RSC Advances
·
2020
·Vol. 10
·期 14
·8233-8243
·
IF 3.119
Jun'an Lai,Zhangwen Long,Jianbei Qiu,Dacheng Zhou,Qi Wang,Yong Yang,Songhan Hu,Zhe Wang,Ke Zhang
Latent fingerprints (LFPs) are important evidence in crime scenes and forensic investigations, but they are invisible to the naked eye. In this work, a novel fluorescent probe was developed by integrating a narrow-band-emitting green afterglow phosphor, SrGa12O19:Mn2+ (SGO:Mn), and ethyl cellulose (EC) for the efficient visualization of LFPs. The hydrophobic interactions between the powder and lipid-rich LFPs made the ridge structures more defined and easily identifiable. The background fluorescence of the substrates was completely avoided because of the time-gated fluorescence of the afterglow phosphor. All the three levels of LFP degrees were clearly imaged due to the high sensitivity. Moreover, the SGO:Mn–EC powder was highly stable in neutral, acidic, and alkaline environments. In addition, 60 day-aged LFPs were successfully visualized by the powder. All performances showed that this strategy for LFP recognition has merits such as low cost, non-destructive nature, reliability, superior universality, and legible details. Together, these results show the great application prospects of this powder in forensic identification and criminal investigation.
研究领域:
材料科学
·
法医学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiyun Wang,Zhichao Liu,Bowen Zhang,Yongfeng Liu,Linglu Kuang,Qian Guo,Man Wang,Wei Tian,Jahangeer Ahmed,Min Zhou
Mechano-luminescence (ML) materials exhibit significant potential in anti-counterfeit coding, structural detection, and mechanical sensing due to their unique force-light conversion properties. However, current research predominantly focuses on recoverable ultraviolet irradiation and triboelectric effects within non-centrosymmetric crystal structures. In this study, we have successfully synthesized a doped centrosymmetric crystal structure, SrGa 12 O 19 (SGO): Tb 3+ , which displays green ML property and is capable of recovery under daylight irradiation. Furthermore, co-doping with Sb 3+ ions allowed a 13-fold increase in the trap concentration that significantly enhanced its long persistent luminescence (LPL) performance. Temperature-dependent ML properties, along with density functional theory calculations, provide additional confirmation of the crucial role played by trap structure in the conversion process of force into light. Additionally, a dual-function film with ML and LPL effects has been developed through coupling the polydimethylsiloxane and SGO: Tb 3+ , Sb 3+ phosphors, which has been effectively applied to warning speed measurement on hazardous roads at night. This work thus extended the design strategies and innovative applications of emergent ML materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yaowu Wang,Nan Lin,Yiheng Yue,Jianfeng Wang,Yinyan Li,Zhenping Wu,Shiqing Xu,Gongxun Bai
Near-infrared (NIR) phosphors have emerged as novel luminescent materials across various fields due to their unique advantages of high penetration and invisibility. However, there is currently a lack of intelligent NIR phosphors that can achieve multimode stimuli responsive for sensing applications. In this study, we employed a high-temperature solid-phase reaction to incorporate Pr3+ into Cr3+-doped gallate magnetite SrGa12O19 phosphor, yielding a multimode luminescent intelligent NIR phosphor. Also, due to the inherent cation vacancies and defects in the matrix, the material not only exhibits brighter photoluminescence but also exhibits distinct NIR mechanoluminescence at a lower load. Notably, Pr3+-doped SrGa12O19:Cr3+ also demonstrates extended persistent luminescence and thermoluminescence effects. Finally, we combined the phosphor with the blue LED chip to develop a new multifunctional NIR pc-LED. Leveraging NIR’s unique penetrating ability, it can persist in biological tissues for prolonged periods, enabling optical inspection and offering a novel approach to password protection for anticounterfeiting measures. This intelligent NIR phosphor solution significantly expands the application potential of NIR light in food quality assessment and analysis.
研究领域:
材料科学
·
光学工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 37
·15070-15081
·
IF 5.7
He Lin,Shuangqiang Fang,Tianchun Lang,Jiali Yu,Haoliang Cheng,Jiaqi Ou,Zhijie Ye,Renjie Xu,Xiulan Shui,Haolin Qu,Le Wang
Near-infrared (NIR) luminescent materials exhibit unique photophysical properties that make them crucial components in photobiological, photonic and optoelectronic applications. Nonetheless, almost all rare earth ions are difficult to be efficiently excited by blue light for NIR emission, mainly due to the inherent electron shielding effect of 5s25p6 orbitals. Here, an amazing enhancement of the Tm3+ 3H4 → 3H6 transition (800 nm) was achieved in the SrGa12O19 host upon 450 nm excitation. Compared with the Tm3+ single-doped sample, the internal quantum efficiency (IQE) in the 700–900 nm range was significantly improved from less than 1% to 74%, and the external quantum efficiency (EQE) was enhanced from nearly 0 to 33%, benefitting from the synergistic effect of Cr3+ contribution and electron shielding effect breaker of In3+. XRD structure refinement, time-resolved fluorescence spectroscopy and electron paramagnetic resonance were used to determine the effect of Cr3+ and In3+ doping. Furthermore, the universality of this strategy has also been verified with other rare earth ions (Ho3+, Nd3+, and Yb3+). Finally, a NIR phosphor-converted LED (pc-LED) is fabricated, exhibiting a satisfactory output power of 141 mW@500 mA and demonstrating the potential for photosynthetic bacteria culture, venous imaging and non-destructive testing. This work opens a window for blue light-pumped NIR emission of rare earth ions.
研究领域:
材料科学
·
光学
·
生物光子学
·
光生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）