Multilevel Data Encryption Using Thermal-Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Article number | 1800795 |
Journal / Publication | Advanced Science |
Volume | 5 |
Issue number | 9 |
Online published | 31 Jul 2018 |
Publication status | Published - Sept 2018 |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85051187718&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(5a062e74-3899-4d7a-a876-e7d0270b00a2).html |
Abstract
Thermal-treatment controlled room temperature phosphorescence is realized by embedding either originally synthesized carbon dots (CDs) or 200 °C thermal-treated CDs into a polyvinylalcohol (PVA) matrix through post-synthetic thermal annealing at 200 or 150 °C. The thermal-treatment controlled phosphorescence is attributed to the transfer of photoexcitation from the excited singlet state to the triplet state through intersystem crossing, followed by radiative transition to the ground state, which is due to decrease of quenchers (oxygen) in the CDs and suppression of the vibrational dissipations through the chemical bonding of CDs in the PVA matrix. Multilevel fluorescence/phosphorescence data encryption is demonstrated based on the thermal-treatment controlled phosphorescence from CD@PVA composites.
Research Area(s)
- Anti-counterfeiting, Carbon dots, Data encryption, Polyvinylalcohol matrix, Room temperature phosphorescence
Citation Format(s)
Multilevel Data Encryption Using Thermal-Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites. / Tian, Zhen; Li, Di; Ushakova, Elena V. et al.
In: Advanced Science, Vol. 5, No. 9, 1800795, 09.2018.
In: Advanced Science, Vol. 5, No. 9, 1800795, 09.2018.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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