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Lipid membrane-assisted condensation and assembly of amphiphilic Janus particles

Journal Article · · Soft Matter
DOI:https://doi.org/10.1039/c6sm02171a· OSTI ID:1334497
 [1];  [2];  [1];  [1];  [3];  [1];  [2];  [1]
  1. Indiana Univ., Bloomington, IN (United States)
  2. Columbia Univ., Broadway, NY (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Amphiphilic Janus particles self-assemble into complex metastructures, but little is known about how their assembly might be modified by weak interactions with a nearby biological membrane surface. Here, we report an integrated experimental and molecular dynamics simulation study to investigate the self-assembly of amphiphilic Janus particles on a lipid membrane. We created an experimental system in which Janus particles are allowed to self-assemble in the same medium where zwitterionic lipids form giant unilamellar vesicles (GUVs). Janus particles spontaneously concentrated on the inner leaflet of the GUVs. They exhibited biased orientation and heterogeneous rotational dynamics as revealed by single particle rotational tracking. The combined experimental and simulation results show that Janus particles concentrate on the lipid membranes due to weak particle–lipid attraction, whereas the biased orientation of particles is driven predominantly by inter-particle interactions. Furthermore, this study demonstrates the potential of using lipid membranes to influence the self-assembly of Janus particles.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1334497
Report Number(s):
SAND--2016-12074J; 649523
Journal Information:
Soft Matter, Journal Name: Soft Matter Journal Issue: 45 Vol. 12; ISSN SMOABF; ISSN 1744-683X
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Cooperative assembly of Janus particles and amphiphilic oligomers: the role of Janus balance journal January 2019
Vesicle constriction by rings of Janus nanoparticles and aggregates of curved proteins journal May 2019

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