Hot-Band-Absorption-Induced Anti-Stokes Fluorescence of Aggregation-Induced Emission Dots and the Influence on the Nonlinear Optical Effect

Zhang, Yuhuang; Zhou, Ji; Peng, Shiyi; Yu, Wei; Fan, Xiaohui; Wen, Liping; Ye, Zikang; Qi, Ji; Feng, Zhe; Qian, Jun

doi:10.3390/bios11110468

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…The Stokes shift is a quantized energy transition caused by the radiant electric field with electrons. This incident absorbs light energy from the laser at a certain wavelength and re-emits the light energy at a larger wavelength (Zhang et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

The Effect of Hydrothermal Temperature and Time of Urea-Doping on the Optical Properties of Lemongrass-Based Carbon Dots

Nalwi,

Maddu,

Kurniati

et al. 2023

Jambura Physics J.

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CDs sourced from spiced lemongrass have been produced by hydrothermal method at hydrothermal temperatures of 120 ℃, 140 ℃, 160 ℃ and 180 ℃. The addition of urea as a nitrogen source was carried out in the synthesis of carbon nanoparticles at a hydrothermal temperature of 180 ℃ for two hours and three hours to see the effect on the optical properties of the CDs. The addition of urea gave a different effect on the two CDs. But the energy band gap (Eg) of the two becomes narrower. For two hours of hydrothermal duration, the addition of urea showed a significant increase in absorbance, but a decrease in fluorescence intensity, whereas for three hours, it resulted in an increase in fluorescence intensity. The results of measuring the size distribution of carbon nanoparticles showed a peak value of 52.32 nm. Functional group analysis using the FTIR spectrometer showed that the carbon nanoparticles consisted of C=C, C-O, O-H, 𝐶-N-𝐶 bonds. Urbach energy (Eu) increases with increasing hydrothermal synthesis temperature at 2 hours and 3 hours. The decrease and increase in the Urbach energy (Eu) is caused by the increasing regularity of the hydrothermal temperature as a result of the synthesis time so that the structure of the CDs becomes more stable and homogeneous.

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Section: Methodsmentioning

confidence: 99%

The Effect of Hydrothermal Temperature and Time of Urea-Doping on the Optical Properties of Lemongrass-Based Carbon Dots

Nalwi,

Maddu,

Kurniati

et al. 2023

Jambura Physics J.

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“…However, most of them suffer from low sensitivity, and it is usually difficult to recognize tiny pathological changes when the lesion is small [ 7 , 8 ]. Optical imaging techniques such as fluorescence and photoacoustic imaging have significant advantages such as high sensitivity, real-time monitoring, noninvasive imaging, and portable instruments, which are very promising for disease diagnosis and therapy [ 9 , 10 , 11 , 12 , 13 , 14 ]. Fluorescence has been used for in vitro examination of diseased samples and in vivo image-guided tumor surgery clinically.…”

Section: Introductionmentioning

confidence: 99%

Reactive Species-Activatable AIEgens for Biomedical Applications

Kang

Yin

et al. 2022

Biosensors

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Precision medicine requires highly sensitive and specific diagnostic strategies with high spatiotemporal resolution. Accurate detection and monitoring of endogenously generated biomarkers at the very early disease stage is of extensive importance for precise diagnosis and treatment. Aggregation-induced emission luminogens (AIEgens) have emerged as a new type of excellent optical agents, which show great promise for numerous biomedical applications. In this review, we highlight the recent advances of AIE-based probes for detecting reactive species (including reactive oxygen species (ROS), reactive nitrogen species (RNS), reactive sulfur species (RSS), and reactive carbonyl species (RCS)) and related biomedical applications. The molecular design strategies for increasing the sensitivity, tuning the response wavelength, and realizing afterglow imaging are summarized, and theranostic applications in reactive species-related major diseases such as cancer, inflammation, and vascular diseases are reviewed. The challenges and outlooks for the reactive species-activatable AIE systems for disease diagnostics and therapeutics are also discussed. This review aims to offer guidance for designing AIE-based specifically activatable optical agents for biomedical applications, as well as providing a comprehensive understanding about the structure–property application relationships. We hope it will inspire more interesting researches about reactive species-activatable probes and advance clinical translations.

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“…NIR-II imaging and therapy have shown promising applications in many areas, such as vascular diseases, tumors, and brain diseases [ 65 , 66 , 67 , 68 , 69 ]. During the last several years, some NIR-II AIEgens have been developed, which opens up a new avenue for obtaining an ultrabright NIR-II nanoagent [ 70 , 71 , 72 , 73 , 74 , 75 ]. In addition to the excellent imaging of NIR-II AIEgens in the living body, it is highly desirable to endow them with a therapeutic property (e.g., PDT) to enable precision medicine.…”

Section: Introductionmentioning

confidence: 99%

NIR-II AIEgens with Photodynamic Effect for Advanced Theranostics

et al. 2022

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Phototheranostics that concurrently integrates accurate diagnosis (e.g., fluorescence and photoacoustic (PA) imaging) and in situ therapy (e.g., photodynamic therapy (PDT) and photothermal therapy (PTT)) into one platform represents an attractive approach for accelerating personalized and precision medicine. The second near-infrared window (NIR-II, 1000–1700 nm) has attracted considerable attention from both the scientific community and clinical doctors for improved penetration depth and excellent spatial resolution. NIR-II agents with a PDT property as well as other functions are recently emerging as a powerful tool for boosting the phototheranostic outcome. In this minireview, we summarize the recent advances of photodynamic NIR-II aggregation-induced emission luminogens (AIEgens) for biomedical applications. The molecular design strategies for tuning the electronic bandgaps and photophysical energy transformation processes are discussed. We also highlight the biomedical applications, such as image-guided therapy of both subcutaneous and orthotopic tumors, and multifunctional theranostics in combination with other treatment methods, including chemotherapy and immunotherapy; and the precise treatment of both tumor and bacterial infection. This review aims to provide guidance for PDT agents with long-wavelength emissions to improve the imaging precision and treatment efficacy. We hope it will provide a comprehensive understanding about the chemical structure–photophysical property–biomedical application relationship of NIR-II luminogens.

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Hot-Band-Absorption-Induced Anti-Stokes Fluorescence of Aggregation-Induced Emission Dots and the Influence on the Nonlinear Optical Effect

Cited by 9 publications

References 36 publications

The Effect of Hydrothermal Temperature and Time of Urea-Doping on the Optical Properties of Lemongrass-Based Carbon Dots

The Effect of Hydrothermal Temperature and Time of Urea-Doping on the Optical Properties of Lemongrass-Based Carbon Dots

Reactive Species-Activatable AIEgens for Biomedical Applications

NIR-II AIEgens with Photodynamic Effect for Advanced Theranostics

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