ADVANCED MATERIALS
·
2025
·Vol. 37
·期 41
·e09758
·
IF 26.8
Yupeng Huang,Shichao Lv,Xueliang Li,Jianrong Qiu,Shifeng Zhou
Near-infrared second window (NIR-II, 1000–1700 nm) light sources present remarkable scientific and technological promise, with wide-ranging applications spanning biomedical imaging, biosensing, and related fields. However, most of the available candidates are in bulk form and it is urgently required to develop mini light sources. Herein, a broadband NIR-II mini fiber-type light source equipped by Ni 2+ activated glass composite fibers is proposed and investigated. It is shown that the transparent glass composite exhibits broadband NIR-II emission with a full width half-maximum approaching 240 nm and an internal quantum efficiency (IQE) larger than 50% by rational control of nanocrystallization. Additionally, the corresponding glass composite fibers are prepared, demonstrating efficient broadband response and distinct on-off gain in NIR-II region. Benefited from above features, an all-fiber mini light source by fusing glass composite fibers with commercial passive fibers is successfully constructed and demonstrates its promising applications for NIR-II imaging. These findings demonstrate significant progress in the development of NIR-responsive photonic materials, enabling advanced applications in photonic technology.
研究领域:
光子学
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材料科学
·
生物医学成像
·
光学传感
·
光纤技术
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Huihui Kang,Xiaona Shang,Munira Abdumutallip,Yunqian Chen,Ling Li,Xiaofei Wang,Chunlin Li,Huiling Ouyang,Xu Tang,Lin Wang,Yinon Rudich,Jianmin Chen
Carbonaceous aerosols (CAs) are major components of fine particulate matter (PM 2.5 ) that dramatically influence the energy budget of Earth. However, accurate assessment of the climatic impacts of CAs is still challenging due to the large uncertainties remaining in the measurement of their optical properties . In this respect, a modified versatile aerosol concentration enrichment system integrated into optical instruments (VACES-OPTS) was set up to increase particle concentration and amplify signal-noise ratio during optical measurement . Based on the novel technique, this study was able to lower the detection limit of CAs by an order of magnitude under high temporal resolution (2 h) and small sampling flow (6 L min −1 ). Besides, stable and reliable optical data were obtained for absorption apportionment and source identification of black carbon (BC) and brown carbon (BrC). In the field application of the new system, high absorption coefficient of CAs in Shanghai, China was witnessed. Further analysis of the contribution of black carbon BC and BrC to light absorption revealed that BrC could account for over 15% of the total absorption at 370 nm. According to the potential source contribution function model (PSCF) classification, CAs with strong light absorption in urban Shanghai originated not only from highly polluted inland China but also from active marine ship emissions.
研究领域:
环境科学
·
大气科学
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DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2020
·Vol. 298
·期 10
·1285-1291
·
IF 1.536
Xie Chuanbao,Leng Kangwei,Sheng Jie,Wang Xuemei,Li Qianmin,Song Liang,Liu Lei,Sun Hejing,Huang Xiaowen,Wang Zhongwei,Yu Qing
Poly(methyl methacrylate) (PMMA) microspheres were synthesized through visible light–induced photopolymerization of methyl methacrylate (MMA). 2,4,6-Trimethylbenzoyldipenylphosphine oxide (TPO), polyvinylpyrrolidone (PVP), and light-emitting diodes (LEDs) were used as the photoinitiator, stabilizer, and light source, respectively. No other additive was involved. The effect of LEDs, TPO, and PVP was discussed. Results showed that PMMA microspheres with the size of 0.5–0.8 μm could be obtained when LED@385 nm was the light source, and the content of TPO and PVP was 2 wt% and 30 wt% of MMA. Moreover, the possible formation pathway of PMMA microspheres was proposed based on the investigation of reaction time and addition method of PVP.
