Nanotechnology Demystified by Linda D. Williams

By Linda D. Williams

Wake up to hurry on nanotechnology and the numerous organic, chemical, actual, environmental, and political features of this constructing technology.

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So you see factors of a 1000 between sugar and bacteria, another 1000 to the ant, and another 1000 to the child. In other words, a nanometer is about 1/(1000 ϫ 1000 ϫ 1000) times smaller than we are. Yet scientists can control the structure and properties of such small items and create new things out of them! STANDARDS Observation and measurement are the keys to science and engineering. In research, as in other parts of life, we are constantly measuring using common units. The baseball cleared the fence by a foot.

Scientists discovered that at the nanoscale, size matters! 1 nm wide. So, 1 nm is almost equal to 10 hydrogen atoms, stretched end to end. ) This subatomic world can’t be seen by the naked eye because it’s super small! CHAPTER 2 Nanoscale Table 2-2 Metric Prefix exa peta tera giga 25 Most scientific data is reported in terms of metric measurements Multiples of Ten Number Name 1,000,000,000,000,000,000 quintillion 15 1,000,000,000,000,000 quadrillion 12 1,000,000,000,000 trillion 9 1,000,000,000 billion 6 1018 10 10 10 mega 10 1,000,000 million kilo 103 1000 thousand 10 1 milli Ϫ3 1/1000 thousandth Ϫ6 10 micro 10 1/1,000,000 millionth nano 10Ϫ9 1/1,000,000,000 billionth pico 10Ϫ12 femto atto 1/1,000,000,000,000 trillionth Ϫ15 1/1,000,000,000,000,000 quadrillionth Ϫ18 1/1,000,000,000,000,000,000 quintillionth 10 10 Size matters because the properties of nanomaterials can be uniquely different from properties of materials in bigger bulk forms.

Add bacteria and improper handling techniques to this vast surface area and it can lead to botulism (courtesy of Clostridium botulinum bacteria) or other toxins. You eat it, you die (without treatment, that is; death is caused by suffocation from neurotoxin effects). So when researchers make things such as detectors or catalysts with nanomaterials, they get materials that are much, much more efficient because there’s so much more surface area to work with. It’s another major benefit that makes the nanoscale special.

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