CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jiale Wu,Jin Hu,Zhongshan Deng,Yongjin Feng,Hongtao Fan,Zhiyi Wang,Kaijun Wang,Qingming Chen,Weijun Zhang
B 2 O 3 -MnO 2 -CdO ternary oxide glasses with amorphous properties were synthesised using the melt-quenching method. Structural and physical property analyses showed that the amount of non-bridging oxygen and the system stiffness increases, and the oxide network filling is more tightly packed as cadmium oxide (CdO) gradually replaces manganese Oxide (MnO 2 ) in the glass. The radiation-shielding performance of the B 2 O 3 -MnO 2 -CdO glasses was evaluated using the shielding parameters calculated by the MCNPX simulation and the Phy-X program. Glasses with 40% and 50% CdO loading exhibited an average specific lead equivalent (PbE) of 0.241 and 0.294 mmPb/mm in the medical X-ray diagnostic area at 0.03–0.08 MeV; thus, they could fully meet the specific PbE requirements for application as "protection devices against diagnostic medical X-radiation". Furthermore, their photon attenuation capability is superior to that of various commercial shielding glasses in fast-neutron nuclear applications at 1°–10 3 MeV. In addition, compared to the borate glass systems studied in the literature, B 2 O 3 -MnO 2 -CdO glasses have fast neutron removal cross-sections of 0.125 cm −1 at a smaller density of 3.9043–4.8135 g/cm 3 , making them potentially excellent fast neutron absorbers.
研究领域:
材料科学
·
辐射防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Huixuan Chen,Jiayu Li,Siwen Tao,Xinhua Tian,Xikun Sun,Ruiqin Gao,Ni Bai,Guo-Dong Li
Developing fast, accurate and sensitive triethylamine gas sensors with low detection limits is paramount to ensure the safety of workers and the public. However, sensors based on single metal oxide materials still suffer from drawbacks such as low response sensitivity and long response and recovery times. To address these challenges, in this work, a series of mesoporous CdO/CdGa 2 O 4 microspheres were synthesized. We optimized the sensor's sensing performance to triethylamine by fine-tuning the ratio of CdO to CdGa 2 O 4 . Among them, CdO:3CdGa 2 O 4 -based sensor demonstrates a rapid response time of 2 s to detect 100 ppm of triethylamine, with a high response value of 211 and exceptional selectivity. Furthermore, it exhibits a low detection limit of 20 ppb for triethylamine, making it suitable for practically testing fish freshness. Crucially, electron transfer between the heterojunctions increases the chemically adsorbed oxygen on the materials’ surface, thereby enhancing the sensor's response sensitivity to triethylamine. This discovery provides new insights and methodologies for the design of highly efficient triethylamine gas sensors.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Bo Huang,Hsueh-Liang Chu,Moo-Chin Wang,Weng-Sing Hwang,Chao Liu,Xiujian Zhao
The crystallite growth and optical properties of cadmium oxide (CdO) thin films annealed at various temperatures and for various durations have been investigated using grazing incident X-ray diffraction (GID), high-resolution transmittance electron microscopy (HR-TEM), selected area electron diffraction, and ultraviolet-visible spectrometry . All the thin films were annealed between 573 and 773 K for 10 to 60 min, respectively. GID results showed that all thin films contain only a single phase of CdO with (111) preferential orientation. The crystallite size of CdO increases with increases in annealing temperature and duration. It was found that the CdO crystallites followed a normal growth with an average activation energy of 13.04 ± 1.34 kJ/mol when annealed at 573–773 K for 10–60 min. The transmission spectra showed that the band gap energies of CdO thin films decreased from 2.474 to 2.050 eV as the annealing temperature increased, while the thin films maintained highly transparent in the visible spectral range.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganics
·
2025
·Vol. 13
·期 8
·275
·
IF 3
Hongmei Wang,Xiaoxu Zhang,Yifei Niu,Zichuan Ma
The recovery and control of volatile organic compounds (VOCs) have gained significant attention. Supported sulfonic acid materials show potential in converting aromatic VOCs into non-volatile sulfonic acid derivatives. However, their effectiveness is closely tied to the anchoring state of the sulfonic acid groups. In this study, two supported sulfonic acids, SSA@CdO and SSA@CaO, were synthesized via the respective reactions of CdO and CaO with chlorosulfonic acid to investigate how the properties of the supports influence sulfonic acid anchoring and reactivity towardo-xylene. Comprehensive characterization and performance tests revealed that sulfonic acid groups on CdO were covalently bonded, forming positively charged sites ([O0.5Cd–O]ɗ−–SO3Hɗ+) with high loading (9.7 mmol/g), enabling excellento-xylene removal (≥95.6%) and adsorption capacity (51.67–91.59 mg/g) at 130–150 °C. In contrast, ion-paired bonding on CaO formed negatively charged sites ([O0.5Ca]+:OSO3H−), which were inactive in electrophilic sulfonation. This work provides new insights for enhancing supported sulfonic acid materials in VOC treatment.
研究领域:
环境化学
·
材料科学
·
催化化学
·
大气污染控制
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Meng Zhang,Yanan Wang,Xu Wang,Bing Zhao,Weidong Ruan
Surface-enhanced Raman scattering (SERS) substrates have shown rapid development in recent years, but the use of transparent conductive oxides (TCOs) in SERS is still limited. Here, a series of In-doped CdO (ICO) NPs with different In3+ doping contents x (x = 0, 0.025, 0.050, 0.075, 0.100, 0.125, 0.150, and 0.200) were synthesized by a hydrothermal method and first employed as a SERS platform. The structures and properties of the ICO NPs influenced by dopant concentration of In3+ ions were characterized by powder X-ray diffraction (XRD), inductively coupled plasma (ICP) analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. Furthermore, the SERS spectra of ICO-MPY were investigated. Interestingly, the enhancement was dominated by the charge-transfer (CT) contribution through the free electrons in conduction bands (CBs). The changes in electronic distributions in energy levels of ICO NPs at different doping contents were explored, and the corresponding effect on SERS was discussed by employing 633 and 785 nm excitation lines, respectively. The CT route was found to be the excitation of electrons from CBs of semiconductor to the LUMO of molecule, which provides a new perspective in understanding SERS mechanisms. The present work provides a new approach to develop potential semiconductive SERS substrates.
研究领域:
材料科学
·
光谱学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Xuting Chen,Linqi Chen,Yuan Jiang,Yijing Wang,Hongbing Li,Jingzhou Li,Xinjie Li,Zeyi Wang,Hongxing Dong,Long Zhang
Fluorescent antennas (FAs) serve as promising optical concentrators for optical wireless communication (OWC) by overcoming the Étendue limit. Quantum dots-polymer nanocomposites exhibit superior optical properties for FAs. However, the poor chemical affinity between the surface ligands of quantum dots (QDs) and the polar functional groups in polymer matrices reduces interfacial compatibility, triggering ligand desorption and interparticle aggregation during photopolymerization. These effects severely degrade the photoluminescence efficiency and long-term stability, thus limiting the practical application of polymer-based FAs. Herein, a high-performance nanocomposite is demonstrated by embedding ODPA-passivated CdSe/CdS QDs into a polyurethane acrylate (PUA) matrix through doctor-blade coating and photopolymerization. Molecular dynamics simulations and density functional theory calculations reveal that QDs improve interfacial compatibility with PUA matrix through hydrogen-bond crosslinking between surface ligands and PUA hard segments, along with alkyl chain-induced plasticization of soft segments. Optimizing the QD concentration results in nanocomposites with a near-unity photoluminescence quantum yield of 99.15% and enhanced environmental stability. The sandwich-structured FA demonstrates a −3 dB bandwidth of 8.6 MHz, a 154 Mbps data rate using orthogonal frequency division multiplexing (OFDM) modulation. This work presents a readily processable nanocomposite system with high efficiency and stability, advancing OWC applications in terrestrial and underwater environments.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Guan Jie,Ma Jianhang,Zhou Likuan,Zou Yihao,Ye Lingbin,Hou Wenjun,Zhang Pan-ke,Dai Xingliang,Zhang Hao,Talapin Dmitri V.,Wang Yuanyuan
Optical patterning of quantum dots is essential for the fabrication of light-emitting diodes displays. However, current patterning methods either require inert environments or compromised quantum dots optical properties under ambient conditions. Here, we report a photoresist-free strategy enabling direct quantum dot patterning in air by using triphenylphosphine, a cost-effective, commercially available molecule that functions simultaneously as a surface ligand, photoinitiator, and oxidation protector. Under light exposure, triphenylphosphine reacts with atmospheric oxygen to trigger solubility changes, allowing precise patterning with resolutions up to 9534 dpi. The resulting devices exhibit external quantum efficiencies of 21.6% (blue), 25.6% (green), and 20.2% (red). We further demonstrate full-color active-matrix quantum dots light-emitting diodes displays by integrating the patterned red, green and blue quantum dots with thin-film transistor backplanes. This work offers a scalable, non-destructive, and environmentally compatible patterning solution for industrial display technologies.