Graphical abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 37
·46686
·
IF 1.901
Safdar Ali,Farooq Khurum Shehzad,Inamullah Maitlo,Sultan Valiev,Ghulam Muhyodin,Jun Nie
Two types of cryogels were obtained using 2-hydroxyethyl acrylate (HEA) and 2-hydroxyethyl methacrylate (HEMA) by homogeneous mixing with poly(ethylene glycol) diacrylate (PEGDA) as crosslinker at subzero temperature followed by photopolymerization with two different light initiation sources (high-pressure Hg arc lamp and UV-LED).The solution was frozen unidirectionally at −60 °C before polymerization and finally photopolymerized at the same temperature. The cryogels were characterized using photo-DSC, UV–vis and Fourier transform infrared spectroscopy, and scanning electron microscopy techniques. The cryogels cured with an LED light showed a higher polymerization rate and better morphological characteristics than ones cured with a high-pressure Hg arc. The water intake ratio of HEA/PEGDA was higher than HEMA/PEGDA for both curing sources. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46686.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Ling Liang,Kai-Yue Liu,Guang Yang,Zeng-Min Xue,Wen-Xuan Zhao,Hong-Tao Lin,Shu-Hai Chen,Chuan-Zeng Wang,Mark R.J. Elsegood,Simon J. Teat,Ming Wang,Takehiko Yamato
The application of organic luminescent materials is becoming diversified in the fields of display technology, imaging, chemosensors and information encryption, but improving luminescent efficiency and color purity remains a challenge. Herein, new insight for fine tuning asymmetrical pyrene-based luminogens is discussed by constructing Donor-π-Acceptor (D-π-A) type molecules along the short axis at the pyrene core. Further experiments and calculations demonstrate the possibility of dual emission with near-white color emitting and narrow full-width half maximum (FWHM) materials (∼12 nm for 7- tert -butyl-1-phenyl-3-carbazolylpyrene ( CzPy) in film) by regulating electron-donating/withdrawing groups. Experimental results prove that the luminescent efficiency shows strong competitiveness in the solid state (14.3% for CzPy ) and in the pyrene luminogen-doped amorphous polymer (29.5% for 7- tert -butyl-1-phenyl-3- N,N -diphenylaminopyrene ( DPaPy )). The narrow FWHM dedicated to improving color purity and reasonable luminescent efficiency were achieved. Furthermore, these findings not only enabled development of a new application of latent fingerprint extraction with high resolution but also provided an innovative strategy for the fabrication of flexible light source displays.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2021
·
IF 6.158
Lizhe Ma,Zhou Yang,Bang Ji,Yunfeng Liu,Yinlong Jiang,Jieli Duan,Wenfeng Zhao
In this study, the LED array system (UV and visible light) was established, and the theoretical light distribution of the reactor was simulated in MATLAB. The light field of the conventional light source is more uniform than that of the LED array, and the light field uniformity of the LED array can optimize by increasing the number of LED. Various combinations of light sources and catalysts were subjected to batch experiments in laboratory-scale reactors. All experiments are consistent with the Langmuir-Hinshelwood model, where k UV-LEDs array [P25-Sulfamethazine] =0.0018 min −1 and k Blue-LEDs array [Ag3PO4-Tetracycline] =0.0077 min −1 . In comparison experiments, conventional light sources exhibited faster dynamics compared to LED array light sources, where k Mercury lamp [P25- Sulfamethazine] =0.0209 min −1 and k Xenon lamp [Ag3PO4- Tetracycline] =0.0221 min −1 . Besides, all experiments are analyzed for electric energy per order ( E EO ). Specifically, the E EO value of the xenon lamp is 121 times that of the blue- LEDs array when the tetracycline concentration is 50 mg/L. The UV–vis of the catalyst is also coupled with the emission spectrum of the light source to evaluate the figures-of-merit of the system. The figures-of-merit ratio of the mercury lamp to the UV-LEDs array is 58.4, and the figures-of-merit ratio of the xenon lamp to the blue-LEDs array is 69.8. The obtained model can be applied to different reactors. This work demonstrates that the photocatalytic system driven by the LED array is superior to the conventional light source system regarding photon utilization rate and sustainability.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 11
·5330-5337
·
IF 3.3
Yu Wang,Rao Chen,Dongmei Liu,Chaofei Peng,Junwei Wang,Xiaoqing Dong
The development of effective Vis-sensitive photoinitiators for light-emitting diode (LED) polymerization is still an emerging challenge as LEDs are being developed into the predominant light sources. In this work, a series of new functionalized photoinitiators, containing thioxanthones and oxime-esters as functional groups, was designed and straightforwardly synthesized in two steps. The structures of the photoinitiators were studied using 1H NMR, 13C NMR, and high-resolution mass spectrometry. The conclusion of the photophysical properties indicated that the long wavelength absorptions from 360 nm to 405 nm made the investigated thioxanthone derivatives quite appealing as a valuable photoinitiator under UV-Vis LEDs. The structure–reactivity relationship was also studied in detail through real-time FTIR spectroscopy. A possible photolysis mechanism was expected based on further photolysis and online 1H NMR activities. With a proper molecular design, the new functionalized photoinitiators were synthesised straightforwardly and they displayed more advanced initiation abilities than their parent thioxanthone.
