Slide 1: PLAR - Nanotechnology Nanotechnology – an overview PL. Arunachalam, Synopsis : PLAR - Nanotechnology Synopsis Introduction
Synthesis of nanomaterials
Characterization and detection techniques
Concluding remarks DEFINITION OF NANOTECHNOLOGY : PLAR - Nanotechnology Nanotechnology is the creation of functional materials, devices, and systems through control of matter on an atomic or molecular scale.
The creation and use of structures, devices and systems that have novel properties and functions because of their small and/or intermediate size. DEFINITION OF NANOTECHNOLOGY Slide 4: BEST COMPARSION PLAR - Nanotechnology Slide 5: PLAR - Nanotechnology “ I can hardly doubt that when we have some control
of the arrangement of things ON A SMALL SCALE
we will get an enormously greater range of possible
properties that substances can have.”
….. R. FEYNMAN California Institute of Technology, December 26, 1959 atom by atom. maneuvering NANOMATERIALS – DEFN. & CLASSIFICATION : Atomic domains (grains, layers or phases) spatially confined to 100nm in at least one dimension
Zero dimension – clusters of aspect ratio 1 to infinity – Quantum dots
One dimension – Multilayers – Nanowires, CNT (Carbon nano tubes)
Two dimension – Ultrafine-grained over layers (coatings)
Three dimension – Nanophase materials PLAR - Nanotechnology NANOMATERIALS – DEFN. & CLASSIFICATION UNIQUENESS OF NANOMATERIALS : PLAR - Nanotechnology UNIQUENESS OF NANOMATERIALS Grains, pores, interface thickness and defects are of similar dimensions.
Nanomaterials have a large surface area but their volume is very small.
Improve mechanical properties (increased strength, toughness etc.,)
High melting point compounds. INTERDISCIPLINARY APPROACH REQUIRED : PLAR - Nanotechnology INTERDISCIPLINARY APPROACH REQUIRED FIELDS OF NANOTECHNOLOGY : PLAR - Nanotechnology FIELDS OF NANOTECHNOLOGY Nanotechnology Nanomedicine Nanobiotechnology Nanolithography Nanoelectronics Nanomagnetics Nano Biodevices NEMS (nano electro mechanical sys) Nano Biomimetic materials Nano Pulp & Paper Technology Applications of NanomaterialBased Products : PLAR - Nanotechnology Applications of NanomaterialBased Products Automotive industry
Electronic industry Slide 11: PLAR - Nanotechnology LOTUS – SELF CLEANING Water lily Super hydrophobicity
- Self cleaning SEM Surface roughness – Self cleaning Rinsing with water Water drops – clean surface Applications - PEACOCK FEATHER : PLAR - Nanotechnology PEACOCK FEATHER Nano structured particles Applications Colour never fade
Scratch free Cleaning surface Slide 13: PLAR - Nanotechnology Atlantic – Aprilia fuel cell bike Photovoltaic cell Fuel Cell NANOTECHNOLOGY –
FUEL CELL Hydrogen Slide 14: PLAR - Nanotechnology NANOTECHNOLOGY – COSMETIC APPLICATIONS Acne treatment Herbal liposome for cosmetic applications Before treatment After treatment Titanium oxide NANO MATERIAL - OPTICAL PROPERTIES : PLAR - Nanotechnology Gold (Bulk) Nano Gold colloids Au – Cancer Treatments Applications NANO MATERIAL - OPTICAL PROPERTIES Slide 16: PLAR - Nanotechnology NANO- TEXTILE APPLICATIONS Nano Jacket Student’s uniform Nano tie and scarf Slide 17: PLAR - Nanotechnology Synthesis of Nanomaterials Synthesis of Nanomaterials : PLAR - Nanotechnology Synthesis of Nanomaterials SYNTHESIS OF NANOMATERIALS : PLAR - Nanotechnology SYNTHESIS OF NANOMATERIALS CHARACTERIZATION AND DETECTION TECHNIQUES : PLAR - Nanotechnology CHARACTERIZATION AND DETECTION TECHNIQUES Essential requirements for the development, manufacturing and commercialization of nanomaterials is their physical, chemical and biological properties on a nanoscale level
For determination of atomic structure and chemical composition of solid or liquid nanomaterials – spectroscopic methods, X-ray and Neutron diffraction
For determination of size and shape – Electron microcopies (SEM or TEM) Slide 21: PLAR - Nanotechnology Optical Microscope Scanning Electron Microscope HIGH DEPTH OF FIELD NANOMATERIAL Slide 22: PLAR - Nanotechnology JEM-2100F TRANSMISSION ELECTRON MICROSCOPE Slide 23: PLAR - Nanotechnology WORKING PRINCIPLE OF AFM www.shef.ac.uk/~htsl/afm.htm Atomic Force Microscope CONCLUDING REMARKS : PLAR - Nanotechnology CONCLUDING REMARKS Choice of nanocrystalline or nanostrucured material
Final property requirement
Choice of a suitable process
Top down or bottom up approach
Economics or viability
Nano resisters are like papers.
. Slide 25: PLAR - Nanotechnology Thanking You pl_arun