OPTICAL MATERIALS
·
2014
·
IF 2.075
Junhong Zhao,Jian Lin,Wenjun Zhang,Hengyong Wei,Ying Chen
A highly stable substrate used for surface-enhanced Raman scattering (SERS) was fabricated by combining two-step electric field-assisted diffusion (EFAD) with subsequent annealing. The samples were characterized by UV/Vis spectroscopy, X-ray diffraction analysis (XRD), X-ray photoelectron spectra (XPS), atomic force microscopy (AFM) and transmission electron microscopy (TEM). The SERS activity of these substrates was evaluated by using Rhodamine 6G (R6G) as the probe molecule. The results showed that the Raman signals were significantly enhanced in our substrates. The reverse EFAD process was applied to induce larger silver NPs or aggregates formed in the glass, leading to a stronger SERS signal. The enhancement factor about 10 6 and the detection limit of 10 −9 M for R6G were achieved. This method is also very simple and cost-effective and provides a novel pathway for the development of future SERS sensor chips.
✓ 已验证
DOI
高影响因子
ACS Nano
·
2026
·
IF 16
Yingde Xu,Yifan Wang,Hongwei Bi,Zhonghui Gao,Wence Xu,Hui Jiang,Zhenduo Cui,Yanqin Liang,Shengli Zhu,Yufeng Zheng,Shuilin Wu,Zhaoyang Li
The underlying mechanisms by which heterogeneous interfaces enhance piezoelectric catalytic effects under ultrasonic irradiation, along with their potential biomedical applications, remain poorly understood. In this study, a versatile Z-Scheme nanoplatform by encapsulating the BiO2-x/Ag3PO4 heterojunction within poly(lactic-co-glycolic acid) (PLGA) microspheres (BA@PLGA) was developed for ultrasound-activated deep-lung antibacterial therapy. The Z-scheme heterojunction synergistically integrates piezoelectric and built-in electric fields, achieving 2.2 and 4.7-fold enhancements in piezoelectric (d33) and electromechanical coupling (k) coefficients, respectively. Ultrasonic-induced dynamic modulation of the piezoelectric potential in BiO2-x/Ag3PO4 generated a “carrier-pumping” effect, which enhanced polarized charge migration efficiency and thereby markedly amplified reactive oxygen species (ROS) production. Consequently, with the assistance of trace Ag+, 99.87 ± 0.05% of methicillin-resistant Staphylococcus aureus (MRSA) were effectively eradicated within 15 min in vitro. Prokaryotic transcriptome analysis further revealed that the synergistic effect of ROS and trace Ag+ disrupted the cell envelope and interfered with the core metabolic pathways of MRSA. This ultrasound-activated platform, integrating piezocatalysis and trace Ag+, achieved over 99.9% bacterial clearance rapidly (1.6log superiority over gentamicin) and alleviated inflammation in a MRSA-induced pneumonia, demonstrating considerable potential for combating bacterial infections in deep-seated tissues.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE TEXTILE INSTITUTE
·
2023
·
IF 1.7
Jie Wu,Shuqiang Liu,Gaihong Wu,Man Zhang,Yifan Jing,Jingjing Li,Md Moinul Hossain Patowary,Romen Chakma,Cailiu Wang,Fu Li,Lu Jia,Yujing Zhang,Dongdong Lu
This paper presented the composite antibacterial agent of nano-silver (Ag) and tea polyphenol (TP) by bioreduction method. Then polylactic acid (PLA) nanofiber membranes with different antibacterial content were prepared by electrostatic spinning method. The morphologies, structural characteristics and properties of electrostatic spun fiber membranes were investigated by scanning electron microscope (SEM), infrared spectroscopy (FTIR), electronic single fiber strength machine and flat colony counting method. The results showed that Ag@TP was loaded with silver nanoparticles with uniform particle size distribution. When the content of Ag@TP of electrospun fiber was less than 2.0%, the diameter of electrostatic spinning fiber was uniformly distributed and had smooth surface. It could be seen from the FTIR spectrum that Ag@TP and PLA were well compounded through valence bonds. As the content of antibacterial agent increased, the elongation at break of the fiber membrane first decreased and then increased. While the breaking strength was found to first decrease, then increase and decrease again. The water contact angle of the fiber membrane was gradually decreased with the increase of the antibacterial agent content. When the amount of Ag@TP was added 2.0%, the relative antibacterial rate of the electrospun fiber membrane to E.coli and S.aureus was as high as 95%, indicating an excellent antibacterial effect.
