论文标题
原始六角硼氮化硼的液体激活量子发射纳米流体传感
Liquid-activated quantum emission from pristine hexagonal boron nitride for nanofluidic sensing
论文作者
论文摘要
限制在原子量表的液体可以显示出根本新的特性。但是，只有间接和集合测量在如此极端的限制中进行，要求采用新型的光学方法，以在分子水平上进行直接成像。在这里，我们利用荧光起源于六角硼（HBN）表面的单光子发射器，用于分子成像和纳米法规限制的液体中的分子成像和传感。该发射起源于有机溶剂分子在天然表面缺陷上的化学吸收，从而通过空间相关的相邻缺陷激活在界面处揭示了界面的单分子动力学。发射极光谱进一步提供了对局部介电特性的直接读数，在纳米尺度限制下揭示了增加的介电顺序。液体激活的天然HBN缺陷已经弥合了固态纳米光子学和纳米流体之间的差距，开辟了用于纳米级传感和光荧光学的新途径。
Liquids confined down to the atomic scale can show radically new properties. However, only indirect and ensemble measurements operate in such extreme confinement, calling for novel optical approaches enabling direct imaging at the molecular level. Here, we harness fluorescence originating from single-photon emitters at the surface of hexagonal boron nitride (hBN) for molecular imaging and sensing in nanometrically confined liquids. The emission originates from the chemisorption of organic solvent molecules onto native surface defects, revealing single-molecule dynamics at the interface through spatially correlated activation of neighboring defects. Emitter spectra further offer a direct readout of local dielectric properties, unveiling increasing dielectric order under nanometer-scale confinement. Liquid-activated native hBN defects bridge the gap between solid-state nanophotonics and nanofluidics, opening new avenues for nanoscale sensing and optofluidics.
