3 years ago

Controlling Nanodrop Passage through Capillary Nanovalves by Adjusting Lyophilic Crevice Structure

Controlling Nanodrop Passage through Capillary Nanovalves
by Adjusting Lyophilic Crevice Structure
Heng-Kwong Tsao, Yu-En Liang, Yu-Jane Sheng, Yu-Hsuan Weng
The passage or blockage of nanodrops through a nanovalve made of a nanocrevice is explored by proof-of-concept simulations, including many-body dissipative particle dynamics and Surface Evolver simulations. Although it is generally believed that the drops wet lyophilic crevices readily, we show that the penetration of the drops into such crevices with specific structures can be prevented. The morphological phase diagram in terms of the contact angle (θY) and wedge angle (α) are constructed, and three regimes are identified: non-penetration and partial penetration, in addition to complete penetration. It is interesting to find that as long as α is small enough, the drop always runs away from the crevice even on lyophilic surfaces, leading to the non-penetration state. For intermediate α and small θY, the drop tends to break up, and only a portion of liquid wets the crevice, corresponding to the partial penetration state. Our simulation results demonstrate that a lyophilic capillary nanovalve for controlling the droplet passage can be fabricated by simply adjusting the wedge angle of the crevice.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b11624

DOI: 10.1021/acs.jpcc.7b11624

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.