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>Press>里程碑式的发现可以提高军队的激光器,精密传感器

在纽约大学陆军资助的研究开发方法来创建该胶体结晶成钻石格。工程的信贷NYU坦登学校
在纽约大学陆军资助的研究开发方法来创建该胶体结晶成钻石格。工程的信贷NYU坦登学校

抽象:
陆军资助的里程碑式的发现在纽约大学可以改变研究人员开发的方式,并使用光学技术,如激光,传感器和光子电路在未来十年。

Landmark discovery could improve Army lasers, precision sensors

Research Triangle Park, NC | Posted on September 29th, 2020

After years of research, the team of scientists achieved what many thought was perhaps impossible-they developed a method to create colloids that crystallize into the diamond lattice. This photonic technique, published in Nature, could lead to cheap, reliable and scalable fabrication of 3D photonic crystals for optical circuits and light filters.

These 3D photonic crystals--self-assembled formations of miniscule materials in a stable assembly--could open the door to lightweight high-efficiency lasers, precise light control with 3D photonic circuits and new materials for managing thermal or radio signatures.

High-efficiency lasers are key to Army modernization priorities, including Air and Missile Defense, as they play a key role in both precision sensing and directed energy systems. Likewise, efficient lasers and integrated photonic circuits will play a key role in next-generation technologies like light-based quantum computing, atomic clocks and gyroscopes for precision navigation and timing, and optical systems with improved size, weight, and power.

“这种长期追求的第一自组装胶体金刚石晶格的演示将解锁防御技术的重要部门新的研究和发展的机会可能来自三维光子晶体中受益,”埃文Runnerstrom博士,项目经理,陆军研究办公室表示,an element of the U.S. Army Combat Capabilities Development Command's Army Research Laboratory.

Colloidal crystals, made up of spheres hundreds of times smaller than the diameter of a human hair, can be arranged in different crystalline shapes depending on how the spheres are linked to one another. Each colloid attaches to another using strands of DNA glued to surfaces of the colloids that function as a kind of molecular Velcro. When colloids collide with each other in a liquid bath, the DNA snags and the colloids are linked. Depending on where the DNA is attached to the colloid, they can be programmed to spontaneously create complex structures.

This process has been used in the past to create strings of colloids and even close-packed cubic colloidal crystals, but not the diamond structure--which displays an optical band gap for visible light. Much as a semiconductor filters out electrons in a circuit, an optical band gap completely rejects certain wavelengths of light. Filtering light in this way is practical only if the colloids are arranged in a diamond formation, a process previously deemed too difficult and expensive to perform at commercial scale.

“还有的是工程师的一个伟大的愿望,使金刚石结构,”大卫·派恩博士,在工程NYU坦登学院化学和生物分子工程学教授说。“大多数研究人员已经放弃了它,说实话 - 我们可能是谁在这个仍在工作是世界上唯一群体我觉得论文发表会作为一个惊喜,给社会的东西。”

研究人员发现,他们可以使用,将自发地产生必要的交错结合,使这个结构可能一个立体联动机制。当这些金字塔胶体相互接近,他们在必要的定向链接到生成金刚石的形成。而不是通过艰苦并通过使用自上而下的建设,这些结构的昂贵的过程去接近像纳米材料制备,这种机制允许胶体从自下而上的机制本身,而不需要外界的干扰。此外,金刚石结构是稳定的,即使当它们在形成液体被除去。

团队和他们的合作者 - 包括来自中心DE RECHERCHE保罗帕斯卡尔研究员 - CNRS,佩萨克,法国;成均馆大学,水原,韩国 - 现在专注于将这些胶体钻石成可以在实际环境中使用3D光子晶体。他们使用的是他们新的结构,可以滤除光波长,以证明在未来技术的实用性已经创建材料。vwin徳赢官网

“我对这个结果高兴,因为它奇妙说明ARO的材料设计方案的主要目标 - 支持高风险,高回报的研究,用于解锁自下而上的路线,创造非凡的材料,以前不可能让” Runnerstrom说过。

###

The National Science Foundation also funded this research.

Visit the laboratory's Media Center to discover more Army science and technology stories

####

www vwin com关于美国陆军研究实验室
CCDC陆军研究实验室的一个元素U.S. Army Combat Capabilities Development Command. As the Army's corporate research laboratory, ARL discovers, innovates and transitions science and technology to ensure dominant strategic land power. Through collaboration across the command's core technical competencies, CCDC leads in the discovery, development and delivery of the technology-based capabilities required to make Soldiers more lethal to win the nation's wars and come home safely. CCDC is a major subordinate command of the U.S. Army Futures Command.

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