Dibutyl phosphate/propylamine mixtures show supra-molecular slow building up under magnetic field

Authors

  • Mikolaj Pochylski Adam Mickiewicz University Faculty of Physics, ul. Umultowska 85, Poznan 62-614
  • Vincenzo Turco Liveri Università degli Studi di Palermo, Dipartimento STEBICEF, Parco d’Orleans II, Palermo
  • Pietro Calandra CNR-ISMN Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Via Salaria km 29.300, Monterotondo Stazione (RM) http://orcid.org/0000-0002-4479-4311

DOI:

https://doi.org/10.1478/AAPP.97S2A21

Keywords:

birefringence, amphiphiles, surfactants, magnetic field, self-assembly, smart materials

Abstract

Liquids with anisotropic local nanostructures which are able to be oriented by a magnetic field can give birefringence. Usually magnetically-induced birefringence is low owing to the low magnetic energy of molecules and to the averaging effect due to thermal agitation. At the same time, the response is usually very fast given the typical timescales of molecular orientational dynamics (nanoseconds). However, we show that the dibutyl phosphate/propylamine liquid mixture is characterized by an extremely slow response (hours) to the magnetic field and by an intense overall effect (Δn/λ ≈ −0.1m-1at 1 Tesla).This surprising behavior has been interpreted as a manifestation of a novel phenomenon of progressive building up of larger and larger internally ordered hetero-associates driven by the magnetic field and involving strongly interacting amphiphiles.

Author Biography

  • Pietro Calandra, CNR-ISMN Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Via Salaria km 29.300, Monterotondo Stazione (RM)
    Professor, researcher

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Published

2019-12-20

Issue

Vol 97, SUPPL NO 2 (2019): NACS 2017

Section

NACS 2017 (Conference Proceedings)

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