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Zhuorong Fan,Xiaojing Xu,Jixian Luo,Zimeng Lei,Wenjuan Dong,Wenting Liang,Shengmei Song,Xiaojuan Gong
Background Red-emitting carbon dots (R-CDs), characterized by their long-wavelength fluorescence in the red spectral region, offer significant advantages as fluorescent probes due to their capacity to effectively mitigate light scattering and suppress autofluorescence interference from biological matrices. This inherent optical property positions them as one of the most promising candidates for high-contrast bioimaging and sensitive sensing applications. Herein, a novel type of highly luminescent R-CDs was synthesized via a tailored precursor design and doping strategy. Their potential as advanced fluorescent probes was systematically evaluated, focusing on their exceptional optical properties, photostability, and responsiveness to specific substances. Results The emitting of R-CDs exhibits strong pH sensitivity in the range of 1.5-4.0, enabling monitoring of extremely acidic environments. Additionally, R-CDs were employed as probes to develop a multi-mode sensing platform integrating ratiometric fluorescence, ratiometric colorimetry, and smartphone-based imaging for Ag + detection. Fluorescence mode: Ag + selectively quenches the red emission of R-CDs, while yellow emission of Cu-CDs remains stable. Quantification detection relies on the I 624 /I 550 ratio, with a linear range of 0–185.3 μM and LOD of 0.266 μM. Colorimetry mode: Ag + -induced aggregation of the R-CDs weakened the original absorption band and generates a new peak at 680 nm, enabling detection via the A 680 /A 610 ratio with a linear range of 0–208.0 μM and LOD of 0.398 μM. Moreover, the R-CDs solution undergoes a distinct color change under exposure to Ag + ; by leveraging smartphone-based color recognition, a portable visual sensing platform has been successfully constructed. Significance In this work, the synthesis of R-CDs provides a strategic reference for developing high-performance, multicolor-tunable, and function-oriented doped CDs. The multi-mode sensing platform achieves functional complementarity and data cross-validation, thereby improving the reliability, anti-interference capability and on-site applicability of detection. Analytical robustness is further enhanced by the ratiometric strategy's built-in reference signal, which effectively compensates for instrumental, environmental, and operational variables. This design strategy features universal principles and demonstrates strong potential across a wide range of applications.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2026
·Vol. 16
·期 16
·14123-14134
·
IF 6.1
Wanwan Liu,Huabin Li,Jingjing Xu,Shuangquan Wu,Zhidong Chen
In the field of self-powered sensing, the demand for materials with enhanced wearing comfort and superior flexibility has become increasingly prominent, driven by the rapid advancement of wearable electronics and intelligent monitoring technologies. Although piezoelectric ceramics exhibit exceptional piezoelectric performance, their inherent brittleness and poor deformability severely restrict their practical applicability in flexible self-powered sensors. In pursuit of addressing the requirement for improved wearing comfort while retaining efficient energy conversion capability, elastomer-based composite fibers have emerged as a promising class of materials and developed rapidly in recent years. Nevertheless, a critical challenge remains in achieving uniform dispersion of fillers within the polymer matrix and the fabrication of defect-free composite fibers under high filler loading, primarily due to the significant surface energy discrepancy between the fillers and the polymer matrix. In this work, a novel thermoplastic polyurethane (TPU) based composite piezoelectric fiber with strong organic–inorganic interfacial adhesion and uniform high-content filler dispersion was proposed, achieved by interfacial modification of PZT and in situ reduced Ag nanoparticles (AgNPs) into TPU via wet spinning for flexible wearable piezoelectric sensors. Notably, even at total inorganic filler loadings surpassing 80 wt%, the resultant composite fibers maintain outstanding mechanical properties, with breaking strength >10 MPa and elongation at break >200%. When optimized with 80 wt% PZT and 3 wt% Ag precursor, the composite fibers, after weaving into fabrics and corona polarization, exhibit ultrahigh piezoelectric output sensitivity of 133 ± 2.1 mV N−1 and ultrafast response time (≈20 ms). This work offers a scalable fabrication route for high-performance piezoelectric fibers, which is helpful for self-powered sensors with better performance and more comfortable use in human motion monitoring and recognition.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Yueling Chen,Shibin Zheng,Xingci Huang,Zhangtong Zhang,Guocheng Huang,Qiaoshan Chen,Ling Wu,Jinhong Bi
