2.2. Langmuir films
The Langmuir and Langmuir-Blodgett films were fabricated
using a mini-trough (KSV Instruments) equipped with the folfollowing:
(i) two mobile barriers capable of sweeping the aqueous
surface; (ii) a filter paper intercepting the air–water interface to
measure the surface tension using the Wilhelmy method; (iii) a
device for the deposition of Langmuir–Blodgett (LB) films; and (iv) a
polarization modulation infrared reflection–absorption spectrometer
(PM-IRRAS) from KSV Instruments.