The researchers began by making samples of one or two monolayers of PbSe quantum dots deposited on flat single-crystalline TiO2.

研究人员首先在单晶体 TiO2 平面上制作一层或两层的单分子硒化铅量子点。

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Ingredients: VE, houndfish alkyl, aloe extract, silicon-treated TIO2.

主要成分：维生素e、角鲨烷、芦荟精华、硅处理TIO2。

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TiO2 was chosen because it is readily available as single crystals and can accept electrons easily.

TiO2因为是容易获取的单晶体并有易吸收电子的特性而被选中。

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The TiO2 mixture was sprayed on 26, 000 feet of blue fabric, and HWKN principal Matthias Hollwich figures that by Sept. 8, when it's disassembled, "Wendy" will have digested the smog coughed up by the equivalent of 260 cars.

WSJ: Turning Up the Volume in Public | By Julie V. Iovine