Enhanced fluorescence from semiconductor quantum dot-labelled cells excited at 280 nm
Enhanced fluorescence from semiconductor quantum dot-labelled cells excited at 280 nm
复制标题
半导体量子点标记细胞在 280 nm 激发时发出增强的荧光
DOI:
10.1101/2021.11.08.467709
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
McFarlane M
中科院分区:
文献类型:
--
作者:
McFarlane M
Semiconductor quantum dots (QDs) have significant advantages over more traditional fluorophores used in fluorescence microscopy including reduced photobleaching, long-term photostability and high quantum yields, but due to limitations in light sources and optics, are often excited far from their optimum excitation wavelengths in the deep-UV. Here, we present a quantitative comparison of the excitation of semiconductor QDs at a wavelength of 280 nm, compared to the longer wavelength of 365 nm, within a cellular environment. We report increased fluorescence intensity and enhanced image quality when using 280 nm excitation compared to 365 nm excitation for cell imaging across multiple datasets, with a highest average fluorescence intensity increase of 3.59-fold. We also find no significant photobleaching of QDs associated with 280 nm excitation and find that on average,∼ 80% of cells can tolerate exposure to high-intensity 280 nm irradiation over a 6-hour period.
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