Journal of Esthetic and Restorative Dentistry
·
2024
·Vol. 36
·期 10
·1466-1476
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IF 3.2
Afnan O. Al-Zain,Eman H. Ismail,Abdulrahman A. Balhaddad,Osamah Toras,Yousif Alharthy,Rafa Alsultan,Abeer Alrossais,Richard B. Price
Objective This study evaluated the completeness and accuracy of information in LCU instruction manuals from 40 manufacturers. Materials and Methods Instruction manuals from 40 LCUs (20 from leading manufacturers and 20 budget units) were reviewed. Twenty-eight parameters across five categories were assessed using a binary scale (0=incorrect/missing, 1=correct). The categories and their respective evaluation scores were: LCU characteristics (43%), instructions for use (7%), safety precautions (14%), maintenance recommendations (29%), and regulatory certification (7%). These scores were combined to produce a final score. Results Scores from leading manufacturers ranged between 46-86%, while the budget category ranged from 18-68%. All manuals provided information about the wavelength/spectrum of the LCU. Only Valo X and Valo Cordless reported power values and used the term “irradiance” instead of “intensity.” Details such as LED type and active tip emission area were often missing. Instructions on how to use the LCU to photo-cure resins were frequently limited. Although most manuals addressed safety precautions, several lacked details on heat issues and general health precautions. All manuals included maintenance instructions, though information on replacement parts was often missing. Among the LCUs, 85% stated they were CE certified, 32% held both FDA and CE certification, and 63% claimed compliance with ISO and/or IEC standards. Conclusions There were notable differences in the completeness and accuracy of the instruction manuals. Manuals from major manufacturers generally provided more comprehensive information than their budget counterparts. Clinical Significance Instruction manuals should contain accurate information to help clinicians deliver the highest standard of care. The lack of important information about the LCUs in the manuals is concerning.
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Small
·
2023
·Vol. 20
·期 9
·2306158
·
IF 13.3
Weiqi Huang,Xianyu Song,Yanqiang Li,Yang Zhou,Qianting Xu,Yipeng Song,Han Wang,Minjuan Li,Sangen Zhao,Junhua Luo
Birefringent crystals have important applications in optoelectronics areas due to their ability to modulate and polarize light. Despite increasing discovery of the birefringence potential of new crystals, it remains a great challenge to optimize both birefringence and bandgap simultaneously. Herein, a 1D chain-like hybrid perovskite birefringent crystal designed by 3D-to-1D dimensional tailoring, (GAM) 2 PbI 7 ·H 2 O (GAM = C 5 N 10 H 10 ), is presented, showing enlarged birefringence of 0.49@550 nm and enlarged optical bandgap (2.48 eV). Consequently, the birefringent quality factor of (GAM) 2 PbI 7 ·H 2 O is up to 2.8 times that of the template MAPbI 3 . In particular, the birefringence is much larger than those of commercial birefringent crystals and surpasses that of the vast majority of hybrid perovskite known to date. Theoretical calculations reveal that the strongly anisotropic arrangement of (GAM) 2.5+ π -conjugated cations and ordered PbI 6 octahedra contributes to the large birefringence and wide bandgap of (GAM) 2 PbI 7 ·H 2 O. It is believed that this work will provide a new pathway toward the rational design and synthesis of hybrid perovskite birefringent crystals for compact wide-bandgap polarization dependent devices.
