Developing Hollow-Channel Gold Nanoflowers as Trimodal Intracellular Nanoprobes.
Developing Hollow-Channel Gold Nanoflowers as Trimodal Intracellular Nanoprobes.
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DOI:
10.3390/ijms19082327
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发表时间:
2018-08-08
影响因子:
5.6
通讯作者:
Evans SD
中科院分区:
文献类型:
--
作者:
Ye S;Wheeler MC;McLaughlan JR;Tamang A;Diggle CP;Cespedes O;Markham AF;Coletta PL;Evans SD
Gold nanoparticles-enabled intracellular surface-enhanced Raman spectroscopy (SERS) provides a sensitive and promising technique for single cell analysis. Compared with spherical gold nanoparticles, gold nanoflowers, i.e., flower-shaped gold nanostructures, can produce a stronger SERS signal. Current exploration of gold nanoflowers for intracellular SERS has been considerably limited by the difficulties in preparation, as well as background signal and cytotoxicity arising from the surfactant capping layer. Recently, we have developed a facile and surfactant-free method for fabricating hollow-channel gold nanoflowers (HAuNFs) with great single-particle SERS activity. In this paper, we investigate the cellular uptake and cytotoxicity of our HAuNFs using a RAW 264.7 macrophage cell line, and have observed effective cellular internalization and low cytotoxicity. We have further engineered our HAuNFs into SERS-active tags, and demonstrated the functionality of the obtained tags as trimodal nanoprobes for dark-field and fluorescence microscopy imaging, together with intracellular SERS.
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