研究领域:
材料科学
·
光电子学
·
显示技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mengdi Ye,Yongmin Duan,Zhaojing Kuang,Wenyan Zheng,Junjie Zhang
With the advancement of modern optics and information technology, luminescent reversible photochromic transparent glasses have attracted considerable attention due to their potential for multimodal data storage. Cadmium-based glasses exhibit excellent photochromic performance, however, their underlying mechanism remains insufficiently elucidated. In this work, Tb 3+ -doped transparent cadmium glass was fabricated, which underwent a rapid transition from transparent to dark brown within 60 s under 365 nm UV irradiation, and completely recovered to transparency upon thermal treatment at 200 ℃, demonstrating high reversibility and cycling stability. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses revealed that the photochromism is primarily governed by oxygen-vacancy-related color centers, wherein Cd sites serve as electron-enriched centers while Pb-O environments accommodate localized holes. Their spatially coupled charge compensation stabilizes the color centers and sustains reversibility. On this basis, reversible modulation of Tb 3+ luminescence was achieved, with a maximum emission contrast of 93.9 %. This study clarifies the mechanism of cadmium-based photochromic glass from the perspective of defect-charge compensation and provides insights into the design of multifunctional glasses for optical information storage.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
信息存储技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yujun Wang,Peng Zhao,Xianghao Kong,Tinghui Zhang,Ning Ye,Zhanggui Hu,Conggang Li
Zero-order waveplates play pivotal roles in polarization manipulation and laser technology, yet the fabrication of zero-order waveplate crystals that simultaneously exhibit small birefringence, a large bandgap, and a wide infrared (IR) transmission range remains a challenge. In this work, a novel germanate optical crystal, Sr2CdGe3O9 (SCGO), featuring isolated rigid [Ge3O9] clusters, was identified through spontaneous crystallization. SCGO demonstrates remarkable thermal stability, with an incongruent melting point of 1054 °C. Importantly, SCGO displays a favorable low birefringence of 0.006@1064 nm, superior to that of the commercially available waveplate crystal α-SiO2 (0.0092@532 nm). Additionally, this crystal exhibits an enlarged bandgap of 4.7 eV, a notably short UV cutoff edge at 225 nm, outperforming most germanates containing transition metals, along with an extended IR transmission window up to 6.0 μm. These exciting optical properties highlight the potential of SCGO as a zero-order waveplate crystal spanning from the UV to mid-IR wavelength range. The presence of isolated [Ge3O9] groups in the SCGO structure introduces a weak structural anisotropy, opening up new avenues for exploring zero-order waveplate materials in wide wavelength ranges.
