Polyelectrolyte Multilayers for Fibre Engineering - The Nanoscience and Technology of Renewable Biomaterials - page 128

1.6

1.4

1.2

PAH PAA PAH

1

0.8

0.6

Rinse

0.4

0.2

0

0 1000 2000 3000 4000 5000

Time (s)

(a)

50

PAH pH 7.5/PAA pH 7.5

Rinse

0

− 50

− 100 PAH PAA PAH

150

−

− 200

0 1000 2000 3000 4000 5000 6000

Time (s)

(b)

Figure 5.3 Typical results from SPAR and QCM-D measurements as functions of time
withcombinationsof PAH/PAAlowmolecularmass polyelectrolytes (15,000/5000) toSiO 2
surfaces at a pH 7.5 for both polyelectrolytes. (a) SPAR data corresponding to the solid

amountofadsorbedpolyelectrolyte;(b)QCM-Dfrequencydatacorrespondingtotheadsorbed
amount includingimmobilisedliquid; and(c)QCM-Ddissipationdatacorresponding tothe
visco-elasticpropertiesof theadsorbedlayers.Datafrom(19).

=