ACS Applied Nano Materials
·
2023
·
IF 5.9
Zifan Li,Yueyue Wu,Xu Luo,Xuemei Dong,Keyuan Pan,Fei Xiu,Juqing Liu
Room-temperature phosphorescence (RTP) holds tremendous potential in various fields such as optoelectronic devices, bioimaging, and information security applications. However, achieving efficient RTP in aqueous environments has been a challenge due to nonradiative deactivation caused by dissolved oxygen and solvent-induced relaxation. In this study, we propose a design strategy to enhance the phosphorescence emission of carbon dots (CDs) in aqueous solutions by constructing hydrogen-bonded networks between CDs and ammeline (AM). The formation of robust hydrogen-bonded networks, combined with the synergistic effect of bound water, significantly enhances the phosphorescence emission by stabilizing the triplet excited states of CDs. Furthermore, the prepared AM-CD suspension exhibits an exceptionally long phosphorescence lifetime of up to 697.58 ms, showcasing its potential applications in two-photon information encryption and decryption.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
APPLIED OPTICS
·
2021
·Vol. 60
·期 12
·3540-3548
·
IF 1.98
Jianfeng Ye,Ziyang Tian,Yuxin Hu,Haoyun Wei,Yan Li,Yi Zhao,Yi Zhao,Mingqiang Zou,Mingqiang Zou,Mingqiang Zou
Remote Raman instruments have become powerful analytical tools in some special environments. However, ambient daylight is the main limitation in the data acquisition process. To suppress daylight background interference and obtain a high signal-to-background ratio (SBR), we develop a dual-wavelength wide area illumination Raman difference spectroscopy (WAIRDS) system for daytime remote detection. In the WAIRDS system, a wide area illumination scheme and shifted-excitation Raman difference spectroscopy method are used to improve the reliability of collected Raman spectra. Measurements of polystyrene indicate that the WAIRDS system can be operated to obtain background-free Raman spectra under different levels of daylight background interference. The remote results show that the improvement in SBR is about three- to fivefold, and the system can work at distances of up to 9.2 m on a sunny afternoon. Moreover, to be close to the actual detection, the system is used for mineral and explosive raw material detection during daytime measurement. Measurements show that the WAIRDS system will be a useful tool for many remote applications in the future.
研究领域:
光学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Ru-Kun Ding,Xiao-Song Zhang,Lan Li,Jian-Ping Xu,Li-Na Kong,Xiao-Kai Gong,Hao Yin,Zhao-Wei Zhang,Qian Li,Long Liu
Lead halide perovskites have received extensive attention due to their excellent photoelectric and photonic properties. However, low stability is an obstacle to material production and optoelectronic applications. In this research study, CsPbBr3/Cs2SiF6:Mn4+ rivet nanostructured perovskites coated with ZnS and self-passivation layers have been synthesized. The rivet nanostructured perovskites are applied in tunable white light-emitting diode (WLED) devices and tunable flexible white electroluminescent (EL) devices. The red and green dual-wavelength tunable luminescence in the rivet nanostructured perovskites has been obtained via Cs ion sharing. Upon the addition of ZnS and a self-passivation aluminum layer coating on the surface of the rivet perovskites, the photoluminescence (PL) intensity and the stability increased by 588.7 and 323.6%, respectively. In addition, a series of spectrally tunable WLED devices with an InGaN blue LED chip and flexible white EL devices is fabricated using the CsPbBr3/Cs2SiF6:Mn4+/2ZnS/Al rivet nanostructured perovskites. The tunable WLED devices can produce standard white light and cold and warm white light. The tunable EL devices produce luminescence even at 60° bending. By studying the temperature-dependent PL spectra of CsPbBr3/Cs2SiF6:Mn4+/nZnS/Al rivet nanostructured perovskites, the energy transfer mechanism at cryogenic and room temperatures is analyzed. At the same time, the protection principle of the self-passivation coating on the CsPbBr3/Cs2SiF6:Mn4+ rivet nanostructured perovskites is discussed.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2020
·Vol. 53
·期 28
·285103
·
IF 3.169
Jingheng Nie,Weitao Ying,Jianmin Gu,Fei Wang,Shiqing Xu,Shimin Liu
