Figure 4
From: Porous Organic Nanolayers for Coating of Solid-state Devices
FTIR spectra of the organic film coated chips with different ratios of APTMS and PFTS. (a) shows the FTIR spectra for film made from 2:1 ratio of APTMS and PFTS. Broad stretching in the range of 2500 - 3200 cm-1 is observed indicating the presence of O-H and C-H bonds. Small peak at 1700 cm-1 indicates the presence of -C = O bonds. The fingerprint region below 1400 had high absorption peaks at 1260 cm-1 and 1070 cm-1 indicating Si-O-Si (siloxane) bonds. Halogen peaks were in the range of 800-600 cm-1 indicating the presence of fluorine due to PFTS. (b) shows the FTIR spectra for film made from 1:2 ratio of APTMS and PFTS. These results showed peaks in the halogen and fingerprint region with broad stretching for C-H bonds. In this spectrum, most of the bonds formed due to APTMS were dominated by the PFTS halogen bonds. These results show the differences in the chemical composition of the organic nanofilm when opposite concentrations of the polymers were used. (c) shows similar data but the APTMS:PFTS concentration used is 1:1. This shows that PFTS is dominant over APTMS.