Phospholipid-stabilized CuxAg1−xInSe2 nanocrystals as luminophores: fabrication, optical properties, and biological application,Journal of Materials Chemistry C

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Phospholipid-stabilized CuxAg1−xInSe2 nanocrystals as luminophores: fabrication, optical properties, and biological application
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-03-18 , DOI: 10.1039/d0tc00014k
Jinhang Hu _{1,

2,

3,

4,

5} , Jiangluqi Song _{5,

6,

7,

8} , Zhishu Tang _{1,

2,

3,

4,

5} , Huan Li _{5,

6,

7,

8} , Lin Chen _{1,

2,

3,

4,

5} , Rui Zhou _{1,

2,

3,

4,

5}

Affiliation

Ternary I–III–VI semiconductor-based nanocrystals (NCs) exhibit a wide range of applications in optoelectronics, photovoltaics, and biolabeling. This motivates the in-depth study of a method to synthesize them and explore their optical properties. We present an approach for the synthesis of quaternary Cu_xAg_1−xInSe₂ (x = 0–1) NCs by means of the cation exchange reaction starting from AgInSe₂ NCs. By tailoring the thermodynamic and kinetic parameters, control over both the composition and bandgap was successfully achieved. The optical properties demonstrated significant nonlinear behavior, whereby the photoluminescence (PL) wavelength and bandgap evolved steeply for a range of x < 0.5 but became invariant when x > 0.5. Optical characterizations indicated that two distinct transition processes, i.e., donor–acceptor pair and free-to-bound recombinations dominated the PL emissions for Cu_xAg_1−xInSe₂ NCs with different x values. Furthermore, the obtained NCs were directly modified with phospholipids. In vitro experiments illustrated that the phospholipid-decorated Cu_xAg_1−xInSe₂ NCs have excellent biocompatibility and can be used as a fluorescent marker for the fast bioimaging of cancer cells and cancer stem cells in the visible and NIR regions.

中文翻译：

磷脂稳定的CuxAg1-xInSe2纳米晶体作为发光体：制备，光学性质和生物学应用

基于三元I–III–VI半导体的纳米晶体（NC）在光电子，光伏和生物标记中显示出广泛的应用。这激发了对合成它们并探索其光学性质的方法的深入研究。我们提出了一种通过从AgInSe ₂ NCs开始的阳离子交换反应来合成季铵Cu _x Ag _{1- x} InSe ₂（x = 0-1）NCs的方法。通过调整热力学和动力学参数，可以成功地实现对组成和带隙的控制。光学特性显示出显着的非线性行为，从而在x范围内，光致发光（PL）波长和带隙急剧变化<0.5，但当x > 0.5时变为不变。光学表征表明，两个不同的过渡过程，即供体-受体对和自由结合的重组，以不同的x值控制了Cu _x Ag _{1- x} InSe ₂ NC的PL发射。此外，将获得的NC直接用磷脂修饰。体外实验表明，磷脂修饰的Cu _x Ag _1-_x InSe ₂ NC具有出色的生物相容性，可以用作可见光和近红外区域中癌细胞和癌干细胞快速生物成像的荧光标记。

更新日期：2020-03-18

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