Bright and Multicolor Chemiluminescent Carbon Nanodots for Advanced Information Encryption

• Published in: Advanced science Vol. 6; no. 11; pp. 1802331 - n/a
• Main Authors: Shen, Cheng‐Long, Lou, Qing, Lv, Chao‐Fan, Zang, Jin‐Hao, Qu, Song‐Nan, Dong, Lin, Shan, Chong‐Xin
• Format: Journal Article
• Language: English
• Published: Germany John Wiley & Sons, Inc 05.06.2019; John Wiley and Sons Inc; Wiley
• Subjects: Alcohol; Carbon; carbon nanodots; Chemical reactions; chemiluminescence; Chromatography; Data encryption; encryption; Energy; energy level alignment; Fourier transforms; multicolor emission; Nanomaterials; Nanoparticles; Spectrum analysis; carbon nanodots; encryption; energy level alignment; multicolor emission; chemiluminescence
• ISSN: 2198-3844; 2198-3844
• DOI: 10.1002/advs.201802331

The various luminescent properties of carbon nanodots (CDs) reveal fascinating applications in several areas. Here, bright and multicolor chemiluminescence (CL) is realized from CDs, whose CL quantum yield can be optimized by adjusting the energy level alignment between the CDs and 1,2‐dioxetanedione intermediate generated from the reaction of peroxalate and hydrogen peroxide. A CL quantum yield of 9.32 × 10−3 Einsteins mol−1, maximal luminance of 3.28 cd m−2, and lifetime of 186.4 s are achieved in red CDs, all of which are the best values ever reported for CDs. As a proof‐of‐concept prototype, a high‐quality information encryption strategy is established via CD based CL imaging techniques by virtue of the high brightness and multicolor CL. Bright and Multicolour Chemiluminescence (CL) based on carbon nanodots (CDs) are developed by chemically initiated electron exchange luminescence. The CD based CL systems exhibit quantum yields up to 9.32 × 10‐3 Einsteins mol‐1, luminance up to 3.28 cd m‐2 and lifetimes up to 186.4 s. Information encryption and multicolour anti‐counterfeiting with active luminescence are demonstrated by the CL system.