MATERIALS RESEARCH BULLETIN
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2018
·
IF 2.873
Ming Gu,Yue Tian,Cai’e Cui,Ping Huang,Lei Wang,Qiufeng Shi
A novel red-emitting Ba 2 ZrF 8 : Mn 4+ phosphor was prepared by two-step method at low temperature, where critical precursor K 2 MnF 6 was prepared first by the reduction of KMnO 4 using H 2 O2 as reducer. The crystal structure and morphology of the phosphor was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS), showing single phase product. Luminescent properties of the phosphor were investigated by photoluminescence spectroscopy (PL) and decay curves. The molar ratio of KMnO 4 : KHF 2 was confirmed to play the key role in improving the luminous efficiency. More importantly, the phosphor exhibits a broadband excitation from 300 to 520 nm due to 4 A 2g → 4 T 1g and 4 A 2g → 4 T 2g transition of Mn 4+ , matching well with blue LED chips. Under 465 nm excitation, intense red emission at around 630 nm with high color purity is achieved, suggesting the red-emitting phosphor has great potential for white light-emitting diodes (wLEDs).
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ya-Meng Chen,Yang Zhou,Qing Zhao,Jun-Ying Zhang,Ju-Ping Ma,Tong-Tong Xuan,Shao-Qiang Guo,Zi-Jun Yong,Jing Wang,Yoshihiro Kuroiwa,Chikako Moriyoshi,Hong-Tao Sun
All-inorganic perovskites have emerged as a new class of phosphor materials owing to their outstanding optical properties. Zero-dimensional inorganic perovskites, in particular the Cs4PbBr6-related systems, are inspiring intensive research owing to the high photoluminescence quantum yield (PLQY) and good stability. However, synthesizing such perovskites with high PLQYs through an environment-friendly, cost-effective, scalable, and high-yield approach remains challenging, and their luminescence mechanisms has been elusive. Here, we report a simple, scalable, room-temperature self-assembly strategy for the synthesis of Cs4PbBr6/CsPbBr3 perovskite composites with near-unity PLQY (95%), high product yield (71%), and good stability using low-cost, low-toxicity chemicals as precursors. A broad range of experimental and theoretical characterizations suggest that the high-efficiency PL originates from CsPbBr3 nanocrystals well passivated by the zero-dimensional Cs4PbBr6 matrix that forms based on a dissolution–crystallization process. These findings underscore the importance in accurately identifying the phase purity of zero-dimensional perovskites by synchrotron X-ray technique to gain deep insights into the structure–property relationship. Additionally, we demonstrate that green-emitting Cs4PbBr6/CsPbBr3, combined with red-emitting K2SiF6:Mn4+, can be used for the construction of WLEDs. Our work may pave the way for the use of such composite perovskites as highly luminescent emitters in various applications such as lighting, displays, and other optoelectronic and photonic devices.
研究领域:
材料科学
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光学
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化学
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产品关联
DOI
PubMed
高影响因子
Nanoscale
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2018
·Vol. 10
·期 21
·10250-10255
·
IF 7.233
Jingchun Huang,Qi Li,Zhengzhong Shao
In this work, we report a simple but novel method to transfer highly luminescent silicon nanoparticles (Si NPs) from solutions to solids without sacrificing their excellent photoluminescence (PL) properties. Hybrid Si NP/clay phosphors that glowed ultrabright and had colorful PL properties were first obtained. More importantly, large-area and flexible films with superior PL properties can be easily obtained via combining the Si NP/clay hybrids with different kinds of polymer. The Si NP-based phosphors and films from our method show high stabilities with no significant loss of PL performance after long-term storage (several months). In addition, bright yellow-emitting Si NPs were prepared and used as down-converters for white-light-emitting diodes (W-LEDs). Overall, this work presents a simple, versatile and green method to fabricate Si NP-based solid hybrids with superior PL properties, which has promise to be applied in the future in solid-state lighting fields.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 27
·9291-9299
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IF 6.4
Yining Wang,Mengmeng Shang,Yixin Sun,Minliang Deng,Xiaole Xing,Peipei Dang,Jun Lin
With the increasing demand for the application of near-infrared (NIR) spectroscopy in security, agriculture, medical and other fields, people have been seeking efficient and intelligent NIR light sources. Herein, Cr3+ doped Ca3Sc2Ge3O12 (CSGG) broadband NIR phosphors are successfully synthesized. Under excitation of 480 nm, the emission peak of CSGG:Cr3+ is located at 785 nm, and the full width at half maximum (FWHM) is 106 nm. Low photoluminescence spectra (7 K and 77 K) support the broadband NIR emission coming from two Cr3+ luminescence centers occupying ScO6 and CaO8 sites, respectively. CSGG:Cr3+ exhibits excellent thermal stability (97% at 100 °C) and low internal quantum efficiency (IQE = 22%). The introduction of Ce3+ leads to the enhancement of IQE from 22% to 61% due to the following two reasons: the energy transfer from Ce3+ to Cr3+ and the lattice distortion which improves the parity forbidden transition of Cr3+. The mechanism of excellent luminescence thermal stability is revealed from the following perspectives: thermal activation energy, the Huang–Rhys factor and the thermal ionization effect. Benefiting from the excellent performance of CSGG:Cr3+,Ce3+ NIR phosphors, the combination with blue light chips demonstrates their potential applications in night vision security, biological imaging, and nondestructive testing.
