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NANOTECHNOLOGY
Presented by Deepak Panduranga
TOPICS OF THE DAY
 Introduction
 Definition
 Timeline
 Tools & Technology
i. Carbon Nanotubes
ii. Nanorods
iii. Nanobots
 Approaches used
i. Top down
ii. Bottom up
 Materials Used
 Applications
i. Drugs
ii. Fabrics
iii. Electronics
iv. Others
 Nanotechnology in India
 Possibilities for future
 Pitfalls of Nanotechnology
NANO & TECHNOLOGY
 A Nanometre is a unit of length in the metric
system, equal to one billionth of a metre (10-9).
The words Nano and metre are taken from
Greek; Nano means “Dwarf” and Metre means
“unit of measurement” .
 Technology is defined as application of scientific
knowledge for practical purposes, especially in
industry.
*Nanometre is roughly the width of 3 or 4 atoms; the
average human hair is about 25000 nanometres
wide.
DEFINITION OF NANOTECHNOLOGY
 Nanotechnology ("nanotech") is manipulation of matter on an
atomic, molecular, and supramolecular* scale.
 Nanotechnology refers to constructing and engineering of the
functional systems at a very micro level or we can say at atomic
level.
*Supramolecular chemistry is the domain of chemistry beyond
that of molecules that focuses on the chemical systems made up
of a discrete number of assembled molecular subunits or
components.
HISTORY
 The first ever concept was
presented by Dr. Richard Philips
Feynman in 1959.
(Noble Prize in Physics - 1965)
 Invention of Scanning Tunneling
Microscope(IBM) in 1981 and discovery
of Fullerence*(C 60) (Rice and Sussex
Univ.) in 1985 led to Emergence of
Nanotechnology.
 The term Nano-technology was
coined by Japanese Professor Dr. Norio Taniguchi in 1974.
*A fullerene is a molecule of carbon in the form of a hollow
sphere, ellipsoid, tube, and many other shapes.
 “Engines of Creation” first
book on Nanotechnology by
K Eric Dexler and invention of
“Atomic Force Microscope” in
1985.
 IBM logo made with individual
atoms in 1989.
 Discovery of Carbon Nanotubes
by S. Iijima in 1991.
 First book on nanomedicine named “Nanomedicine”
by R. Freitas in 1999.
 The early 2000s also saw
the beginning of commercial
applications of nanotechnology,
although these were limited to
bulk applications of nanomaterials.
 Silver nano platforms for using
silver nano particles as an anti
bacterial agent, nano particle
based transparent sunscreens,
and carbon nanotubes for stain
resistant textiles.
Nanotechnology
Nanotechnology
Nanotechnology
TOOLS AND TECHNOLOGY
 Development of Atomic Force Microscope and
Scanning Tunneling Microscope helped in
proving theories of nanotechnology.
 This also helped in development of
nanolithographic* techniques such as
i. Optical Lithography
ii. X Ray Lithography
iii. Electron Beam Lithography(Ink Jet Printers)
*Nanolithography is the branch of nanotechnology
concerned with the study and application of
fabricating nanometer-scale structures, meaning
patterns with at least one lateral dimension between 1
and 1,000 nm.
CARBON NANOTUBE
 Carbon nanotubes (CNTs) are allotropes
of carbon with a cylindrical nanostructure.
These cylindrical carbon molecules have
unusual properties, which are valuable for
nanotechnology, electronics, optics and
other fields of materials science and
technology. Owing to the material's
exceptional strength and stiffness,
nanotubes have been constructed with
length-to-diameter ratio of up to
132,000,000:1, significantly larger than for
any other material.
 In addition, owing to their extraordinary
thermal conductivity, mechanical, and
electrical properties, carbon nanotubes find
applications as additives to various
structural materials. For instance,
nanotubes form a tiny portion of the
material(s) in some (primarily carbon fiber)
baseball bats, golf clubs, car parts or
damascus steel.
APPLICATIONS OF CARBON NANOTUBES
 Manufacture of
i. Bicycle components.
ii. Structures of Aircrafts.
iii. Satellites.
iv. Tips/Sensors of Atomic Force Microscopes.
