Jump to main content
Jump to site search

Issue 41, 2013
Previous Article Next Article

Mechanism of two-dimensional crystal formation from soft microgel particles

Author affiliations

Abstract

The mechanism of two-dimensional (2D) crystal formation from an air-drying suspension of soft microgel particles is investigated via in situ confocal laser scanning microscopy (CLSM). According to the time-resolved radial distribution function g(r), the process can be divided into two separate stages, i.e., nucleation and growth. During the air-drying process, the soft poly(N-isopropylacrylamide-co-methacrylic acid) (P(NIPAM-co-MAA)) spherical microgel particles first deform into a disk-like shape as the thickness of the concave water layer becomes comparable to their diameter. Subsequently, the particles are driven together by attractive capillary forces to initiate the nucleation process. Once the critical nuclei size is reached, the 2D nuclei can then grow into a crystal. Subsequently, during the crystal growth process, convective water flow compels free microgel particles from the liquid phase to the crystal growth front. While trapped in the growth front, the particles rearrange themselves into crystal structures. The size of 2D crystals increases quadratically with time. Ideally, these findings will promote more experimental and theoretical work aimed at elucidating the 2D fluid-to-solid transition of soft microgel particles, as well as 2D soft disk crystal growth in condensed matter physics.

Graphical abstract: Mechanism of two-dimensional crystal formation from soft microgel particles

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Jul 2013, accepted on 30 Aug 2013 and first published on 02 Sep 2013


Article type: Paper
DOI: 10.1039/C3SM51927A
Citation: Soft Matter, 2013,9, 9924-9930
  •   Request permissions

    Mechanism of two-dimensional crystal formation from soft microgel particles

    G. Wei, C. Zhao, J. Hollingsworth, Z. Zhou, F. Jin, Z. Zhang, H. Cheng and C. C. Han, Soft Matter, 2013, 9, 9924
    DOI: 10.1039/C3SM51927A

Search articles by author

Spotlight

Advertisements