Nucleation Temperature‐Dependent Synthesis of Polytypic CuInSe 2 Nanostructures with Variable Tetrapod‐Like and Core‐Shell Morphologies

Nucleation Temperature‐Dependent Synthesis of Polytypic CuInSe 2 Nanostructures with Variable Tetrapod‐Like and Core‐Shell Morphologies
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成核温度依赖性合成具有可变四足形和核壳形貌的多型 CuInSe 2 纳米结构

DOI:
10.1002/cnma.202200112
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发表时间:
2022-05
期刊:
影响因子:
3.8
通讯作者:
Andrey L. Rogach
Andrey L. Rogach
中科院分区:
材料科学4区
文献类型:
--
作者:
Fei Huang;Jiajia Ning;Jianjun Tian;Andrey L. Rogach

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尽管具有低毒性和近红外光谱吸收/发射的优点,但多型cuinse2纳米晶体的合成仍然具有挑战性。在此,我们展示了一种合成方法来生产具有可变形态的多型cuinse2纳米晶体,例如具有短臂或长臂的四足动物;核/壳纳米结构;以及由于柯肯代尔效应而形成的空心结构。在这项工作中实现的所有多型cuinse2纳米结构都由黄铜矿相的核和纤锌矿相的臂或壳组成。随着成核温度的升高,由于成核和生长的竞争,黄铜矿岩心尺寸逐渐增大,而臂或壳变小/变薄。本研究为制备尺寸和形貌可调的多型cuinse2纳米晶体提供了指导,丰富了现有的cuinse2纳米结构家族。
Despite the merits of low toxicity and light absorption/emission in the near‐infrared spectral range, synthesis of polytypic CuInSe2nanocrystals is challenging. Herein, we demonstrate a synthetic approach to produce polytypic CuInSe2nanocrystals with variable morphologies, such as tetrapods with short or long arms; core/shell nanostructures; and hollow structures formed due to the Kirkendale effect. All polytypic CuInSe2nanostructures realized in this work consist of a core with a chalcopyrite phase, and arms or shells with a wurtzite phase. With increasing nucleation temperature, the size of the chalcopyrite core gradually increases, while the arms or shells become smaller/thinner, due to the competition between nucleation and growth. This work provides guidance towards the synthesis of polytypic CuInSe2nanocrystals with tunable size and morphology, and enriches the family of available CuInSe2nanostructures.
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