Next Article in Journal
Cell Size Discrimination Based on the Measurement of the Equilibrium Velocity in Rectangular Microchannels
Next Article in Special Issue
Dynamics of Electrowetting Droplet Motion in Digital Microfluidics Systems: From Dynamic Saturation to Device Physics
Previous Article in Journal
Novel SU-8/Ionic Liquid Composite for Tribological Coatings and MEMS
Article Menu

Export Article

Open AccessArticle
Micromachines 2015, 6(5), 622-633;

Formation of Polymeric Hollow Microcapsules and Microlenses Using Gas-in-Organic-in-Water Droplets

Faculty of Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
Department of Biomedical Devices and Instrumentation, Tokyo Medical and Dental University, 2-3-10, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea
Institute for Nanoscience and Nanotechnology, Waseda University, 513, Tsurumaki-cho, Waseda, Shinjuku-ku, Tokyo 162-0041, Japan
Author to whom correspondence should be addressed.
Academic Editors: Andrew deMello and Xavier Casadevall i Solvas
Received: 24 April 2015 / Revised: 18 May 2015 / Accepted: 19 May 2015 / Published: 21 May 2015
(This article belongs to the Special Issue Droplet Microfluidics: Techniques and Technologies)
Full-Text   |   PDF [4638 KB, uploaded 22 May 2015]   |  


This paper presents methods for the formation of hollow microcapsules and microlenses using multiphase microdroplets. Microdroplets, which consist of a gas core and an organic phase shell, were generated at a single junction on a silicon device without surface treatment of the fluidic channels. Droplet, core and shell dimensions were controlled by varying the flow rates of each phase. When the organic solvent was released from the organic phase shell, the environmental conditions changed the shape of the solidified polymer shell to either a hollow capsule or a microlens. A uniform solvent release process produced polymeric capsules with nanoliter gas core volumes and a membrane thickness of approximately 3 μm. Alternatively physical rearrangement of the core and shell allowed for the formation of polymeric microlenses. On-demand formation of the polymer lenses in wells and through-holes polydimethylsiloxane (PDMS) structures was achieved. Optical properties of the lenses were controlled by changing the dimension of these structures. View Full-Text
Keywords: multiphase microdroplet; hollow microcapsule; microlens multiphase microdroplet; hollow microcapsule; microlens

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Yoon, D.H.; Hasegawa, K.; Kaneko, Y.; Arakawa, T.; Go, J.S.; Sekiguchi, T.; Shoji, S. Formation of Polymeric Hollow Microcapsules and Microlenses Using Gas-in-Organic-in-Water Droplets. Micromachines 2015, 6, 622-633.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Micromachines EISSN 2072-666X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top