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Dynamic and Stimuli-Responsive Multi-Phase Emulsion Droplets for Optical Components

  • Book
  • © 2020

Overview

Authors:
  1. Sara Nagelberg

    1. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, USA

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  • Nominated as an outstanding PhD thesis by Massachusetts Institute of Technology
  • Presents innovative new uses for fluids in micro-optical components
  • Mathematically explains structural color resulting from interference in concave microstructures
  • Describes applications of optofluidic devices for pathogen sensing

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (6 chapters)

  1. Front Matter

    Pages i-xiii
    Download chapter PDF

  2. Introduction

    • Sara Nagelberg
    Pages 1-11

  3. Multi-Phase Droplets as Dynamic Compound Micro-Lenses

    • Sara Nagelberg
    Pages 13-31

  4. Emissive Bi-Phase Droplets as Pathogen Sensors

    • Sara Nagelberg
    Pages 33-43

  5. Structural Color from Interference of Light Undergoing Total Internal Reflection at Concave Interfaces

    • Sara Nagelberg
    Pages 45-69

  6. Thermal Actuation of Bi-Phase Droplets

    • Sara Nagelberg
    Pages 71-82

  7. Summary and Outlook

    • Sara Nagelberg
    Pages 83-84

  8. Back Matter

    Pages 85-106
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Keywords

About this book

This thesis builds on recent innovations in multi-phase emulsion droplet design to demonstrate that emulsion morphologies enable a useful variety of dynamic optical phenomena. Despite the highly dynamic nature of fluid morphologies and their utility for stimuli-responsive, dynamic optical materials and devices, fluid matter is underrepresented in optical technology. Using bi-phase emulsion droplets as refractive micro-optical components, this thesis realizes micro-scale fluid compound lenses with optical properties that vary in response to changes in chemical concentrations, structured illumination, and thermal gradients. Theoretical considerations of emulsions as optical components are used to explain a previously unrecognized total internal reflection-enabled light interference phenomenon in emulsion droplets that results in rich structural coloration. While this work is focused on the fundamental optics of emulsion droplets, it also facilitates the use of light-emitting emulsion morphologies as chemo-optical transducers for early-stage food-borne pathogen detection. This thesis beautifully demonstrates the virtue of fundamental interdisciplinary exploration of unconventional material systems at the interface of optics, chemistry, and materials science, and the benefits arising from translation of the acquired knowledge into specific application scenarios.

Authors and Affiliations

  • Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, USA

    Sara Nagelberg

About the author

Sara Nagelberg is a postdoctorial researcher at MIT. She received her PhD from MIT in 2020.

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