研究领域:
材料科学
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光学
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生物医学工程
✓ 已验证
DOI
高影响因子
Water
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2021
·Vol. 13
·期 21
·3035
·
IF 3.103
Xinlu Qu,Haowei Wu,Tianyang Zhang,Qianhong Liu,Mu Wang,Mohamed Yateh,Yulin Tang
As an emerging light source, ultraviolet light emitting diodes (UV-LEDs) are adopted to overcome the shortcomings of the conventional mercury lamp, such as mercury pollution. The degradation of chloramphenicol (CAP) using three UV-LED-based advanced oxidation processes (AOPs)—UV-LED/persulfate (UV-LED/PS), UV-LED/peroxymonosulfate (UV-LED/PMS) and UV-LED/chlorine—was investigated. Results indicate that CAP can be more effectively degraded by the hybrid processes when compared to UV irradiation and oxidants alone. Degradation of CAP using the three UV-LED-based AOPs followed pseudo-first-order kinetics. The degradation rate constants (kobs) for UV-LED/PS, UV-LED/PMS, and UV-LED/chlorine were 0.0522, 0.0437 and 0.0523 min−1, and the CAP removal rates 99%, 98.1% and 96.3%, respectively. The degradation rate constant (kobs) increased with increasing oxidant dosage for UV-LED/chlorine, whereas overdosing reduced CAP degradation using UV-LED/PS and UV-LED/PMS. Ultraviolet wavelength influenced degradation efficiency of the UV-LED based AOPs with maximum CAP degradation observed at a wavelength of 280 nm. The application of UV-LED enhanced the formation DBPs during subsequent chlorination. uUV-LED/PMS produced more disinfection by-products than UV-LED/PS. Compared to UV-LED, UV-LED/PS reduced the formation of dichloroacetonitrile and trichloronitromethane during chlorination owing to its capacity to degrade the nitro group in CAP. The intermediates dichloroacetamide, 4-nitrobenzoic acid, 4-nitrophenol were produced during the degradation of CAP using each of UV-LED, UV-LED/PS and UV-LED/chlorine. The present study provides further evidence supporting the application of UV-LED in AOPs.Keywords:chloramphenicol;advanced oxidation processes;UV-LED
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2021
·Vol. 19
·期 1
·1-14
·
IF 10.435
Li Lihua,Chen Lingling,Huang Ling,Ye Xiangling,Lin Zefeng,Wei Xiaoming,Yang Xianfeng,Yang Zhongmin
Triple-negative breast cancer (TNBC) is one of the most daunting diseases, low toxicity and efficient approaches are in urgent demand. Herein, we developed degradable mesoporous manganese carbonate nanocubes (MnCO 3 NCs), incorporated with survivin shRNA-expressing plasmid DNA (iSur-pDNA) and riboflavin (Rf), namely MRp NCs, for synergistic TNBC therapy. The MnCO 3 , itself, could generate O 2 and CO 2 under H 2 O 2 and thus relieve the hypoxia and acidic tumor microenvironment (TME). Furthermore, the MnCO 3 NCs exhibited high Rf loading capacity and iSur-pDNA delivery ability after polyethyleneimine modification. Specifically, MRp NCs decompose in TME, meanwhile they deprived the endogenous expression of survivin gene and significantly amplified the generation of reactive oxygen species after exposure to LED light, resulting in serious tumor destruction. The multifunctional MRp NCs with LED light-driven characters are able to provide a high efficiency, low toxicity and promising strategy for TNBC therapy.
