1. Applications
1.1. umbrella
1.1.1. engineered to repel water
1.2. tennis rackets
1.2.1. Higher strength and stiffness, durability, reduced weight and abrasion resistance in sporting equipments
1.3. condom
1.3.1. It can be used to build unbreakable condom and decrease rates of unwanted pregnancy and infection transmission
1.4. medicine
1.4.1. It can greatly reduce the damage treatment such as chemotherapy does to a patient's healthy cells.
1.5. solar cell
1.5.1. Reduced manufacturing and installation costs
1.5.2. Nanotechnology solar cells are not as efficient as traditional ones.
2. basic information
2.1. size
2.1.1. 1 nanometer = 1 billion meter
2.1.2. A sheet of newspaper is about 100,000 nanometers thick
2.2. definition
2.2.1. Nanotechnology is the engineering of functional systems at the molecular scale.
3. advantages
3.1. water purification
3.2. Reduce the use of energy and resource
3.2.1. better insulation systems ---> the use of more efficient lighting or combustion systems --->use of lighter and stronger materials in the transportation sector
3.3. medical
3.3.1. faster and more accurate surgeries
3.3.2. tailoring drugs at molecular level---> less side effects
3.3.3. fixed the damaged genes ---> heal genetic condition
3.4. environmental
3.4.1. increased durability of materials against mechanical stress or weathering
3.4.1.1. Eg. water-resistant coatings to reduce cleaning efforts
3.4.1.2. Eg. adding nanoparticles to a material to reduce weight and save energy during transport
3.5. computing
3.5.1. nanocrystals give substantially richer, more vivid colors for television screens and computer monitors
4. disadvantages
4.1. lack of employment in the fields of traditional farming and manufacturing and industrial sector
4.2. increase the fall of certain markets like diamond and oil
4.2.1. Reason
4.2.1.1. the low value of diamond and oil
4.3. increase risk to the health
4.3.1. Reason
4.3.1.1. small size of nanoparticles can cause inhalation problem and many other fatal diseases