Neutrons and model membranes: Moving towards complexity

Research output: Contribution to journalReview article

Abstract

Cells, the basic units of living organisms, are well delineated and separated from the external environment by membranes. Capable of both enclosing the cellular constituents and allowing exchanges with the outside world, these membranes are only a few nanometers thick. All the membranes in a human body cover an area of a few hectares, but account for only a small part of our mass. To study the dynamics and function of these amazing objects, physicists first seek to understand their structure. This involves experiments on model systems, simpler and better controlled than real membranes, and can profit from a probe that is able to access different scales of size and time: thermal neutrons. Since the pioneering work in the seventies on cell membrane structure by neutron scattering, developments driven by constantly improving neutron instrumentation, coupled with development of measurement and analysis methods, have involved both the optimization of samples towards more biologically relevant model systems and include the use of more complex lipid mixtures up to natural extracts. This review does not have the ambition to address the large number of contributions from all the groups working in this area in research laboratories and neutron facilities. It gives an update on some studies in the field carried out mainly by the authors and collaborators.

Details

Authors
  • Giovanna Fragneto
  • Robin Delhom
  • Loïc Joly
  • Ernesto Scoppola
Organisations
External organisations
  • Institut Laue Langevin
  • Polytechnic University of Milan
  • Max Planck Institute of Colloids and Interfaces
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Materials Chemistry

Keywords

  • Bilayers, Interfaces, Lipids, Membranes, Neutron scattering, Yeasts
Original languageEnglish
Pages (from-to)108-121
Number of pages14
JournalCurrent Opinion in Colloid and Interface Science
Volume38
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes