OPTICS EXPRESS
·
2024
·Vol. 32
·期 19
·33330-33343
·
IF 3.2
Zhibing Zhang,Zhiyong Yin,Shuguang Li,Linchuan Hu
To achieve more accurate analysis and detection of changes in liquid parameters, we propose a dual-parameter surface plasmon resonance (SPR) sensor that can measure refractive index (RI) and pH simultaneously. In this paper, we compare and analyze the transmission spectrum when the SPR effect is excited by the cladding mode of a photonic crystal fiber (PCF) and the core mode of the no-core fiber. The results show that the SPR effect excited using the cladding mode is stronger and the sensor has better loss peaks, which is more conducive to realizing the detection of the external environment. Therefore, the sensor uses PCF as the substrate and utilizes a cascade composite film structure, and the area where a silver film is deposited on the surface of the PCF is selected as the RI sensing area. Another part of the PCF, after the silver film is deposited, uses a high-sensitivity polyacrylic acid/chitosan self-assembled nanofilm as the pH-sensitive film. Experimental results show that the maximum sensitivity is 4122.44 nm/RIU and -57.82 nm/pH when the RI range is between 1.333 and 1.385 and the pH range is between 3.11 and 8.63, respectively. In addition, we experimentally verified that the sensor had good stability and repeatability. The design of the sensor provides new possibilities for real-time monitoring and precise control, helping to advance scientific research and the development of industry.
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Nanomaterials
·
2017
·Vol. 7
·期 9
·255
·
IF 3.553
Keke Yu,Xiaonan Sun,Liang Pan,Ting Liu,Anping Liu,Guo Chen,Yingzhou Huang
Hollow noble metal nanoparticles have excellent performance not only in surface catalysis but also in optics. In this work, the hollow Au–Ag alloy nanorices are fabricated by the galvanic replacement reaction. The dark-field spectrum points out that there is a big difference in the optical properties between the pure Ag nanorices and the hollow alloy nanorices that exhibit highly tunable localized surface plasmon resonances (LSPR) and that possess larger radiative damping, which is also indicated by the finite element method. Furthermore, the surface enhanced Raman scattering (SERS) and oxidation test indicate that hollow Au–Ag alloy nanorices show good anti-oxidation and have broad application prospects in surface-plasmon-related fields.Keywords:hollow nanorice;Au–Ag alloy;surface plasmon;surface enhanced Raman spectroscopy
研究领域:
纳米材料科学
·
光学
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RARE METAL MATERIALS AND ENGINEERING
·
2016
·Vol. 45
·期 7
·1664-1668
·
IF 0.236
Zhang Lingjie,Shen Tao,Shen Qianhong,Zhang Ji,Chen Lawson,Fan Xianping,Yang Hui
La 2 Sn 2 O 7 /SnO 2 composite powder was synthesized by chemical co-precipitation, and Ag-La 2 Sn 2 O 7 /SnO 2 electrical contact material was prepared by a powder metallurgy method. Anti-arc erosion properties, mass loss and Vickers hardness of the Ag-La 2 Sn 2 O 7 /SnO 2 composite were investigated, and its anti-arc erosion mechanism was discussed. Results show that the welding force of Ag-La 2 Sn 2 O 7 /SnO 2 composite is much better than that of Ag-SnO 2 , because the new phase La 2 Sn 2 O 7 can increase the viscosity of melt pool and improve wettability between silver and tin oxide to some extent. Meanwhile, Flatter arcing area and “beads-like” particles embedded scatteredly in the surface could decentralize arc energy via “pinning effect”, which decreases temperature rise and weakens the damage of surface structure, and better anti-welding property is obtained. Ag-La 2 Sn 2 O 7 /SnO 2 composite could be a leading candidate material for electrical contacts in the future.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Qian Che,Qian Zhao,Mingjun Hu,Ruzhan Qin,Guangcun Shan,Jun Yang
Attributed to excellent mechanical compatibility with the human body and thus favorable comfortability and good integrability, stretchable conductors and functional conductive patterns have been one of the most important components in wearable electronic devices. However, due to poor compatibility between stretchability and conductivity in most material system, the simple, fast, and low-cost fabrication of a stretchable conductor, especially conductive patterns, has been a problem to address in this field. In this paper, we propose a flexible and robust laser ablation method in combination with a two-step film transfer process for the fabrication of stretchable silver nanowire (AgNW)-based conductive patterns. In this method, three critical steps were involved for the optimized properties. First, a simple one-pot solvothermal method was developed for scalable synthesis of high-quality AgNWs; second, a reliable film transfer method was proposed to ensure complete replication of the properties of the AgNW film; third, a digital laser ablation technique was employed for the selective removal of the AgNW layer. Finally, stretchable transparent conductive electrodes, circuits, and functional patterns were fabricated. As a proof-of-concept demonstration, a wearable sensor and multipixel capacitive sensor arrays were prepared and showed good and reliable performance under various deformations, indicating the proposed method is available for the fabrication of various stretchable conductive patterns.