Covalent organic frameworks (COFs) have emerged as promising candidates for photocatalytic CO2 reduction. While the introduction of single metal atoms can enhance activity, most reported COF-single atoms catalysts adopt near-planar coordination environments that confine carrier migration largely within individual layers, imposing high interlayer transfer barriers and sluggish kinetics and consequently hindered overall performance. This work constructed a single-atom Ag-modified covalent organic framework (Ag-COF) by confining isolated Ag atoms within a spherical TD-COF scaffold, thereby wiring adjacent layers into efficient interlayer charge-transfer channels for gas-solid CO2 photoreduction. Under visible light and without sacrificial agents, Ag0.15-COF delivered a CO formation rate of 184.05 μmol·L-1 with near-unity CO selectivity, representing a tenfold improvement over pristine TD-COF. Structural and photoelectronic analyses identified the N-Ag-N bridging motifs that lowered the interlayer electron-transfer barrier, accelerated carrier separation/migration, and tuned the local electronic structure of active sites. In situ spectroscopy combined with thermodynamic calculations further revealed that the strengthened interlayer charge flow enhanced CO2 adsorption/activation and markedly reduced the barrier for forming the key *COOH intermediate. This study elucidates, at the atomic scale, how interlayer charge transfer governs the activity and selectivity, and provides a design blueprint for highly efficient single-atom-modified COF photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Jiqiu Zhang,Wei Liu,Wenkai Teng,He Li,Honghui Ou,Guidong Yang
A high-aspect-ratio Ag/Co 3 O 4 nanowire array catalyst is fabricated via in-situ growth and interfacial engineering, forming a tandem catalytic system with synergistic Ag and Co active sites. • Ag loading promotes interface electron transfer and increases the proportion of Co 3+ to optimize the reaction pathway and suppress hydrogen evolution reaction. • The tailored interface provides abundant active sites and fast kinetics, leading to a record 94.2% FE at 800 mA·cm -2 . • Maintains >90% FE at 1 A·cm -2 , showcasing unmatched stability for scalable application. Electrocatalytic conversion of nitrate (NO 3 - ) to ammonia (NH 3 ) offers an beneficial route for green NH 3 synthesis, yet challenges such as complex reaction pathways and uncoordinated adsorption and conversion of reactive species hinder the enhancement of reaction kinetics. In this study, a high-aspect-ratio Ag/Co 3 O 4 nanowire array catalyst was successfully fabricated on cobalt foam via an in-situ growth combined with an interfacial engineering strategy, constructing a tandem catalytic system with synergistic Ag and Co active sites. The results demonstrate that Ag loading promotes interface electron transfer and increases proportion of Co 3+ , which can promote yield improvement. Electrochemical tests show that in an H-cell, Ag/Co 3 O 4 achieves a Faradaic efficiency (FE) of 91.4% and NH 3 rate of 70.2 mg·h -1 ·cm -2 at −0.4 V vs . RHE. In a membrane electrode assembly (MEA) system, Ag/Co 3 O 4 exhibits a high FE of 94.2% at large-scale applicable current density of 800 mA·cm -2 and maintains over 90% FE even at 1000 mA·cm -2 , along with excellent stability. This work elucidates the core mechanism involving tandem catalysis and the synergistic enhancement via interfacial electron transfer regulating Co 3+ active center, providing a novel strategy for designing high-performance and robust catalysts for the electrochemical nitrate reduction reaction (NO 3 RR) and advancing this technology toward industrial application. Download: Download high-res image (518KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2026
·
IF 2.9
Yuxia Li,Tingting Ge,Zehao Jing,Yanxia Zheng,Yuchao Li,Ming Wang,Haofei Huang,Cuncun Zuo
