Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Dynamic and reversible self-assembly of photoelectrochemical complexes based on lipid bilayer disks, photosynthetic reaction centers, and single-walled carbon nanotubes
 
research article

Dynamic and reversible self-assembly of photoelectrochemical complexes based on lipid bilayer disks, photosynthetic reaction centers, and single-walled carbon nanotubes

Boghossian, Ardemis A.  
•
Choi, Jong Hyun
•
Ham, Moon-Ho
Show more
2011
Langmuir

An aq. soln. contg. photosynthetic reaction centers (RCs), membrane scaffold proteins (MSPs), phospholipids, and single-walled carbon nanotubes (SWCNTs) solubilized with the surfactant sodium cholate (SC) reversibly self-assembles into a highly ordered structure upon dialysis of the latter. The resulting structure is photoelectrochem. active and consists of 4-nm-thick lipid bilayer disks (nanodisks, NDs) arranged parallel to the surface of the SWCNT with the RC housed within the bilayer such that its hole injecting site faces the nanotube surface. The structure can be assembled and disassembled autonomously with the addn. or removal of surfactant. We model the kinetic and thermodn. forces that drive the dynamics of this reversible self-assembly process. The assembly is monitored using spectrofluorimetry during dialysis and subsequent surfactant addn. and used to fit a kinetic model to det. the forward and reverse rate consts. of ND and ND-SWCNT formation. The calcd. ND and ND-SWCNT forward rate consts. are 79 mM-1 s-1 and 5.4 × 102 mM-1 s-1, resp., and the reverse rate consts. are negligible over the dialysis time scale. We find that the reaction is not diffusion-controlled since the ND-SWCNT reaction, which consists of entities with smaller diffusion coeffs., has a larger reaction rate const. Using these rate parameters, we were able to develop a kinetic phase diagram for the formation of ND-SWCNT complexes, which indicates an optimal dialysis rate of approx. 8 × 10-4 s-1. We also fit the model to cyclic ND-SWCNT assembly and disassembly expts. and hence mimic the thermodn. forces used in regeneration processes detailed previously. Such forces may form the basis of both synthetic and natural photoelectrochem. complexes capable of dynamic component replacement and repair. [on SciFinder(R)]

  • Details
  • Metrics
Type
research article
DOI
10.1021/la103469s
Author(s)
Boghossian, Ardemis A.  
Choi, Jong Hyun
Ham, Moon-Ho
Strano, Michael S.
Date Issued

2011

Published in
Langmuir
Volume

27

Start page

1599

End page

1609

Subjects

lipid bilayer photosynthetic reaction center carbon nanotube photoelectrochem complex

•

reversible selfassembly kinetic model surfactant photovoltaic electrode material fluorescence

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LNB  
Available on Infoscience
March 3, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/111836
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés