Smart Nanocellulouse Paper with Embedded Printed Near Infrared Emitters for Security and Medical Applications******

我们与1-Material合作的目的是利用喷墨打印来展示智能透明纳米纤维素纸，它能够存储只能在发光光谱的近红外区域显示的特定信息，这是肉眼看不到的区域。喷墨允许按需在基材(纳米纤维素纸或其他基材)上的任何指定位置打印近红外油墨。打印的图像可以从特定的安全特征到隐形安全批次的个人照片。该打印方法允许在设计安全特征以及通过控制打印油墨的浓度和厚度来控制光发射水平(光致发光)时不受限制地自由。这不可能通过任何其他打印技术以像喷墨打印的情况那样容易和成本高效的方式实现。近红外发射器将从1-材料中获得，并优化为用于喷墨和R2R打印的墨水配方。我们提议的实验工作结果将不断与1-Material共享，以指导其近红外发射器的优化，并针对特定的技术应用开发新的发射器。

Our aim in this collaboration with 1-Material is to utilize inkjet printing in order to demonstrate smart transparent nanocellulose paper capable of storing particular information that can only be revealed in the NIR region of the light emission spectra, a region invisible to the unaided eye. Inkjet allows for printing the NIR ink-on-demand and at any specified location on the substrate (nanocellulose paper or other substrates). The printed images can vary from particular security features to human photos of individuals for invisible security batches. This printing approach allows for unlimited freedom in the design of a security feature as well as controlling the level of light emission (photoluminescence) through controlling the concentration and thickness of the printed ink. This is not possible by any other printing technique with such ease and cost-effective manner as is the case with inkjet printing. The NIR emitters will be obtained from 1-Material and optimized into an ink formulation for both inkjet and R2R printing. Our results from the proposed experimental work will be constantly shared with 1-Material in order to orient the optimization of their NIR emitters and develop new ones targeting specific technological applications.