Double-Protected All-Inorganic Perovskite Nanocrystals by Crystalline Matrix and Silica for Triple-Modal Anti-Counterfeiting Codes
- 28 July 2017
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 9 (31), 26556-26564
- https://doi.org/10.1021/acsami.7b06436
Abstract
Novel fluorescence with highly covert and reliable features is quite desirable to combat the sophisticated counterfeiters. Herein, we report a simultaneously triple-modal fluorescent characteristic of CsPbBr3@Cs4PbBr6/SiO2 by the excitation of thermal, ultraviolet (UV) and infrared (IR) light for the first time, which can be applied for the multiple modal anti-counterfeiting codes. The diphasic structure CsPbBr3@Cs4PbBr6 nanocrystals (NCs) was synthesized via the typical reprecipitation method followed by uniformly encapsulation into silica microspheres. Cubic CsPbBr3 is responsible for the functions of anti-counterfeiting, while Cs4PbBr6 crystalline and SiO2 are mainly to protect unstable CsPbBr3 NCs from being destroyed by ambient conditions. The as-prepared CsPbBr3@Cs4PbBr6/SiO2 NCs possess improved stability and are capable of forming printable ink with organic binders for patterns. Interestingly, the fluorescence of diphasic CsPbBr3@Cs4PbBr6/SiO2 capsule patterns can be reversibly switched by the heating, UV, and IR light irradiation, which has been applied as triple-modal fluorescent anti-counterfeiting codes. The results demonstrate that the perovskite@silica capsules are highly promising for myriad applications in areas such as fluorescent anti-counterfeiting, optoelectronic devices, medical diagnosis, and biological imaging.Keywords
Funding Information
- Research Grants Council, University Grants Committee (5151101197)
- Ministry of Education of the People's Republic of China (30915012205, 30916015106)
- Ministry of Science and Technology of the People's Republic of China (2014CB931702, 2016YFB0401701)
- China Postdoctoral Science Foundation (2016M590455)
- Natural Science Foundation of Jiangsu Province (BK20160827)
- National Natural Science Foundation of China (5151101197, 51572128, 51672132, 61604074)
- Priority Academic Program Development of Jiangsu Higher Education Institutions
This publication has 38 references indexed in Scilit:
- Future prospects of luminescent nanomaterial based security inks: from synthesis to anti-counterfeiting applicationsNanoscale, 2016
- pH- and Temperature-Sensitive Hydrogel Nanoparticles with Dual Photoluminescence for BioprobesACS Nano, 2016
- Use of CdS quantum dot-functionalized cellulose nanocrystal films for anti-counterfeiting applicationsNanoscale, 2016
- Lithographically Encrypted Inverse Opals for Anti-Counterfeiting ApplicationsSmall, 2016
- Process control for thin organic coatings using fluorescence dyesProgress in Organic Coatings, 2015
- Inkjet printing of upconversion nanoparticles for anti-counterfeit applicationsNanoscale, 2015
- Highly luminescent dual mode rare-earth nanorod assisted multi-stage excitable security ink for anti-counterfeiting applicationsJournal of Materials Chemistry C, 2014
- A New Anti‐Counterfeiting Feature Relying on Invisible Luminescent Full Color Images Printed with Lanthanide‐Based InksAdvanced Functional Materials, 2014
- Designing lanthanide-doped nanocrystals with both up- and down-conversion luminescence for anti-counterfeitingNanoscale, 2011
- Optical Watermarking for Printed Document AuthenticationIEEE Transactions on Information Forensics and Security, 2007