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Man and the Environment

Man and the Environment. Nanotechnology. Presented by: Ang Kai En Faith Teo Hu Yang Huang Jia Can. Overview. Introduction History Current Development Impacts Examples Implications Conclusion. Introduction.

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Man and the Environment

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  1. Man and the Environment Nanotechnology Presented by: Ang Kai En Faith Teo Hu Yang Huang Jia Can

  2. Overview • Introduction • History • Current Development • Impacts • Examples • Implications • Conclusion

  3. Introduction • —Nanotechnology is defined as the study and use of structures between 1 nanometer and 100 nanometers in size in at least one dimension. • A nanometer is a billionth of a meter, or about ten atoms

  4. History

  5. History

  6. Impacts of Nanotechnology Positive • Allows for clean ways to produce energy • Allows for eco-friendly fuel e.g. hydrogen-powered fuel cells • Allows for electronic devices to be smaller and more efficient • Nanoporous materials can be used for water-filtration and liquid separation

  7. Impacts of Nanotechnology (contd.) Negative • In differents parts of the particle's life cycle, the particle acts differently, which we do not know clearly. That may be a threat to humans and the environment eg. radiation • In their free form, nanoparticles has the potential to cause bioaccumulation in plants and fungi

  8. Impacts of Nanotechnology (contd.) Negative • In their fixed form, they have to be disposed, increasing the amount of trash • As with all fields of Science, Nanotechnology can be exploited or used destructively, for example weapons or a deadly virus.

  9. Current Development • DNA Nanotechnology • Smaller Electronic Circuits • Trojan horse-like structures to improve drug delivery to cancerous cells • Electrically conductive gold nanowires • Graphene (stronger than diamond) - video

  10. Current Development • Programmable molecular robots (Nano Cars) • Single molecule sensors and switches

  11. Examples of products made from nanotechnology contd. Cottons • Nano-Tex researchers attached molecular structures to cotton fibres, resulting in a barrier that causes liquids to bead up and prevents absorption. • It only requires a thin application and lasts longer than conventional waxes. • Treated threads repel stains like coffee and are also wrinkle and crease resistant.

  12. Examples of products made from nanotechnology contd. Sunglasses • Nanofilm has been producing protective and anti-reflective polymer coatings for sunglasses. • This improves the lens' responsiveness to different light intensities and also repels grime and skin oils

  13. Implications • Helps man create new materials with two or more other materials • Helps improve a material's

  14. 6th to 10th 6. Nanotech DVD and Book Collection 7. Performance Sunglasses 8. Nanocrystalline Sunscreen 9. High-Tech Tennis Rackets 10.High-Tech Tennis Balls

  15. References • forbes.com • wikipedia.org • google.com • docs.google.com • All other websites that have helped us in some way or another.

  16. The End Thank You for Your Attention!

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