Tricyclodecanemonoaldehyde (TCDMA) and tricyclodecanedialdehyde (TCDDA) are key intermediates in fine chemicals and are typically synthesized via hydroformylation of dicyclopentadiene (DCPD). However, developing cost-effective and highly active catalysts with high selectivity remains a significant challenge. A series of M-doped CoO catalysts (M = Ag, Cu, Fe, Ni) are synthesized via a co-precipitation method for DCPD hydroformylation, and Ag is identified as the optimal dopant for synergistic regulation of CoO catalytic performance. The structure–activity relationships of the catalysts are systematically elucidated using a combination of characterization techniques, including XRD, SEM/TEM, in situ FTIR, H2-TPD, H2-TPR, and CO-TPR, and the reaction conditions (temperature, catalyst dosage, pressure, and time) are systematically optimized. Under the optimal reaction conditions (150 °C, 7 MPa, 24 h), the 10% Ag/CoO catalyst achieves a DCPD conversion of 72%, a total aldehyde selectivity of 90%, and a combined yield of TCDMA + TCDDA of over 65%. The introduction of Ag nanoparticles not only modulates the surface electronic structure of CoO to promote H2 adsorption and activation but also suppresses the excessive reduction and aggregation of cobalt active species during the reaction, thereby enhancing both catalytic activity and structural stability. Based on experimental characterization and performance evaluation, a dynamic catalytic cycle mechanism for DCPD hydroformylation on the Ag/CoO surface is proposed, clarifying the synergistic catalytic effects of Ag and CoO active sites. Compared with traditional precious metal catalysts, the Ag/CoO bimetallic catalyst features low cost, simple preparation, and excellent catalytic performance and exhibits significant potential for industrial application in the green synthesis of TCDMA and TCDDA.
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Yunhang Liu,Hao Yi,Huajun Cao,Jun Luo
In this study, an aerosol-jet-printed silver micropillar array was introduced onto the surface of a screen-printed carbon electrode (SPCE) and further coated with a poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) functional film, yielding a three-dimensional hierarchical electrode for high-performance electrochemical detection of niclosamide (NA). The silver micropillar arrays form a three-dimensional microelectrode network on the working electrode surface, where the pillar tops and sidewalls markedly increase the electrochemically active area and facilitate mass transport toward the electrode interface, thereby enhancing analyte flux and amplifying the Faradaic response. In addition, PEDOT:PSS as a mixed ionic-electronic conductor, establishes a continuous and stable reaction interface on the silver-pillar scaffold, which not only improves interfacial wettability and charge/ion transport but also promotes interfacial enrichment of NA via its functionalized polymer network. Benefiting from the synergistic effects of three-dimensional structural amplification and conductive-polymer-mediated interfacial regulation, the fabricated Ag@PEDOT:PSS/SPCE sensor exhibits a good linear response over 0.01–15 μM with a limit of detection as low as 1.73 nM. Meanwhile, the sensor demonstrates excellent repeatability, reproducibility, and anti-interference performance, and it was successfully applied to the quantitative determination of NA in tap water and oolong tea samples with satisfactory recoveries and accuracy, indicating strong potential for practical applications.
✓ 已验证
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Wanling Mao,Siyong Wang,Li Zhang,Yujia Luo,Yuyao Feng,Yunhai Xiong,Yixuan He,Yuhui Dong,Yousheng Zou,Haibo Zeng
Low-toxicity quantum dots (QDs) based on group I-III-VI elements have attracted significant interest due to their color-tunability for wide-gamut displays. Nevertheless, the width of the blue-emitting peak remains considerably broader than those of the green and red counterparts, resulting in degraded color purity, restricted gamut coverage, and diminished energy efficiency in blue-emitting devices. Here, we report spectroscopically pure blue QDs (λ = 465 nm) with an ultranarrow FWHM of 36 nm, achieving excellent color purity for blue-emitting I-III-VI QDs. Employing a two-step hot-injection method with precise thickness control, this approach enables epitaxial growth of an atomically thin 0.35 nm thick AgGaS 2 (AGS) shell on Ag-In-Zn-Ga-S cores. Using in situ HRTEM on systematically synthesized AIZGS@AGS architectures, we directly captured the controlled epitaxial growth of this shell, revealing a clean core–shell interface. The high-crystallinity AGS shell passivates surface defects, narrowing the PL spectrum from 103 to 36 nm. Moreover, systematic In:Zn ratio tuning further affords AIZGS@AGS QDs that exhibit narrow linewidths and continuous spectral coverage across the blue region (465–509 nm). Our study provides an effective approach for high-quality I-III-VI blue QDs, demonstrating significant potential for advanced display applications.
