NANOTECHNOLOGY FINAL

Views:
 
Category: Entertainment
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

Slide 1:

VIGNESH KUMAR BALASUBRAMANIAN 3/5/2015 1 VIGNESH KUMAR BALASUBRAMANIAN

welcome:

welcome 3/5/2015 2 VIGNESH KUMAR BALASUBRAMANIAN

Slide 3:

“There is Plenty of Room at the Bottom” 3/5/2015 3 VIGNESH KUMAR BALASUBRAMANIAN

Slide 4:

3/5/2015 4 VIGNESH KUMAR BALASUBRAMANIAN

NANOTECHNOLOGY:

NANOTECHNOLOGY VIGNESH KUMAR BALASUBRAMANAIN M.SC BOTANY 1 ST YEAR 3/5/2015 5 VIGNESH KUMAR BALASUBRAMANIAN

NANOTECHNOLOGY:

NANOTECHNOLOGY Nano – SI Greek – dwarf Materials, structures and devices that have dimensions lying in the nano scale range are encompassed within nanosciences Multidisciplinary - physics and engineering - chemistry and biology - science, and even philosophy 3/5/2015 6 VIGNESH KUMAR BALASUBRAMANIAN

The United States’ National Nanotechnology Initiative website (http://www.nano.gov) defines nanotechnology as:

The United States’ National Nanotechnology Initiative website (http://www.nano.gov) defines nanotechnology as “The understanding and control of matter at dimensions of roughly 1 to 100 nm, where unique phenomena enable novel applications.” USA - 3.7 billion $ European Union - 1.2 billion $ Japan - 750 million $ 3/5/2015 7 VIGNESH KUMAR BALASUBRAMANIAN

OBJECTS WITH DIFFERENT DIMENSIONS:

OBJECTS WITH DIFFERENT DIMENSIONS 3/5/2015 8 VIGNESH KUMAR BALASUBRAMANIAN

Slide 9:

3/5/2015 9 VIGNESH KUMAR BALASUBRAMANIAN

Slide 10:

3/5/2015 10 VIGNESH KUMAR BALASUBRAMANIAN

History of nanotechnology:

History of nanotechnology Nobel - Richard Feynman - December 1959 - “There is Plenty of Room at the Bottom” - not just “There is Room at the Bottom” 24 encyclopedia in a pin head “at the atomic level, we have new kinds of forces, new kinds of possibilities, and new kinds of effects. The problems of manufacture and reproduction of materials will be quite different”. “ nano -technology” was first used by Norio Taniguchi in 1974 3/5/2015 11 VIGNESH KUMAR BALASUBRAMANIAN

Slide 12:

K. Eric Drexler used the term “nanotechnology” in his book Engines of Creation: The Coming Era of Nanotechnology 1986 1986, Drexler co-founded The Foresight Institute 1980s - two major discovery First - scanning tunneling microscope in 1981 Second - Buckminsterfullerene C60 or buckyball 3/5/2015 12 VIGNESH KUMAR BALASUBRAMANIAN

First milestone:

First milestone Gerd Binnig and Heinrich Rohrer at IBM* Zurich Research Laboratory -- a Nobel Prize in Physics in 1986. atomic force microscope AFM * international business management 3/5/2015 13 VIGNESH KUMAR BALASUBRAMANIAN

Slide 14:

3/5/2015 14 VIGNESH KUMAR BALASUBRAMANIAN

Second milestone:

Second milestone 1985 - Harry Kroto , Richard Smalley, and Robert Curl 1996 Nobel Prize in Chemistry graphene tubes (called carbon nanotubes and sometimes called Bucky tubes) which suggested potential applications for nanoscale electronics and devices. 3/5/2015 15 VIGNESH KUMAR BALASUBRAMANIAN

Slide 16:

3/5/2015 16 VIGNESH KUMAR BALASUBRAMANIAN

APPROACHES:

APPROACHES Bottom-up approaches - assembling structures molecule by molecule - Top-down approaches - reduction in dimensions - silicon chips 3/5/2015 17 VIGNESH KUMAR BALASUBRAMANIAN

TWO MEGA TECHNOLOGIES:

TWO MEGA TECHNOLOGIES 3/5/2015 18 VIGNESH KUMAR BALASUBRAMANIAN

BIONANOTECHNOLOGY:

BIONANOTECHNOLOGY It is defined as the application of biological molecules and systems to nanotechnology. NANOBIOTECHNOLOGY It is defined as the application of nanoparticles or nanomaterials and systems to human health. 3/5/2015 19 VIGNESH KUMAR BALASUBRAMANIAN

NANOMATERIALS:

NANOMATERIALS 3/5/2015 20 VIGNESH KUMAR BALASUBRAMANIAN

Slide 21:

3/5/2015 21 VIGNESH KUMAR BALASUBRAMANIAN

Slide 22:

3/5/2015 22 VIGNESH KUMAR BALASUBRAMANIAN

Slide 23:

3/5/2015 23 VIGNESH KUMAR BALASUBRAMANIAN

Slide 24:

3/5/2015 24 VIGNESH KUMAR BALASUBRAMANIAN

CHARACTERIZATION TECHNIQUES FOR NANOMATERIALS:

CHARACTERIZATION TECHNIQUES FOR NANOMATERIALS 3/5/2015 25 VIGNESH KUMAR BALASUBRAMANIAN

Isolation of DNA:

Isolation of DNA 3/5/2015 26 VIGNESH KUMAR BALASUBRAMANIAN

Electron Microscopy:

Electron Microscopy 1929 Ernst Ruska first electron microscope In that microscope, the sample surface was placed normal to the viewing direction, and was illuminated by an electron beam at grazing incidence angle to the surface. He obtained images of copper and gold surfaces at a magnification of only 10 times! * SEM – scanning electron microscope * TEM – tunneling electron microscpe 3/5/2015 27 VIGNESH KUMAR BALASUBRAMANIAN

