1. Done by Glenn Chua 3P305

2. NANOPARTICLES Brief Introduction

3. N ANOPARTICLE Sized between 1 and 100 nanometers (10 −9 m) Nanoparticles may or may not exhibit size- related properties that differ significantly from those observed in fine particles or bulk materials

4. N ANOMATERIAL Brief Introduction

5. N ANOMATERIAL Materials Science-based approach to nanotechnology Studies materials with morphological features on the nanoscale

6. N ANOMATERIAL Various materials

7. N ANOGOLD Also known as colloidal gold

8. N ANOGOLD ( PROPERTIES ) Colloidal gold is a suspension of sub micrometre sized particles of gold in a fluid. The liquid is usually red or a dirty yellowish, depending on size of particles, with red being for <100nm and dirty yellowish for larger particles.

9. N ANOGOLD (U SAGE ) Due to the unique optical, electronic and molecular-recognition properties of gold nanoparticles, they are the subject of substantial research, with applications in electron microscopy as well as in health and medical applications.

10. N ANOGOLD (U SAGE ) Electron microscopy  Colloidal gold particles can be attached to many traditional biological probes  Particles of different size are easily distinguishable in electron micrographs, allowing simultaneous multiple labelling experiments.

11. N ANOGOLD (U SAGE ) Health and medical applications  Therapy for rheumatoid arthritis in rats  Relieves pain with implantation near arthritic joints  Combination of microwave radiation and colloidal gold can destroy beta-amyloid fibrils and plaque associated with Alzheimer's disease  Investigated as carriers for drugs such as Paclitaxel  Cancer research, where it can be used to target tumors.

12. S ILVER NANOPARTICLES

13. S ILVER NANOPARTICLES ( PROPERTIES ) 1nm-100nm in size Some silver are composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms.

14. N ANOGOLD (U SAGE ) Bone cement Surgical instruments Surgical masks Wound dressings Treatment of HIV-1 Found in products by Samsung, called Silver Nano Used as the cathode in silver oxide battery

15. I RON N ANOPARTICLES Nanoscale Iron particles

16. I RON NANOPARTICLES ( PROPERTIES ) Highly reactive because of large surface area Rapidly oxidizes in presence of oxygen and water to form free ions

17. I RON NANOPARTICLES (U SAGE ) Remediation of industrial sites contaminated with chlorinated organic compounds Widely used in medical and laboratory applications

18. P LATINUM N ANOPARTICLES

19. P LATINUM N ANOPARTICLES ( PROPERTIES ) Usually in the form of a suspension or colloid Size ranges between 2-3 nm Trillions of platinum nanoparticles are suspended in brownish red or black coloured colloidal solution.

20. P LATINUM N ANOPARTICLES (U SAGE ) Has antioxidant properties, are the subject of substantial research with applications in a wide variety of areas  Medicine  Synthesis of novel materials with unique properties

21. R EFERENCES http://en.wikipedia.org/wiki/Nanotechnology http://en.wikipedia.org/wiki/Nanomaterials http://en.wikipedia.org/wiki/Nanogold http://en.wikipedia.org/wiki/Silver_nanoparticles http://en.wikipedia.org/wiki/Platinum_nanopartic les http://en.wikipedia.org/wiki/Nanoscale_iron_parti cles

22. T HANK YOU I hope you have enjoyed my presentation!