发光
材料科学
纳米晶
纳米棒
镧系元素
聚乙烯醇
光子晶体
纳米技术
光子学
兴奋剂
光电子学
化学
有机化学
复合材料
离子
作者
Yuxia Luo,Zhuo Chen,Ping He,Qingdi Liu,Zemin He,Yuzhen Zhao,Hao Ma,Liyi Li,Zhao Zhang,Xinping Li,Qing Han
标识
DOI:10.1016/j.ijbiomac.2022.11.178
摘要
A new design for chiral photonic cellulose nanocrystal films was developed by co-assembling lanthanide-doped nanorods (NRs) into chiral cellulose nanocrystals, in which the photonic band gap (PBG) could be tuned in the visible range by changing the mass fraction of flexible agents, such as polyvinyl alcohol (PVA) and ethylene glycol (EG). Due to the PBG effect, the luminescence modulation in such nanocrystal films had been realized. The down-conversion luminescence from NaGd30Y60F4:5%Tb3+, 5%Eu3+ NRs and up-conversion luminescence from NaGd40Y40F4:18%Yb3+, 2%Er3+ NRs could be enhanced by 28 % and 18 % respectively, on account of the band edge effect. The luminescence would be inhibited when the luminescence overlapped with the stop band of the PBG. These results implied that the biocompatible photonic cellulose nanocrystal films are ideally suited for applications in optical coding, optical resonators and biocompatible lasers.
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