Complex logic systems using external excitation sources (1550 nm and 1064 nm lasers) as stimulus inputs and upconversion (UC) emission intensities as the optical outputs signals have been developed by taking advantage of the unique two-wavelength excitation effects. The Er3+ doped β-NaYF4 material that can achieve the emission enhancement via simultaneous dual-wavelength pumping at 1550 and 1064 nm due to the matching energy level. Elementary logic operations (OR, AND, and YES) and integrative logic operations are implemented by observing the change in two visible fluorescence emission bands (green and red) under the near-infrared excitation input conditions. The multiple outputs in our system can generate different logic operations under the same input conditions, which could increase the information content in the logic library and further improve the information processing capability. This logic system that takes infrared excitation as input and visible light as output has broad application prospects in the fields of anti-counterfeiting and information encryption. The results not only provide a deep understanding of the dual-wavelength excitation UC luminescence mechanism, but also offer a useful enlightenment for the development of novel micro/nanostructured materials for photonic devices.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 18
·11913-11924
·
IF 3.442
Li Zhiying,Li Peng,Guo Linna,Zhang Zongxue,Gao Minghuan,Zhang Yuansen,Li Tiesheng
A series of RE 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ (RE = Y, Pr, Nd, Sm, Eu, Gd, Dy, and Lu) nanoparticles were prepared by citric acid-assisted sol–gel method.
The upconversion luminescence (UCL) properties of block-shaped Gd 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ were the best among the materials obtained. In addition, the UCL properties of the investigated systems by two strategies could be further improved. Modulation of the crystal structure could be achieved by the substitution of rare earth ions in matrix lattice. The UC emission intensity of Gd 2 MoO 6 doped with Y 3+ (40%) was enhanced about 2.27 (2.52) more times than that of Y 3+ -absent samples excited at 980 nm (1550 nm). Secondly, dual wavelength was used as the excitation wavelength simultaneously: The green UCL intensity of RE 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ was almost not changed, while the red UCL intensity was enhanced compared to the sum of the red UCL intensities excited by 980 nm and 1550 nm, respectively. The UCL mechanism excited by dual wavelength was investigated in detail, in which the two co-operative excitation processes were presented.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Peng Li,Linna Guo,Zongxue Zhang,Tiesheng Li,Penglei Chen
A series of Bi 2 O 3 :Yb 3+ /Er 3+ phosphors with different phases and morphologies were obtained by tuning doping ions, which played a vital role in the upconversion luminescence (UCL). Both Er 3+ single doped and Yb 3+ /Er 3+ co-doped samples exhibit narrow, nearly pure red emission whether excited by 980 nm or 1550 nm. Compared to the sum of emission intensities excited by two single-wavelength (980 nm and 1550 nm) separately, the red emission from Bi 2 O 3 :Yb 3+ /Er 3+ with uneven distributed nanometer or micron blocky particles structure excited by two-wavelength simultaneously was enhanced by a factor of 2.41. To further improve the UCL intensity, optical-inert ions such as Na + , Ca 2+ and Gd 3+ were doped into this system. Compared to the optical-inert ions free sample (Bi 2 O 3 :15% Yb 3+ , 2% Er 3+ ), the pure red UCL in Bi 2 O 3 :15% Yb 3+ , 2% Er 3+ with 6% Na + , 2% Ca 2+ and 4% Gd 3+ doping is enhanced by 223.83 or 203.73 times under 980 or 1550 nm excitation, respectively. Meanwhile, the UCL mechanism under the multiwavelength was investigated in detail and its model of UC emission process was proposed.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Cheng Zhang,Xin Li,Meilin Liu,Taotao Li,Tianxiang Yu,Yu Li,Jian Zhang,Abdullah M. Asiri,Khalid A. Alamry,Kui Zhang
