nanofibers for applications in mems, nanotechnology, biotechnology and medicine
TRANSCRIPT
NANOFIBERS FOR APPLICATIONS IN MEMS ,
NANOTECHNOLOGY ,
BIOTECHNOLOGY AND MEDICINE
•High tensile strength stronger than steel (on weight basis )
•High extensibility comparable to rubber (elasticity)
NANOFIBERS (Definition)
NANOFIBERS
Electrospinning of Polymers
3000
0 V
olt
Electrospinning of nanofibers
30,000 Volt
SEM image of electrospun PET fibers. Fiber diameters are in the range of 1.5 - 4
10 micron
Electron micrograph of 300 nm polybenzimidazole
nanofibers
Woven polyester shirt fabric
Nanofibers have large surface area per gram
Research Goals:
*Investigation of Nanofibers Mechanical Properties
*Advanced process control – “writing with fiber”
Potential Uses of nanofibers
Protective Clothing
Solar Sail Comet
Solar sail freight arriving on Mars
Leaf with nanofiberscontaining pesticide
Nanofibers as a physical barrier to insects
Bridge with nanofibers (Dupont)
Fiber Optic - nanofibers
Braid of aligned nanofibers. Density100nfs/m2
Several aligned nanofibers
Nanofiber after burnout
Super conductive nanofibers (Poly- acrylic acid + Salts)
Conductive nanofibers (PEDOT/PEO)
Current-Voltage Response
Nanofiber nonwoven fabric
Soft-tissue biomedical applications
A microelectrode records the firing of individual cells in a monkey's visual cortex