Additions and corrections

Citric acid-assisted hydrothermal synthesis of α-NaYF₄:Yb³⁺,Tm³⁺ nanocrystals and their enhanced ultraviolet upconversion emissions

Tao Jiang, Weiping Qin, Weihua Di, Renyuan Yang, Deming Liu, Xuesong Zhai and Guanshi Qin

CrystEngComm, 2012, 14, 2302–2307 (DOI: 10.1039/c2ce06311e). Amendment published 7th March 2012.

The authors wish to draw to the attention of readers that reference 34 is a duplicate of reference 33 and so should be deleted from this manuscript.

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

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