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科学家首次造出并操纵类光波尾迹
科学家 操纵类光波尾迹
2015/7/30
物体在一种介质中通过的速度比它产生波的速度快，就会形成尾迹，如一架超音速飞机飞过天空，会留下尾迹一样。最近，美国哈佛大学研究人员首次在一种金属表面——表面等离激元上造出了类似的光波尾迹。相关论文发表在最近的《自然·纳米技术》杂志上。只要有波就会有尾迹，即使光波也可以。虽然没有东西比光在真空中的速度更快，但光并不总在真空中，某种东西可能在一种介质或材料中的速度比光的相位速度更快，这样就会产生尾迹，如...
新材料可让窗户动态调控光和热
窗户动态 调控光和热
2015/7/24
德克萨斯大学奥斯汀分校的研究人员又朝智能窗户迈进了一大步。他们研发出一种新的工程材料，可以让窗户透光的同时不传送热量，或者让窗户传送热量的同时遮挡光线。这种材料可以让居住者更加精确地控制通过窗户的能量和光照，因此能够大大降低建筑内部制冷或制热的成本。据物理学家组织网7月23日（北京时间）报道，2013年该校化学工程教授迪莉娅·米丽蓉的团队率先在世界范围内研发双频段电致变色材料，这种材料具有显著的光...
A single drop of blood is teeming with microorganisms—imagine if we could see them, and even nanometer-sized viruses, with the naked eye. That’s a real possibility with what scientists call a “perfect...
Revolutionary discovery leads to invention of new ‘building blocks’
Revolutionary building blocks
2015/4/23
Macromolecular science will have to add a new giant molecule to its lexicon thanks to new and cutting-edge polymer research at The University of Akron. The research team led by Stephen Z.D. Cheng, pro...
Engineers Create Structures Tougher Than Bulletproof Vests
Engineers Structures Bulletproof Vests
2015/3/26
Researchers at UT Dallas have created new structures that exploit the electromechanical properties of specific nanofibers to stretch to up to seven times their length, while remaining tougher than Kev...
Researchers Use Liquid Shearing Method to Create Nanofiber ‘Gusher’
Researchers Liquid Shearing Method Nanofiber Gusher
2015/3/19
Creating large amounts of polymer nanofibers dispersed in liquid is a challenge that has vexed researchers for years. But engineers and researchers at North Carolina State University and one of its st...
Funding cutting-edge, collaborative research（图）
Funding cutting-edge collaborative research
2015/2/18
Materials science and engineering research thrives in collaborative environments, and now we have 12 more examples of how the National Science Foundation (NSF) helps ensure creative, inclusive environ...
Researchers Glimpse Distortions in Atomic Structure of Materials（图）
Researchers Glimpse Distortions Atomic Structure of Materials
2015/2/13
Researchers from North Carolina State University are using a technique they developed to observe minute distortions in the atomic structure of complex materials, shedding light on what causes these di...
Silver Nanowires Demonstrate Unexpected Self-Healing Mechanism
Silver Nanowires Unexpected Self-Healing
2015/1/23
With its high electrical conductivity and optical transparency, indium tin oxide is one of the most widely used materials for touchscreens, plasma displays, and flexible electronics. But its rapidly e...
From the Bottom Up: Manipulating Nanoribbons at the Molecular Level（图）
From the Bottom Up Manipulating Nanoribbons Molecular Level
2015/1/20
Narrow strips of graphene called nanoribbons exhibit extraordinary properties that make them important candidates for future nanoelectronic technologies. A barrier to exploiting them, however, is the ...
Hands on: Crafting ultrathin color coatings（图）
Hands on Crafting ultrathin color coatings
2014/12/22
In a sub-basement deep below the Laboratory for Integrated Science and Engineering at Harvard University, Mikhail Kats gets dressed. Mesh shoe covers, a face mask, a hair net, a pale gray jumpsuit, kn...
Researchers at Rice University have created flexible, patterned sheets of multilayer graphene from a cheap polymer by burning it with a computer-controlled laser. The process works in air at room temp...
Nanoparticle Allows Low-Cost Creation of 3-D Nanostructures（图）
Nanoparticle Low-Cost Creation 3-D Nanostructures
2014/12/8
Researchers from North Carolina State University have developed a new lithography technique that uses nanoscale spheres to create three-dimensional (3-D) structures with biomedical, electronic and pho...
Penn Researchers Show Commonalities in How Different Glassy Materials Fail
Different Glassy Materials Fail
2014/12/8
Glass is mysterious. It is a broad class of materials that extends well beyond the everyday window pane, but one thing that these disparate glasses seem to have in common is that they have nothing in ...
科学家实现短时室温超导
科学家 短时 室温超导
2014/12/6
最近，一个由德国马克斯·普朗克物质结构与动力学研究所领导的国际研究小组经过一年的实验，借助短红外激光脉冲在一种陶瓷材料上成功实现了室温超导——虽然只有百万分之几微秒。这一发现有助于开发新型高温超导材料，并发现这些材料的新用途。相关论文发表在最近的《自然》杂志上。