Observations of intracellular second-harmonic generation imaging in black phosphorus nanosheets

Observations of intracellular second-harmonic generation imaging in black phosphorus nanosheets
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黑磷纳米片细胞内二次谐波产生成像的观察

DOI:
10.1142/s1793545820410060
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发表时间:
2021-03
影响因子:
2.5
通讯作者:
Qu Junle
Qu Junle
中科院分区:
医学3区
文献类型:
--
作者:
Peng Xiao;Song Yiwan;Peng Zheng;Nie Kaixuan;Liu Hao;Zhou Yingxin;Zhou Feifan;Yuan Yufeng;Song Jun;Qu Junle

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功能化黑磷(BP)纳米片由于其优异的光热转换效率而被认为是有希望的癌症治疗纳米药物。然而,仍然难以视觉监测BP纳米剂在癌细胞中的动态定位。在本文中,我们系统地研究了剥离BP纳米片的二次谐波产生(SHG)信号。有趣的是,在950 nm的高频脉冲激光激发下,BP纳米片在体外的SHG信号几乎检测不到,因为它们的稳定性差。然而,由于活的HeLa细胞的有效富集,来自BP纳米片的细胞内SHG信号可以通过体内光学成像来测量。此外,BP纳米片的SHG信号强度随着孵育时间的延长而增加。可以预期,BP纳米片可能是一种有前途的细胞内SHG纳米探针,用于实际癌症光热治疗(PIT)中的视觉体内生物医学成像。
Functionalized black phosphorus (BP) nanosheets have been considered as promising nanoagents in cancer therapy due to their excellent photothermal conversion efficiency. However, it is still difficult to visually monitor the dynamic localization of BP nanoagents in cancer cells. In this paper, we systematically studied the second-harmonic generation (SHG) signals originating from exfoliated BP nanosheets. Interestingly, under the excitation of a high frequency pulsed laser at 950 nm, the SHG signals of BP nanosheets in vitro are almost undetectable because of their poor stability. However, the intracellular SHG signals from BP nanosheets could be measured by in vivo optical [Formula: see text]imaging due to the efficient enrichment of living HeLa cells. Moreover, the SHG signal intensity from BP nanosheets increases with the prolonged incubation time. It can be expected that the BP nanosheets could be a promising intracellular SHG nanoprobe employed for visually in vivo biomedical imaging in practical cancer photothermal therapy (PIT).
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发表时间: 2018-01
期刊: Journal of materials chemistry. B
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