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[×ÊÔ´] Nature Nanotechnology ×îÐÂÉÏת»»²ÄÁÏ·âÃæÎÄÕ£º¡°È«²ÊÉ«¡±·¢¹âÉÏת»»ÄÉÃ׿ÅÁ£

ÐÂ¼ÓÆÂ¹úÁ¢´óѧLiu Xiaogang¿ÎÌâ×éÓйØÏ¡ÍÁÉÏת»»·¢¹âÄÉÃײÄÁϵÄ×îÐÂÎÄÕ¡£½éÉÜÁËÒ»ÖÖÄܹ»Í¨¹ýÁ½ÖÖ¼¤·¢¹â£¨980 nm ºÍ 808 nm£©µÄÂö³åµ÷ÖÆ£¬´Ó¶øÊµÏÖÓÃÒ»ÖÖÄÉÃ׿ÅÁ£·¢Éä¸÷ÖÖÑÕÉ«µÄÉÏת»»·¢¹âµÄÐÂÏÖÏ󡣸ù¤×÷ͬʱ½éÉÜÁË»ùÓڸòÄÁϵÄÈ«²ÊÈýάÏÔʾ¼¼ÊõÓ¦Ó᣸оõÕ⽫³ÉΪÉÏת»»Ñо¿µÄÓÖÒ»¸öеÄÑо¿·½ÏòºÍ¿ÉÄܵÄÓ¦ÓÃ;¾¶¡£ÎÄÕ±»ÊÕ¼ÔÚ×îÐÂÒ»ÆÚµÄNature Nanotechnology ²¢±»Ñ¡Îª·âÃæÎÄÕ±¨µÀ¡£

Developing light-harvesting materials with tunable emission colours has always been at the forefront of colour display technologies. The variation in materials composition, phase and structure can provide a useful tool for producing a wide range of emission colours, but controlling the colour gamut in a
material with a fixed composition remains a daunting challenge. Here, we demonstrate a convenient, versatile approach to dynamically fine-tuning emission in the full colour range from a new class of core¨Cshell upconversion nanocrystals by adjusting the pulse width of infrared laser beams. Our mechanistic
investigations suggest that the unprecedented colour tunability from these nanocrystals is governed by a nonsteady- state upconversion process. These findings provide keen insights into controlling energy transfer in out-of-equilibrium optical processes, while offering the possibility for the construction of true three-dimensional, full-colour display systems with high spatial resolution and locally addressable colour gamut.

http://www.nature.com/nnano/journal/v10/n3/covers/index.html
Nature Nanotechnology ×îÐÂÉÏת»»²ÄÁÏ·âÃæÎÄÕ£º¡°È«²ÊÉ«¡±·¢¹âÉÏת»»ÄÉÃ׿ÅÁ£
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  • ¸½¼þ 1 : nnano.2014.317.pdf
  • 2015-03-07 10:23:42, 3.73 M

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