Photothermal-enhanced synthetic melanin inks for near-infrared imaging

Photothermal-enhanced synthetic melanin inks for near-infrared imaging
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用于近红外成像的光热增强合成黑色素墨水

DOI:
10.1016/j.polymer.2019.122042
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发表时间:
2020-01
期刊:
影响因子:
4.6
通讯作者:
Li Yiwen
Li Yiwen
中科院分区:
化学2区
文献类型:
--
作者:
Zou Yuan;Wu Tong;Li Ning;Guo Xutong;Li Yiwen

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合成黑色素由于其超高的反射率和黑度以及在水溶液中良好的稳定性等有前景的特性而被越来越多地开发为一类新型功能性墨水材料。虽然合成黑色素的光热转换特性备受关注,但其相对较低的近红外 (NIR) 光吸收限制了其作为 NIR 成像墨水的进一步应用。在此,我们开发了一系列掺杂不同种类金属离子的合成黑色素纳米颗粒(SMNP)墨水,发现与未掺杂的样品相比,所有产品都表现出增强的光吸收能力和总光热效应。有趣的是,还发现这些性能随着金属离子浓度的增加而相应提高。这项研究不仅提供了对具有增强光热效应的负载金属离子的 SMNP 的全面了解,而且为制造用于近红外成像应用的新型 SMNP 墨水铺平了道路。
Synthetic melanin has been increasingly exploited as a new class of functional ink materials due to its promising properties such as ultrahigh reflective index and blackness, and good stability in aqueous solution. Whilst the promising photothermal conversion feature of synthetic melanin has been well devoted, the relatively low near-infrared (NIR) light absorption limited their further application as the NIR imaging inks. Herein, we developed a series of synthetic melanin nanoparticles (SMNPs) inks doped with different kinds of metal ions and found that all the products exhibited enhanced light absorption ability and total photothermal effect compared to the undoped sample. Interestingly, it was also found that these properties could be improved correspondingly with the increase of metal ion concentration. This study not only provides a comprehensive understanding of the metal ion-loaded SMNPs with enhanced photothermal effect, but also paves the way towards fabricating new SMNP inks for NIR imaging applications.
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