Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Switching supramolecular polymeric materials with multiple length scales

Ruokolainen1, Makinen, Torkkeli

  • 1J. Ruokolainen and O. Ikkala, Department of Engineering Physics and Mathematics, Helsinki University of Technology, FIN-02015 HUT, Espoo, Finland. R. Makinen, M. Torkkeli, R. Serimaa, Department of Physics, University of Helsinki, Post Office B.

Science (New York, N.Y.)
|May 6, 1998
PubMed
Summary

Researchers created tunable polymeric nanostructures by controlling phase transitions. These structures exhibit temperature-dependent electrical conductivity, offering potential for advanced materials.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Elasticity of Poissonian fiber networks

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2000
Same author

Discovery of a comet by its Lyman-alpha emission

Nature·2000
Same author

Stable sulphate clusters as a source of new atmospheric particles

Nature·2000
Same author

Fine root biomass of Scots pine stands differing in age and soil fertility in southern Finland.

Tree physiology·1999
Same author

Order-disorder transitions in polymer-surfactant systems.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·1996
Same author

Observation of compensating Ga vacancies in highly Si-doped GaAs.

Physical review. B, Condensed matter·1996

Area of Science:

  • Polymer Science and Engineering
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Polymeric supramolecular nanostructures offer tunable hierarchical order-disorder and order-order transitions.
  • Controlling these transitions allows for concurrent switching of functional properties in materials.
  • Diblock copolymers provide a versatile platform for creating complex self-assembled structures.

Purpose of the Study:

  • To demonstrate straightforward tailoring of hierarchical order-disorder and order-order transitions in polymeric nanostructures.
  • To investigate the concurrent switching of functional properties, specifically electrical conductivity, by controlling microstructural transitions.
  • To achieve controlled self-organized structures-in-structures using block copolymers and supramolecular complexation.

Main Methods:

Related Experiment Videos

  • Stoichiometric protonation of poly(4-vinyl pyridine) (P4VP) with methane sulfonic acid (MSA) to form P4VP(MSA)1.0.
  • Hydrogen-bonding complexation of P4VP(MSA)1.0 with pentadecylphenol.
  • Complexation of MSA and pentadecylphenol to the P4VP block of a microphase-separated diblock copolymer poly[styrene-block-(4-vinyl pyridine)].
  • Observation of microphase separation, re-entrant closed-loop macrophase separation, and high-temperature macrophase separation.

Main Results:

  • Achieved systematic control over hierarchical phase transitions in self-organized structures-in-structures at two distinct length scales (48 and 350 angstroms).
  • Demonstrated the ability to induce temperature-dependent transitions in electrical conductivity through microstructural control.
  • Observed various phase separation behaviors including microphase separation, re-entrant closed-loop macrophase separation, and high-temperature macrophase separation.

Conclusions:

  • Polymeric supramolecular nanostructures with controlled hierarchical transitions enable tunable functional properties.
  • The developed method allows for precise control over self-assembled structures across multiple length scales.
  • This approach provides a pathway for designing materials with switchable electrical conductivity for advanced applications.