Development of plasmonic thin-layer chromatography for size-selective and optical-property-dependent separation of quantum dots
Development of plasmonic thin-layer chromatography for size-selective and optical-property-dependent separation of quantum dots
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DOI：
10.1038/s41427-022-00414-3
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发表时间：
2022-07
影响因子：
9.7
通讯作者：
T. Torimoto;N. Yamaguchi;Yui Maeda;Kazutaka Akiyoshi;T. Kameyama;T. Nagai;T. Shoji;Hidemasa Yamane-Hidem
中科院分区：
文献类型：
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作者：
T. Torimoto;N. Yamaguchi;Yui Maeda;Kazutaka Akiyoshi;T. Kameyama;T. Nagai;T. Shoji;Hidemasa Yamane-Hidem
在当前技术中，纳米物体，如量子点（QDs），是构建功能材料和器件的基本单元。建立一个通用方案，从原始产品中分类所需的成分，对于充分发挥原始材料的潜力至关重要。然而，基于尺寸分离具有相同组成的量子点以及对具有相同尺寸但光学性质不同的量子点进行分类仍然具有挑战性。在这里，我们首次将等离子体光学捕获与薄层色谱（TLC）相结合，这是一种广泛使用的工具。固定在TLC板上的金纳米粒子的局部表面等离子体共振的LED光激发影响了量子点移动的距离，这取决于辐照光的波长和强度，从而根据量子点的大小和/或光学性质导致清晰的分离。由于传统色谱法无法实现基于光学性质的分离，在传统色谱法中，色谱仪的固定相与量子点之间的相互作用仅仅基于量子点的大小或表面功能的差异，因此本策略将是建立一种通用的纳米物体分选方案的关键解决方案。
Nano-objects, such as quantum dots (QDs), are essential units for the construction of functional materials and devices in current technologies. The establishment of a versatile scheme to sort desired components from a crude product is crucial for bringing out the full potential of the original materials. However, it is still challenging to separate QDs with the same composition on the basis of size and to sort QDs with the same size but different optical properties. Here, we demonstrate such sorting for the first time by combining plasmonic optical trapping with thin-layer chromatography (TLC), which is a widely used tool. LED photoexcitation of the localized surface plasmon resonance of Au nanoparticles immobilized on a TLC plate affected the distance QDs traveled depending on the wavelength and intensity of irradiated light, which led to clear separation according to the size and/or optical properties of the QDs. Since optical property-based separation cannot be achieved by conventional chromatography, in which the interactions between stationary phases of chromatographs and QDs are simply based on differences in the size or surface functionality of the QDs, the present strategy will be a key solution for the establishment of a versatile scheme for sorting nano-objects.