NANORODS
 Nanorods are one morphology of nanoscale
objects. Each of their dimensions range from 1–100
nm. They may be synthesized from metals or
semiconducting materials. Standard aspect ratios
(length divided by width) are 3-5. Nanorods are
produced by direct chemical synthesis. A
combination of ligands* act as shape control agents
and bond to different facets of the nanorod with
different strengths. This allows different faces of the
nanorod to grow at different rates, producing an
elongated object.
*a ligand is an ion or molecule that binds to a central
metal atom to form a coordination complex.
USES OF NANORODS
One potential application of nanorods is in display
technologies, because the reflectivity of the rods can be
changed by changing their orientation with an applied
electric field. Another application is for
microelectromechanical systems (MEMS). Nanorods,
along with other noble metal nanoparticles, also function
as theragnostic agents. Nanorods absorb in the near IR,
and generate heat when excited with IR light. This
property has led to the use of nanorods as cancer
therapeutics. Nanorods can be conjugated with tumor
targeting motifs and ingested. When a patient is
exposed to IR light (which passes through body tissue),
nanorods selectively taken up by tumor cells are locally
heated, destroying only the cancerous tissue while
leaving healthy cells intact
NANOBOTS
 Nanorobotics is an emerging technology
field creating machines or robots whose
components are at or near the scale of a
nanometre. More specifically, nanorobotics
(as opposed to microrobotics) refers to the
nanotechnology engineering discipline of
designing and building nanorobots, with
devices ranging in size from 0.1–10
micrometres and constructed of nanoscale or
molecular components. The terms nanobot,
nanoid, nanite, nanomachine, or nanomite
have also been used to describe such devices
currently under research and development.
Nanotechnology
NANOTECHNOLOGY APPROACH
 There are two approaches for synthesis
of nano materials and the fabrication of
nano structures.
 Top down approach refers to slicing or
successive cutting of a bulk material to
get nano sized particle.
 Bottom up approach refers to the build
up of a material from the bottom: atom
by atom, molecule by molecule or
cluster by cluster.
 Both approaches play very important role in modern
industry and most likely in nano technology as well.
There are advantages and disadvantages in both
approaches.
 Attrition or Milling is a typical top down method in
making nano particles, where as the colloidal dispersion
is a good example of bottom up approach in the
synthesis of nano particles.
 The biggest problem with top down approach is the
imperfection of surface structure and significant
crystallographic damage to the processed patterns.
These imperfections which in turn leads to extra
challenges in the device design and fabrication. But this
approach leads to the bulk production of nano material.
Regardless of the defects produced by top down
approach, they will continue to play an important role in
the synthesis of nano structures.
 Though the bottom up approach often referred in
nanotechnology, it is not a newer concept. All the living
beings in nature observe growth by this approach only and
also it has been in industrial use for over a century.
Examples include the production of salt and nitrate in
chemical industry.
 Although the bottom up approach is nothing new, it plays an
important role in the fabrication and processing of nano
structures. There are several reasons for this and explained
as below.
 When structures fall into a nanometer scale, there is a little
chance for top down approach. All the tools we have
possessed are too big to deal with such tiny subjects.
Bottom up approach also promises a better chance to obtain
nano structures with less defects, more homogeneous
chemical composition.
 On the contrary, top down approach most likely introduces
internal stress, in addition to surface defects and
contaminations.
Nanotechnology
APPLICATIONS OF NANOTECHNOLOGY
NANOTECHNOLOGY IN THE FIELD OF
MEDICINE.
 Treatment of Cancer
 Unblocking clogged arteries:
Nanotechnology
NANOTECHNOLOGY IN TEXTILES
NANOTECHNOLOGY IN ELECTRONICS
Nanotechnology
Nanotechnology
Nanotechnology
Nanotechnology
OTHER USES
NANOTECHNOLOGY IN INDIA
 Ministry of Electronics and Information Technology
has taken a lead to promote Nanotechnology in
India.
 Dept. of Electronics and Information
Technology (DeitY) has initiated Indian
Nanoelectronics User Programme (INUP)
and established Centres of Excellence in
Nanoelectronics in IISc and IIT-B.
