Optofluidic Tweezers

光流控镊子

• 批准号: 1232226
• 负责人: Amar Basu
• 金额: $ 33.53万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1232226&HistoricalAwards=false
• 关键词: Optofluidic; Tweezers

The objective of this research is to investigate a novel class of optical tweezers which can trap and manipulate liquid droplets with large force. The approach, termed optofluidic tweezers (OFT), is based on the photomechanical conversion of light into 3-dimensionally confined thermocapillary microvortices which align a droplet on the axis of a focused laser.Intellectual Merit. OFT relies on capillary forces, a mechanism fundamentally different from traditional optical tweezers. It can attain forces in the µN range, which is 100,000X larger than optical tweezers and 1,000X larger than optoelectronic tweezers. This unique feature makes OFT a potentially transformative approach for liquid manipulation over a wide range of length scales. This research will build a fundamental understanding of the energy transduction and trapping mechanism through the systematic study of flow fields, temperature profiles, holding forces, geometric scaling, and material properties. It will also create a prototype system for OFT-based manipulation.Broader Impacts. Optical manipulation tools are broadly used in biology, physics, and engineering, typically at the micro and nanoscale. Due to its large force, OFT can extend these capabilities to the millimeter scale, enabling new applications in electronics manufacturing and lab-on-a-chip systems. This highly interdisciplinary project combines optics, fluid dynamics, and interfacial phenomena, providing a unique platform for training graduate and undergraduate students. The PI will leverage Wayne State University?s established channels for recruiting underrepresented minorities. The PI will also develop a ?jello microfluidics? module for Detroit Science Center Nanodays, an NSF-sponsored program for nanoscale science education targeted to K-12 students.

这项研究的目的是研究一类新型的光学镊子，这些光学镊子可以用大力捕获和操纵液滴。该方法称为Optofluidic Tweezer（OFT），基于光机械转换为3维限制的热毛细管微效应，该微毛细管将液滴对齐聚焦激光器的轴。经常依靠毛细管力，这是一种与传统的机制，它可以在µn范围内获得100,000倍的力量，比光学镊子大100,000倍，比光电镊子大1,000倍。这一独特的功能使FOST在较宽的长度尺度上进行了潜在的液体操作方法。这项研究将通过系统研究流场，温度曲线，保持力，几何缩放和材料特性来建立对能量转移和捕获机制的基本理解。它还将创建一个原型系统，用于基于基于的操作。光学操纵工具通常在微观和纳米级的生物学，物理和工程中广泛使用。由于其较大的力量，经常可以将这些功能扩展到毫米量表，从而在电子制造和实验室中实现了新的应用程序。这个高度的跨学科项目结合了光学，流体动力学和界面现象，为培训毕业生和本科生提供了独特的平台。 PI将利用韦恩州立大学的建立渠道来招募代表性不足的少数民族。 PI还会开发果冻微流体吗？底特律科学中心Nanodays的模块，这是针对K-12学生的NSF赞助的纳米级科学教育计划。