论文标题
来自光学对偶性银纳米结构的大性荧光由3D激光打印启用
Great Chiral Fluorescence from Optical Duality Silver Nanostructures Enabled by 3D Laser Printing
论文作者
论文摘要
三维（3D）激光打印技术在跨维程度上产生复杂的立体结构方面具有突出的灵活性和忠诚度，已大大扩展了该工具包，用于提供多种功能设备。然而，手性纳米仪属于人造结构，这些结构同时表现出有效的发射和紧密限制的轻度互动，但目前对这一技术而言仍然具有巨大的挑战。在这项工作中，我们断言手性光致发光是通过光学对偶性的银纳米结构实现的，它通过两倍的三维激光打印方案进行。这种激光打印方案可以通过同时产生均匀分布的荧光银纳米簇和聚合的等离子银纳米颗粒来紧密地限制纳米级的手性相互作用，从而允许高度期望的双重性。构造的550 nm螺旋直径的螺旋发射极具有创纪录的发光各向异性因子，其绝对值高达0.58，这是两个比荧光性手性银簇大两个数量级。这种方法对在椎体纳米版本中的将来的多功能应用具有巨大的希望。
Featured by prominent flexibility and fidelity in producing sophisticated stereoscopic structures transdimensionally, three-dimensional (3D) laser printing technique has vastly extended the toolkit for delivering diverse functional devices. Yet chiral nanoemitters heavily resorting to artificial structures that manifest efficient emission and tightly confined light-mater interactions simultaneously remains alluring but dauntingly challenging for this technique at this moment. In this work, we assert the chiral photoluminescence is implemented from silver nanostructures of optical duality in one go via a twofold three-dimensional laser printing scheme. Such laser printing protocol allows the highly desired duality by simultaneously producing uniformly distributed fluorescent silver nanoclusters and aggregated plasmonic silver nanoparticles to tightly confine chiral interactions at the nanoscale. A helical emitter of 550 nm-helix-diameter as fabricated has seen a record-high luminescence anisotropic factor with the absolute value up to 0.58, which is two orders of magnitude greater than fluorescent chiral silver clusters. This method holds great promise for future versatile applications in chiroptical nanodevices.