研究领域:
纳米技术
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癌症研究
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材料科学
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生物医学工程
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药学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Yichen Yang,Xiaojiao Kang,Qiwen Pan,Zhennan Zhu,Wei Lü
Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are gaining significant interest due to their potential in spectroscopic applications. NIR phosphors play a critical role in pc-LED devices by converting visible light into NIR emission with high stability and tunability. In this study, an efficient broadband NIR phosphor, Ca 3 TiTaGa 3 O 12 :Cr 3+ , is developed and systematically investigated. Ca 3 TiTaGa 3 O 12 :Cr 3+ exhibits a broad NIR emission band centered at 790 nm with a full width at half maximum (FWHM) of 202 nm upon 450 nm blue light excitation. The emission bandwidth is further expanded to 303 nm by introducing an optimal amount of Yb 3+ co-doping, which produces a merged ultra-broadband Cr 3+ –Yb 3+ emission. Luminescence and decay kinetic analysis reveal that the resultant ultra-broadband emission originates from effective energy transfer Cr 3+ to Yb 3+ . Moreover, the Yb 3+ co-doping enhances the internal quantum efficiency from 30.5% to 41.3%, and improves thermal stability with emission retention increasing from 42.6% to 57.4% at 150 °C. The Ca 3 TiTaGa 3 O 12 :Cr 3+ and Ca 3 TiTaGa 3 O 12 :Cr 3+ , Yb 3+ phosphors are successfully integrated with a 450 nm blue LED chip, demonstrating their potential for practical NIR pc-LED device applications in night vision and bioimaging.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2026
·
IF 5.1
Chuyu Qin,Mengyang Wang,Aixin Luo,Guangda Du,Jiaxian Liu,Zekai Hong,Tingshi Yang,Pu Zhang,Chunlin Ma,Luyu Cao,Yayun Zhou,Bingfeng Fan
The realization of high-performance color conversion micrometer-scale light-emitting diodes (micro-LEDs) is fundamentally limited by the planar thin-film geometry of current color-conversion layers (CCLs), leading to low light extraction efficiency, severe optical crosstalk, and restricted emission control. Here, we report a scalable strategy to engineer high-performance three-dimensional (3D) CCLs via digital light processing (DLP) printing of mesoporous-silica-confined perovskite quantum dots (PQDs). The CsPbBr3 PQDs, uniformly grown inside mesopores, are embedded in photocurable resins, achieving an internal quantum efficiency of 72.4%, external quantum efficiency of 64.6%, and exceptional environmental stability over 40 days without degradation. Optical simulations reveal that 3D architectures such as hemispheres, cylinders and cones offer geometry-tailored emission profiles unachievable by planar films, enabling tunable trade-offs between pixel-plane irradiance and far-field angular distribution. The proof-of-concept DLP-printed micro-hemispherical arrays exhibit uniform geometry and homogeneous QD distribution, making them suitable for integration with micro-LED chips (<50 µm). This approach transforms micro-LED color conversion from uncontrolled thin films to deterministic 3D structures, paving the way for high-efficiency, low-crosstalk pixels in AR/VR, wearable, and projection displays.
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产品关联
DOI
高影响因子
TALANTA
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2026
·
IF 6.7
Youjun Zeng,Hao Du,Jun Yang,Chenglong Guo,Yufeng Yuan,Jie Zhou
Blood-based detection of Tau presents a promising strategy for early screening of Alzheimer's disease (AD). This study introduces a novel surface plasmon resonance imaging (SPRi) platform that employs an array of low-cost monochromatic LEDs as excitation light sources, effectively replacing conventional spectrometer-based systems to achieve cost reduction and enhanced operational stability. We developed an adaptive fitting algorithm that automatically identifies optimal spectral bands for analysis, enabling high-precision SPR measurements across an extended dynamic range. The system demonstrates exceptional performance with a RI resolution of 1.96 × 10 −6 RIU and a dynamic range of 0.0136 RIU. To further enhance sensitivity, we implemented a signal amplification strategy based on localized sample heating, which promotes molecular enrichment at both the center and periphery of evaporating droplets. This approach increases local target concentrations and enhances interaction probability with surface-immobilized capture probes. The label-free amplification method eliminates the requirement for secondary signal enhancement, substantially simplifying the detection workflow. Using this integrated approach, we achieved ultrasensitive Tau detection with a limit of detection (LOD) of 437 fg/mL (7.95 fM) and established a linear detection range spanning from 1 pg/mL to 10 ng/mL. This technique provides a robust platform for AD-related Tau quantification and demonstrates significant potential for facilitating early AD diagnosis.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhengjiang Liu,Junjie Tang,Jiani Wu,Timur Borjigin,Bing Bai,Yaqiong Wang,Hedong Huang