研究领域:
光学材料
·
晶体工程
·
光子学
·
红外光学
·
固态化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2025
·Vol. 11
·期 50
·
IF 12.5
Yuting Wu,Hancheng Zhu,Zhigao Huang,Hao Zhang,Yinjuan Ren,Hua Shen,Yiming Wu,Yue Wang
Output power of a laser device critically defines the application prospects. Colloidal quantum dots (QDs) have emerged as auspicious laser media; however, the exclusively low-power emission obscures the practical deployment. Here, we resolve this challenge by designing an architecture of QD laser with unprecedented peak powers in megawatt regime. The achievement is enabled by integrating the QDs with exceptional gain metrics with a seed-amplifier laser structure. Transient spectroscopy and theoretical simulation reveal that the narrow emission linewidth and large biexciton binding energy of the QDs act synergistically to enable an enhanced gain performance with submonoexcitonic threshold and record high–saturated gain cross section. A Littman-Metcalf cavity is designed to deliver the continuously tunable laser emission, and the synchronous amplification reaches the megawatt output. The high-power QD laser exhibits high spatial coherence, linear polarization, and operational endurance, which has proved effective as the pump source for spectroscopic research.
研究领域:
光子学
·
纳米材料
·
光学工程
·
激光物理
·
量子点
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2025
·Vol. 72
·期 12
·6872-6878
·
IF 3.2
Xiyuan Zhang,Wenhua Zou,Junhong Duan
In this study, titanium dioxide (TiO ${}_{{2}}\text {)}$ nanoparticles co-doped with varying ratios of Eu and Sm were synthesized using a hydrothermal method. The energy bandgap ( ${E}_{\text {g}}\text {)}$ and conduction band minimum (CBM) of TiO2 nanoparticles doped with 0.45 at% Sm@0.1 at% Eu were adjusted from 3.43 and −3.95 eV to 3.30 and −3.53 eV, respectively, determined from ultraviolet–visible (UV–Vis) absorption spectroscopy and ultraviolet photoelectron spectroscopy (UPS) measurements compared to undoped TiO2. CdSe quantum dot-sensitized solar cells (QDSCs) based on TiO2 doped with 0.45 at% Sm@0.1 at% Eu achieved an optimal power conversion efficiency (PCE) of 4.37%. Electrochemical impedance spectroscopy (EIS) revealed that the decrease in chemical capacitance ( ${\textit C}_{\mu }\text {)}$ and the increase in recombination resistance ( ${\textit R}_{\text {rec}}\text {)}$ of QDSCs based on 0.45 at% Sm@0.1 at% Eu-doped TiO2 photoanodes facilitate charge extraction and suppress charge recombination at the TiO2/electrolyte (EL) interface compared to undoped one.
✓ 已验证
产品关联
DOI
高影响因子
SmartMat
·
2026
·Vol. 7
·期 1
·e70064
·
IF 14.3
Shuai Zhang,Kezhou Chen,Lin Xi,QingXin Luan,Jiayi Liu,Tiegen Liu,Lili Hou
Optically switchable functions are highly interesting for AI applications in smart displays, memory encryption, and neuromorphic computing. The use of molecular photoswitches to precisely modulate functionalities at the nanoscale, such as photoluminescence (PL), is essential for developing photoswitchable nanomaterials. However, it is challenging to achieve the universal regulation of full-color PL, particularly for the efficient optical modulation while maintaining both high PL quantum yield (PLQY) and effective photoswitchable states. Herein, we report a simple and efficient photoswitchable system achieved through the hybridization of quantum dots (QDs) and diarylethene (DAE) photoswitches. The PL intensity of the three primary colors (RGB) can be reversibly switched on and off using the same DAE upon exposure to specific light. Our design exhibits a maximum PLQY exceeding 90% in the on state while maintaining a PL on/off ratio approaching 100, which represents one of the current highest values. The excellent performance relies on the synergistic energy transfer mechanism of the Förster resonance energy transfer and triplet energy transfer. Our photoswitchable materials enable the straightforward preparation of RGB QDs@DAE films for applications in reversible patterned display and information encryption. The patterns and information can be erased and rewritten multiple times, offering flexible and reusable smart materials toward data storage, advanced display, and anti-counterfeiting technologies.
✓ 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）