The document discusses the history and applications of nanoscience and nanotechnology. It notes that while the core concepts date back to the 1950s, the field has grown rapidly in recent years. Some key applications mentioned include using nanomaterials for medical diagnosis and drug delivery, water purification, toxicity detection, and to improve display and audio devices. Nanotechnology is also being used and explored in chemistry, defense, and other fields, but it remains an expensive technology with potential pollution and health risks due to the small size of nanomaterials.

2.  What is NANO SCIENCE ?
 What is NANO TECHNOLOGY ?

5.  Nano technology has huge historical
background although it got its speed in the
recent years .
 The core concepts were introduced in the early
50’s .
 The first ever concept was presented in 1959 by
the famous professor of physics Dr. Richard
P.Feynman while explaining the creation of
molecular machines with accurate atomic
precision.

6.  MEDICAL APPLICATIONS
 Diagnosis
 Drug delivery
 Miniatured Mechanical surgery

8.  ATOMIC FORCE MICROSCOPE
 Configured and manupulated at nano
scale
Used to measure the particles of an element
or material at the smallest level i.e at nano
metres
Ex: identification of cancer and other fatal
bacterias.

9.  WATER PURIFICATION
 Nano materials can purify water upto 99.9% with out
affecting the original flavour of water.
 Nano filtration plants are present in the developed
countries of the world.

10.  TOXICITY DETECTORS
 These detectors detect the toxic chemicals and the
measurement of concentrated substances in the
environment.
 These detectors are very useful and beneficial for the
chemists in order to manage and reduce the toxicity of
chemicals.

11.  DISPLAY AND AUDIO DEVICES
 “Nano pixelation” make the picture feel real.
 Frequency modulation in audio devices can be
now digitized to Billionth bit of signals.
Ex: LCD’s and LED’s

12.  CHEMISTRY
 Exploring new Chemical reactions .
 Can study atoms and molecules more and more
effectively at nano scale
 Properties of different substances can be found

14.  DEFENCE APPLICATIONS
 Can be used as Spying Instruments.
 Reduces the loss of Life and Property.
 Reduces Man power in war.

16.  Lack of employment in the fields of traditional
farming ,manufacturing and industrial sector.
 At present Nano technology is most EXPENSIVE
technology.
 Nano Pollution
 Nano bots can cause eventual health problems in
the bodies of consumers who use them because of
their small size.