Construction of White-Light-Emitting Silk Protein Hybrid Films by Molecular Recognized Assembly among Hierarchical Structures
writer：Naibo Lin, Fan Hu, Yilin Sun, Chenxu Wu, Hongyao Xu*, Xiang Yang Liu*,
keywords：silk
source：期刊
specific source：Adv. Funct. Mater., 2014, 24 (33): 5284-5290
Issue time：2014年
The fabrication of bio-hybrid functional fi lms is demonstrated by applying a materials assembly technique. Based on the hierarchical structures of silk fibroin materials, functional molecular/materials, i.e., quantum dots (QDs),
can be fi xed to amino acid groups in silk fi broin fi lms. It follows that white-light-emitting QD silk hybrid fi lms are obtained by hydrogen bond molecular recognition to the –COO – groups functionalized to blue luminescent ZnSe
(5.2 nm) and yellow luminescent CdTe (4.1 nm) QDs in a molar ratio of 30:1 of ZnSe to CdTe QDs. Simultaneously, a systematic blue shift in the emission peak is observed from the QD solution to QDs silk fibroin films. The significant blue shift hints the appearance of the strong interaction between QDs and silk fi broins, which causes strong white-light-emitting uniform silk films. The molecular recognized interactions are confi rmed by high resolution transmission electron microscopy, fi eld scanning electron microscope, and attenuated total internal refl ectance Fourier transform infrared spectroscopy. The QD silk fi lms show unique advantages, including simple preparation, tunable white-light emission, easy manipulation, and low fabrication costs, which make it a promising candidate for multicomponent optodevices.