Advanced Physics Research
·
2024
·Vol. 4
·期 2
·2400104
·
IF 0
Hengli Zhu,Jiaping Zhang,Panqin Wang,Shaoxing Lyu,Hengwei Lin,Jiaren Du
Trap-related inorganic photochromic materials coupled with regulated luminescence have attracted extensive interest due to their great potential in optoelectronic devices, optical memory, and multiple anti-counterfeiting applications. Combining photochromism with luminescence modulations enables the light-driven reversible manipulation of optical information in both dark and bright fields. However, photochromism induced luminescence modulation is still restricted to monochromatic visualization with only emission intensity variations. To this end, the limitation of the common single-wavelength modulation is overcome by integrating the matrix (Sr 2 YGaO 5 ) and dopant (Sm 3+ ) emissions mutually together to achieve wavelength variations. Color-changing emission is identified with a large Commission Internationale de L'Eclairage chromatic coordinate difference. The compatible coexistence of matrix/rare-earth emission centers together with abundant photo-active traps contributes to the superior optical integration and matrix-emission-assisted photochromism enables a distinct color variation in dual fields. This work provides a good example of designing one single material with color changeable characteristics in both bright and dark fields.
研究领域:
光学材料
·
无机化学
·
光电子学
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 35
·1-11
·
IF 2.8
Sui Meirong,Gu Xiuquan
In this work, a facile metal organic decomposition route was developed for synthesizing the ZnO quantum dots (QDs), which were then in situ deposited onto a BiVO 4 nanoporous films for enhancing its photoelectrochemical (PEC) water oxidization activity. The results shows that there aren’t significant changes in both the color and surface morphology of the BiVO 4 membrane after QD modification. Nevertheless, the ZnO/BiVO 4 photoanode demonstrates a maximum photocurrent density of 2.56 mA/cm 2 at a bias of 1.23 V RHE with simulated solar irradiation, which is almost 2 times higher than that of the unmodified BiVO 4 one. The enhanced PEC performance is attributed to the formation of type II heterojunction, which promotes charge transfer/separation. This work might shield light on enhancing the PEC performance of BiVO 4 towards water oxidization.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Xiangyu Wang,Tingbo Zhang,Jiawen Fan,Tong Wei,Cai Ning,Yingdong Han,Liwei Wu,Jiao Cui
The security monitoring of valuables is a crucial concern to ensure the stable development of human social business activities, scientific research, production, and daily life. The implementation of security precautions has traditionally involved the mere placement of items in safes. However, the formidable task of ascertaining whether valuables have been compromised during storage remains a significant challenge. Photochromic materials are important intelligent substances that can be employed as a potential candidates for security monitoring. However, previous studies have predominantly focused on achieving prominent photochromism by utilizing specific light sources such as ultraviolet, laser, and X-ray radiation. In light of these existing challenges, a design strategy engaging high entropy is proposed to improve the photochromic performance. By selecting a diverse range of volatile metal elements, the A-site high entropy is realized within the ABO 3 perovskite structure, enabling the construction of various defects. This results in the successful realization of the material's sensitive response to sunlight, thereby validating the feasibility of the photochromism boosted by a high entropy strategy. The developed photochromic materials for intrusion indication demonstrate the capability to operate autonomously, making it a crucial component in high-level security monitoring systems and presenting a novel approach toward enhancing security protection in traditional domains.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 31
·e202401288
·
IF 1.9
Wenhui Liang,Yanting Chen,Muwei Huang,Zeyu Song,Cancan Li,Yanhong Zheng,Zhongsheng Yi
Graphical This manuscript employs computational simulations and multispectral analysis to elucidate the binding sites and underlying mechanisms of the interaction between halogenated phenols (HPS) and transthyretin (TTR), thereby enhancing the comprehension of their molecular dynamics and the consequent toxicological implications of HPS exposure. Moreover, it contributes significantly to the identification of potential environmental endocrine-disrupting compounds. The aim of this study was to understand the interaction between transthyretin (TTR) and halogenated phenols (HPs) including 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP), pentachlorophenol (PCP), 2-bromophenol (2-BP), 2,4-dibromophenol (DBP) and 2,4,6-tribromophenol (TBP). Computer simulation and multi-spectroscopy techniques were used to investigate the interaction. The fluorescence of TTR was found to be quenched through static quenching and non-radiative energy transfer by HPs, suggesting that the binding process between HPs and TTR was primarily influenced by van der Waals forces and hydrogen bonds. ANS substitution experiments indicated that HPs interacted with TTR at the T4 binding site. Three-dimensional fluorescence spectra and Fourier transform infrared spectroscopy were used to investigate the conformational and microenvironmental changes of TTR resulting from the interactions with HPs. Additionally, molecular docking and reduced density gradient analysis were used to identify the specific residues and binding forces involved in the interaction between HPs and TTR binding sites. The findings were subsequently validated through quantum chemical analysis. This research integrates state-of-the-art multispectral analytical methodologies with sophisticated computational modeling to introduce an innovative approach for dissecting the interactions between halogenated phenols (HPs) and transthyretin (TTR). This methodology offers a novel avenue for investigating the molecular interplay between HPs and TTR, thereby providing critical insights that are instrumental in assessing the latent toxicity of these compounds.
