JOURNAL OF LUMINESCENCE
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2026
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IF 3.8
Shuya Ning,Chi Zhang,Naming Zhang,Jin Huang,Kunping Guo,Tao Lei,Fanghui Zhang
Development of efficient fluorescence resonance energy transfer (FRET) is essential for application in optoelectronic and sensing technologies. In this work, we synthesized silica-coated silver nanoparticles (Ag@SiO 2 core-shell NPs) with different shell thicknesses and investigated their effect on a FRET system composed of CsPbBr 3 nanocrystals (NCs) and red dye 4-(Dicyanomethylene)-2-tert-butyl-6-[1,1,7,7-tetramethyljulolidin-4-yl-vinyl]-4H-pyran (DCJTB). Compared to the nanoparticle-free system, doping the CsPbBr 3 : DCJTB system with Ag@SiO 2 core-shell NPs of optimal shell thickness enhanced the fluorescence emission intensity to 3.5 times that of the nanoparticle-free FRET system and improved the FRET efficiency from 28% to 75%. Moreover, the Ag@SiO 2 NPs with the optimal shell thickness can more effectively enhance FRET efficiency than the bare Ag NPs. It is attributed to the fact that the Ag@SiO 2 core-shell NPs can simultaneously avoid quenching effect and effectively enhance the FRET efficiency through the plasmonic properties. This study provides an effective approach for designing highly efficient FRET system and offers a pathway for further enhancing the performance of optoelectronic devices.
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高影响因子
Desalination and Water Treatment
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2024
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IF 1
Xu Zuo,Shiyang Zou,Junrong Wu,Bingquan Ding,Aijun Jiang
Herein, core–shell Ag@SiO 2 /TiO 2 nanocomposites were synthesized and applied to activate peroxydisulfate (PDS) for wastewater purification. The Ag core and Ag-doped TiO 2 shell were obtained by stober method and calcination method. The dispersion degree and size of Ag in TiO 2 would influence the oxygen vacancy. Ag enhanced the visible absorption of TiO 2 and activated PDS. Improved degradation performance was attributed to enhanced PDS activation by photogenerated e − , which separated h + and thus promoted methyl orange(MO) degradation. Reactive oxidative species were verified under dark and light conditions via quenching experiments and electron paramagnetic resonance tests, demonstrating SO 4 •– , h + , O 2 •– , and 1 O 2 were formed in light,whereasSO 4 •– , •OH, O 2 •– , and 1 O 2 were responsible for MO degradation under dark conditions. The Ag@SiO 2 /TiO 2 /PDS/light system showed selectivity for removal of cationic dyes (e.g., methylene blue and malachite green) through adsorption and photocatalysis, whereas anionic dyes (e.g., MO) were degraded by photocatalysis alone. Besides, we found excess adsorption of micropollutant onto catalyst may be adverse to the activation of PDS. Therefore, the adsorption of oxidant (such as PDS) onto the catalyst surface would be beneficial for catalytic activation and micropollutant degradation, especially onto active sites. This work aims to provide a new avenue for core-shell structure catalyst synthesis in wastewater purification.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Min Chen,Lixue Xu,YanMin Wang
Metacomposites that have tunable negative permittivity show broad application potential in the domain of electromagnetics. In this study, the impregnation method was employed to successfully synthesize and impregnate silver (Ag) and silica-coated Ag (Ag@SiO₂) nanoparticles into a carbon cloth (CC) matrix. The content ratio of Ag and Ag@SiO₂ was regulated to adjust the negative permittivity of the composites. The results showed that a conductive network gradually formed in the composites and plasma oscillations occurred with the increase of Ag content, which thereby increased alternating current (AC) conductivity and the absolute values of negative permittivity. After Ag@SiO 2 nanoparticles were added, however, the conductive network was disrupted, which reduced electrical conductivity. Ag@SiO₂ regulated the frequency dispersion behavior of negative permittivity through Lorentz resonance. Thus, negative permittivity and frequency responses were successfully adjusted via the adjustment of the ratio between the inductive (Ag) and the capacitive (Ag@SiO₂) components in the composites. The findings offer a novel approach for designing lightweight metacomposites with precisely adjustable negative permittivity and frequency response characteristics.
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高影响因子
European Journal of Wood and Wood Products
·
2026
·Vol. 84
·期 2
·48
·
IF 2.7
Qi Feicui,Huang Quanfei,Huang Yanhui,Sun Xiaoting,Liu Zhi,Zhang Zongling,Liu Liyan,Yan Xueying,Tian Jun,Huang Luyi
Bamboo is a naturally-optimized composite material, but it is prone to deformation, cracking, mildew, and decay. The application of coatings with both mildew and decay resistance can provide long-term protection for bamboo, but bamboo lacks transverse cells and contains few fiber cell cavities and pits, leading to poor coating adhesion. This study subjected Phyllostachys edulis ( P. edulis ) and Neosinocalamus affinis ( N. affinis ) substrates to hygrothermal pretreatment to enhance the adhesion of coatings applied to them. A novel nano-Ag/SiO 2 -modified water-based coating with excellent dispersibility and thermal stability was applied to the surface of the pretreated bamboo strip substrates. The adhesion of the coating reached the highest level (Grade 0, no coating detachment), and its initial and maximum peel forces increased by 53.8% and 41.1% after hygrothermal pretreatment, respectively. Upon increasing the nano-Ag/SiO₂ content, the thickness, adhesion, hardness, scratch resistance, resistance to heating-cooling cycles, and mildew/decay resistance of the water-based coating improved. After the mildew resistance tests, the infection level of the samples decreased from Grade 3 (1/2–3/4 of the surface) to Grade 0 (No visible hyphae), while the discoloration level decreased from Grade 4 (severe surface and internal discoloration) to Grade 1 (minor surface discoloration) after soil burial tests. The weight loss rate, gloss reduction, and color difference of the surface also decreased after both tests. The results showed that the water-based coating modified with 2 wt% nano-Ag/SiO 2 exhibited the best dispersion uniformity, abrasion resistance, and minimal color difference, providing the best decorative and protective performance for the bamboo. The coating extended the service life of bamboo and enhanced its applicability in high-humidity indoor environments and harsh outdoor conditions.
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高影响因子
Nanocomposites
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2019
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IF 0
Lian Xiong,Shaodi Zheng,Zewang Xu,Zhengying Liu,Wei Yang,Mingbo Yang
In the present work, micropores and a low filler content of Ag@SiO2 nanoparticles (NPs) are synchronously introduced into polydimethylsiloxane (PDMS) film to obtain porous dielectric elastomeric composites. The morphology and dielectric and mechanical properties of the composites are investigated. The resulting composites possess high dielectric permittivity, low dielectric loss and low Young’s modulus, which is beneficial to the requirements of a dielectric elastomer actuator. This study provides an effective method to prepare high-performance PDMS-based dielectric porous dielectric elastomeric composites filled with low filler contents of Ag@SiO2 NPs.
研究领域:
材料科学
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聚合物复合材料
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介电材料
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智能驱动器
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纳米复合材料
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INORGANIC CHEMISTRY
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2023
·
IF 4.6
Weihao Zhao,Jinxin Fan,Yuan Tian,Cheng Wang
Lithium metal batteries have become one of the most promising rechargeable batteries due to the ultrahigh theoretical specific capacity of the Li metal anode. However, the Li dendrite growth and volume change of the Li metal anode during repeated Li plating–stripping cycles restrict the practical viability. Herein, a unique lithiophilic gradient structure of uniformly incorporating Ag nanoparticles into a three-dimensional (3D) nanofiber framework with amorphous SiO2 and TiO2 hybrids was prepared by an electrospinning process and used as a multifunctional interlayer between the pristine separator and Li metal foil. The 3D framework not only possesses excellent flexibility but also alleviates volume changes, which can withstand massive Li loading and promote uniform Li+ distribution. In addition, the 3D lithiophilic gradient structure allows for regulable Li+ flux and suppresses Li dendrite growth. Impressively, the Li||Li symmetric batteries with Ag@SiO2–TiO2 interlayers exhibit a prolonged lifespan of 1500 h at 0.5 mA cm–2 for 0.5 mAh cm–2. The full cells coupled with the Ag@SiO2–TiO2 interlayer show a capacity retention rate of 94.6% after 1000 cycles and a high rate capability. This work provides promising guidance for the design of a gradient-distributed lithiophilic structure toward an ultrastable Li metal anode.
研究领域:
材料科学
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能源存储
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Qiang Wang,Meizhen Zhang,Siru Chen,Qian Yu,Rui Wang,Jiaqi Guo,Xianming Kong
The core–shell structured Ag@SiO 2 nanomaterial integrated with surface-enhanced Raman scattering (SERS) spectroscopy promises a critical application in anti-counterfeiting. Security labels have been fabricated based on Ag@SiO 2 embedded with Raman reporters. The Ag@SiO 2 nanomaterial shows good stability and excellent anti-interference property for anti-counterfeiting. Multiple kinds of Raman probe molecules have been anchored in the Ag@SiO 2 labels to provide specific and abundant encoding information. The flexible encoding security information could be controlled conveniently by adjusting probe molecules, which not only enrich the SERS information but also improve the level of anti-counterfeiting. Furthermore, the Ag@SiO 2 shown excellent stability in organic solvent, and successfully used in ink for the anti-counterfeiting application.
研究领域:
材料科学
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光学
·
防伪技术
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DOI
PubMed
高影响因子
TALANTA
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2019
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IF 4.916
Tian Jin,Yue Zhang,Yilei Li,Wenjie Jing,Yunchao Li,Louzhen Fan,Xiaohong Li
Due to severely overlapping emission and or/ excitation spectra of polycyclic aromatic hydrocarbons (PAHs), the specifically recognizing PAHs by the fluorescent technique is still a challenge. Here, synthesized Ag@SiO 2 nanoparticles with 40 ± 4 nm Ag core and 7 ± 1 nm SiO 2 shell performing as a nanoprobe could selectively recognize 2-aminoanthracene (2-AA) via metal-enhanced fluorescence (MEF) within 2 min. The sensing mechanism was based on the facts: (1) there was a perfect spectral overlap between the local surface plasmon resonance (LSPR) peak of Ag@SiO 2 and the absorptive peak of 2-AA, and (2) 2-AA could interact with Ag@SiO 2 nanoparticles through hydrogen bonds between –NH 2 in 2-AA and –OH in SiO 2 shell. As a result, with Ag@SiO 2 nanoparticles as a nanoprobe, a fluorescent assay for detecting 2-AA was developed with a linear range from 1 nM to 800 nM, which exhibited an excellent selectivity over possible PAHs, dyes and metal ions . The detection limit was 1 nM. Finally, the developed assay was applied to analyse 2-AA in industrial wastewater samples, which were highly consistent with that of high performance liquid chromatography (HPLC). This study presents a feasible assay for detecting 2-AA for environmental monitoring and toxic evaluating.
研究领域:
环境科学
·
分析化学
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2022
·
IF 8.008
Jun Li,Yao-Yao Fan,Jie Wen,Jing Zhang,Zhi-Qi Zhang
The HIV-Ι trans-activation responsive (TAR) RNA–trans-activator of transcription (Tat) protein complex is crucial for the efficient transcription of the integrated human immunodeficiency virus-I genome and is an established therapeutic target for AIDS diagnosis and treatment. Developing a sensitive strategy for the TAR RNA-binding ligand assay could provide antiviral leads with a radically new mechanism for the treatment of AIDS. Herein, a new TAR RNA-binding ligand assay platform was established using a signal amplification strategy that combines aggregation-induced emission (AIE) with a metal-enhanced fluorescence (MEF) concept. The tetraphenylethylene (TPE) derivative was labeled on the Tat peptide as a fluorescent molecule, while the TAR RNA was immobilized on the surface of the Fe3O4@Au@Ag@SiO2 nanoparticles (NPs) to specifically bind the TPE-Tat peptide. The TPE-Tat peptide was weakly emissive itself while emitting strongly in the NP–TAR–TPE-Tat complex by the AIE and MEF signal amplification effect. It was confirmed by known Tat peptide competitors that this system could be applied to the screening and detection of TAR RNA-binding ligands because they could replace the TPE-Tat peptide from the complex and make the system fluorescence decrease. When this system was adopted to test four candidate ligands, it was found that bisantrene had a favorable TAR RNA-binding ability. The proposed AIE–MEF strategy not only provides a sensitive and reliable method for the TAR RNA-binding ligand assay but also can avoid the influence of ligands on fluorescent detection in the conventional displacement assay.
研究领域:
病毒学
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分子生物学
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生物医学工程
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化学生物学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Tong Feng,Kaicha Chen,Jiamiao Zhong,Yaxin Cheng,Hongli Zhao,Minbo Lan
Arsenic(III) is a highly toxic pollutant in the environment, and the development of nanomaterials with high electrochemical activity for As(III) detection is a research focus at present. Herein, an electrochemical sensing platform based on polyaniline nanofibers embedded with Ag@SiO 2 nanoparticles (Ag@SiO 2 /PANI NFs) was successfully constructed for trace As(III) determination. Owing to an in-situ chemical oxidation polymerization strategy, the polyaniline nanofibers loaded with Ag@SiO 2 core-shell nanoparticles blossomed into the dendritic three-dimensional network. The unique structure with a huge specific surface area greatly enhanced the adsorption efficiency of As(III). Combined with the outstanding conductivity of polyaniline and the electrocatalytic ability of uniformly dispersed AgNPs, the stripping current signal of As(III) was further amplified. Based on the optimized conditions, the sensitivity of 0.83 μA μg −1 L was obtained in the linear range of 0.1 ~ 100 μg L −1 with a low detection limit of 0.013 μg L −1 . And the selectivity, reproducibility, and long-term stability of this sensor were excellent. Additionally, satisfactory results were achieved by the recovery experiment of real samples, and the accuracy of this method was verified by comparison with ICP-MS. The above results demonstrated the promising application of the as-fabricated sensor in As(III) detection.
研究领域:
材料科学
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环境科学
·
分析化学
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高影响因子
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