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The enhanced 1830 nm emission in Yb/Tm:NaYF4@NaYF4 active-core/inert-shell nanocrystals
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文摘
The strong 1830 nm emission is realized in Yb/Tm:NaYF4@NaYF4 nanocrystals. The optimal Tm3+ concentration and shell thickness are 2 mol% and 6.5 nm. The emission intensity enhances about 160 times after coating NaYF4 shell.

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