Introduction Current world is comprising of nanotechnology. All the laboratoriesin the world concern with the nanotechnology application. In biological world the nanotechnology plays a vital role for thebetterment of the works. Mainly in the sector of genetics the carbon nano tube is widely used.
4What is carbon nanotube: A tube shaped material, made of carbonhaving a diameter measuring on thenanometer scale.1nm = 10-9m
10Applications of Carbonnanotubes:General applications are: Conductive plastic Structural composite materials Flat-panel displays Gas storage Antifouling paint Micro- and nano electronocs Radar absorbing coating Technical Textiles Ultra-capacitor Batteries with improved lifetime. Extra strong fibers.
11Biological Applications ofCarbonnanotubes: Atomic Force Microscope (AFM) Tips Biosensors for Harmful gases DNA Sequencing
Biological applications: Bio-sensing Many spherical nano-particles have beenfabricated for biological applications. Nanotubes offer some advantages relativeto nanoparticles by the following aspects:1. Larger inner volumes – can be filled with chemical orbiological species.2. Open mouths of nanotubes make the inner surfaceaccessible.3. Distinct inner and outer surface can be modifiedseparately.
13Biological applications: AFM tipsCarbon nanotubes as AFM probe tips:1. Small diameter – maximum resolution2. Excellent chemical and mechanical robustness3. High aspect ratioResolution of ~ 12nm is achieved
14Biological applications:Functional AFM tipsMolecular-recognition AFM probe tips: Certain bimolecular is attached to the CNT tip This tip is used to study the chemical forces betweenmolecules – Chemical force microscopy
15Biological applications: DNA sequencing Nanotube fits into themajor grove of the DNAstrand Apply bias voltageacross CNT, differentDNA base-pairs giverise to different currentsignals With multiple CNT, it ispossible to do parallelfast DNA sequencingTop view and side view of theassembled CNT-DNA system
16Future Applications Future applications:1. Already in product: CNT tipped AFM2. Big hit: CNT field effect transistors based nano electronics.3. Futuristic: CNT based OLED, artificial muscles….
17Conclusion: By the application of carbon nanotubes we can developthe biological research work to such an extent that it canleads our life style beyond the imagination.
18Challenges: Challenges1. Manufacture: Important parameters are hard to control.2. Large quantity fabrication process still missing.3. Manipulation of nanotubes.