 About 400 researchers are being imparted
hands on training in Nanofabrication at
these centres every year.
 Following are the thrust areas identified by the
Working Group of Nanotechnology:
i. Post Moore Electronics beyond 10 nm
ii. Sensors (health, agriculture, security etc.)
iii. Organic Electronics
iv. Computational Nanoelectronics
v. Setting up prototyping and incubation
facilities for a range of devices/products
 The efforts have paid off well. India published over
23000 papers in nanoscience in the past 5 years. In
2013, India ranked third in the number of papers
published, behind only China and USA.
 There have been 300 patent applications in the
Indian Patent Office in 2013, ten times that of 2006.
 The amount India spends on nanotechnology
research is still just a fraction of the research
spending of countries like Japan, USA, France and
China.
 Only 16 papers from India appeared in the top 1% of
the publications in 2011. Also, the number of patents
applied from India to the US patent office
contributes to only 0.2% of the total applications.
 Though people look at nanoscience and technology
very positively, the number of students following
undergraduate and graduate degrees in the area is
low and career prospects still extremely limited. The
number of PhDs awarded in nanoscience and
technology is about 150 per year; a very small
number compared to the target of producing 10,000
PhD students annually over the next decade
articulated by the Ministry of Human Resource
Development.
PITFALLS OF NANOTECHNOLOGY
 Nanoparticles can get into the body through the skin , lungs
and digestive system, thus creating free radicals that can
cause cell damage.
 Once the nanoparticles are in the bloodstream, they can cross
the blood-brain barrier.
 The most dangerous applications of nanoparticles is in the
military, where Nano Bombs that contain deadly virusus
which are engineered to replicate themselves can wipe out a
community, country or an entire civilisation.
 Nanobots because of their self replicating behaviour may lead
to Grey Goo*
*Grey goo is a hypothetical end of the world scenario involving
molecular nanotechnology in which out-of-control self-
replicating robots consume all biomass on Earth while building
more of themselves, a scenario that has been called
ecophagy ("eating the environment", more literally "eating the
habitation")
CONCLUSION
“The next BIG thing is really SMALL”
SOURCES
 www.en.wikipedia.org
 www.howstuffworks.com
 www.popsci.com
 www.sciencedaily.com
 www.isro.gov.in
 www.nasa.gov
 www.iisc.ac.in
 www.iitb.ac.in
 www.meity.gov.in
 www.economictimes.com
 www.slideshare.net
 www.cancer.gov
 www.futureforall.org
 And lot more…..
Nanotechnology

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Nanotechnology

  • 2. TOPICS OF THE DAY  Introduction  Definition  Timeline  Tools & Technology i. Carbon Nanotubes ii. Nanorods iii. Nanobots  Approaches used i. Top down ii. Bottom up  Materials Used  Applications i. Drugs ii. Fabrics iii. Electronics iv. Others  Nanotechnology in India  Possibilities for future  Pitfalls of Nanotechnology
  • 3. NANO & TECHNOLOGY  A Nanometre is a unit of length in the metric system, equal to one billionth of a metre (10-9). The words Nano and metre are taken from Greek; Nano means “Dwarf” and Metre means “unit of measurement” .  Technology is defined as application of scientific knowledge for practical purposes, especially in industry. *Nanometre is roughly the width of 3 or 4 atoms; the average human hair is about 25000 nanometres wide.
  • 4. DEFINITION OF NANOTECHNOLOGY  Nanotechnology ("nanotech") is manipulation of matter on an atomic, molecular, and supramolecular* scale.  Nanotechnology refers to constructing and engineering of the functional systems at a very micro level or we can say at atomic level. *Supramolecular chemistry is the domain of chemistry beyond that of molecules that focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components.
  • 5. HISTORY  The first ever concept was presented by Dr. Richard Philips Feynman in 1959. (Noble Prize in Physics - 1965)  Invention of Scanning Tunneling Microscope(IBM) in 1981 and discovery of Fullerence*(C 60) (Rice and Sussex Univ.) in 1985 led to Emergence of Nanotechnology.  The term Nano-technology was coined by Japanese Professor Dr. Norio Taniguchi in 1974. *A fullerene is a molecule of carbon in the form of a hollow sphere, ellipsoid, tube, and many other shapes.