研究领域:
生物化学
·
环境科学
·
计算生物学
·
毒理学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
J. Ding,X. Cui,Q. Ren,Y. Mao,J. Zhang,G. Zhou,X.-M. Zhang
Organic-inorganic metal halides have garnered extensive attention due to their versatile structures as well as fascinating optical properties , among which especially antimony halides are the focus of recent research. Herein, we design a series of novel zero-dimensional (0D) antimony halides of (C 13 H 14 N 3 ) 3 SbCl 6– x Br x ( x = 0, 3, 6) with bright and tunable broadband emissions from yellow (576 nm) to orange (600 nm), which are attributed to the triplet self-trapped excitons (STEs) of the six-coordinated [SbX 6 ] 3– (X = Cl − or Br − ) units. The role of halogens on their specific 3 P 1 → 1 S 0 transition is determined, wherein Cl/Br transmutation reveals a common law modulating photoluminescence behaviors. Furthermore, a new two-step compound technology is innovatively developed for performance optimization, enabling by incorporating the pristine antimony halides into polymethyl methacrylate (PMMA) with high transparency and strong moisture resistance . The composites (C 13 H 14 N 3 ) 3 SbCl 6– x Br x /PMMA ( x = 0, 3, 6) were fabricated through a demanding technology that significantly improve the processability and water stability of antimony halides while maintaining high photoluminescence quantum yields . This work not only proposes a method for halogen substitutions to tune emission, but also opens up a feasible research avenue for performance optimization in the multifunctional luminescence materials.
研究领域:
材料科学
·
光学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Siman Fang,Yongji Xin,Lei Ge,Changcun Han,Ping Qiu,Linen Wu
The novel ceria (CeO 2 ) hollow structures with uniform cubic, polyhedral and sphere shapes were successfully synthesized by template-engaged coordinating etching of shape-controlled Cu 2 O crystals. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microcopy (TEM), high resolution of transmission electron microcopy (HRTEM), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The photocatalytic oxygen evolution via water oxidation was investigated for CeO 2 hollow structures with varied shapes under visible light irradiation. The photocatalytic results indicate that polyhedral CeO 2 nanocages show the highest photocatalytic activity, in contrast with spherical CeO 2 hollow structure and cubic CeO 2 hollow structure. The excellent catalytic activity can be attributed to the unique properties of the polyhedral CeO 2 nanocages, including efficient light refection through the inner shells, more active sites for enhancing separation efficiency of charge carriers. It is expected that this study could provide helpful results for designing and exploration of novel hollow structures with tunable photocatalytic performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 38
·13368-13377
·
IF 4.099
Xuefeng Yang,Xiugang Wu,Di Zhou,Junting Yu,Guohua Xie,Duncan W. Bruce,Yafei Wang
Polarised phosphorescence has a bright future in backlighting for conventional liquid crystal displays due to its theoretical 100% internal quantum efficiency and low cost. However, there are scarce reports on polarised phosphorescence from metallomesogens. In this contribution, a platinum-based metallomesogen containing a mesogenic biphenyl (Pt1) was prepared and characterised. To further explore the effect of the substituent on mesophase and emission properties, a related complex Pt2 containing a tetraphenylethene (TPE) moiety was also synthesised. Both complexes melt at elevated temperatures but thereafter do not appear to crystallise on cooling. Complex Pt1 shows an enantiotropic nematic phase from which a broad emission can be seen when spread as a film; in solution, an intense, sky-blue emission is observed. For Pt2, which shows a monotropic SmA phase, the emission in the condensed phase is suppressed and there is only weak emission in solution. Polarisation-dependent photoluminescence with a polarised ratio of 5.4 was obtained for the aligned film of a Pt1:polyimide mixture. Using Pt1 as an emissive layer, non-doped, polarised organic light-emitting diodes presented a broad emission spectrum in the range of 450–900 nm with a polarised ratio of 1.33 and the highest external quantum efficiency of 1.1%. This research has an important significance for achieving broad-based polarised phosphorescence from platinum complex-based metallomesogens.
