Biomedical Engineering Reference
In-Depth Information
TABLe 9.1
Nanofabrication.Approaches.to.Biomimetic.Butterly.Wing.Structures
Nanofabrication
Methods
Major Materials
Used
Structures Achieved
Pros and Cons
References
CVD
Calcined.silica.replica.(100-150.nm.thick)
Silica
Pros:
.inexpensive.process;.compatibility.to.the.
natural.structure
Cons:
.harder.and.more.brittle.than.the.natural.
structure
Cook.et.al..(2003)
FIB-CVD.CAD
The.quasi-structure.(200.nm.thick).2.60.μm.
in.height,.0.26.μm.in.width,.20.μm.in.
length,.and.0.23.mm.grating.pitch
Diamond-like.carbon
Pros:
.faithful.replica.of.the.natural.
nanostructure.and.optical.characteristics
Cons:
.time.consuming
Watanabe.et.al..
(2005b)
Solution.casting
Phosphor.wing.with.structural.features.at.
precision.of.100.nm
Y
2
O
3
:Eu
3+
.or.TiO
2
:Eu
3+
.
phosphor.precursor.
solutions
Pros
:.simple.process;.low.cost
Cons
:.lack.of.photonic.properties
Silver.et.al..
(2005)
ALD
Al
2
O
3
.“Christmas.tree”.structures
Pure.Al(CH
3
)
3
.(TMA).
and.deionized.water.
as.precursors
Pros
:.faithful.replica.of.wing.structures.and.
photonic.properties;.low.cost;.tunable.
structural.colors;.deposition.of.other.materials
Cons
:.dificulty.in.mass.production.and.
controllability.of.colorations
Huang.et.al..
(2006).and.Liu.
et.al..(2011,.
2012a)
ALD
Ti
2
O
3
.wing.(50.nm.thick)
Ti
2
O
3
Pros
:.conformal.deposition;.low.cost
Cons
:.unable.to.accurately.replicate.the.internal.
multilayer.structure.on.a.large.surface.area
Gaillot.et.al..
(2008)
Self-assembly,.
sputtering.and.
ALD
Multilayer.concavities.(∼4.5.μm.in.
diameter.and.2.3.μm.in.height)
TiO
2
.and.Al
2
O
3
Pros
:.mimicking.the.color.mixing.effect.and.
enhanced.optical.properties
Cons
:.multiple.steps
Kolle.et.al..(2010)
Soaking.method
ZnO.microtube.wing.
ZnO.single.wing.scale
Zn(NO
3
)
2
Pros
:.adjustable.structures
Cons
:.the.process.condition.needs.to.be.carefully.
controlled
Zhang.et.al..
(2006).and.Chen.
et.al..(2011)
Sol-gel.process
SnO
2
.replicas.of.longitudinal.uniform-
spaced.ridges.and.parallel.lamellae.of.
four.shelves.(34.nm.thick.SnO
2
.layer.with.
hollow.interior.of.90-100.nm.in.diameter)
Sn-colloid
Pros
:.well-organized.hierarchical.structures;.
high.sensitivity;.enhanced.UV.relection
Cons
:.the.process.condition.needs.to.be.carefully.
controlled
Song.et.al..(2009,.
2011)
Hydrothermal.
process
CdS.wing.Fe
3
O
4
.wing
EDTA/DMF,.CdC
l2
.
and.Na
2
S.EDTA/
DMF,.FeSO
4
.and.H
2
O
2
Pros
:.hierarchial.architecture;.simple.and.
low-cost.process;.incorporation.of.nano-Fe
3
O
4
.
into.the.biomimetic.wing
Cons:
.low.relection.of.the.resulted.Fe
3
O
4
.wing
Han.et.al..(2009).
and.Peng.et.al..
(2011)
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