题目内容
Unbound engineered nanoparticles are engineered nanomaterials that, under normal temperature and pressure conditions, are contained within a matrix that would reasonably be expected to prevent the particles from being separately mobile and a potential source of exposure.
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In 1887, Michael Faraday discovered colloidal "ruby" gold, demonstrating that nanostructured gold under certain lighting conditions produced different-colored solutions.
In 1957, John Bardeen, William Shockley, and Walter Brattain at Bell Labs discovered the semiconductor transistor and greatly expanded scientific knowledge of semiconductor interfaces, laying the foundation for electronic devices and the Information Age.
In 1984, Tokyo Science University Professor Norio Taniguchi coined the term 'nanotechnology' to describe precision machining of materials to within atomic-scale dimensional tolerances.
In 1988, the Russian scientist Alexei Ekimov discovered nanocrystalline, semiconducting quantum dots in a glass matrix and conducted pioneering studies of their electronic and optical properties.
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