研究领域:
材料科学
·
电子工程
·
纳米技术
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Hengchao Zhang,Rushun Xue,Mengke Li,Zhihao Wang,Lei Cao,Shanglin Yang,Xuefeng Xiao,Xiaojuan Li,Xiaozhou Feng,Xinhui Fan,Lingmin Yu
In situ grown 3D CuO nanoarray structures with an ordered architecture have emerged as promising materials for advanced CO gas sensing platforms owing to their intimate anchoring on a substrate, large surface area, and abundant exposed active sites. However, 3D CuO nanoarrays encounter high working temperature, slow response time, and inferior response value, impeding their practical use for CO gas detection. Herein, an Ag electronic sensitization strategy is proposed by a facile in situ deposition method. By innovatively constructing Ag nanoparticle coatings on the surface of CuO nanocone arrays, a high response (Rg/Ra) of 4.95 to 100 ppm of CO was achieved at a lower temperature of 180 °C, which is more than three times higher than that of pure CuO (240 °C, Rg/Ra = 1.53). At the same time, Ag/CuO has a fast response time (tres) of 49 s and a recovery time (trec) of 56 s, which is at least 19 s shorter than pure CuO. In addition, the sensor has good CO selectivity for other gases such as CO, NH3, C3H6O, and CH4O, as well as long-term stability for 8 weeks (relative error 4.03%), which is better than pure CuO (relative error 6.45%). This excellent performance is mainly attributed to the synergistic effect of the unique nanoarray structure of Ag/CuO and the strong sensitization effect of Ag. Therefore, this study provides a novel and promising strategy for developing high-performance chemical sensors using interfacial engineering.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Kairui Kuang,Xue Jiang,Chenhui Qian,Zhenming He,Liumei Su,Jialong Zhao,Bingsuo Zou,Zhentao Du
In the present work, the exploration of photoelectrochemical (PEC) photodetectors (PDs) based on Ag-doped ZnO/MoS2 nanorod arrays is reported. Ag-ion doping optimizes the band structure of ZnO, reduces interface defect states, promotes the formation of an internal electric field, and significantly improves the photoelectric performance and stability of ZnO/MoS2 heterojunction PEC PDs. The PD exhibits excellent photodetection behavior, with a high photocurrent density (684.08 μA·cm–2), responsivity (2.207 mA W–1), and detectivity (11.3 × 108 Jones) under white-light illumination with an intensity of 310 mW cm–2 and a bias voltage of 0.6 V, which are approximately 2.7, 2.7, and 4.2 times higher than those of pure ZnO/MoS2, respectively. Furthermore, Ag doping significantly improves the self-powered photoelectric performance of the device, demonstrating excellent photoresponse characteristics under zero bias. This study reveals the mechanism by which Ag-ion doping improves the performance of ZnO/MoS2 photodetectors, providing fundamental support for the development of high-performance photoelectrochemical photodetectors.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Guo Li,Changxue Dong,Genshuai Sun,Mingzhe Li,Xin Cao,Li Zhou,Tao Chen,Fan Yang
Doping is a simple method to modulate the electronic configuration of semiconductor photocatalysts. This study regulated the energy band structure of CdSe nanosheets by Ag doping, which reduced the energy bandwidth of CdSe nanosheets by increasing the carrier density, thereby improving the efficiency of the photocatalytic reduction of uranium by CdSe nanosheets. A 96% removal of U(VI) was achieved by 3% Ag-CdSe nanosheets, which was 1.9 and 1.2 times higher than that of pristine CdSe nanosheets (50%), and 1% Ag-CdSe nanosheets (81%), respectively. Additionally, at pH = 4.0 and a solid–liquid ratio of 0.25, the reduction of uranium by 3% Ag-CdSe nanosheets (765 mg/g) was 2.2 times higher than that of pristine CdSe nanosheets (345.6 mg/g). This study provides a new idea for other efficient photocatalysts designed for uranium reduction.