Lanthanide doped nanoparticles play an important role in the applications of anti-counterfeiting due to their outstanding optical properties, including large Stokes shift, high color purity, long lifetimes, and excellent photostability. However, the excitation wavelength of most luminescent lanthanide doped materials is strictly limited to a small range owing to the narrow absorption band of doped lanthanide ions. Herein, NaYbF 4 :Tb@NaGdF 4 :Ce core-shell nanoparticle was developed and synthesized by high temperature coprecipitation method. The core-shell nanoparticles exhibited green emission of doped Tb 3+ ions under the excitation of 980 nm in the near-infrared (NIR) region or 254 nm in the ultraviolet (UV) region, respectively. The NIR excitation was realized through cooperative sensitization upconversion process from Yb 3+ to Tb 3+ in the core, while the UV excitation was achieved by energy transfer from Ce 3+ to Gd 3+ and to Tb 3+ across the interfaces. The two-mode of excitation increased the security level of information coding and improved the reliability of anti-counterfeiting. Significantly, the interference of background fluorescence can be overcome by choosing the appropriate excitation wavelength. As a proof of concept, the core-shell nanoparticles for anti-counterfeiting applications were demonstrated.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Xiu-Fang Yan,Zeng-Ping Chen,Ying Huang,Chao Kang,Ru-Qin Yu
Probe encapsulated by biologically localized embedding (PEBBLE) has emerged as a new type of sensing technique for complex systems. Generalized ratiometric PEBBLE nanosensors prepared by encapsulating an intensity-based probe and an inert reference dye inside the pores of stable matrix possess advantages of easy synthesis, immunity to interference, lower toxicity, and robustness to variations in probe loading. However, the selection of appropriate reference dyes used in generalized ratiometric PEBBLE nanosensors is a rather difficult task since they should satisfy some stringent requirements. In this contribution, the feasibility of using carbon dots (C-dots) as generic inert references in synthesizing PEBBLE nanosensors was first investigated in detail. And a dual-wavelength monitoring strategy and the quantitative fluorescence model for generalized ratiometric probes (QFM GRP ) were adopted to solve the problems brought by the use of carbon dots as inert references. C-dots doped PEBBLE nanosensors (C-PEBBLE nanosensors) for the quantification of NO 2 − and free Ca 2+ were synthesized by encapsulating C-dots and intensity based fluorescence probes (i.e., acriflavine for NO 2 − , and Rhod-2 for Ca 2+ , respectively) inside the pores of stable matrix. Experimental results showed that the combination of C-PEBBLEs, the QFM GRP model and the dual-wavelength monitoring strategy achieved accurate quantification of NO 2 − and the free Ca 2+ in real-world samples. Their quantitative results were in good consistence with those determined by HPLC and atomic absorption spectrophotometer, respectively. The strategies proposed in this contribution have generic applicability in the synthesis of PEBBLE nanosensors and their quantitative applications.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 13
·4860-4866
·
IF 1.938
Xuanping Tan,Shaopu Liu,Yizhong Shen,Youqiu He,Yusha Liu,Jidong Yang
A sensitive and simple method for the determination of fleroxacin (FLO) was developed based on the changes of dual-wavelength fluorescence signals of glutathione (GSH)-capped CdTe quantum dots (QDs). Under optimum conditions, a linear calibration plot of the quenched fluorescence intensity at 555 nm against the concentration of FLO was observed in the range of 0.0262–35.0 μg mL−1 with a correlation coefficient (R) of 0.9992. Meanwhile, a linear calibration plot of the enhanced fluorescence intensity at 429 nm against the concentration of FLO was observed in the range of 0.1966–35.0 μg mL−1 with a correlation coefficient (R) of 0.9986. The corresponding detection limits (3σ/K) are 17.93 ng mL−1 at 555 nm and 59.58 ng mL−1 at 429 nm. In addition, a detailed reaction mechanism has also been proposed on the basis of electron transfer supported by ultraviolet-visible (UV-vis) absorption, fluorescence (FL) spectroscopy and the measurement of fluorescence lifetime. The method has been applied for the determination of FLO in pharmaceutical preparations with satisfactory results. The proposed method manifested several advantages such as high sensitivity, short analysis time, low cost and ease of operation.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 34
·11697-11704
·
IF 6.4
Yun-Peng Zhao,Zhi-Hong Zhang,Shan-Shan Yan,Bao-Shi Qiao,Zhen-Dong Lian,Zhi-Peng Wei,Francis Chi-Chung Ling,Hong-Yu Chen,Shi-Chen Su,Kar Wei Ng,Shuang-Peng Wang
