journal article·2025-03-25

Dynamic Chirality in Nature-Inspired Photonic Crystal Films: Ultralong Room Temperature Phosphorescence and Stimuli-Responsive Circularly Polarized Luminescence

Xiaolin Nie, Yue Zhang, Bo Wu, Ziyue Ye, Feng Gao, Yixuan Chen, Chunfeng Wang, Deliang Zhu, Parvej Alam, Zijie Qiu, Ben Zhong Tang

ACS Nano· Volume 19· Issue 11
Publisher page

Abstract

Circularly polarized luminescence (CPL) systems exhibiting room-temperature phosphorescence (RTP) are attracting considerable attention for applications in information encryption and smart sensing. However, achieving ultralong circularly polarized RTP (CPRTP) with tunable chirality and stimuli-responsive CPL remains challenging. Inspired by the color-changing properties of the Troides magellanus butterfly, we developed a cellulose nanocrystal (CNC)-based photonic crystal film with an ultralong RTP lifetime of 2.04 s. The helical pitch of photonic crystal film could be engineered by adding different amounts of glucose, leading to 3-fold and 4-fold enhancement of the phosphorescence and fluorescence quantum yields, respectively, compared to the samples without glucose. The system exhibited green afterglows lasting over 4 s and tunable photonic bandgap (PBG) that modulated chiroptical properties, achieving high g lum values of −0.749 for fluorescence and −0.650 for phosphorescence. Additionally, the film demonstrated stimuli-responsive features such as humidity-responsive RTP and solvent-responsive CPL. Therefore, the biomimetic photonic crystal film offers promising opportunities for multilevel anticounterfeiting, information security, and smart sensing applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Photonic Crystals and Applications · Luminescence and Fluorescent Materials · Photoreceptor and optogenetics research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology

The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen)

Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering

Shenzhen University

Clinical Translational Research Center of Aggregation-Induced Emission, School of Medicine, The Second Affiliated Hospital

Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China

Funding

Science and Technology Foundation of Shenzhen City · Basic and Applied Basic Research Foundation of Guangdong Province · Science, Technology and Innovation Commission of Shenzhen Municipality · Innovation and Technology Commission · National Natural Science Foundation of China · Shenzhen Key Laboratory of Functional Aggregate Materials · Key Research and Development Project of Yunnan Province

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