晶态纳米纤维素的多色圆偏振荧光性能

Multi-color Circularly Polarized Luminescence Properties of Cellulose Nanocrystal

基于晶态纳米纤维素禁带效应的圆偏振荧光能力,分别采用混合悬浮液法及多层膜叠加法拓宽了晶态纳米纤维素膜的禁带,使其禁带覆盖可见光范围,通过掺杂多色荧光体,该膜可以将自发辐射转换为高强度,右旋,多色的圆偏振荧光信号.

Multi-color circularly polarized luminescence with high luminescence dissymmetry(g lum)factors is key in photonic technologies.Leveraging on the intrinsic circular polarization ability of cellulose nanocrystals(CNC),we demonstrate that mixing of CNC suspensions,which are supersonically treated for a different period of time,provides an effective approach to produce freestanding CNC films with a broad photonic bandgap that can effectively transform spontaneous emissions to multicolor right-handed CPL signals with high g lum.We also show that lamination of multiple CNC-CdSe/ZnS films affords an easy approach to broaden photonic bangdap and ability to produce multicolor circularly polarized luminescence with high g lum.