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ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Chun-Hong Gao,Fu-Xing Yu,Zi-Yang Xiong,Ya-Jie Dong,Xing-Juan Ma,Yue Zhang,Ya-Lan Jia,Run Wang,Ping Chen,Dong-Ying Zhou,Zu-Hong Xiong
All-inorganic cesium halide perovskite materials are intensively investigated due to their excellent photoelectric characteristics, but poor film coverage, unbalanced charge carrier transporting and insufficient exciton harvesting are remaining challenges to be overcome in order to achieve high electroluminescent (EL) performance in perovskite light-emitting diodes (PeLEDs). Here we show that these problems can be solved by introducing both a phosphorescent sensitizer (FIrpic) and an electron transporting material (TmPyPB) into all-inorganic cesium halide perovskite (CsPbBr 3 ). And highly efficient green PeLEDs with full coverage CsPbBr 3 :TmPyPB:FIrpic film as the emissive layer have been achieved, exhibiting the maximum luminance of 37784 cd/m 2 , the maximum current efficiency of 22.6 cd/A and the corresponding maximum external quantum efficiency (EQE) of 5.85%, where the EQE is 48-fold to that of bare CsPbBr 3 PeLEDs. The enhanced EL performance is attributed to less non-radiative current leakage , better film surface passivation effect, balanced charge carrier injection and transportation, as well as better exciton harvesting. It is believed that our work will provide an effective strategy to further improve EL performance of PeLEDs via better exciton harvesting.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yongbo Zhou,Ye Tian,Arfan Bukhtiar,Zhijie Zhou,Hualin Zhao,Wenchao Lin,Xianci Zhong,Bingsuo Zou
Among a II–VI semiconductor, ZnTe is an inherent p-type semiconductor and exhibits strong emissions within the visible range, which make it suitable for various optoelectronic applications. Here, we have obtained the ZnTe- and Fe-doped ZnTe microbelt by CVD growth. Near-infrared (NIR) luminescence from 600 to 1000 nm can be seen in the PL emission spectra of ZnTe microstructure excited by CW laser, along with the appearance of multimode peaks because of the optical microcavity. The NIR luminescence in ZnTe comes from the presence of Zn vacancies due to polymorphous transition of ZnTe in the vapor solid mechanism. The PL emission under femtosecond pulsed laser excitation produces a low-threshold laser line which is near the band edge of the ZnTe microbelt, which is quite different from the continuous wave excitation PL spectrum. The time of photon–matter interaction and the fast and slow coherent recombination of exciton and defect states determine their emission distribution. As the excitation pulse changes, the different optical behaviors generated by the semiconductor may be applied in many photonic devices. We also found that in addition to the two sides of the microbelt that form the FP cavity in the pure ZnTe microbelt, the interface in the doped ZnTe microbelt can also form the FP cavity together with one side of the microbelt; the presence of interface is due to the presence of impurities.
研究领域:
光电子学
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半导体物理
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光子学
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材料科学
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纳米光子学
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Nature Communications
·
2026
·Vol. 17
·期 1
·767
·
IF 15.7
Wang Zhenyu,Yang Yingguo,Luo Guizhong,Xu Wenwu,Liu Chengyu,Yang Tianqi,Ji Wenyu,Zhang Fujun,Lu Min,Zhang Yu,Wu Zhennan,Bai Xue
Metal nanoclusters, as unique metallic molecules comprising a few to hundreds of metal atoms and stabilized by organic monolayer ligands, have recently emerged as a novel class of chromophores and hold great promise for flexible light-emitting diodes. However, the fabrication of flexible metal nanoclusters-based light-emitting diodes is still hindered by low photoluminescence quantum yields, suboptimal solution processability, and consequently compromised emitter-film quality with random dipole orientations. This work addresses these limitations through strategic molecular engineering by employing 1, 3-di(9H-carbazol-9-yl)benzene as a π-conjugated mediator. This approach enables supramolecular assembly to achieve π-π coupling-mediated horizontal dipole alignment in nanocluster solid films, allowing an external quantum efficiency of up to 26.4% in flexible light-emitting diodes with a maximum brightness of 41,365 cd m −2 , and retaining more than 94% of initial efficiency after 2000 bending cycles at 3 mm curvature radius.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Ying Zhang,Jie Zhong,Sihan Chen,Hongwei Zhang,Mingdeng Wei
Interfacial water plays a crucial role in charge transfer and energy conversion at the semiconductor–liquid junction. Here, we firstly demonstrate that TiO 2 with varied crystal phases generates a region of particle-free and negatively charged water at the TiO 2 –water interface without light. Upon irradiation, a mixed-phase TiO 2 electrode (anatase: rutile ≈ 7:3) paired with FTO generated a stable photovoltage of 0.32 V in deionized water without any added redox couples. This photovoltage correlates with surface hydrophilicity as well as crystal-phase composition, revealing a previously overlooked interplay between TiO 2 and interfacial water. These experimental findings not only provide new insights into photoinduced charge dynamics and self-cleaning mechanism at the TiO 2 –water interface, but also suggest an alternative pathway for light-to-electrochemical energy conversion directly from water.
