Assembling cellulose nanocrystals (CNCs) can induce photonic emission. It is free of photobleaching and aggregation-induced quenching, which has great potential in the application of information security. However, the emission suffers a low emission quantum yield (EQY), and the assembly mediate (solvents) can affect the assembly or the emission. Herein, we established a strategy of nanoscale assembly to integrate emission enhancement methods and improve the assembly induced emission. Via controlling the CNC assembly in the nanoscale space of metal-organic frameworks (MOFs), the EQY of CNC array primarily increased by 50 %. When carbon nanodots were further incorporated in MOF, their plasmonic resonance could enhance the emission coupling rate and offset the loss in emission intensity from the extinction of MOF particles, leading to a 6.9-time increase in EQY (to 64.84 %). Such a high EQY from two emission enhancement mechanisms make this nanomaterial able to hide and present photonic information effectively.

组装纤维素纳米晶体（CNC）可以诱导光子发射。它没有光漂白和聚集引起的猝灭，在信息安全的应用中具有巨大的潜力。但是，发射的发射量子产率（EQY）较低，并且组装介质（溶剂）会影响组装或发射。在这里，我们建立了一种纳米组装的策略，以整合发射增强方法并改善组装引起的发射。通过控制金属有机框架（MOF）纳米级空间中的CNC组装，EQYCNC阵列的数量主要增加了50％。当将碳纳米点进一步掺入MOF时，它们的等离子体共振可以提高发射耦合速率并抵消由于MOF颗粒消失而导致的发射强度损失，从而使EQY增加6.9倍（至64.84％）。来自两种发射增强机制的如此高的EQY使这种纳米材料能够有效地隐藏和呈现光子信息。