Stability of lauric acid at high pressure studied by Raman spectroscopy and picosecond acoustics

Sayed Mohamed Baqer Albahrani (1) , Guilhem Simon (1) , Simon Ayrinhac (1) , Michel Gauthier (1) , Frederic Decremps (1) , Isabelle Lisiecki (1) , Salvatore Constanzo (1) , Philippe Colomban (1)

1 MONARIS - De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies

Lauric acid is commonly used as a coating agent which efficiently protects against oxidation and/or coalescence a set of inorganic nanocrystals obtained by chemical process. Its stability under pressure is likely to be informative on the stability and ordering of compressed supercrystals of nanocrystals. Therefore the elastic behaviour of lauric acid submitted to high pressures up to 25 GPa is studied. This elastic behavior has been probed by two complementary in situ techniques at high pressure : Raman spectroscopy and picosecond acoustics. Comparison between pressure-induced transformations as observed with the two techniques suggests that lauric acid remains elastically stable above 2 GPa up to 25 GPa.

Mots clés: lauric acid; fatty acid; supracrytals; high pressures; Raman spectroscopy; picosecond acoustics; lauric acid

Domaines: Matière Condensée [cond-mat]; Géophysique [physics.geo-ph]; Acoustique [physics.class-ph]; Science des matériaux [cond-mat.mtrl-sci]

Sayed Mohamed Baqer Albahrani, Guilhem Simon, Simon Ayrinhac, Michel Gauthier, Frederic Decremps, et al.. Stability of lauric acid at high pressure studied by Raman spectroscopy and picosecond acoustics. The European Physical Journal B: Condensed Matter and Complex Systems, 2019, 92 (2), pp.35. ⟨10.1140/epjb/e2018-90479-7⟩. ⟨hal-02145976⟩