SENSORS AND ACTUATORS A-PHYSICAL
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2025
·
IF 4.9
Jun Dong,Xinyue Li,Shaolong Tu,Qingyan Han,Chengyun Zhang,Kaili Ren,Tuo Li,Wei Gao,Jianxia Qi
Surface-enhanced Raman scattering (SERS) was extensively employed in the domains of target analysis and detection owing to its benefits of high sensitivity and nondestructive detection. In this study, polystyrene (PS) microspheres served as templates. PS microspheres were systematically assembled on silicon wafer surfaces using air-liquid interfacial self-assembly. Subsequently, a PMMA-anisole solution was spin-coated to fill the interstices of the microspheres. Following the removal of the templates using cyclohexane ultrasonication method, gold nanoparticles were deposited onto the substrates utilizing the three-phase self-assembly procedure to construct the AuNPs@PMMA sphere-cavity array substrate. When the PMMA-anisole solution concentration was 1%, the spinning speed was 5500 r/min, and the annealing temperature was 120 °C, the most regular nanostructure of the spherical cavity substrate was achieved. The Raman activity of the fabricated substrates was investigated with the selection of Rhodamine (R6G), Crystal Violet (CV) and Aspartame (APM) as target molecules. The experimental results indicated that AuNPs@PMMA sphere-cavity array substrate exhibiting high sensitivity, excellent uniformity, and stability, and the detection limits for R6G and CV were 10 -11 M and 10 -10 M, respectively. In addition, the substrate achieved a low detection limit of 0.0313 g/L for aspartame (APM), demonstrating the potential application of the substrate in food safety testing.
研究领域:
材料科学
·
分析化学
·
纳米技术
·
传感器
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Mingzhe Hu,Xin Zhang,Chang Zhang,Feng Qiu,Jiujie Ruan,Xiaoli Wang,Yu Zhang,Jie Zou,Qinghui Jin,Jiawen Jian
Metal halide perovskite nanocrystals (MHPNCs) have emerged as promising fluorescent sensing materials owing to their excellent optical properties. However, surface defects significantly influence their sensing performance, highlighting the importance of defect passivation for improving sensing capability. In this study, a fluorescent NH 3 sensor film was fabricated via electrospinning, in which arginine(ARG)-modified MAPbBr 3 (MA refers to methylammonium) quantum dots were encapsulated within poly(methyl methacrylate) (PMMA) nanofibers to investigate the effect of arginine passivation on NH 3 sensing performance. Under dynamic gas sensing conditions at 25°C and an ambient relative humidity, the sensor exhibited a concentration-dependent NH 3 response in the range of 1.25–200 ppm. The ARG-modified sensor exhibited an approximately 115% higher sensitivity than the sensor without ARG. The sensor showed a more pronounced response toward NH 3 than interfering gases at 200 ppm. Moreover, the maximum response variation was 3.33% during five consecutive NH 3 sensing cycles, and the fluorescence intensity of the sensor membrane remained above 80% of its initial value after 180 days of storage.
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产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Yang Chen,Xinbo Lu,Ziqiang Liu,Weiqiang Xiao,Lina Song,Linquan Lang,Hongqing Li,Xiaoli Zhan,Feng Gao,Qinghua Zhang
Critical issues such as leakage, degradation, and thermal response hysteresis have become the focus in the application of phase change materials (PCMs) in area such as thermal management of fabrics. The encapsulation of PCMs prepared as microcapsules using polysiloxanes, etc. as a component unit of crosslinking agents represents a highly promising avenue of research. In this work, organosilicon crosslinkers are prepared and employed for the crosslinking of poly (methyl methacrylate) (PMMA) for microencapsulation of paraffin wax in microcapsule phase change materials (mPCMs). The results showed that increasing the degree of crosslinking helps to improve the performance of mPCMs by smoothing the shell surface, but excessive crosslinking leads to flocculation, which reduces its performance. The mPCMs produced with 10% wt crosslinking agent gave the highest performance with encapsulation efficiency, melting enthalpy and crystallization enthalpy of 81.3%, 285.0 J g −1 and 253.1 J g −1 , respectively. The obtained mPCMs are also combined with epoxy resin and fabrics to form composite materials. Notably, the polysiloxane-modified mPCMs permit epoxy resins to achieve a maximum temperature reduction of 25 °C. By adjusting the mass ratio of organosilicon crosslinkers, the obtained mPCMs enable textiles to reach a maximum temperature reduction of 17 °C while maintaining satisfactory air permeability.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
PubMed
高影响因子
