Photoactivated Fluorescence Enhancement in F,N‐Doped Carbon Dots with Piezochromic Behavior

Abstract

Photoactivation in CdSe/ZnS quantum dots (QDs) on UV/Vis light exposure improves photoluminescence (PL) and photostability. However, it was not observed in fluorescent carbon quantum dots (CDs). Now, photoactivated fluorescence enhancement in fluorine and nitrogen co‐doped carbon dots (F,N‐doped CDs) is presented. At 1.0 atm, the fluorescence intensity of F,N‐doped CDs increases with UV light irradiation (5 s–30 min), accompanied with a blue‐shift of the fluorescence emission from 586 nm to 550 nm. F,N‐doped CDs exhibit photoactivated fluorescence enhancement when exposed to UV under high pressure (0.1 GPa). F,N‐doped CDs show reversible piezochromic behavior while applying increasing pressure (1.0 atm to 9.98 GPa), showing a pressure‐triggered aggregation‐induced emission in the range 1.0 atm–0.65 GPa. The photoactivated CDs with piezochromic fluorescence enhancement broadens the versatility of CDs from ambient to high‐pressure conditions and enhances their anti‐photobleaching.

On-off Fluorescent Switching of Excitation-independent Near-ultraviolet Emission Carbon Nanobelts for Ultrasensitive Detection Nimesulide in Pharmaceutical Tablet

“…In Fig. 2A, the full XPS spectrum displays three typical peaks at 284.9, 400.1, and 532.1 eV for C1s, N1s, and O1s, 15,16 respectively, which was consistent with the EDS result. The XPS spectrum of the C1s (Fig.…”

Glycothermally Synthesized Carbon Dots with Narrow-Bandwidth and Color-Tunable Solvatochromic Fluorescence for Wide-Color-Gamut Displays

“… 41 The ordered structure of the Ph-CDs can be determined by the intensity ratio of these D and G bands ( I G / I D ). 42 I G / I D of Ph-CDs was 1.5 ( Table S2 ), which was higher than I G / I D of the previously reported CDs, 1.0, 43 indicating the high crystallinity of the graphite structure of Ph-CDs.…”

Carbon‐Based Quantum Dots with Solid‐State Photoluminescent: Mechanism, Implementation, and Application

“…The controllable modification of the structure of a CQD is one of the most basic ways of achieving improved performance. [9,14] Thus, a great deal of effort has been made in the past few years concerning edge modification, lattice doping, and modifying the functional Carbon-based quantum dots (CQDs), including spherical carbon dots and graphene quantum dots, are an emerging class of photoluminescent (PL) materials with unique properties. Great progress has been made in the design and fabrication of high-performance CQDs, however, the challenge of developing solid-state PL CQDs have aroused great interest among researchers.…”