Figure 3

a Frequency changes during LbL chitosan-HAP build-up: 1-Cht deposition, 2-rinsing, 3-H AP deposition and 4-rinsing.b Dissipation changes during LbL chitosan-HAP build-up: 1-Cht deposition, 2-rinsing, 3-H AP deposition, and 4-rinsing. The 5th (squares), 7th (circles) and 9th (triangles) overtones are represented.c Change in the film’s thickness during LbL build-up: cht (squares) and HAP (circles)