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CATALYSIS COMMUNICATIONS
·
2022
·
IF 3.51
Baohuai Zhao,Baofang Jin,Xiaodong Wu,Duan Weng,Rui Ran
A series of Sm-Mn oxides (SmMnO 3 , SmMn 2 O 5 and Sm 0.9 Ag 0.1 Mn 2 O 5 ) of perovskite-type and mullite crystal phases were synthesized for the catalytic oxidation of CO and C 3 H 8 . The Sm 0.9 Ag 0.1 Mn 2 O 5 composition showed the highest catalytic activity among the series of solids, especially for the CO oxidation to CO 2 with T 50 and T 90 values of 60 and 95 °C, respectively. The catalysts were characterized by powder XRD, Raman, BET, XPS, and H 2 -TPR. It was found that the catalytic performance of the solids was correlated well with their redox properties. Synergetic effects between Ag-related species and the mullite phase resulted in more active surface oxygen species and remarkably lowered the reduction temperature of the Sm 0.9 Ag 0.1 Mn 2 O 5 solid.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qian Liu,Guilai Wen,Donglin Zhao,Lisi Xie,Shengjun Sun,Longcheng Zhang,Yongsong Luo,Abdulmohsen Ali Alshehri,Mohamed S. Hamdy,Qingquan Kong,Xuping Sun
Electrochemical reduction of nitrite to ammonia can simultaneously achieve ammonia synthesis and N -contaminant removal under mild conditions, which has attracted widespread attention but still lacks efficient catalysts. In this work, Ag nanoarray using NiO nanosheets array on carbon cloth as support is reported as an efficient electrocatalyst to selectively reduce nitrite to ammonia. In 0.1 M NaOH with 0.1 M NO 2 – , such catalyst exhibits a maximum ammonia yield of 5,751 μg h −1 cm −2 (57,510 μg h −1 mg Ag -1 ) and high Faradaic efficiency up to 97.7 %. Density functional theory calculations applied to uncover the catalytic mechanism of NO 2 – reduction reaction on Ag.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Panghu Zhou,Zunen Xia,Chao Qi,Meng He,Tengbo Yu,Lei Shi
Chitosan/Ag nanocomposite sponges were prepared by soaking the chitosan hydrogels in AgNO 3 aqueous solution, which was heated at 80 °C to synthesize Ag nanoparticles (AgNPs) in the porous chitosan matrix and freeze-dried. The structure and properties of the nanocomposite sponges were characterized by FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), and compressive testing. In our findings, the pores of the chitosan hydrogel were used as a microreactor to synthesize AgNPs, which could distribute evenly on the chitosan matrix. The chitosan/Ag nanocomposite sponges exhibited good mechanical properties, suitable water vapor transmission and noncytotoxicity. Antibacterial test revealed their excellent antibacterial activity against Staphylococcus aureus and E. coli . The chitosan/Ag nanocomposite sponges would have great potential as wound dressings due to their good properties and facile industrialization.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Ziyun Wang,Xuanli Zheng,Mengyao Gao,Jintian Zhao,Jinshen Lan,Xiaofang Ye,Jing Wan,Yuchen Fei,Shengshi Guo,Yuanfei Wu,Shengli Huang,Shuping Li,Junyong Kang
Plasmonic properties of the Ag nanocaps were analyzed by the finite-difference time-domain method, in addition to the fabrication and sensor application of the two-dimensional Ag nanocap arrays. The thickness limitation for the light penetration of the nanocaps was revealed. The evolution of the plasma modes with the shell thickness and structure of the nanocaps was illustrated. The hemisphere nanocap was found to own the strongest absorption intensity and field enhancement. The sensing ability of the fabricated Ag hemisphere nanocap arrays was evaluated by the Raman spectrum of the rhodamine 6G and methylene blue molecules. The ordered arrays displayed improved light absorption with intense plasmon coupling, resulting in the strong surface-enhanced Raman scattering with an enhanced factor 15 folds of the nanosphere arrays, which suggested that the metal nanocaps might be promising for biochemical sensor application.
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Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-12
·
IF 16.419
Jia Yunpeng,Pan Yamin,Wang Chunfeng,Liu Chuntai,Shen Changyu,Pan Caofeng,Guo Zhanhu,Liu Xianhu
Flexible Ag microparticle/MXene-based energy-harvesting films were fabricated via simple spraying and hot-pressing.
Optimal film shows high conductivity and effective electro/photo-thermal abilities.
It can be easy assembled single-electrode TENG and the output voltage is enhanced by assembled two triboelectrification layers.
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