11月2日VOA聽力：高清顯微鏡摸索微型天下
Modern microelectronic devices contain billions ofcomponents crammed into thumbnail-size flakes. Thechemical industry uses nanoparticles to make bettercleaning products, while pharmaceutical companiesuse them for delivery of medicines straight intohuman cells.
Scientists at the Luxembourg Institute of Science and Technology list for short combined aspecially designed spectrometer with a commercially available helium ion microscope to build avery high-resolution optical device capable of looking into these tiny worlds.
We can follow where those nanoparticles have been uptaken into, for example, human cells. Andalso we can see whether or not a labeled drug is present within the cell, in the same place asthe nanoparticle. So we can really start to test whether or not a delivery system is effective.
One of the first practical uses was checking the effectiveness of new cosmetic products. Forinstance, the new microscope helped scientists test the shampoos containing silvernanoparticles, which are highly toxic to bacteria living in human hair.
We can also analyze the hair as well to see whether the shampoo, for example, penetrates justonto the outside or to see how deeply it's penetrated.
Researchers say the new microscope could also find applications in the development of moreefficient batteries for electric cars and portable electronic devices.
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