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2026
·
IF 2.9
Yan-Ping Shi,Rong-Yao Gao,Hao-Yi Wang,Jian-Wei Zou,Nami Yamano,Feng-Qin Dong,Junrong Zheng,Jian-Ping Zhang
Carotenoid (Car) in photosynthesis plays an essential role in photoprotection by quenching chlorophyll triplet excitation (3Chl*) via a Chl-to-Car triplet energy transfer (TET). However, mechanistic studies on the Car triplet photoprotection (CTP) have been complicated by the involvement of the O2 quenching and the complexity of the thylakoid membrane. To clarify the interplay of the TET with the effects of O2 and lipid–protein interaction, we prepared nanodiscoidal lipid–protein assemblies of the light-harvesting complexes of photosystem II (LHCII) of Bryopsis corticulans and spinach and examined their triplet excitation dynamics in a broad temporal regime of 1–105 ns. For both kinds of LHCII complexes, besides the well-known ultrafast TET at both L1 and L2 sites, an O2 insensitive, slow TET reaction at the L1 (but not L2) site proceeding with a time constant of 11–25 ns was verified. Lipid membranes can substantially accelerate the slow TET reaction and prolong the 3Car* lifetime. On the other hand, both kinds of LHCII complexes bear a minor fraction of Car-unquenchable 3Chl*, i.e., 2.2% and 4.6% (1.5% and 2.2%) for Bry. corticulans (spinach) LHCII complexes in lipid and aqueous phases, respectively, which can be fully quenched by O2. In addition, the lipid membrane promotes the O2 accessibility of LHCII proteins and, compared to L2, the L1 site is (30–130)% more permissive to O2 access. The heterogeneous 3Chl* deactivation pathways and CTP potency of Bry. corticulans and spinach are compared.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Siyuan Huang,Xia Wang,Jia Liu,Bilyu Hong,Kai Yuan,Youzhu Yuan
Catalytic conversion of CO 2 to light aromatics (including benzene, toluene, and xylene, collectively known as BTX) and olefins is an eco-friendly approach for reducing waste gas emissions, but it remains a significant challenge. Traditional methods that modify the surface acid sites of zeolites to increase BTX selectivity often produce undesired byproducts and involve complex preparation processes. Here, we report a strategy to enhance BTX formation by altering the reaction intermediates using a tandem catalyst composed of metal oxides and dual-zeolite (GaZrO x /SAPO-34/ZSM-5, labelled as GZO/S34/Z5). The inclusion of S34 zeolite facilitates the partial transformation of CO 2 hydrogenation intermediates produced by GZO into light olefins, thereby promoting the aromatic formation in Z5. This results in a 72.6 % selectivity for total aromatics in hydrocarbons, with BTX accounting for a significantly higher selectivity compared to GZO/Z5, representing a 3.4-fold increase from 7.1 % to 24 %. Additionally, by regulating the acid density of Z5, the tandem catalyst with dual-zeolite can directly convert CO 2 and H 2 to 53.5 % aromatics and 25.5 % olefins, with a BTX selectivity of 13.8 % in hydrocarbons. This tandem catalyst design, through adjusting the reaction intermediates, offers an efficient method to inhibit the formation of light paraffin byproducts and enhance BTX selectivity in CO 2 conversion.
