Biomedical Engineering Reference
In-Depth Information
d
n
3
r
4
n
g
|
7
.
Figure 10.4 Various methods of creating chemical and topographical gradients:
(A) vapour diffusion of organosilanes;
89
(B) diffusion of alkanethiols in
a polysaccharide matrix;
90
(C) immersion technique applied to self-
assembled monolayers;
91
(D) printing alkanethiols from stamps of
variable thickness;
92
(E) solution and surface gradients using micro-
fluidics;
93,94
(F) corona discharge;
95,96
(G) co-polymer gradients
through microfluidic mixing of two monomers followed by chamber
filling method;
97
(H) solution draining for creating polymer brushes;
98
(I) knife-edge coating technology;
99-101
(J) temperature gradient heating
of substrate;
102,103
(K) molecular gradient of initiator followed by
grafting from polymerisation;
104
(L) plasma polymer diffusion under
a stationary mask;
7,105
(M) porous silicon gradient by anodic etching
(also used for chemical gradients via electrografting);
46,106-108
(N)
plasma polymerisation using a moving slit mask whilst simultaneously
varying monomer ratio;
109,110
(O) sand blasting followed by chemical
polishing;
111
(P) immersion of a functional group chemical gradient in
a nanoparticle solution.
51,112
Figures A to K adapted from Genzer and Bhat,
83
Figure L from Zelzer
et al.,
7
Figure M from Khung et al.,
106
Figure N from Murray et al.,
110
Figure O from Kunzler et al.,
111
and Figure P from Goreham et al.
51
Search WWH ::
Custom Search