1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Radiativelifetime-encodedunicolour securitytags using perovskitenanocrystals Sergii YakuninJana ChaabanBogdan M. Benin2021 год

Radiative lifetime-encoded unicolour security tags using perovskite nanocrystals
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: Abstract Traditional fluorescence-based tags, used for anticounterfeiting, rely on primitive pattern matching and visual identification; additional covert security features such as fluorescent lifetime or pattern masking are advantageous if fraud is to be deterred. Herein, we present an electrohydrodynamically printed unicolour multi-fluorescent-lifetime security tag system composed of lifetime-tunable lead-halide perovskite nanocrystals that can be deciphered with both existing time-correlated single-photon counting fluorescence-lifetime imaging microscopy and a novel time-of-flight prototype. We find that unicolour or matching emission wavelength materials can be prepared through cation-engineering with the partial substitution of formamidinium for ethylenediammonium to generate “hollow” formamidinium lead bromide perovskite nanocrystals; these materials can be successfully printed into fluorescence-lifetime-encoded-quick-read tags that are protected from conventional readers. Furthermore, we also demonstrate that a portable, cost-effective time-of-flight fluorescence-lifetime imaging prototype can also decipher these codes. A single comprehensive approach combining these innovations may be eventually deployed to protect both producers and consumers.
Год издания: 2021
Авторы: Sergii Yakunin, Jana Chaaban, Bogdan M. Benin, Ihor Cherniukh, Caterina Bernasconi, Annelies Landuyt, Yevhen Shynkarenko, Sami Bolat, Christoph K. Hofer, Yaroslav E. Romanyuk, Stefano Cattaneo, Sergey I. Pokutnyi, Richard D. Schaller, Maryna I. Bodnarchuk, Dimos Poulikakos, Maksym V. Kovalenko
Издательство: Nature Portfolio
Источник: Nature Communications
Ключевые слова: Perovskite Materials and Applications, Luminescence and Fluorescent Materials, Quantum Dots Synthesis And Properties
Другие ссылки: Nature Communications (PDF)
Nature Communications (HTML)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
Repository for Publications and Research Data (ETH Zurich) (PDF)
Repository for Publications and Research Data (ETH Zurich) (HTML)
DORA Empa (Swiss Federal Laboratories for Materials Science and Technology (Empa)) (PDF)
DORA Empa (Swiss Federal Laboratories for Materials Science and Technology (Empa)) (HTML)
PubMed Central (HTML)
PubMed (HTML)