Journal
ACS NANO
Volume 4, Issue 2, Pages 1115-1123Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn901296y
Keywords
computer simulation; microcapsules; nanoparticles; surfaces; cracks
Categories
Funding
- ONR
- DOE
- NSF
- U.S. Department of Energy, Office of Basic Energy Science
- Army Research laboratory
- MR-SEC at the University of Massachusetts Amherst
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [820506] Funding Source: National Science Foundation
Ask authors/readers for more resources
Using a hybrid Computational approach, we simulate the behavior of nanoparticle-filled microcapsules that are propelled by an imposed shear to move over a substrate, which encompasses a microscopic crack. When the microcapsules become localized in the crack, the nanoparticles can penetrate the capsule's shell to bind to and fill the damaged region. Initially focusing on a simple shear flow, we isolate conditions where the microcapsules become arrested in the cracks and those where the capsules enter the cracks for a finite time but are driven to leave this region by the imposed flow. We also characterize the particle deposition process for these two scenarios, showing that the deposition is greater for the arrested capsules. We then determine the effect of utilizing a pulsatile shear flow and show that this flow field can lead to an effective repair-and-go system where the microcarriers not only deliver a high volume fraction of particles into the crack but also leave the fissure and, thus, can potentially repair additional damage within the system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available