man and the environment

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

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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. - PowerPoint PPT Presentation

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Page 1: Man and the Environment

Man and the Environment

Presented by:Ang Kai EnFaith TeoHu Yang

Huang Jia Can

 Nanotechnology

Page 2: Man and the Environment

Overview

• Introduction• History• Current Development• Impacts• Examples• Implications• Conclusion

Page 3: Man and the Environment

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

Page 4: Man and the Environment

History

1980 •Nanotechnology began as a field.

1981•Scanning Tunneling Microscope was invented (and the creators got Nobel prizes in physics). These microscopes can 'see' objects the size of an atom, with a lateral and depth resolution of 0.1 nanometers

Page 5: Man and the Environment

History

1985 •Fullerenes were discovered. This led to several practical implications

2000-2005 •Nanotechnology gained much more attention, publicly and scientifically

2006-Present •Nanotechnology became much more precise, with the 

emergence of nanotechnological products on the market

Page 6: Man and the Environment

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

Page 7: Man and the Environment

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

Page 8: Man and the Environment

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.

Page 9: Man and the Environment

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

Page 10: Man and the Environment

Current Development

• Programmable molecular robots (Nano Cars)

•Single molecule sensors and switches

Page 11: Man and the Environment

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. 

Page 12: Man and the Environment

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

 

Page 13: Man and the Environment
Page 14: Man and the Environment

Implications

• Helps man create new materials with two or more other materials

• Helps improve a material'sCost Durability Oxidability

Buoyancy Electrical Conductivity Heat ConductivityStrength

Hardness

Density

Weight

Waterproof

Boiling / Melting Point

Flexibility

Transparency

Friction

Page 15: Man and the Environment

6th to 10th

6. Nanotech DVD and Book Collection7. Performance Sunglasses8. Nanocrystalline Sunscreen9. High-Tech Tennis Rackets10.High-Tech Tennis Balls

Page 16: Man and the Environment

References

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

Page 17: Man and the Environment

The EndThank You for Your Attention!