[Images above] Credit: NIST
纳米材料
Ultrafast and coupled: Atomic vibrations in boron nitride
来自柏林，蒙彼利埃，南特，巴黎和伊萨卡的科学家的国际合作提出了关于在氮化氢甲酯中耦合声子超快动态的详细实验和理论结果。
New metalens focuses light with ultradeep holes
哈佛大学约翰·鲍尔森工程和应用科学学院的研究人员开发了一个元图，它使用非常深，非常狭窄的孔而不是很高的柱子将光线聚焦到一个位置。
Rice University engineers created nanostructures of silica with a sophisticated 3D printer, demonstrating a method to make microscale electronic, mechanical, and photonic devices from the bottom up.
Carbon nanotube nanocomposite ink for additive manufacturing
Researchers from Michigan Technological University added carbon nanotubes to a nanoclay and epoxy nanocomposite ink to enhance mechanical properties.
活力
Nara Institute of Science and Technology researchers extended the mathematical approach of automatic differentiation from machine learning to the fitting of model parameters that describe behavior of metal oxide semiconductor field-effect transistors. They extracted parameters up to 3.5 times faster compared with previous methods.
Winds of change: Improvements for wind energy production
研究人员检查了风速的昼夜和季节性模式及其对能源生产充分性的影响。结果帮助他们制定了季节性充分性评估程序。
一组材料科学家和化学家确定了锂金属电池在电池运行过程中需要进行的适当堆叠压力，以产生最佳性能。
生物材料
Nanosilver no ‘silver bullet’ in long-term treatment of infections
New research from the University of Technology Sydney found that pathogens that form biofilms can evolve to survive nanosilver treatment. The study is the first to demonstrate that long-term nanosilver treatment can increase the risk of recurrent infections.
环境
Putting honeybee hives on solar parks could boost the value of UK agriculture
Using crop distribution patterns in 2017, researchers from Lancaster University and the University of Reading found that deploying honeybees on solar parks could have raised the value of crop yields that year by £5.9 million.
在分析了60个国家 /地区的风能和太阳能的增长速度之后，查尔默斯技术大学和瑞典隆德大学和奥地利维也纳的中欧大学的研究人员得出结论，几乎没有一个国家能够足够快地移动以避免全球变暖1.5°C甚至2°C。
MANUFACTURING
How long can fiber reinforced polymer composites sustain concrete structures?
来自韩国和美国的研究人员进行了13年的实验，以确定纤维增强的聚合物复合材料是临时贴片还是耐用的解决方案，以维持混凝土基础设施。他们发现环境条件对债券行为产生了重大影响。
其他故事
Zeolites’ isotopes defy nature
Northwestern University researchers analyzed ancient zeolite specimens collected from the edges of East Iceland to discover that zeolites separate calcium isotopes in a wholly unexpected way.
By combining a careful balance of thin-film strain, distortion, and thickness, University of New South Wales researchers stabilized a new intermediate phase in BiFeO3。他们计划将氧化物超级晶格的方法结合在一起，并将低对称晶体结构与其他建立的途径相结合，以改善压电。
瑞典查尔默斯技术大学的研究人员通过混合许多不同的分子，一次最多八个分子，创造了一种新型的超级稳定，耐用的玻璃。他们与一系列小型共轭分子一起工作，其中包括一个在海湾位置的per烯核心，并具有不同的吊坠烷基。
Quantum material stretches to boost superconductivity
由明尼苏达大学领导的国际研究人员团队发现，钛酸锶的变形可能会导致其晶体结构的缺陷，实际上可以改善材料的超导和电气性能。
Researchers from the Beijing Institute of Control Engineering provided backstage details of the technology that helped guide, navigate, and control the successful lunar landing of the Chang’e-5 lunar mission, the first lunar sample-return mission in over 40 years.
一组俄罗斯物理学家在有限的温度下证明了量子绝热定理，并确定了绝热动态的定量条件。他们发现，在某些系统中，绝热动态在有限温度下比在绝对零下更稳定。