Beilstein J. Nanotechnol.2017,8, 475–484, doi:10.3762/bjnano.8.51
pressure and condensation of the adsorbate on the mesopores was dominant at higher relative pressure.
Keywords: fiber optic sensors; isostericenthalpyofadsorption; n-hexane; phenyl-silica; xerogel films; Introduction
Fiber optic chemical sensors (FOCSs) that employ sensitive films for the detection of
, it loses translational entropy. The aim of this study was to assess the effect of temperature on the sensitivity of hybrid phenyl-silica films to n-hexane and to determine the variation of the isostericenthalpyofadsorption.
Materials and Methods
Optical fibers and preparation of xerogel films
K, which corresponded to 6.4 hPa at 288 K, and 19.6 hPa at 323 K in pressure units.
Isostericenthalpyofadsorption
The experimental procedure for determining the isostericenthalpyofadsorption in the ideal gas approximation consists of plotting the response of the sensing element, log(Io/I), as
PDF
Figure 1:
Infrared spectra of xerogels in two wavenumber ranges: (a) 4000–2750 cm−1 and (b) 1600–400 cm−1.