Adam J. Matula, Santi P. Rath, Svante Hedström, Surajit Saha et al. doi:10.1038/nmat5059   Top Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

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