Herein, we report a Fe 2 O 3 /CeO 2 porous nanotube as a high-performance heterogeneous photo-Fenton-like catalyst, featuring a stable Fe-O-Ce heterojunction confirmed by XPS and TEM. This structural design, coupled with enhanced visible-light absorption induced by Fe 2 O 3 modification on CeO 2 , constitutes its core structural innovation. Under 440 nm blue LED irradiation and at pH 5, this composite achieves complete degradation of 80 mg/L methyl orange within 60 min with 0.5 mL of 15 % H 2 O 2 , exhibiting remarkable catalytic efficiency. Radical trapping experiments identify h + and OH as dominant active species, with O 2 − playing a secondary role. Notably, the catalyst maintains excellent performance after 4 cycles, highlighting its superior stability. Furthermore, CeO 2 facilitates electron transfer from H 2 O 2 to Fe 3+ , accelerating the Fe 3+ /Fe 2+ redox cycle. This accelerated cycle not only enhances H 2 O 2 activation and OH generation but also expands the pH operating range-overcoming the narrow pH limitation of traditional Fenton systems. Band analysis across the Fe 2 O 3 /CeO 2 heterojunction further clarifies the charge separation and transfer pathway underlying this enhanced catalytic behavior. With its exceptional co-catalytic activity, broad pH adaptability, and high stability, Fe 2 O 3 /CeO 2 porous nanotubes demonstrate great practical potential for real wastewater treatment. This work not only provides an efficient strategy for wastewater decontamination but also offers new insights into designing heterojunction-based catalysts for environmental remediation.
研究领域:
环境催化
·
材料科学
·
废水处理
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纳米技术
·
高级氧化工艺
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 13
·2192
·
IF 5.1
Aihemaitijiang Aihaiti,Yuanpeng Li,Xinmeng Huang,Yuting Yang,Ailikemu Mulati,Jiayi Wang
Pomegranates are rich in nutrients and classified among ready-to-eat fruits and vegetables. Although this ready-to-eat produce offers convenience, it presents risks associated with pathogenic microorganisms, highlighting the need for pre-sale disinfection. Ultraviolet light-emitting diodes (UV-LEDs) constitute an innovative non-thermal processing technology for food products, offering reduced heat generation and lower energy consumption compared to traditional ultraviolet (UV) irradiation methods. This study analyzed the effects of UV-LED technology on pomegranate seed quality over 0 to 5 days of storage. The results demonstrated significant increases in anthocyanins, polyphenols, ascorbic acid, and the antioxidant capacity in pomegranate following treatment, peaking on day 3. In contrast, the control group showed declining trends. After treatment, the aerobic mesophilic counts and counts of mold and yeast levels during storage measured between 2.73–3.23 log CFU/g and 2.56–3.29 log CFU/g, respectively, significantly lower than the control group. Non-targeted metabolomic analysis showed that UV-LED treatment prompted modifications in the biosynthetic pathways of flavonoids, flavonols, and anthocyanins. The expression of peonidin-3-O-rutinoside chloride increased by 46.46-fold within the anthocyanin biosynthesis pathway. In conclusion, UV-LED treatment represents a potential approach to the disinfection of ready-to-eat fruits and vegetables.
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2017
·
IF 4.075
Bin Liu,Jinhuan Li,Lufang Wang,Jiahui Ren,Yanfang Xu
By a simple one-step reduction self-assembly process, a three-dimensional composite material graphene/polypyrrole aerogel (GPA) has been fabricated. The polypyrrole nanorods (PNRs) not only act as a spacer to avoid the graphene sheets aggregation and enhance mechanical strength but also effectively adjust the permittivity of GPAs to gain expected microwave absorption (MA) performance. Compared with pure graphene aerogel (GA), these aerogels with the ultralow density of around 0.020 g/cm 3 show improved MA performance that the maximum reflection loss (RL) can reach −51.12 dB at the frequency of 6.4 GHz, and the effective absorption bandwidth (RL < −10 dB) was 5.88 GHz (10.48–16.36 GHz) corresponding to an absorber thickness of 3.0 mm. Such outstanding MA performances are attributed to the polarization and relaxation process that is correlated with the transformed microstructure of GPAs.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）