  • 6.  “Engines of Creation” first book on Nanotechnology by K Eric Dexler and invention of “Atomic Force Microscope” in 1985.  IBM logo made with individual atoms in 1989.  Discovery of Carbon Nanotubes by S. Iijima in 1991.  First book on nanomedicine named “Nanomedicine” by R. Freitas in 1999.
  • 7.  The early 2000s also saw the beginning of commercial applications of nanotechnology, although these were limited to bulk applications of nanomaterials.  Silver nano platforms for using silver nano particles as an anti bacterial agent, nano particle based transparent sunscreens, and carbon nanotubes for stain resistant textiles.
  • 11. TOOLS AND TECHNOLOGY  Development of Atomic Force Microscope and Scanning Tunneling Microscope helped in proving theories of nanotechnology.  This also helped in development of nanolithographic* techniques such as i. Optical Lithography ii. X Ray Lithography iii. Electron Beam Lithography(Ink Jet Printers) *Nanolithography is the branch of nanotechnology concerned with the study and application of fabricating nanometer-scale structures, meaning patterns with at least one lateral dimension between 1 and 1,000 nm.
  • 12. CARBON NANOTUBE  Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. These cylindrical carbon molecules have unusual properties, which are valuable for nanotechnology, electronics, optics and other fields of materials science and technology. Owing to the material's exceptional strength and stiffness, nanotubes have been constructed with length-to-diameter ratio of up to 132,000,000:1, significantly larger than for any other material.  In addition, owing to their extraordinary thermal conductivity, mechanical, and electrical properties, carbon nanotubes find applications as additives to various structural materials. For instance, nanotubes form a tiny portion of the material(s) in some (primarily carbon fiber) baseball bats, golf clubs, car parts or damascus steel.
  • 13. APPLICATIONS OF CARBON NANOTUBES  Manufacture of i. Bicycle components. ii. Structures of Aircrafts. iii. Satellites. iv. Tips/Sensors of Atomic Force Microscopes.
  • 14. NANORODS  Nanorods are one morphology of nanoscale objects. Each of their dimensions range from 1–100 nm. They may be synthesized from metals or semiconducting materials. Standard aspect ratios (length divided by width) are 3-5. Nanorods are produced by direct chemical synthesis. A combination of ligands* act as shape control agents and bond to different facets of the nanorod with different strengths. This allows different faces of the nanorod to grow at different rates, producing an elongated object. *a ligand is an ion or molecule that binds to a central metal atom to form a coordination complex.
  • 15. USES OF NANORODS One potential application of nanorods is in display technologies, because the reflectivity of the rods can be changed by changing their orientation with an applied electric field. Another application is for microelectromechanical systems (MEMS). Nanorods, along with other noble metal nanoparticles, also function as theragnostic agents. Nanorods absorb in the near IR, and generate heat when excited with IR light. This property has led to the use of nanorods as cancer therapeutics. Nanorods can be conjugated with tumor targeting motifs and ingested. When a patient is exposed to IR light (which passes through body tissue), nanorods selectively taken up by tumor cells are locally heated, destroying only the cancerous tissue while leaving healthy cells intact
  • 16. NANOBOTS  Nanorobotics is an emerging technology field creating machines or robots whose components are at or near the scale of a nanometre. More specifically, nanorobotics (as opposed to microrobotics) refers to the nanotechnology engineering discipline of designing and building nanorobots, with devices ranging in size from 0.1–10 micrometres and constructed of nanoscale or molecular components. The terms nanobot, nanoid, nanite, nanomachine, or nanomite have also been used to describe such devices currently under research and development.
  • 18. NANOTECHNOLOGY APPROACH  There are two approaches for synthesis of nano materials and the fabrication of nano structures.  Top down approach refers to slicing or successive cutting of a bulk material to get nano sized particle.  Bottom up approach refers to the build up of a material from the bottom: atom by atom, molecule by molecule or cluster by cluster.
