Figure 6.9
 
   
 
 
A
: HPO 4
2–
Immersion in PBS
Cross section of NOC
35–40°
0.462 nm
B
0.66 nm
Cross section of p­NOC
O
H
O
H
O
H
O
H
A
B
O
H
H
O
H
O
H
O
H
O
H
O
O
H
O
H
O
H
O
H
 
128
Bacterial Cellulose
Figure 6.9
Schematics.of.NOC.and.p-NOC.
the.phosphate.anions.are.also.supposed.to.be.aligned.along.the.molecular.
tracks.in.the.newly.prepared.p-NOC.template.
Without.stretching.of.the.gel.containing.phosphate.anions,.a.nonordered.
structure. was. observed. on. the. surface,. which. is. confirmed. by. 2D-FFT.
images,.as.shown.in.Figure 6.8c..By.uniaxial.stretching.of.the.cellulose.gel,.
it is.thought.that.the.p-NOC.will.have.a.unique.surface.morphology.similar.to.NOC.that.is.totally.different.from.the.nonordered.cellulose.template.
containing. phosphate. anions.. The. root. mean. square. (RMS). volumes. were.
calculated. from. the. obtained. AFM. height. images. to. compare. the. surface.
roughness.of.each.template..The.RMS.values.for.p-NOC.and.nonstretched.
cellulose. corresponded. to. 8.3. nm. and. 6.2. nm,. respectively.. Thus. p-NOC.
exhibited.a.rougher.surface.than.cellulose.without.stretching.
Exclusive Surface Properties of NOC
and Its Unique Applications
Biodirected epitaxial Nanodeposition on
Molecular Tracks of NOC Template
As.already.described,.NOC.exhibits.several.unique.properties.as.a.template.
having. the. exclusive. surface. of. a. nano-/microstructure.. That. is,. the. OH.
groups.tend.to.be.oriented.as.molecular.tracks.in.only.one.direction.across.
the.entire.NOC.surface..In.addition,.as.shown.in.Figure 6.4,.the.hydrophobic.
sites.are.supposed.to.appear.alternately.next.to.the.OH.tracks,.resulting.in.
amphiphilic.tracks.in.one.direction.