研究领域:
材料科学
·
光学
·
有机电子学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Yuanchao Liu,Yanwu Chu,Zhenlin Hu,Siyu Zhang,Shixiang Ma,Muhammad Shehzad Khan,Feng Chen,Deng Zhang,Lianbo Guo,Condon Lau
Cleaner cosmetic production is crucial to our health. The detection of heavy metals in cosmetics is a hotspot in the past several years. Apart from the conventional analytical methods, laser-induced breakdown spectroscopy (LIBS) was recently applied as a rapid technique for trace heavy elements determination. However, the sensitivity obtained from the reported works do not, or marginally reach, the heavy metals standards in cosmetics required by regulatory bodies. Therefore, the sensitivity of LIBS still needs improvement to meet the standards. For this purpose, we developed an ultrasound-assisted extraction sample pretreatment method (UAE) for LIBS to detect the trace heavy metals lead (Pb) and cadmium (Cd) in low-quality cosmetics. A standard addition method was employed for elemental quantification by adding known amounts of analytes into the extracted solutions. Then, the calibration curves of Pb and Cd were established with good linearity. The limit of detections (LOD), ranging from 0.028 mg/kg (Pb) to 0.016 mg/kg (Cd), demonstrated the high-sensitivity of our work. Moreover, compared with the results by inductively coupled plasma mass spectrometry (ICP-MS), the LIBS indicated promising accuracy as the relative errors (RE) of Pb and Cd were 3.5% and 4.8%, respectively. The results indicated that the LIBS with UAE method is a sensitive and accurate technique for trace heavy metals determination in cosmetics.
研究领域:
分析化学
·
环境科学
·
健康与安全
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Xue Meng,Zhijun Wang,Xiaoxue Huo,Mingxin Zhou,Yu Wang,Panlai Li
Near-infrared (NIR) light attracts attention because of its promising applications in night vision, anti-counterfeiting, biosensors, and measuring food composition and freshness. However, new NIR light sources with excellent thermal stability, higher efficiency, and superior photoelectric conversion efficiency are still a significant challenge. In this study, CaZrTaGaO7:0.01Cr3+, which can convert visible light into NIR light, was synthesized using a high-temperature solid-state method, and the crystal structure, morphology, site preference, and luminescence properties were investigated. Under 460 nm blue light excitation, the phosphor produces a broadband NIR emission in the 600–1100 nm region (λmax = 829 nm), with a full width at half maximum of 178 nm, an internal quantum efficiency of 90.7%, and an excellent thermal stability of 84.8% at 423 K. A NIR light emitting diode (LED) was prepared using a 460 nm LED chip and CaZrTaGaO7:0.01Cr3+, and the new compound can produce strong NIR emission (273 mW at 100 mA) with a photoelectric conversion efficiency of 11.8%. Photographed phosphor-converted LEDs (pc-LEDs) with a regular camera and captured pc-LEDs in operation in the dark. The results indicate that this material may provide a new option for high power NIR night vision and other applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2022
·
IF 4
Dongna Zou,Ruxangul Jamal,Tursun Abdiryim,Lielie Liu,Haile Liu,Nana Fan