Recently, halide perovskite materials have shown great potential in photodetection due to their large light absorption coefficient and long carrier diffusion length. In contrast to the reported sandwich-structured devices and single-junction perovskite photodetectors, we demonstrate here a MAPbBr3/MAPbCl3 bulk heterostructure by splicing a MAPbBr3 single crystal and a MAPbCl3 single crystal. Interestingly, the photo-carriers generated from MAPbBr3 and MAPbCl3 can only be extracted when the device is forward and reverse biased, respectively. The capability to read out the photocurrents from the single crystals with different band gaps separately enables dual-band optical detection. In particular, the heterostructure photodetector exhibits a fast on–off switching time on the order of microseconds and peak responsivities of 17 mA W−1 at 450 nm and 7 mA W−1 at 355 nm, respectively. Dual-band photodetection is proved to be useful for dual-wavelength light communications. Our work provides a facile route to construct bulk heterostructures and the wavelength/bias-sensitive rectifier could provide guidance for optical communication modules in the future.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Ru-Kun Ding,Xiao-Song Zhang,Long Liu,Xiao-Kai Gong,Zhao-Wei Zhang,Qian Li,Liu Pei,Lan Li,Jian-Ping Xu
Lead halide perovskites have garnered widespread attention because of their excellent photoelectric and photonic properties. However, their material fabrications and optoelectronic applications are hindered by low stability. Nanoriveted structure perovskites with high stability and long afterglow dual-wavelength emission are synthesized using a shared ion strategy of perovskites and phosphors. The CsPbBr3/CsCaAl2O4:Nd,Er nanoriveted structure perovskites exhibit dual-wavelength emission of blue and green during photoexcitation, as well as a prolonged afterglow. The fabricated flexible electroluminescent devices have spectrally tunable and dual-wavelength emissions even at 60° bending. Because the CsPbBr3 quantum dots (QDs) capture the photon emitted from Er element, the electroluminescent devices retain observable dual-wavelength emissions and high synchronization in their afterglow, which decays after the removal of power. The CsPbBr3/CsCaAl2O4:Nd,Er nanoriveted structure perovskites can also be used as the light-emitting downshift layers to improve the performance of photovoltaic modules in photovoltaic devices. At cryogenic temperatures, the temperature-dependent photoluminescence spectra test reveals the energy transfer between CsPbBr3 QDs and CsCaAl2O4:Nd,Er (contradicts the energy transfer in the afterglow state). These discoveries overcome the limitations of conventional afterglow phosphors, provide new applications for long afterglow materials, and introduce an innovative approach to energy conservation.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Ziwei Liu,Lanxiu Ni,Zuojun Hou,Yu Wang,Zhenjia Shi,Huangzhao Wei,Liang Feng,Chenglin Sun
Herein, we proposed a method which integrated solid-phase extraction (SPE) and ultraviolet dual wavelength absorption (UV-DWA) for quantitatively detecting levofloxacin (LEV) in treated medical wastewater. And electrocatalytic technology was utilized to simulate wastewater treatment systems. Tetracycline (TC) and LEV could be preferentially eluted and separated from other antibiotics, given their weaker retention behavior on SPE columns. The optimization of the SPE process was confirmed by high-performance liquid chromatography (HPLC). Based on the principle of wavelength superposition, we developed the DWA equation for wavelengths of 295 nm and 379 nm. TC has the same absorbance at the selected wavelength, so its interference can be eliminated through DWA. And the concentration of LEV was selectively determined. Conclusively, the linear range of SPE-DWA was 10–1000 ng‧mL −1 , with the correlation coefficient R 2 being 0.9984. Validation studies revealed that the limit of detection (LOD) was 2.95 ng‧mL −1 . The precision of this method, expressed as relative standard deviation (RSD), 2.49 % and 0.31 % for intra-day and inter-day analyses, respectively. Additionally, the method was successfully applied to the determination of trace levels of LEV in processed medical wastewater, and the recovery of the spiked samples ranged from 76.8 % to 87.8 %. Our findings indicated that the SPE-DWA had the potential for the on-site quantification of LEV residues in discharged medical wastewater, offering the advantages of low instrument, maintenance, and solvent costs. Furthermore, this method provides a technical pathway for the rapid and straightforward evaluation of antibiotic degradation systems in the future.
研究领域:
环境科学
·
分析化学
✓ 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）