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l_tian

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[×ÊÔ´] ×î½üһƪ¹â´ß»¯TiO2 NATURE NANOTECHNOLOGY

ͬÑù¶¼ÊÇ×öµÄTiO2¹â´ß»¯£¬2011Äê³öÁËһƪºÚÉ«TiO2µÄscience£¬2012ÄêÓÖÓÐnature chemistryµÄAu-TiO2µÄ¹â´ß»¯¡£ÏÖÔÚÓÖ³öÁËһƪ¹ØÓÚTiO2 µÄNATURE NANOTECHNOLOGY¡£Ò²²»ÖªµÀÓÐûÓÐÈË·¢£¬Ò²²»×öÌ«¶àÆÀÂÛÁË£¬¾ÍÈÃÎÒÃÇÐÀÉÍÒ»ÏÂѧÊõ´ó¼ÒÃǵÄѧÊõ˼·ÓëÔìÒè°É¡£
Solar conversion to electricity or to fuels based on electron¨C
hole pair production in semiconductors is a highly evolved
scientific and commercial enterprise1¨C10. Recently, it has been
posited that charge carriers either directly transferred from
the plasmonic structure to a neighbouring semiconductor
(such as TiO2) or to a photocatalyst, or induced by energy
transfer in a neighbouring medium, could augment photoconversion
processes, potentially leading to an entire new paradigm
in harvesting photons for practical use11¨C16. The strong
dependence of the wavelength at which the local surface
plasmon can be excited on the nanostructure makes it possible,
in principle, to design plasmonic devices that can harvest
photons over the entire solar spectrum and beyond. So far,
however, most such systems show rather small photocatalytic
activity in the visible as compared with the ultraviolet17¨C26.
Here, we report an efficient, autonomous solar water-splitting
device based on a gold nanorod array in which essentially all
charge carriers involved in the oxidation and reduction
steps arise from the hot electrons resulting from the
excitation of surface plasmons in the nanostructured gold.
Each nanorod functions without external wiring, producing
531013 H2 molecules per cm2 per s under 1 sun illumination
(AM 1.5 and 100 mWcm22), with unprecedented long-term
operational stability.
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  • ¸½¼þ 1 : An_autonomous_photosynthetic_device_in_which_all.pdf
  • 2013-05-26 17:58:07, 1.23 M

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