Here, the ZnO-NRs/poly(EDOT-Pyridine-EDOT) core/shell heterostructure nanoarrays was prepared by the electrochemical polymerization of D-A-D type monomer (the 3,4-ethylenedioxythiophene(EDOT, donor) endcapped trimer with the pyridine(acceptor) as internal unit) on ZnO-NRs. This core/shell heterostructure nanoarrays was combined with ZnO-NRs to form p-n heterojunction for UV photodetector by face to face clamping of the two electrodes (ZnO-NRs/poly(EDOT-Pyridine-EDOT) and ZnO-NRs). The current-voltage and current-time curves under bias voltages of 1–6 V were tested, and the photoresponses of heterojunctions and bias voltages to UV light irradiation were systematically studied. The results showed that the poly(EDOT-Pyridine-EDOT) (poly(BPE)) uniformly covered ZnO-NRs and formed a core-shell structure, which was beneficial to increase the contact area between ZnO-NRs and poly(BPE). The ZnO-NRs/poly(BPE) heterojunction effectively improved the response performance of the UV photodetector and exhibited the highest photoresponsivity under 5 V bias voltage. The responsivity (R), detectivity (D*) and external quantum efficiency (EQE) were 150.87 A/W, 2.18 × 10 12 Jones and 51,351.5 %, respectively.
研究领域:
材料科学
·
光电材料与器件
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2021
·Vol. 68
·期 4
·1738-1745
·
IF 2.917
Zong-Tao Li,Jie-Xin Li,Zi-Hao Deng,Jia-Yong Liang,Jia-Sheng Li
Quantum dots (QDs) are promising materials for various optoelectronic applications. However, the efficiency of QD white light-emitting diodes (QD-white-LEDs) is not at the desired level, particularly when the QD concentration in the silicone matrix is high and the corresponding mechanism has not been fully elucidated. In this study, we experimentally and theoretically investigated the aggregation-induced scattering (AIS) effect of QDs in silicone and unraveled the origin of low efficiency for QD-white-LED devices. Three-dimensional finite-difference time domain and ray tracing simulations were carried out to establish the AIS model for QDs. Results indicate that the AIS effect is stronger for higher QD concentrations and leads to a larger effective aggregate size (EAS), which was confirmed by comparing with the experimental results of QD-silicone films. Furthermore, we found that the AIS effect causes a significant reduction in the radiant efficiencies of QD-white-LEDs when the EAS exceeds 50 particles, which is validated by fabricated devices. According to the spectral energy analysis, the low efficiency of QD-white-LEDs can be attributed to a strong AIS effect at high QD concentrations, causing severe backscattering and reabsorption loss. This study is also important for nondestructive testing the degree of aggregation demonstrated by QDs in a silicone matrix and for precisely modeling QD-white-LEDs.
研究领域:
光学
·
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2017
·Vol. 49
·期 3
·520-525
·
IF 2.969
Yun Ling,Wen-Chang Xie,Wei-Li Wang,Meng-Kai Li,Jing Tang,Guo-Kun Liu,Run-Wen Yan,De-Yin Wu
Taking the fingerprint characteristics of Raman spectroscopy, the dimerization of p-nitrothiophenol (PNTP) to 4-nitrophenyl disulfide in air was investigated, which could be accelerated by the external laser illumination. The dimerization was qualitatively confirmed by both mass spectroscopy experimentally and by Raman spectrum simulated calculations theoretically and quantitatively analyzed by Raman spectroscopy in a simple and quick manner. On the basis of the inductively coupled plasma optical mass spectrometry analysis, the dimerization was possibly ignited by the trace metal residues as catalyst in the PNTP. This study clearly shows that it is very important to strictly and preciously control the experimental conditions of Raman measurement and other laser-based spectroscopies to avoid any wrong conclusion during the characterization or identification. Different to the plasmon-induced photochemical reactions, we reported the photochemical reaction of PNTP to 4-nitrophenyl disulfide, which is free of the plasmoic effect from the metal nanostrucutres. On the other hand, the photochemical dimerization reaction may provide a new and important guideline for the formation of thiols to disulfides.
研究领域:
分析化学
·
物理化学
·
光谱学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）