✓ 已验证
产品关联
DOI
高影响因子
Micro and Nanostructures
·
2026
·
IF 3.1
Yuan Yuan,Min Zang,Fanxia Kong,Sen Yang,Xiaoyan Yang,Limei Li
PS@Ag@ZIF-8 sensor is constructed via room-temperature in-situ growth on monolayer colloidal crystals. • Introduced Ag nanoparticles greatly improve the sensor's optical features and structural color saturation. • The sensor selectively detects acetonitrile and alcohols by visible color change and reflection peak shift. • Fast response (<3 s), good recyclability for acetonitrile and high stability are achieved. • The design inspires low-cost portable gas sensors for environmental monitoring. In this work, we fabricated a high-performance optical sensor PS@Ag@ZIF-8 by sequentially depositing silver nanoparticles (NPs) and MOF thin films on the monolayer colloidal crystals surface via an in-situ growth method at room temperature. The rational introduction of silver NPs into the sensor structure remarkably improves its optical properties and structural color saturation. This sensor possesses excellent selective detection capability toward acetonitrile and alcohols. Moreover, the type and concentration of volatile organic pollutants (VOCs) vapors can be visually analyzed according to the shift of reflection peaks and distinct color differences in optical images. Meanwhile, it delivers an ultrafast response (<3 s) along with outstanding repeatability and recyclability. More importantly, it possesses a wide dynamic detection range, great linearity and exhibits excellent stability during operation. It is anticipated that this sensor provides a valuable reference for the development of low-cost, real-time and portable gas sensors for environmental monitoring. Download: Download high-res image (314KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Nano Select
·
2021
·Vol. 2
·期 11
·2135-2147
·
IF 0
Puhong Wen,Xiaowen Jiang,Qian He,Dengwei Hu,Lijun Ren,Weixing Zhao
The tetragonal phase Nb 2 O 5 (T-Nb 2 O 5 ) nanobelts with preferentially exposed the (010) facet have been successfully prepared for the first time by insitu topological reaction using the KNb 3 O 8 nanobelts as the precursor. Meanwhile, the transformation mechanism of the crystal structure and morphology from the layered KNb 3 O 8 nanobelt to the T-Nb 2 O 5 nanobelt was revealed in detail by using XRD, FE-SEM, TEM, HRTEM, SAED, UV-vis DRS, EDX, XPS, and Raman spectra. In addition, Ag deposited T-Nb 2 O 5 (Ag/T-Nb 2 O 5 ) nanobelts were prepared by photo-reduction reaction. The photoelectrochemical properties of the T-Nb 2 O 5 nanobelts and Ag/T-Nb 2 O 5 nanobelts as a photocatalyst were evaluated by splitting water under simulated sunlight. The results show that the photocurrent density generated by the prepared Ag/T-Nb 2 O 5 sample is 48.1 µA∙cm −2 , which is 2.3 times that of the T-Nb 2 O 5 sample, and the prepared tetragonal phase T-Nb 2 O 5 nanobelts produce a photocurrent value 1.5 times that of the contrast orthogonal phase O-Nb 2 O 5 nanosheets. It indicates that the (010) facet of the tetragonal phase Nb 2 O 5 is one of the highest photocatalytic active surfaces, and the visible light utilization efficiency of the T-Nb 2 O 5 nanobelt with Ag deposited on the surface has been significantly improved, which implies that it has potential applications in the field of photocatalysis.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体材料
·
表面科学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）