Droplet-Sized Reaction Flasks

  • Author: ChemistryViews.org
  • Published: 17 January 2018
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Nature/Nature Publishing Group
thumbnail image: Droplet-Sized Reaction Flasks

Bartosz Grzybowski, Institute for Basic Science (IBS), Ulsan, and Ulsan National Institute of Science and Technology, both South Korea, and colleagues have created droplets with a special nanoparticle skin. The researchers call it a multi-responsive surfactant.

In the surfactant, gold is connected with another nanomaterial, such as Fe3O4. The part of the surfactant that contains gold, is coated with hydrophilic ligands. The other part is coated with hydrophobic ligands. This allows the particles to form monolayers at the interface of organic and aqueous solutions. The researchers also use the surfactant to manipulate the orientation of the droplets, transport something inside a droplet, and to mix droplet contents.

Fe3O4 makes the particles magnetic. A magnetic field can be used to move the droplets. Laser light generating heating and convection effects near the nanoparticles can be used to position and spin the droplets. Electrostatic fields can cut tiny holes in the droplets. When two such particles touch, they can merge and combine their contents. Fluids can be mixed because the fluid in the middle of the droplet is rotating with a different speed than the fluid at the edge.

The team used such functionalized nanoparticle dimers as reaction flask: They combined a droplet containing CoCl2 with a droplet containing 1-methylimidazole with laser light. They were merged with an electrostatic field. Their contents were mixed with laser light to create the metal-organic framework ZIF-67. According to the researchers, such multi-responsive surfactants could provide ways of manipulating individual droplets and assembling them into larger systems of dynamic reactors.


Article Views: 940

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH