JOURNAL OF APPLIED PHYSICS
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2022
·Vol. 132
·期 3
·
IF 2.877
Guo Heng,Zhu Yizhi,Chen Jinping,Xie Xiaoyu,Jiang Qingsong,Xu Chunxiang,Cui Qiannan,Shi Zengliang
As an effective means to endow lead halide perovskite nanocrystals (NCs) with new properties, ion doping has been widely applied. Transition metal Mn-doped CsPbCl 3 is of particular interest, as the Mn doping introduces new emission bands, improves photoluminescence quantum yield (PLQY), and even enhances stability. However, it is still insufficient to catch insight of the energy transfer process and luminescence characteristics of these high defect tolerance NCs doped with Mn ion. Here, we systematically studied the energy transfer from exciton to Mn 2+ ions in Mn-doped CsPbCl 3 NCs by variable temperature steady-state fluorescence spectra and time-resolved spectra. The abnormal attenuation behavior of the exciton and Mn 2+ with the change of temperature was observed, from which we predict the existence of shallow traps near the conduction band and these shallow traps will affect the luminescence properties by influencing the energy transfer process. We show a simple physical model invoking only shallow trap states that uniquely describe the temperature-dependent energy transfer between the exciton and the Mn 2+ ion. The thermometric performance (30–290 K) was studied in terms of relative thermal sensitivity, in which the calculated relative sensitivity range is ∼0.12%–1% K −1 .
研究领域:
材料科学
·
光学
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DOI
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Daomin Min,Yanan Duan,Ziwei Gao,Yutao Hao,Xiaofan Song,Shihang Wang,Qingzhou Wu,Wenfeng Liu
Polymer nanocomposites (PNCs) are important energy storage dielectrics for capacitors. However, the lack of quantitative research on the properties of mesoscopic scale conductivity, traps, and Young's modulus in interfacial regions between polyetherimide and nanofillers results in an unclear understanding of the relation between the structure and properties. Polyetherimide/Al 2 O 3 PNCs are prepared by in-situ polymerization, and the dielectric, thermal, and mechanical properties are measured. The experiments show that the film doped with 3 wt% nanofillers has the highest resistivity, Young's modulus, breakdown strength , and energy storage density. Then, the mesoscale distributions of the conductivity and Young's modulus in interfacial regions are solved as the inversion problem of electric and stress fields, and the macroscopic conductivity and Young's modulus of PNCs are obtained by high-throughput simulations. The conductivity, trap, and Young's modulus distributions are obtained by comparing the simulation and experimental results. It shows that the molecular chains in interfacial regions are bounded by nanofillers to form a tighter aggregated structure, hindering the molecular motion. Accordingly, the charge transport between molecular chains slows down, the trap energy increases and the conductivity decreases. The tighter aggregated structure makes PNCs have higher breakdown strength, energy storage density, and lower energy loss.
研究领域:
材料科学
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电气工程
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机械工程
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高分子科学
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 7
·5087-5092
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IF 1.556
Zhao Yanmeng,Zhang Zhongping,Sun Dapeng,Li Guangqiang,Lan Xinzheng,Jiang Yang
We explored a facile routine to synthesize morphology-controlled Ag2S–CdS heterostructures. The heterostructures were achieved by a two-step method where CdS nanorods were prepared in the first step, acting as the substrates inducing successive cation exchange reaction
between Cd2+ and Ag+ ion. The nucleation sites of Ag2S can be readily controlled by varying the feed ratios of Ag+ to Cd2+ ion, thus leading to formation of heterostructures with different morphology where Ag2S particles grow
on the tips of the CdS rods, or at multiple locations across the nanorods. HRTEM analysis showed that Ag2S particles were grown on the varied sites of CdS rods with a coherent, quasi-epitaxial interface having different degrees of lattice mismatch. Photoluminescence results showed
that, compared to bare CdS nanorods, enhanced trap emissions were observed after the growth of Ag2S particles on the rods, which can be attributed to the strained interfaces instead of impurities doping.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Kaizheng Gao,Feihua Liu,Fu Lv,Nuomei Li,Man Liu,Ziheng Ye,Minghan Yu,Rui Yin,Chen Zhang,Yuhui Huang,Weiwei Zhao
The rapid development of advanced electronics, hybrid vehicles, etc. has imposed heightened requirements on the performance of polymer dielectrics. However, the energy density (Ue) of polymer dielectrics significantly decreases due to increased leakage current and dielectric loss under high temperatures and high electric fields. Herein, γ phase Ga2O3 (γ-Ga2O3) nanoplates with wide-bandgap (∼4.7 eV) and moderate dielectric constant (∼10.0) were synthesized and incorporated into a polyimide (PI) matrix. The γ-Ga2O3 nanoplates impede charge injection and transport within the nanocomposites under dual trap mechanisms, namely, deep traps introduced by band alignment at the interface between γ-Ga2O3 and PI and the defective spinel structure of γ-Ga2O3 with lattice defects that function as additional charge carrier traps. Additionally, γ-Ga2O3 nanoplates also serve as electron scattering centers and act as electrical barriers; thus, the leakage current and conduction loss get reduced. Consequently, the nanocomposite with 1 wt % γ-Ga2O3 exhibits a discharge energy density of 4.591 J cm–3 and a breakdown strength (Eb) of 501.49 MV m–1 at 150 °C, which are significantly higher than those of commercial biaxially oriented polypropylene (BOPP) at 25 °C. Moreover, the nanocomposite exhibits remarkable cyclic stability over 120,000 cycles with only 1.2% fluctuation. This work provides a semiconductor filler strategy in the design of polymer nanocomposites for capacitive energy storage at high-temperature and high electric field environments.
研究领域:
材料科学
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介电材料
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高分子纳米复合材料
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能源存储
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电子器件
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DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
J. Du,S. Lyu,K. Jiang,D. Huang,J. Li,R. Van Deun,D. Poelman,H. Lin
Persistent luminescent materials containing deep-level traps have attracted extensive research interest in the field of optical information storage due to their unique features of long-lasting emission, energy storage, and controllable photon release upon external stimulations. However, the lack of suitable luminescent materials with deep-level traps is still the bottleneck of such an optical storage application. Herein, we report a series of persistent luminescent materials with reddish-orange emissions and controllable photon release upon thermal stimulation. Through substitution of Sn by Si, more and deeper trap levels are achieved in Sr 2 SnO 4 :Sm 3+ ,Si 4+ phosphors. Moreover, both ultraviolet light and high-energy X-ray irradiations can induce reddish-orange emitting persistent luminescence from the as-synthesized samples. Rewritable optical information storage and readout based on photon trapping and de-trapping processes are demonstrated. Optical information can be handily encoded using a commercially available 365 nm light-emitting diode, and decoded upon thermal stimulation. The Sr 2 SnO 4 :Sm 3+ ,Si 4+ phosphors as presented in this work show a great promise for rewritable optical data storage and information encryption.
研究领域:
材料科学
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光功能材料
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固态化学
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信息存储技术
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发光物理
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Shen Yao,Pang Kai,Zhao Weichen,Chen Liang,Zhao Jingkai,Ye Jiexu,Zhang Beini,Li Sujing,Li Wei,Xu Zhen,Meng Jing,Gao Xiang,Zhang Shihan
Direct air capture (DAC) is critical to achieve carbon neutrality, yet current technologies face significant barriers to widespread, cost-effective deployment. Amine-based electric swing adsorption (ESA) offers a promising low-energy, steam-free pathway, but its efficiency is fundamentally limited by an inherent 2:1 amine-to-CO 2 stoichiometric penalty. Here, we overcome this bottleneck by engineering a point defect-mediated proton trapping network into ESA sorbents, enabling a 1:1 amine-CO 2 stoichiometry. Our engineered sorbent achieves a CO 2 uptake of 6.57 mmol g −1 from 400 ppm CO 2 , a 28.8% improvement over the state-of-the-art sorbents. Regeneration is achieved with a low energy input of 3.4 GJ t −1 and exhibits a CO 2 release rate 48% faster than conventional thermal methods. N 5- d GA remains stable under 0-80% relative humidity fluctuations and at a gas velocity of 1 m s −1 . Techno-economic analysis projects DAC operating costs of $48-62 t −1 using renewable electricity, up to 78% lower than temperature swing adsorption DAC and below the $100 t −1 CO 2 target. This work presents a sorbent design and ESA process, establishing a scientifically rigorous and economically viable pathway towards gigaton-scale DAC deployment.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ke Li,Lu-Ming Zhou,Yun-Xiao Zhang,Yuan-Xiang Zhou
Electrical failure of cross-linked polyethylene (XLPE) insulation originates from microdefects with strongly intensified local fields. Here we establish a dielectrophoresis–guided molecular targeting strategy that directs anthraquinone (AQ) toward these high-field regions. The field-gradient–driven migration of AQ leads to localized deep-trap formation, efficient carrier capture, and suppression of field distortion. At an optimal 1 wt % loading, AQ enhances the direct current breakdown strength of XLPE by 44%, reduces conductivity, and regulates trap states, while maintaining processability. These results reveal a coupled mechanism of field-driven molecular redistribution and trap-state regulation, providing new insight into the dynamic charge–field interactions that govern electrical reliability in polymer dielectrics, and establishing a generalizable mechanism for defect-level stabilization via dielectrophoretic targeting.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yanqi Zhu,Ziwen Fan,Yuan Xu,Yue Wang,Xiao Liu,Changhong Wang,Zheng Niu
Tetramethylsilane (TMS) plays the crucial role in high-quality silicon carbide films, semiconductors, and low dielectric materials. However, the production of high pure TMS needs to remove isopentane, a byproduct with a nearly boiling point from TMS, consuming a large amount of energy in traditional distillation processes. Herein, a series of ultramicroporous MOFs, [M 3 (HCOO) 6 ] (M = Co, Mg, Ni), featuring the synergy of nano-traps and molecular sieving effect, is synthesized to achieve efficient separation of TMS/isopentane. Co 3 (HCOO) 6 exhibits distinct adsorption preferences among these MOFs, showing high isopentane uptake (2.72 mmol·g −1 ) but limited TMS adsorption (0.33 mmol·g −1 ) at 308 K and 60 kPa. Remarkably, it achieves a high-purity TMS (>99.999 %) productivity of 0.348 kg·kg −1 , demonstrating both exceptional adsorption capacity and unprecedented TMS/isopentane selectivity. Co 3 (HCOO) 6 is further processed into pellets using polyether sulfone (PES) as a binder. Remarkably, Co 3 (HCOO) 6 @5%PES retains a high isopentane uptake of 2.59 mmol·g −1 , while maintaining a high-purity TMS (99.9993 %) productivity of 0.279 kg·kg −1 . The result demonstrates that the separation efficiencies remain comparable to powder, highlighting the promising prospects of composite adsorbents for practical applications
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Qian Xu,Wentao Yan,Wei Li,Yue Yuan,Kaiyuan Liu,Zibing Pan,Qianqian Guo,Long Jiao,Yanjun Hu
Supraparticles, the small aggregation entities of functional micro/nanoparticles, are crucial in materials science, chemistry, and nanotechnology owing to their unique properties and wide range of applications. Evaporation-driven self-assembly of colloidal droplets on surfaces has proven effective for supraparticle synthesis. However, challenges such as low production rates, adhesion risks, cross-contamination, and limited flexibility continue to hinder the widespread adoption of this method. To address these challenges, this study proposes an innovative strategy that uses the novel lotus-seed head and Nepenthes-inspired trap-array slippery surfaces (TASS). These surfaces feature a macroscopic trap array and a lubricant layer for high-throughput supraparticle synthesis. The lubricant traps provide a self-locating and stable lubrication effect, enabling the retreatment of addressable droplet array contact lines during evaporation, leading to the successful fabrication and collection of the supraparticle array. Additionally, the method demonstrates high synthesis flexibility, allowing for the creation of various supraparticle structures, morphologies, and porosities. As a proof of concept, core–shell magnet-actuated photocatalytic supraparticles were synthesized using TASS and showed enhanced contaminant degradation efficiency. This novel surface-template strategy provides a promising approach for large-scale, evaporation-driven supraparticle synthesis, with potential applications in catalysis, energy storage, and carbon capture.
研究领域:
材料科学
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纳米技术
·
化学工程
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DOI
PubMed
高影响因子
Matter
·
2025
·
IF 17.5
Zhehua Zhang,Linsen Yang,Tingyang Li,Qingrui Meng,Yuge Wu,Shengyang Zhou,Weiwen Xin,Xin Li,Qingchen Wang,Ye Yuan,Xiang-Yu Kong,Lei Jiang,Liping Wen
Efficient uranium extraction from seawater is essential for sustaining nuclear energy, yet this process requires adsorbents with high selectivity in complex environments. Nano-trap materials exhibit superior selectivity for uranium ions; however, their capacity is often limited by substantial mass transfer resistance, which impedes the diffusion of ions to active binding sites. Inspired by the hierarchical porous structure of Liquidambar formosana fruit, known for promoting rapid mass transfer, this study constructs MOF-based nano-trap adsorbents with biomimetic hierarchical porosity using a soft-template approach. The integration of macropores within the MOF framework enhances uranyl ion transport and maximizes the accessibility of functional binding sites, thereby significantly improving adsorption efficiency. Experimental results demonstrate a 213% increase in adsorption capacity in aqueous solutions and a 150% improvement in natural seawater. This work presents a strategy to address mass transfer limitations in functionalized MOFs, offering a promising approach for developing high-selectivity adsorbents for seawater uranium extraction.
研究领域:
材料科学
·
环境科学
·
海洋资源开发
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DOI
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 22
·37984-37993
·
IF 3.2
Linfeng Wang,Xiaoyue Huang,Tingting Zhang,Jinke Bai,Ting Zhao,Bing Xu,Qinghua Li,Xiao Jin,Xiao Jin,Yuxiao Wang,Xueru Zhang,Yinglin Song,Yinglin Song
InP quantum dots (QDs) have emerged as promising nanomaterials in various fields due to their exceptional optical properties. However, its wide emission linewidth limits further application. In this study, we synthesized high-quality InP/ZnSe/ZnS QDs by suppressing hole defects. The unreacted In precursors during nucleation easily enter ZnSe in the subsequent shelling process, forming a hole trapping center that adversely affects the photo-excitons radiative recombination. Our results demonstrate that the presence of In ions in ZnSe shell enhances exciton-phonon coupling, broadens the fluorescence emission spectrum, and weakens exciton binding energy. The optimized InP QDs exhibit a line width of 44 nm and 90% PLQY at 630 nm. Furthermore, our investigation into the interaction between shell hole defects and core exciton function provides valuable insights for designing and preparing another high-performance core-shell heterojunction QDs.
研究领域:
纳米技术
·
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
Journal of Advanced Dielectrics
·
2018
·
IF 0
Hua Fang,Gaojian Qiu,Xusheng Wang,Yanxia Li,Xi Yao
A series of Sr 1 . 9 6 Sn 1 − x Si x O 4 :0.04Sm 3 + ( x = 0 , 0.1, 0.15, 0.2, 0.3, 0.4) were synthesized from solid-state reaction. The mechanoluminescence (ML) performance of Sr 1 . 9 6 SnO 4 :0.04Sm 3 + was greatly enhanced by partial Si 4 + substitution for Sn 4 + , and the sample of Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + showed weaker afterglow and twice stronger ML intensity than that in Sr 1 . 9 6 SnO 4 :0.04Sm 3 + . The stress response of Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + ranged from 250 to 1200 N, and its linearity was greatly restored. Particularly, it was very sensitive in the minimal stress response range. These properties of no load threshold for stress sensing and weak afterglow make Sr 1 . 9 6 Sn 0 . 8 Si 0 . 2 O 4 :0.04Sm 3 + superior to other excellent ML materials. The introduction of Si 4 + caused lattice distortion and promoted defect formation in the system. The trap level energy greatly increased and the trap depth changed, which enhanced the trap ability and therefore improved effectively the ML properties.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
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