Introduction to Nanotechnology: Properties, Applications, and Challenges, Study notes of Applied Chemistry

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INTRODUCTION

New Materials/ Nanomaterials

Dr. Suchismita Acharya

After completion, students would be able to: ❖ explore fundamental concept of nanotechnology ❖ explore material property changes with scale down ❖ explore applications of nanotechnology in several fields ❖ explore challenges in nanotechnology

1. Classification of nanomaterials
2. Properties of nanomaterials
3. Carbon based nanomaterials
4. Nanotechnology applications for the human health improvement
5. Nanotechnology for consumer goods
6. Nanotechnology applications for water treatment and energy
7. Nanotechnology for agriculture, fishery, animal farming and food processing
8. Nanotechnology challenges: potential risk for nanomaterials Objectives Summary of course contents

Typical Size of Small Materials

What’s interesting in nanomaterials ➢ Very small size ➢ High specific surface area ➢ Deep access to cell and organelles ➢ Altered Physical properties ➢ Altered Chemical properties Nanomaterials compositions Composed of various types of elements such as carbons, various metals, ceramic, polymers etc. A. Combinations of elements can make up nanomaterial grains such as titanium carbide, zinc sulfide etc. B. Allows construction of new materials such as C 60 (BuckyBalls or fullerenes) and nanotubes Nanomaterials classifications: Based on location Nanomaterials may be categorized into three main categories: ✓ Materials that are nanostructured in the bulk; ✓ Materials that have nanostructure on the surface; ✓ Materials that contain nanostructured particles 1996 Nobel Prize in Chemistry

One dimensional (1-D)

nanomaterials

• One dimension that is outside the nanoscale;
• 1 - D nano-materials include nanotubes, nanorods, and nanowires ≤ nm > nm Nanotube or nanorod

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