Slide 28:

1938, Albert Prebus and James Hillier at the University of Toronto developed the first practical transmission electron microscope construction of the first transmission electron microscope and scanning electron microscope by von Ardenne topography, chemical composition, morphology and crystallographic structure, characterization of both organic and inorganic materials 3/5/2015 28 VIGNESH KUMAR BALASUBRAMANIAN

Scanning Electron Microscope (SEM):

Scanning Electron Microscope (SEM) tungsten 3/5/2015 29 VIGNESH KUMAR BALASUBRAMANIAN

Slide 30:

Topographical Morphological studies Multilayered materials And nanostructures Lanthanum hexaboride (lab6) or tungsten 20 ev - secondary electrons 3/5/2015 30 VIGNESH KUMAR BALASUBRAMANIAN

Transmission Electron Microscope (TEM):

Transmission Electron Microscope (TEM) cathode 3/5/2015 31 VIGNESH KUMAR BALASUBRAMANIAN

Slide 32:

Morphology, crystallography, particle size distribution, and its elemental composition Chemical and electronic structure Electron gun is a pin shaped cathode that is typically made from materials such as lab6 (lanthanum hexaboride ). 3/5/2015 32 VIGNESH KUMAR BALASUBRAMANIAN

Scanning Probe Microscopy (SPM):

Scanning Probe Microscopy (SPM) 1981 Heinrich Rohrer and Gerd Binning SPM techniques utilize a physical probe to image and measure surfaces at the level of molecules and groups of atoms. They are often employed to study forces, electrical properties, crystal structure, and interactions on surfaces. 3/5/2015 33 VIGNESH KUMAR BALASUBRAMANIAN

Slide 34:

3/5/2015 34 VIGNESH KUMAR BALASUBRAMANIAN

Mass Spectrometry:

Mass Spectrometry Mass spectrometry is an analytical technique for measuring the charge to mass ratio of ions. It is used to determine the mass 3/5/2015 35 VIGNESH KUMAR BALASUBRAMANIAN

Slide 36:

3/5/2015 36 VIGNESH KUMAR BALASUBRAMANIAN

Scanning Tunneling Microscope (STM):

Scanning Tunneling Microscope (STM) small current between the probe tip and the sample surface surface roughness, size and conformation of atoms and molecules, crystal orientations and defects to be characterized 3/5/2015 37 VIGNESH KUMAR BALASUBRAMANIAN

Slide 38:

3/5/2015 38 VIGNESH KUMAR BALASUBRAMANIAN

CONFOCAL MICROSCOPY:

CONFOCAL MICROSCOPY 3/5/2015 39 VIGNESH KUMAR BALASUBRAMANIAN

Slide 40:

To study Collidal particle Scanning speed - 512 × 512 pixel - 30 frames Marvin Minsky in 1961 Cscl 3D 3/5/2015 40 VIGNESH KUMAR BALASUBRAMANIAN

APPLICATIONS OF NANOTECHNOLOGY:

APPLICATIONS OF NANOTECHNOLOGY August 21, 2008 - Project on Emerging Nanotechnologies - over 800 manufactureridentified nanotech products are publicly available Titanium dioxide in sunscreen, cosmetics, surface coatings Nanosurgery Tissue engineering 3/5/2015 41 VIGNESH KUMAR BALASUBRAMANIAN

Slide 42:

Nanoelectronics - Circuit - minute Storage – low size maximum memory Drug delivery – liposomes – brain Nano wires Energy – nano cells Biosensores – to identify environmental pollution Nanofilters – water purification Defence – spy device, smaller and strong Explosive – more damage 3/5/2015 42 VIGNESH KUMAR BALASUBRAMANIAN

CURRENT RESEARCH:

CURRENT RESEARCH Graphical representation of a rotaxane , useful as a molecular switch. This DNA tetrahedron is an artificially designed nanostructure of the type made in the field of DNA nanotechnology. Each edge of the tetrahedron is a 20 base pair DNA double helix 3/5/2015 43 VIGNESH KUMAR BALASUBRAMANIAN

Problems of nanotechnology:

Problems of nanotechnology Nano nuclear weapons Nano pollution – dumping of nano waste Costly Time consuming process Need of highly skilled labour 3/5/2015 44 VIGNESH KUMAR BALASUBRAMANIAN

REFERENCES:

REFERENCES 3/5/2015 45 VIGNESH KUMAR BALASUBRAMANIAN

Slide 46:

http://en.wikipedia.org/w/index.php?title=Special:Book&bookcmd=download&collection_id=eded2b776f4ecd2fc76a6324be850b1c7568d964&writer=rdf2latex&return_to=Nanotechnology http://unipamplona.academia.edu/RaquelAmandaVillamizarGallardo Jeremy ramsden – nanotechnolohy – ISBN : 978-87-7681-418-2 3/5/2015 46 VIGNESH KUMAR BALASUBRAMANIAN

Slide 47:

3/5/2015 47 VIGNESH KUMAR BALASUBRAMANIAN

Slide 48:

3/5/2015 48 VIGNESH KUMAR BALASUBRAMANIAN

Slide 49:

3/5/2015 49 VIGNESH KUMAR BALASUBRAMANIAN

Slide 50:

3/5/2015 50 VIGNESH KUMAR BALASUBRAMANIAN

Slide 51:

Thank you… 3/5/2015 51 VIGNESH KUMAR BALASUBRAMANIAN

Slide 52:

3/5/2015 52 VIGNESH KUMAR BALASUBRAMANIAN

authorStream Live Help