Abstract:
:Rod-like colloids distort fluid interfaces and interact by capillarity. We explore this interaction at the free surface of aligned nematic liquid crystal films. Naive comparison of capillary and elastic energies suggests that particle assembly would be determined solely by surface tension. Here, we demonstrate that, under certain circumstances, the capillary and elastic effects are complementary and each plays an important role. Particles assemble end-to-end, as dictated by capillarity, and align along the easy axis of the director field, as dictated by elasticity. On curved fluid interfaces, however, curvature capillary energies can overcome the elastic orientations and drive particle migration along curvature gradients. Domains of dominant interaction and their transition are investigated.
journal_name
Proc Natl Acad Sci U S Aauthors
Liu IB,Gharbi MA,Ngo VL,Kamien RD,Yang S,Stebe KJdoi
10.1073/pnas.1504817112subject
Has Abstractpub_date
2015-05-19 00:00:00pages
6336-40issue
20eissn
0027-8424issn
1091-6490pii
1504817112journal_volume
112pub_type
杂志文章abstract::Proalbumins are rare genetic variants of human serum albumin containing a basic propeptide that is not removed during post-transcriptional processing because of a mutation in the site of excision, an Arg-Arg sequence. We have identified the amino acid substitutions in three different types of proalbumins designated Ga...
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