Instrument Development: Multiplex Sensory Interfaces Between Photonic Nanostructures and Thin Film Ionic Liquids

仪器开发：光子纳米结构和薄膜离子液体之间的多重传感接口

• 批准号: 1904592
• 负责人: Burcu Gurkan
• 金额: $ 45万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904592&HistoricalAwards=false
• 关键词: Instrument; Development; Multiplex; Sensory; Interfaces

Identifying and measuring the amount of naturally occurring or emitted gases and metal species in a highly sensitive way is critical for ensuring the welfare of the public; the safety of first responders, military personnel, and employees in high-risk workplace settings; and the capability to assess the impact of gases and metals that are key to a sustainable global environment. This project develops an unexplored chemical sensing method that is based on the position of light beams being shifted when minute levels of a gas or metal ion are encountered. A team of chemists, physicists, and engineers is taking advantage of the properties of light waves when they bounce off the surface of nanometer-sized metal layers coated with thin films of environmentally friendly ionic liquids. The project aims to offer unprecedented, low-cost monitoring of atmospheric gases and metal ions in the environment, under a wide variety of conditions and locations. Mass production of miniaturized sensors that use the new method has the potential for widespread use of the sensors by people from many walks of life. The multidisciplinary collaborative nature of this research impacts the education of graduate and undergraduate students who are trained using a teamwork approach. To encourage educational opportunities for high school students from underrepresented groups, student interns from the East Cleveland School District are trained through a jointly organized workshop. The workshop has lecture and laboratory components and focuses on how the cross-disciplinary research between engineering and science can address current and pressing needs in society.With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professors B. Gurkan, Hinczweski, Strangi, and U. Gurkan at Case Western Reserve University are addressing development of a new "universal" method for the detection of gases and metal ions. The three specific aims of the study are: (1) engineering a photonic nanostructure to dramatically enhance the Goos-Hanchen (GH) displacement of an incident laser beam, allowing for ultrasensitive detection of local permittivity changes; (2) understanding of the refractive index changes of the ionic liquid layer above the nanostructure, in the presence of solutes such as carbon dioxide and metal salts; and (3) evaluating sensitivity and responsiveness of the multiplex interface. The sensing mechanism is based on GH displacement, where a laser beam internally reflected at a prism surface is displaced along the surface. The size of the GH shift depends on the structure and refractive indices of the materials on top of the prism, including the ionic liquid layer. The photonic nanostructure amplifies the magnitude of the GH shift so that it becomes easily detectable. The photonic nanostructure consisting of alternating dielectric or metal layers with different hierarchical arrangements and architectures are computationally designed and created by nanofabrication. To suppress interferences, multiplexing is employed by the use of different ionic liquids on the top layer with tailorable permittivity changes upon exposure to target analytes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

以高度敏感的方式识别和测量自然存在或发射的气体和金属物种的数量对于确保公众的福利至关重要。 the safety of first responders, military personnel, and employees in high-risk workplace settings; and the capability to assess the impact of gases and metals that are key to a sustainable global environment.该项目开发了一种未开发的化学传感方法，该方法基于遇到气体或金属离子的微光水平的光束位置。当一组化学家，物理学家和工程师从纳米尺寸的金属层的表面弹起，涂有环保离子液体的薄膜时，它们会利用光波的特性。该项目旨在在各种条件和位置下对环境中的大气气体和金属离子进行前所未有的低成本监测。使用新方法的微型传感器的大规模生产具有广泛使用传感器的潜力。这项研究的多学科协作性质影响了接受团队合作方法培训的研究生和本科生的教育。为了鼓励来自代表性不足的团体的高中学生的教育机会，来自东克利夫兰学区的学生实习生通过共同有组织的研讨会进行了培训。 The workshop has lecture and laboratory components and focuses on how the cross-disciplinary research between engineering and science can address current and pressing needs in society.With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professors B. Gurkan, Hinczweski, Strangi, and U. Gurkan at Case Western Reserve University are addressing development of a new "universal" method for the detection of gases and metal ions.该研究的三个特定目的是：（1）工程化光子纳米结构，以极大地增强入射激光束的鹅 - 汉宁（GH）位移，从而可以超敏感性检测局部介电常数的变化； （2）在存在诸如二氧化碳和金属盐等溶质的情况下，了解纳米结构上方离子液体层的折射率变化； and (3) evaluating sensitivity and responsiveness of the multiplex interface. The sensing mechanism is based on GH displacement, where a laser beam internally reflected at a prism surface is displaced along the surface. The size of the GH shift depends on the structure and refractive indices of the materials on top of the prism, including the ionic liquid layer. The photonic nanostructure amplifies the magnitude of the GH shift so that it becomes easily detectable.由具有不同层次排列和架构的交替介电或金属层组成的光子纳米结构是通过纳米制作设计和创建的。为了抑制干扰，通过在接触目标分析物时使用可调节的介电常数的变化，通过在顶层上使用不同的离子液体来采用多路复用。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准通过评估来通过评估来获得支持的。

项目成果

Ultrathin-film optical coating for angle-independent remote hydrogen sensing

• DOI: 10.1088/1361-6501/ab9fd8
• 发表时间: 2020-08
• 期刊: Measurement Science and Technology
• 影响因子: 2.4
• 作者: M. Elkabbash;K. V. Sreekanth;A. Fraiwan;Jonathan Cole;Yunus Alapan;T. Letsou;N. Hoffman;Chunlei Guo-Chu