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WATER SCIENCE AND TECHNOLOGY
·
2015
·Vol. 71
·期 11
·1679-1685
·
IF 1.106
Hu Xuefeng,Wang Xiaowen,Dong Liuliu,Chang Fei,Luo Yongming
Ag speciation in a chloride medium was dependent upon the Cl/Ag ratio after releasing into surface water. In this study, the photoreaction of in situ formed Ag–Cl species and their effects on aniline photochlorination were systematically investigated. Our results suggested that formation of chloroaniline was strongly relevant to the Cl/Ag ratio and could be interpreted using the thermodynamically expected speciation of Ag in the presence of Cl − . AgCl was the main species responsible for the photochlorination of aniline. Both photoinduced hole and •OH drove the oxidation of Cl − to radical •Cl, which promoted the chlorination of aniline. Ag 0 formation was observed from the surface plasmon resonance absorption during AgCl photoreaction. This study revealed that Ag + released into Cl − -containing water may result in the formation of chlorinated intermediates of organic compounds under solar light irradiation.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Chen Biao,Wang Ying,Xie Ming-Liang,Liu Jiang-Bo,Wang Ling-Yu,Chang Wei,Lin Ling,Li Yu-Long,Sun Meng-Ming,Wang Bo-Han,Ma Yu-Guang
Electrodeposited organic light-emitting diode (OLED) technology requires a spin-coating-free hole-injection layer that simultaneously provides smooth surface morphology, stable energy levels, and compatibility with high-resolution pixel architectures. In this study, electropolymerization of 3,4-ethylenedioxythiophene (EDOT) in poly(styrene sulfonate) (PSS − ) surfactant-solubilized colloidal media is shown to afford poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films with robust surface uniformity and stable energy levels suitable for application as hole-injection layers in OLEDs. Systematic investigation reveals that the hole-injection properties of these films are governed primarily by the colloidal chemistry of EDOT/PSS − surfactant-solubilized systems, rather than by conventional electrochemical parameters. This colloidal regulation modulates the film work function over a practically useful range. Incorporation of optimized films into OLEDs leads to enhanced hole injection and improved device performance, with external quantum efficiency increasing from 2.2% to 7.4% and minimal roll-off. Overall, this work demonstrates a feasible example of realizing spin-coating-free hole-injection layers, offering a potential direction for the development of electrodeposited injection layers for OLEDs.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2026
·
IF 3.5
Jiangtao Liu,Xinyue Liu,Lei Lei,Hui Guo,Ruyi Jin,Zhi Li,Hao Yan
A temperature/light dual-stimuli-responsive polymeric carrier PPEGMA-b-PNIPAM-hv-PMAA-b-PS was designed and synthesized through host-guest mutual recognition, and further applied for pectinase immobilization. Both the host molecule PPEGMA-b-PNIPAM-β-CD and the guest molecule PS-b-PMAA-Azo were prepared via ATRP, hydrolysis, and click chemistry, respectively. The characterization of polymeric structure and morphology was carried out by 1H NMR, FTIR, and GPC. This polymer could self-assemble into spherical micelles in aqueous media, the critical micelle concentration (CMC) and the micellar morphology were also examined by UV–Vis, TEM, DLS, fluorescence spectra, etc. The enzyme immobilization property of the enzyme carrier was investigated too. It was revealed when pH was 4.0, immobilization concentration was 8 U/mL, temperature was 25 °C, and immobilization time was 60 min, both the immobilized amount and the relative activity could reach the maximum. By comparison with free pectinase, immobilized pectinase had a better tolerance to the variation of temperature and pH, and enhanced storage stability and reusability. Moreover, the relative activity of immobilized pectinase could be easily regulated by adjusting the temperature or UV irradiation. So, we can predict this immobilization material has a great application potential in industrial catalysis.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123143
·
IF 7.5
Sobia Yaseen,Saddam Hussain,Sabeen Fatima,Nabi Ullah,Lu Zaijun
Photocatalysis has emerged as a promising strategy for antibiotic remediation in wastewater treatment owing to its environmentally benign nature, high efficiency, and cost-effectiveness. Herein, a PEDOT- NiCo(OH) 2 hybrid photocatalyst is successfully synthesized and, systematically investigated for visible-light-driven tetracycline (TC) degradation. Structural engineering via optimized incorporation of bimetallic hydroxide (NiCo(OH) 2 ) into the PEDOT markedly enhances the specific surface area (∼188 m 2 g −1 ) and pore size of 5.29 nm, while significantly narrowing the optical band gap to ∼1.79 eV, enabling efficient visible light harvesting. Electrochemical analyses demonstrate a substantially reduced charge-transfer resistance and an enhanced photocurrent response for PEDOT-Ni(OH) 2 2:1 (P-NCH21), indicating accelerated interfacial charge transport and suppressed electron–hole recombination. Consequently, P-NCH21 achieves an exceptional TC removal efficiency of 97.6% within 35 min under visible-light irradiation, far outperforming P-NH and PEDOT-Ni(OH) 2 3:1 (P-NCH31), having degradation efficiencies of 67 and 92%, respectively. Electron paramagnetic resonance (EPR) measurements confirm that the generation of reactive oxygen species, such as superoxide (•O 2 ⁻) and (•OH) are the reactive species that drives the photocatalytic degradation process. Furthermore, the hybrid photocatalyst exhibits excellent stability, retaining ∼96.8% of its initial activity after five consecutive cycles. This study highlights the potential of P-NCH21 as an efficient and robust photocatalyst for antibiotic remediation, providing new insights into the design of conductive polymer–based hybrid materials for environmental applications.
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