Gamma Nbjnm anobiomimetics

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

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Gamma Nbjnm anobiomimetics