Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance, Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain.
IMDEA Materials, Institute C/Eric Kandel, 2, Tecnogetafe, 28906 Madrid, Spain.
Nano Lett. 2020 Apr 8;20(4):2710-2716. doi: 10.1021/acs.nanolett.0c00324. Epub 2020 Mar 16.
This work presents a simple in situ synthesis and stabilization of fluorescent gold nanoclusters (AuNCs) with different sizes using engineered protein scaffolds in water. The protein-AuNC hybrids show a dual emission (450 and 700 nm) with a record photoluminescence quantum yield of 20%. These features impelled us to apply them to biohybrid light-emitting diodes as color down-converting filters or biophosphors. Efficient white emission (x/y CIE color coordinates of 0.31/0.29) and stabilities of more than 800 h were achieved. This represents a 2 orders of magnitude enhancement compared to the prior art. Besides the outstanding performance, the protein scaffold also infers a unique anisotropic emission character that is considered as a proof-of-concept of high interest for single-point lighting and display.
这项工作提出了一种简单的原位合成和稳定的荧光金纳米簇（AuNCs），使用工程蛋白支架在水中进行。蛋白-AuNC 杂化物表现出双发射（450nm 和 700nm），具有创纪录的光致发光量子产率为 20%。这些特性促使我们将其应用于生物混合发光二极管作为颜色下转换滤波器或生物荧光粉。实现了高效的白色发射（x/y CIE 颜色坐标为 0.31/0.29）和超过 800 小时的稳定性。这与现有技术相比提高了两个数量级。除了出色的性能，蛋白质支架还推断出一种独特的各向异性发射特性，这被认为是单点照明和显示的高关注度的概念验证。