研究领域:
材料化学
·
光化学
·
有机合成
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200836
·
IF 10.05
Hexin Chen,Tuan Lin,Fan Huang,Shuxing Li,Xueyuan Tang,Rong-Jun Xie
Green light is generally used as the transmitter of underwater wireless optical communication (UWOC) system, but the currently available light-emitting diode (LED)-based green light has a poor luminous flux density (i.e., low brightness) and a low wall-plug efficiency (WPE), known as the “green gap”. In this work, it is proposed to produce the laser-driven green light by using blue laser diodes to pump the narrow-band green-emitting β-Sialon phosphor-in-glass (PiG) film. The dominant wavelength of the laser-driven green light can be tuned in the range of ≈520–540 nm, required for UWOC, by controlling the phosphor content at ≈60–80% and the film thickness at ≈150–185 µm. By introducing highly reflective TiO 2 into the PiG film, the laser-driven green light exhibits a maximum luminous flux density of 1260 lm mm −2 under blue laser excitation with a power density of 15.49 W mm −2 . For UWOC application, the green light is demonstrated to have a modulation bandwidth of 1.76 MHz, a high WPE of 8.7%, and a long transmission distance of ≈61.6 m. This work suggests that the laser-driven high-brightness green light will be a promising light source for UWOC.
研究领域:
光学
·
通信工程
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 8
·2102201
·
IF 10.05
Jiexin Li,Zongtao Li,Jiayong Qiu,Jiasheng Li
Quantum dots (QDs) exhibit remarkable photoelectric performance. However, the conversion efficiency and thermal performance of QD converters so far is not satisfactory for high-power solid-state light (SSL) applications owing to the serious reabsorption loss of QDs and the poor thermal diffusion of polymer materials. Here, an efficient QD converter based on an anodic aluminum membrane (AAM), with high light enhancement and thermal diffusion, is introduced for high-power SSL applications. Nanoporous AAMs are utilized as templates for confining the QD deposition into the nanowire (NW) shape by incorporating inkjet printing and vacuum-deposition methods, forming vertical QD NW arrays. Compared with conventional converters, QD-AAM yields nearly twofold photoluminescence intensity. Three-dimensional finite-difference (FDTD) simulations attribute the fluorescence-enhancement mechanism to the enhancement of QD conversions and boosting of the waveguide effect in QD-AAM. Furthermore, QD-AAM exhibits excellent thermal diffusion performance under high-power excitation, owing to the inner heat conduction path in the AAM framework. This study provides a practical and efficient strategy to comprehensively enhance the optical and thermal performance of QD converters for high-power SSL applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 26
·9014-9022
·
IF 6.4
Simin Gu,Bomei Liu,Shuaichen Si,Jing Wang
Laser-driven lighting technology is a remarkable innovation in the field of solid-state lighting. High-efficiency white light sources have been commercially produced, but laser-driven near-infrared (NIR) light source has not yet been captured, which hindered the numerous optoelectronic applications such as NIR spectroscopy and imaging techniques. Inspired by the observation that laser-driven lighting could break the limited power density and achieve effective output optical power density under higher incident optical power density, here, a novel NIR MgO:Cr3+,Ni2+ phosphor-in-glass film was prepared and combined on the sapphire substrate to fabricate laser-driven NIR light source. The results show that laser-driven NIR light source based on blue laser and MgO:Cr3+,Ni2+ phosphor-in-glass film combination could achieve a NIR output optical power density of 5.3 mW mm−2, which is 5 times higher than LED-driven NIR light source based on the same MgO:Cr3+,Ni2+ phosphor-in-glass film. Finally, we successfully demonstrated the potential applications of the as-fabricated laser-driven NIR light source in the field of night vision and high-penetration imaging. This finding provides an approach to achieving high-performance NIR light sources thereby opening up a new avenue for the exploration of NIR spectroscopy technology.
