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. 2014 Dec 10;9:666. doi: 10.1186/1556-276X-9-666

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© Ke et al.; licensee Springer. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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Absorption and fluorescence spectra, normalized absorbance, and fluorescence spectra. (a) Absorption and fluorescence spectra of AlC₄Pc; (b) normalized absorbance of AuNRs@SiO₂-AlC₄Pc with different shell thickness; and (c) fluorescence spectra of original AlC₄Pc and every supernatant. Inset: fluorescence standard curve of AlC₄Pc over the concentration range 1 to 20 μM.