Shi Haidong, Zhu Jiaxin, Deng Yaxuan, Yang Yanling, Wang Changxing, Liu Yihan, Zhang Wanlong, Luo Dan, Chen Da, Shi Yue
School of Physical Science and Technology, Ningbo University, Ningbo, Zhejiang 315211, China.
Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
Nanophotonics. 2024 Jun 3;13(19):3679-3688. doi: 10.1515/nanoph-2024-0091. eCollection 2024 Aug.
Circularly polarized light emitting active materials are of great interest, and the convenient tuning of the circularly polarized luminescence (CPL) remains a significant challenge. Integrating fluorescent materials into chiral photonic crystals to achieve tunable CPL is a promising approach, allowing efficient manipulation of CPL by adjusting the photonic band gap (PBG). We combined carbon quantum dots (CQDs) with hydroxypropyl cellulose (HPC), which self-assembles into a cholesteric liquid crystal (CLC). The helical structure can selectively reflect right circularly polarized (RCP) light, achieving strong circular dichroism (CD) and high CPL dissymmetry factor . In addition, the chiral template is thermo-responsive. The CPL wavelength can be adjusted by regulating the PBG position through temperature adjustment, while the chirality of CPL keeps high especially in the heating process. This work enables stimuli-responsive manipulation of CPL under one template through temperature regulation, which may open up enormous possibilities for the cellulose-based material in different areas.
圆偏振发光活性材料备受关注,而圆偏振发光(CPL)的便捷调谐仍然是一项重大挑战。将荧光材料整合到手性光子晶体中以实现可调谐CPL是一种很有前景的方法,通过调节光子带隙(PBG)可以有效地操纵CPL。我们将碳量子点(CQD)与羟丙基纤维素(HPC)相结合,后者自组装成胆甾相液晶(CLC)。螺旋结构可以选择性地反射右旋圆偏振(RCP)光,实现强圆二色性(CD)和高CPL不对称因子。此外,手性模板具有热响应性。通过温度调节来调节PBG位置,可以调整CPL波长,而CPL的手性保持较高,尤其是在加热过程中。这项工作通过温度调节实现了在一个模板下对CPL的刺激响应操纵,这可能为纤维素基材料在不同领域开辟巨大的可能性。