KEY ENGINEERING MATERIALS
·
2015
·
IF 0
Xiao Lin Wu,Jie Lin,Jian Yan Wang,Hang Guo
In this paper composite nanofiber membranes were prepared by electrospinning technology from poly (vinylidene fluoride) (PVDF)-poly (methyl methacrylate) (PMMA)-SiO2 blend solutions with different PMMA and SiO2 contents. It was found that the diameter of electrospun nanofibers was greatly increased with the added PMMA content but decreased with the added SiO2 content, and when both PMMA and SiO2 were added the diameter of electrospun nanofibers was decreased. With a proper ratio of the PMMA and SiO2 added, the electrospum nanofiber membrane could have a suitable diameter with high porosity. The XRD results revealed that electrospun nanofiber membranes contained mainly β-phase crystal structure of PVDF, and its crystalline is reduced with the added PMMA and SiO2 contents due to the inhibited crystallization of the polymer by the inorganic particles and PMMA during the solidification process. These nanofiber membranes exhibited a high electrolyte uptake, around 300%. Moreover, the incorporation of PMMA and SiO2 into the nanofiber membrane improved the ionic conductivity from 1.7×10−3S/cm to 2.0×10−3S/cm at room temperature. Compared with commercial film PE, their cell cycle and charge and discharge performance were also greatly improved.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
✓ 已验证
DOI
ENERGY CONVERSION AND MANAGEMENT
·
2016
·
IF 4.801
Pengju Han,Xiaolin Qiu,Lixin Lu,Liao Pan
MicroPCMs (microencapsulated phase-change materials) were successfully synthesized using PMMA (poly(methyl methacrylate)) and UF (urea-formaldehyde) as raw materials for hybrid shells, and n -tetradecane as core materials. NMA ( n -methylol acrylamide) with two functional groups of double-bond and hydroxymethyl was used as a crosslinking agent. The morphologies and chemical structures of microPCMs were characterized using scanning electron microscopy (SEM) and Fourier transformed infrared (FTIR) spectroscopy. The agglomerations of the UF/PMMA hybrid samples might be influenced by two factors: cross linking action of NMA and PMMA/UF ratio in shell materials. The phase change properties and thermal durability were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), respectively. The UF/NMA/PMMA hybrid shell microcapsules has an enthalpy of 175.5 J/g which is higher than the single-layer shell samples of PMMA and UF, and a better leakproofness than the UF/PMMA hybrid samples without NMA owing to the semi-IPN microstructure. Likewise, the UF/NMA/PMMA hybrid samples have higher thermal durability than the single layer shell samples of PMMA and UF and the UF/PMMA hybrid samples without NMA. Moreover, the thermal cycling test of the UF/PMMA hybrid samples with NMA was carried out for 100 heating/cooling cycles and indicated that the developed hybrid shell microPCMs have good chemical stability and thermal reliability. The heating-up experiment revealed that the foam treated by microcapsules had a better thermoregulatory property than the raw foam. Based on the results obtained, it can be concluded that n -tetradecane/UF/PMMA microPCMs have potential thermal energy storage applications.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Yunxiao Liu,Lijuan Zhou,Li Wang,Xiaolong Pan,Kuntao Wang,Jie Shu,Lehuan Liu,Hui Zhang,Leyu Lin,Xinyan Shi,Alois K. Schlarb,Jianming Zhang
Owing to the advantages in storage, transportation and melt-processing, the powder form of cellulose nanocrystals (CNCs) as an attractive biomass filler is highly desired for the industrial application. Herein, by systematically tailoring the reaction conditions, we prepared the air-dried porous powder of CNCs modified with PMMA (CNCs-g-PMMA) via a green synthesis route, that is, using ceric ammonium nitrate (CAN) as an initiator in aqueous medium . Our results show that the porous powder of air-dried CNCs-g-PMMA can be easily obtained when the grafting ratio of PMMA was higher than 70 wt%. CNCs-g-PMMA porous powder demonstrates high specific surface area (47.8 m 2 /g), excellent hydrophobicity and oleophilicity properties. It therefore can be used as a filter for oil/water separation or as a highly efficient absorbing material. Moreover, benefiting from the improved thermal stability of CNCs and melt-processing character of PMMA, the porous powder of CNCs-g-PMMA has been converted to a transparent film by a simple compression molding . The as-prepared film demonstrates extraordinary UV shielding and mechanical stability upon heating. Particularly, there is an extraordinary increase in glass transition temperature of PMMA from 112.6 to 138.6 °C. This research provides a facile and green strategy to fabricate CNCs-g-PMMA porous powder, which shows industrial applications from different perspectives.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2014
