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ACS Applied Materials & Interfaces

ACS Applied Materials & Interfaces

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Promoting the Efficiency of Room-Temperature Phosphorescence by Forming the Composite and Employing It for Fingerprint Detection

Published:10 December 2024 DOI: 10.1021/acsami.4c18260
Xue Lv, Haoda Zhang, Chong Li, Xiaoming Yang

Abstract

Currently, carbon dots (CDs) with room-temperature phosphorescence (RTP) show bright prospects in multiple fields, owing to their tunable wavelengths and large Stokes shifts. Howbeit, obtaining the long-lived efficient RTP of CDs still encounters a different kind of challenge. Here, we originally prepared the carbon dots (CDs@β-GPA) with β-guanidinopropionic acid and diethylenetriamine pentamethylene phosphonic acid, and CDs@β-GPA exhibited the obvious green RTP when fixed on filter paper. Importantly, the introduction of boric acid (BA) into the carbon dots resulted in stabilized triplet excitons by forming the composite of CDs@β-GPA/BA through covalent coupling, and the optical band gap was effectively reduced and nonradiative transitions were inhibited, thus leading to a significantly prolonged phosphorescence lifetime of up to 1.35 s. Meanwhile, we also acquired the phosphorescent emission of CDs@β-GPA/BA excited by visible light. This strategy may broaden the approaches to produce a long-lifetime and high-efficiency RTP material. Moreover, CDs@β-GPA/BA was successfully employed in the fields of fingerprint detection and advanced information encryption.

Substances (9)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Dimethyl sulfoxide 67-68-5 C2H6OS 1924 suppliers $5.00-$120900.00
Isopropyl alcohol 67-63-0 C3H8O 1762 suppliers $18.00-$7870.00
Ethylene glycol 107-21-1 C2H6O2 1524 suppliers $7.62-$1800.00
Sodium hydroxide 1310-73-2 NaOH 1358 suppliers $14.00-$17490.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1313 suppliers $11.20-$12200.00
Tetrahydrofuran 109-99-9 C4H8O 1168 suppliers $9.00-$17160.00
Ethanol 64-17-5 C2H6O 955 suppliers $10.00-$28350.00
Methanol 67-56-1 CH4O 895 suppliers $9.00-$7620.00
Boric acid 11113-50-1 BH3O3 380 suppliers $198.00-$1090.00

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