DYES AND PIGMENTS
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2024
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IF 4.1
Xiang Long,Hongxiang Liu,Jing Hu,Shaogui Wu
Herein, we report a facile one-step solvothermal synthesis of nitrogen and sulfur co-doped fluorescent carbon dots (N,S-CDs) using benzoic acid as the carbon source and sulfonamide as the doping agent. The synthesized N,S-CDs exhibit stable photoluminescence with an impressive fluorescence quantum yield of 16.8 %. These N,S-CDs maintain their luminescent properties under various challenging conditions, including high salt concentrations, elevated temperatures, UV radiation exposure, acidic or alkaline environments, long-term storage, and different solvents. Notably, the photoluminescence of N,S-CDs is excitation-wavelength dependent, with emission wavelengths tunable from 470 nm to 585 nm. Furthermore, the N,S-CDs display distinct fluorescent hues in aqueous and ethanolic media, presenting a novel dual-switch anti-counterfeiting ink system. Leveraging the sensitivity of N,S-CDs to gentamicin, we have developed a facile and rapid detection method for this antibiotic, which has been successfully applied to the analysis of authentic milk samples. This research contributes a novel and efficient protocol for the fabrication of high-performance carbon dots, thereby expanding their potential applications in food analysis and anti-counterfeiting technologies.
研究领域:
材料科学
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分析化学
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食品安全
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2025
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IF 4.2
Jing Yang,Ying Duan,Lixu Wang,Wangchuan Xiao,Qiao rong Ru,Peng Li,Shenjie Zhang,Zheng Sun
Host-guest systems of carbon dots (CDs) embedding in matrix with room-temperature afterglow (RTA) are of great importance for various applications, but so far rather limited due to relaying on high-energy ultraviolet (UV) excitation, monochromatic afterglow emission, or harsh synthesis. Herein, PTA materials (PASP@BA) with UV/visible light dual-mode excitation are prepared via one-step heat treatment of polyaspartic acid (PASP) and boric acid (BA). The RTA colors of PASP@BA display a significant bathochromic shift from blue to yellow as the excitation wavelength increases from 254 to 420 nm under ambient condition. Impressively, the visible-light-activated ultralong RTA can last for about 7 s by naked eye under ambient conditions. By correlating photophysical properties with structural characterization results, it is concluded that the polycrystalline boron oxide matrix and covalent B–C bonds can effectively suppress non-radiative transitions and stabilize the triplet excited state of CDs by restricting molecular motion and isolating environmental quenchers, thus facilitating the generation of long afterglow. More interestingly, the afterglow color can be also tuned by dynamic varying in B–C bond density and CDs dimensions. Finally, practical applications of such photo-responsive systems in multi-level information anti-counterfeiting and encryption are further demonstrated.
研究领域:
材料科学
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纳米光学
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光物理
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分析化学
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功能材料
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生物成像
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信息安全
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2025
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IF 7
Xiangyan Yun,Yujie Xie,Yukang Lu,Hanlin Hu,Yumeng Shi,Henan Li
The synergistic interaction between Mn2+ and Sb3+ ions in organic–inorganic hybrid single crystals has unlocked exciting optical applications for multiple band emission centers. Here, (TPMP)2MnBr4:Sb3+ single crystals were synthesized. They exhibited energy transfer from Mn2+ to Sb3+ ions, producing color-tunable luminescence and multiband emission. The dual emission leveraged d-d transitions in Mn2+ for green emission and self-trapped excitons in Sb3+ for broad red emission. Precise control of the excitation energy created broad color gamut modulation on the CIE chromaticity diagram, ranging across green, yellow, and red. Furthermore, there were distinct temperature sensitivities of the Mn2+ and Sb3+ emission centers, leading to robust fluorescence intensity ratios for temperature sensing with high relative sensitivity (3.92% K–1) and absolute sensitivity (5.42% K–1). These results indicated significant (TPMP)2MnBr4:Sb3+ potential for optical temperature sensing and dynamic information for anticounterfeiting encryption. This work provides a pathway for energy-transfer dynamics and luminescence applications of Mn2+-Sb3+ systems.
研究领域:
材料化学
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光物理学
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功能材料
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分析化学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
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2023
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IF 4.6
Xin Ding,Yu Min,Chang Wang,Qiang Zhang
A new near-infrared (NIR) emission material, BaSi1.5Ge2.5O9:Cr3+, with outstanding long afterglow properties is designed and synthesized successfully. Its structure, photoluminescence, and long afterglow emission features are studied in detail. Cr3+ occupies six-coordinated Ba2+ and Ge4+ sites in this system, which can emit characteristic broadband NIR light in the range of 700–1200 nm, and it has a long afterglow emission of more than 10 h. We calculated the band gap of the host at about 4.1 eV, the energy level distribution after Cr3+ doping, and the distribution of oxygen vacancies through density functional theory simulation, which theoretically proved the characteristic transition of Cr3+ and that the oxygen vacancies are crucial to form the defect energy levels. This is corroborated with the reflectance spectra, three-dimensional thermoluminescence spectra, and electron spin resonance (ESR) spectra. The oxygen-deficient environment favors the formation of oxygen vacancy defects and prevents the oxidation of Cr3+ to Cr6+, which are the key points for the luminescence and afterglow properties. A mechanistic model of defect formation and electron trapping and transport processes is successfully established. Finally, its multifunctional applications in information anticounterfeiting encryption, biological tissue penetration, and internal nondestructive testing and imaging are demonstrated.
研究领域:
材料科学
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光学
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物理学
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生物医学工程
✓ 已验证
DOI
高影响因子
Nano Energy
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2024
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IF 16.8
Hui Xiao,Jinyang Zhao,Xuefei Li,Hangchuan Zhang,Miao Zhou,Weiran Cao,Xiaolin Yan,Xin Zhang,Xiao Wei Sun,Lixuan Chen
Colloidal nanocrystals stand at the forefront of various applications given their unique optoelectronic properties and abundant active sites. However, the surface dynamics of nanocrystals make it difficult to avoid performance sacrifices that result from certain processing methods. Here we introduce a general nanoscale electric vehicle (NEV) platform for efficient and lossless manipulation and processing of functional nanomaterials by selective electrophoretic deposition . Dual-ligand modified system comprising charging ligands and anchoring ligands enables NEV to be universally compatible with fine patterning of various nanomaterials such as quantum dots, perovskites , rare-earth compositions or Janus materials. Without performance impairment from additional modifications, the luminescence performance of the nanocrystals improved significantly with the help of NEV to a level comparable to the commercial standard. Furthermore, we demonstrate the capabilities of our approach for display and anti-counterfeiting encryption applications. Our strategy offers a versatile way of creating high-performance nanomaterial devices in a cost-effective and non-destructive manner.
研究领域:
纳米技术
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材料科学
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电化学
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光电子学
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显示技术
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防伪技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）