Abstract In this study, halloysite nanotubes (HNTs) were modified with three xanthene dyes and subsequently utilized for the fabrication of luminescent polymer nanocomposites. Two different sets of dyes (rhodamine B, rhodamine 6G, and fluorescein) were chosen because of their ability to interact differently with HNTs. Rhodamines B and 6G were adsorbed on the negatively charged external surface of HNTs due to their cationic nature, while fluorescein was infiltrated into the positively charged nano-size lumen of HNTs. The influence of the HNTs substrate on photoluminescence (PL) of the dyes in the polystyrene matrix was investigated. An enhancement in the PL intensity of fluorescein by a factor of 8 was observed upon its encapsulation into lumens of HNTs. On the other hand, the adsorption of rhodamines on HNTs led to a decrease in their PL intensity. A homogenous dispersion of the dye molecules achieved at nanoscale introduced luminescence properties in the polymer nanocomposites. The robust protocol for the modification of halloysites with organic chromophores provides a straightforward way to distribute the dye molecules in a polymer matrix and to incorporate luminescent properties into different polymer matrices.

中文翻译：

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呫吨染料改性埃洛石纳米管（HNTs）及其在发光聚合物纳米复合材料中的应用

摘要 在这项研究中，埃洛石纳米管 (HNTs) 用三种呫吨染料改性，随后用于制备发光聚合物纳米复合材料。选择了两组不同的染料（罗丹明 B、罗丹明 6G 和荧光素），因为它们能够与 HNT 进行不同的相互作用。罗丹明 B 和 6G 由于其阳离子性质被吸附在 HNTs 的带负电荷的外表面上，而荧光素则渗透到 HNTs 带正电荷的纳米管腔中。研究了 HNTs 底物对聚苯乙烯基质中染料的光致发光 (PL) 的影响。在将荧光素封装到 HNT 的管腔中后，观察到荧光素的 PL 强度增强了 8 倍。另一方面，罗丹明在 HNT 上的吸附导致其 PL 强度降低。在纳米级实现的染料分子的均匀分散在聚合物纳米复合材料中引入了发光特性。用有机发色团对埃洛石进行改性的稳健方案提供了一种直接的方法来将染料分子分布在聚合物基质中并将发光特性纳入不同的聚合物基质中。