研究领域:
光学
·
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Xu Li,Chunfeng Wang,Yuantian Zheng,Zefeng Huang,Jiangcheng Luo,Mingju Zhu,Tianlong Liang,Biyun Ren,Xianhui Zhang,Dong Wang,Zhanbing Ren,Sicen Qu,Wei Zheng,Xiaoyan Wei,Dengfeng Peng
Mechanoluminescence (ML) materials, which directly convert mechanical energy into light emission, have emerged as an emerging class of light-emitting materials with various applications. Although significant progress has been made in the development of new ML materials and devices, their practical application is limited by their low intensity and homogenously structured host structures. Thus, multiple-structured host ML materials with high ML intensity and reproducibility are needed, particularly for wearable and printable ML light sources with high brightness. In this study, various Mn-doped ternary heterojunction ML materials, CaZnOS-ZnS-SrZnOS, are synthesised by high-temperature solid-phase reactions, and their luminescence properties are systematically tested. The result indicates that the ternary heterojunction materials have a higher ML intensity over 60 times stronger than the state-of-art SrZnOS: Mn 2+ , which is currently the brightest sample we have obtained. ML linearly depends on the magnitude of the applied force. Based on the synthesised ternary ML heterojunctions, repetitive self-driving luminescence of the zipper is achieved for the first time through powder modification and inlay; the clothes composed of our prepared zippers are pulled and bent when worn on the body to emit bright visible light. Additionally, a Velcro that can achieve light emission is developed; it provides a new idea for the development of wearable flexible self-luminous devices in the future. Simultaneously, movement-driven stress luminous printable objects that can be printed on the surface of various commodities or their packaging are demonstrated. The preparation of self-driven, battery-free, and electrode-free stress luminescence wearable low light sources has an important application trend, which can avoid the interference of the circuit and improve the stability of the devices, thus promising a wide range of applications in smart wear, energy-saving displays, safety and rescue, robotic skin, and information security.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Yonghang Li,Yang Lu,Haonan Ju,Wei Wang,Dong Tu,Hongyu Lu,Jiayu Wang,Hua Zou
Near-infared phosphor-converted light-emitting diodes (NIR pc-LEDs) are next-generation NIR light sources due to their long life, low cost, and compactness. Unfortunately, there is a lack of efficient NIR-II phosphors with high efficiency and large full width at half-maximum (fwhm) that can be excited by violet LED. Here, a series of Cr3+/Ni2+-codoped LiAlSiO4 with unprecedented emission peaking at 1150 nm (∼1000–1400 nm, fwmh ∼191 nm) were synthesized via a solid-state reaction. More importantly, the phosphors exhibit high efficiency and excellent thermal stability under violet emission excitation. Moreover, the NIR pc-LED devices as a NIR-II light source have been fabricated through a combination violet LED and optimized LiAlSiO4:Cr3+/Ni2+ phosphors, which are well applied to high-penetration imaging and nondestructive fruit damage inspection. These results indicate that the LiAlSiO4:Cr3+/Ni2+ phosphors have great potential applications as NIR light sources.
研究领域:
材料科学
·
光学工程
·
电子器件
✓ 已验证
DOI
危险品化学品经营许可证（带存储）