Jump to content

Spin echo small angle neutron scattering

From Wikipedia, the free encyclopedia

Spin echo small angle neutron scattering (SESANS) measures structures from around 20 to 2000 nm in size. The information is presented as a real-space (similar to g(r)) as opposed to a reciprocal space (q(r)) mapping. This can simplify the interpretation for some systems.[1] SESANS is useful for studying processes that occur over relatively long time scales, as data collection is often slow, but large length scales. Aggregation of colloids,[2] block copolymer micelles,[3] Stöber silica particles[4] being a prime examples.

The technique offers some advantages over SANS[5] but there are fewer SESANS instruments available than SANS instruments. Facilities for SESANS exist at TUDelft (Netherlands)[6] and Rutherford Appleton Laboratory (UK).[7]

References

[edit]
  1. ^ "Spin-echo small-angle neutron scattering SESANS". TUDelft.
  2. ^ "Colloidal phase diagram studied by SESANS". TUDeltf.
  3. ^ Smith, Gregory N.; Cunningham, Victoria J.; Canning, Sarah L.; Derry, Matthew J.; Cooper, J. F. K.; Washington, A. L.; Armes, Steven P. (2019). "Spin-echo small-angle neutron scattering (SESANS) studies of diblock copolymer nanoparticles". Soft Matter. 15 (1): 17–21. Bibcode:2019SMat...15...17S. doi:10.1039/C8SM01425F. ISSN 1744-683X. PMID 30520930. S2CID 54561253.
  4. ^ Parnell, S. R.; Washington, A. L.; Parnell, A. J.; Walsh, A.; Dalgliesh, R. M.; Li, F.; Hamilton, W. A.; Prevost, S.; Fairclough, J. P. A.; Pynn, R. (2016). "Porosity of silica Stöber particles determined by spin-echo small angle neutron scattering". Soft Matter. 12 (21): 4709–4714. Bibcode:2016SMat...12.4709P. doi:10.1039/C5SM02772A. ISSN 1744-683X. PMID 27021920.
  5. ^ Rehm, Christine; Barker, John; Bouwman, Wim G.; Pynn, Roger (2013-04-01). "DCD USANS and SESANS: a comparison of two neutron scattering techniques applicable for the study of large-scale structures". Journal of Applied Crystallography. 46 (2): 354–364. Bibcode:2013JApCr..46..354R. doi:10.1107/S0021889812050029. ISSN 0021-8898.
  6. ^ "SESANS". TU Delft. Retrieved 2019-10-28.
  7. ^ "ISIS Larmor". www.isis.stfc.ac.uk. Retrieved 2019-10-28.