  • 19.  Both approaches play very important role in modern industry and most likely in nano technology as well. There are advantages and disadvantages in both approaches.  Attrition or Milling is a typical top down method in making nano particles, where as the colloidal dispersion is a good example of bottom up approach in the synthesis of nano particles.  The biggest problem with top down approach is the imperfection of surface structure and significant crystallographic damage to the processed patterns. These imperfections which in turn leads to extra challenges in the device design and fabrication. But this approach leads to the bulk production of nano material. Regardless of the defects produced by top down approach, they will continue to play an important role in the synthesis of nano structures.
  • 20.  Though the bottom up approach often referred in nanotechnology, it is not a newer concept. All the living beings in nature observe growth by this approach only and also it has been in industrial use for over a century. Examples include the production of salt and nitrate in chemical industry.  Although the bottom up approach is nothing new, it plays an important role in the fabrication and processing of nano structures. There are several reasons for this and explained as below.  When structures fall into a nanometer scale, there is a little chance for top down approach. All the tools we have possessed are too big to deal with such tiny subjects. Bottom up approach also promises a better chance to obtain nano structures with less defects, more homogeneous chemical composition.  On the contrary, top down approach most likely introduces internal stress, in addition to surface defects and contaminations.
  • 23. NANOTECHNOLOGY IN THE FIELD OF MEDICINE.  Treatment of Cancer
  • 33. NANOTECHNOLOGY IN INDIA  Ministry of Electronics and Information Technology has taken a lead to promote Nanotechnology in India.  Dept. of Electronics and Information Technology (DeitY) has initiated Indian Nanoelectronics User Programme (INUP) and established Centres of Excellence in Nanoelectronics in IISc and IIT-B.  About 400 researchers are being imparted hands on training in Nanofabrication at these centres every year.
  • 34.  Following are the thrust areas identified by the Working Group of Nanotechnology: i. Post Moore Electronics beyond 10 nm ii. Sensors (health, agriculture, security etc.) iii. Organic Electronics iv. Computational Nanoelectronics v. Setting up prototyping and incubation facilities for a range of devices/products  The efforts have paid off well. India published over 23000 papers in nanoscience in the past 5 years. In 2013, India ranked third in the number of papers published, behind only China and USA.  There have been 300 patent applications in the Indian Patent Office in 2013, ten times that of 2006.
  • 35.  The amount India spends on nanotechnology research is still just a fraction of the research spending of countries like Japan, USA, France and China.  Only 16 papers from India appeared in the top 1% of the publications in 2011. Also, the number of patents applied from India to the US patent office contributes to only 0.2% of the total applications.  Though people look at nanoscience and technology very positively, the number of students following undergraduate and graduate degrees in the area is low and career prospects still extremely limited. The number of PhDs awarded in nanoscience and technology is about 150 per year; a very small number compared to the target of producing 10,000 PhD students annually over the next decade articulated by the Ministry of Human Resource Development.
  • 36. PITFALLS OF NANOTECHNOLOGY  Nanoparticles can get into the body through the skin , lungs and digestive system, thus creating free radicals that can cause cell damage.  Once the nanoparticles are in the bloodstream, they can cross the blood-brain barrier.  The most dangerous applications of nanoparticles is in the military, where Nano Bombs that contain deadly virusus which are engineered to replicate themselves can wipe out a community, country or an entire civilisation.  Nanobots because of their self replicating behaviour may lead to Grey Goo* *Grey goo is a hypothetical end of the world scenario involving molecular nanotechnology in which out-of-control self- replicating robots consume all biomass on Earth while building more of themselves, a scenario that has been called ecophagy ("eating the environment", more literally "eating the habitation")
  • 37. CONCLUSION “The next BIG thing is really SMALL”
  • 38. SOURCES  www.en.wikipedia.org  www.howstuffworks.com  www.popsci.com  www.sciencedaily.com  www.isro.gov.in  www.nasa.gov  www.iisc.ac.in  www.iitb.ac.in  www.meity.gov.in  www.economictimes.com  www.slideshare.net  www.cancer.gov  www.futureforall.org  And lot more…..