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8/10/2019 Gamma Nbjnm anobiomimetics
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Nano-Biomimetics
Team
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Nano-biomimetics?
What is nano-biomimetics?
Biological self-assembly
Viral assembly Gecko Feet
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What is nano-biomimetics?
Utilizes biological mechanisms to create
materials
Mimicking biological self-assembly processes
Using single biological units as a building block
along with inorganic materials
Mimics biology at the molecular level
Synthesizing structures that mimic biological
structures
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Utilizing biological mechanisms
Atom-precise manipulation yields composite
materials and nano-scale structures with
desirable properties
Parallel self-assembly processes achieve
precision with high speed and reproducibility
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Biological self-assembly
Bottom-up fabrication process
Continuing miniaturization of devices in
nanotechnology
Nature already assembles its smallest
components into ordered structures
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Biological self-assembly: applications
Genetically Engineered Proteins for Inorganics
(GEPIs)
Methods
Biopatterning
Neuron growth on patterned substrates
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Biological self-assembly: applications
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Viral assembly: biology
Abalone shell mostly
chalk, but 3000x
stronger because of
crystal structure Very difficult to
assemble crystals,
requires precise
control in 3-D
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Viral assembly: biomimetic
Genetically engineered
virus attaches to
molecule of building
material Viruses orient
themselves in solution,
producing well-ordered
liquid crystal
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Viral assembly: applications
Procedure can easily scale up
Multiple applications
Better materials
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Mimicking biological structures
Top-down approach using lithography,
scanning probes, CVD, sputter coating, and
many other techniques normally unassociated
with biology
Requires very precise manipulation
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Gecko feet: biology
Millions of hairs
called setae
Fiber radius is
nanometer-scale Adhesion due to
van der Waals
and capillary
forces
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Gecko feet: biomimetic
Use electron beam
lithography and dry
etching to create
synthetic polymer hairs Attach to flexible base
Palm-sized piece can
support a human
QuickTime and a
TIFF (LZW) decompressorare needed to see this picture.
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Gecko feet: applications
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Nano-biomimetics!
Create materials with novel properties
Synthesize existing bio-materials in larger
quantities
Integrate biomolecules and materials with
inorganic ones for hybrid systems
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References
Bio-assembly
Sarikaya, Mehmet. "Moleucular biomimetics: nanotechnology through biology. Nature Materials Sept. 2003.
Gyorvary, Erika S. "Biomimetic Nannostructure Fabrication: Nanolithographic Lateral Patterning and Self-Assemblyof Functional Bacterial S-Layers at Silicon Supports." 11 Dec. 2002. Nano Letters. Vol. 3. 2004. 315+
Zhang, Shuguang. "Fabrication of novel biomaterials through molecular self-assembly." Nature biotechnology Oct.2003.
Quinion, Michael. "Turns of Phrase: Biomimetics." World Wide Words. 22 Nov. 1997..
Viral Assembly:
http://www.sunlandimports.com http://www.sciencemag.org/cgi/content/full/296/5569/892
http://www.pnas.org/cgi/content/full/100/12/6946
http://web.mit.edu/giving/spectrum/fall05/building_on_nature.html
http://pubs.acs.org/cgi-bin/sample.cgi/nalefd/2004/4/i01/html/nl0347536.html
Gecko foot:
http://www.andrew.cmu.edu/user/gshah/Project_modeling.htm
http://photos.wildmadagascar.org/images/uroplatus_fimbriatus-0143.shtml
http://www.houstonvoice.com/2004/6-18/view/actionalert/action.cfm http://onnes.ph.man.ac.uk/nano/Publications/Naturemat_2003.pdf
Spiderman: http://spiderman.sonypictures.com