monomeric) length scale. Rather, the twist of the β-sheet formed by the PLL side
chains was postulated to force the main chain into a helix. Although a detailed
molecular picture on how the side chains arrange to form the β-sheet structure is
still missing, Fig. 21 may well illustrate the simplified origin of the formation of the
cylindrical helix. Accordingly, the presented system constitutes an example of an
intramolecular hierarchical structure formation.
190
200
210
220
230
240
250
-50
-40
-30
-20
-10
0
10
20
30
217
195
216
207
197
200
218
196
[q] x10
-3
(deg cm
2
dmol
-1
)
l (nm)
SDS/lysine: 0
SDS/lysine: 0.87
SDS/lysine: 1.74
SDS/lysine: 2.61
SDS/lysine: 4.36
Fig. 19 CD spectra of PLL brush and of PLL–SDS complexes prepared with increasing SDS
content. From [90]
Fig. 20 AFM micrographs of sample CB-PLL55 in 0.005 M NaBr solution (left height, middle
amplitude) and cryo-TEM picture (right). From [88]
Structure Formation of Polymeric Building Blocks: Complex Polymer Architectures
141