+ All Categories
Home > Education > Nano scicece and nano particles final

Nano scicece and nano particles final

Date post: 06-May-2015
Category:
Upload: yogesh-chauhan
View: 741 times
Download: 8 times
Share this document with a friend
Description:
Basic Introduction
of 14 /14
NANOSCIENCE AND NANO PARTICLES 06/11/2022 1 BY: Chinmoy Yogesh
Transcript
Page 1: Nano scicece and nano particles final

04/11/2023 1

NANOSCIENCE AND NANO PARTICLES

BY:

Chinmoy Yogesh

Page 2: Nano scicece and nano particles final

Origin Of Nano

The origin of the the term “nano” comes from the Greek word “nanos” for dwarf, but in scientific usage, “nano” means one billionth.

One nanometer is 1/1000000000 of a meter.

Page 3: Nano scicece and nano particles final
Page 4: Nano scicece and nano particles final

NANO SCIENCE

Nano science is the study of fundamental principles of molecules and structures with at least one dimension roughly between 1 and 100 nanometers.

Page 5: Nano scicece and nano particles final

 what exactly is nanotechnology?Most definitions revolve around the study and control of phenomena and materials at length scales below 100 nm and quite often they make a comparison with a human hair, which is about 80,000 nm wide.

It seems that a size limitation of nanotechnology to the 1-100 nm range, the area where size-dependant quantum effects come to bear, would exclude numerous materials and devices, especially in the pharmaceutical area, and some experts caution against a rigid definition based on a sub-100 nm size.

Another important criteria for the definition is the requirement that the nano-structure is man-made. Otherwise you would have to include every naturally formed biomolecule and material particle, in effect redefining much of chemistry and molecular biology as 'nanotechnology.'

So nanotechnology can be defined as “The design, characterization, production, and application of structures, devices, and systems by controlled manipulation of size and shape at the nanometer scale (atomic, molecular, and macromolecular scale) that produces structures, devices, and systems with at least one novel/superior characteristic or property.”

Nano werk

Page 6: Nano scicece and nano particles final

Nanotechnology

Nanotechnology is the manipulation of matter at the nanometer scale to create novel structures, devices and systems.

Structures

(e.g.materials)

Devices (e.g.

sensors)

Systems (e.g.

NEMS)

Page 7: Nano scicece and nano particles final

History of Nanotechnology

2000 Years Ago – Sulfide nanocrystals used by Greeks and Romans to dye hair.

1000 Years Ago (Middle Ages) – Gold nanoparticles of different sizes used to produce different colors in stained glass windows.

1974 – “Nanotechnology” - Taniguchi uses the term nanotechnology for the first time.

1981 – IBM develops Scanning Tunneling Microscope.

1991 – Carbon nanotube discovered by S. Iijima

Page 8: Nano scicece and nano particles final

Nanotechnology Applications

• Carbon NanoTubes

• Medicine

• Information Technology

• Nano Robots

• Energy

Nano Transistor

Nano Filters

Aerogel

Nano Robot

Stinger: Targeted Drug Delivery

Page 9: Nano scicece and nano particles final

Nanomaterials

Nanomaterials is a field which takes a materials science-based approach to nanotechnology. It studies materials with morphological features on the nanoscale, and especially those which have special properties stemming from their nanoscale dimensions.

Page 10: Nano scicece and nano particles final

Application of nanomaterials

Sunscreens and Cosmetics. Phosphors for High-Definition TV Elimination of Pollutants. High-Sensitivity Sensors.

University of Granada (Georgia Tech Photo: Gary Meek)

Page 11: Nano scicece and nano particles final

Nanoscale Approaches and Fabrication

Top-down Approaches Bottom-up Approaches

Page 12: Nano scicece and nano particles final

Top-Down and Bottom-Up Technique

In top down technique, generally a bulk material is taken and machined it to modify into desired shape and product.

On the other hand, bottom up technique is used to build something from the basic material.

Page 13: Nano scicece and nano particles final
Page 14: Nano scicece and nano particles final

THANK YOU


Recommended