By Sunil Bhardwaj

602 Views


#Top Down ApproachBottom Up Approach
1It involves the particle size reduction to nano sizeThis involves the growth of nanoparticles from atomic size particles.
2The process is used only for hard, brittle materialsThe process is used for gas, liquids and solids as well.
3All particles of the precursor may not break down to the required particle size.More control over particle size.
4The nanocrystalline materials prepared by this process maybe contaminated by milling tools and atmosphere.Less chances of contaminations.
5Ex. Ball Milling, Ex. Sol gel method, Gas condensation method
MCQ on Nanomaterials from Engineering Chemistry
Prof. Gianfranco Coletti

Shared publicly - 2019-08-23 00:00:00

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Prof. Maheshwar Sharon

Shared publicly - 2019-08-24 00:00:00

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to

sunil

Shared publicly - 2023-02-28 11:09:52

this is

ss

Shared publicly - 2023-02-28 10:48:10

gsgsg

Latest News

  • Become an Instructor 4 March, 2018

    Apply to join the passionate instructors who share their expertise and knowledge with the world. You'll collaborate with some of the industry's best producers, directors, and editors so that your content is presented in the best possible light..

More Chapters

  • Electrochemistry
  • Nanomaterials
  • Lubricants
  • Other Subjects

  • English
  • Applied Physics
  • Environmental Studies
  • Physical Chemistry
  • Analytical Chemistry
  • Organic Chemistry
  • Soft Skills
  • Engineering Drawing
  • General Medicine
  • Mathematics
  • Patente B Italia
  • Adult Education
  • Engineering Chemistry
  • Conceptual Physics
  • Aptitude