·
IF 3.633
Xinzhou Wu,Fei Fei,Zheng Chen,Wenming Su,Zheng Cui
A new nanocomposite dielectric ink has been developed by dispersing Ca 2 Nb 3 O 10 nanosheets in acetone diluted PMMA solution. Dielectric films were formed by printing the ink with an aerosol jet printer. SEM images showed that the 2D nanosheets were homogeneously distributed in the printed films which exhibited higher dielectric constants than PMMA, low dielectric loss and good dielectric stability over a wide range of frequencies. The effect of nanosheet content in the ink has been investigated. Thin-film transistors based on indium gallium zinc oxide semiconductor material were fabricated with the printed nanocomposite insulator. The feasibility of printing dielectrics based on the new nanocomposite ink for thin-film transistors has been demonstrated.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Xiaoting Liu,Wenya Chen,Jiapeng Yang,Xiaojuan Liang,Xiaoli Fang,Weidong Xiang
As we all know, the various excellent properties of perovskite nanocrystals (NCs) have attracted attention in recent years. However, thei work stability is still the bottleneck to be solved urgently in their commercialization process. In this study, we encapsulated CsPbBr3 quantum dots in nano-SiO2 (inorganic) by a high-temperature sintering method and investigated the changes in optical stability before and after encapsulation. The SiO2 shell can effectively suppress anion exchange and photodegradation, which greatly improves the photothermal stability of shell NCs. Preparation of composite films by mixing CsPbBr3–SiO2 (inorganic) and polymer material PMMA (organic) by a solvent solution method can further enhance its stability. Meanwhile, the backlight display device realized the practical application of CsPbBr3–SiO2/CsPbBr1.2I1.8@PMMA with a wide color gamut (112% of the NTSC, 84% of the Rec. 2020). This is a very significant step to open up the awkward situation of the practical application of perovskite NC materials in backlight displays.
研究领域:
材料科学
·
光电技术
·
显示技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wenyu Qiu,Yukun Wu,Yichen Wang,Zhiting Yang,Rui Yang,Chenxi Zhang,Yang Hao,Yuying Hao
Hybrid halide perovskite solar cells (PSCs) have enormous potential to provide energy for future space exploration and aerospace due to their unique advantages in harsh environments. Unfortunately, it is challenging to fabricate robust PSCs that are insensitive to low temperatures. This study presented the performance evolution of methylammonium triiodide (MAPbI 3 ) PSCs across a temperature range of 290 to 90 K and highlighted the decisive impact of interfacial defects on the devices’ low-temperature performance. The introduction of polymethyl methacrylate (PMMA) as interface modification layer, efficiently passivated the interface defects, released the interfacial stress, and thus decreased the phase transition temperature. As a result, the PMMA-modified device achieved a maximum efficiency of 22.4% at 90 K which was one of the highest efficiencies reported for MA-based PSCs at low temperatures. Remarkably, the PMMA-modified device retained nearly 100% of initial efficiency after 26 temperature cycling tests between 290 and 90 K, whereas the control device maintained only 62% of initial efficiency. This work demonstrated that interface engineering is a promising strategy for improving the low-temperature performance of PSCs.
研究领域:
材料科学
·
能源研究
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhiwei Wang,Liangsheng Tian,Suwit Suthirakun,Wongsathorn Kaewraung,Anjali Verma,Yaning Yu,Bin Wang,Peng Jiang,Hang Zhao,Xin Xin,M.A. Subramanian
Magnetoplumbite-type oxides display various properties and find applications in multiple fields. In this study, a novel magnetoplumbite-type solid solution BaZn 6- x Ni x Ti 6 O 19 (0 ≤ x ≤ 4) with vivid green color was synthesized through a high-temperature solid-phase method for the first time. The as-synthesized BaZn 6- x Ni x Ti 6 O 19 solid solution crystallizes in the space group of P6 3 / mmc . The solid solution exhibits excellent green property, and its color is adjustable with increasing doping levels of Ni 2+ . The depth of color originates from the content and position of Ni 2+ in the solid solution. BaZn 6- x Ni x Ti 6 O 19 is suitable for PMMA (Polymethyl methacrylate) pigment and hydrophobic coating. Colored PMMA containing BaZn 6- x Ni x Ti 6 O 19 exhibits vibrant colors with high saturation, showing excellent application potential. The hydrophobic coating compounded with BaZn 6- x Ni x Ti 6 O 19 exhibits near-superhydrophobic properties and demonstrates excellent self-cleaning effects under simulated natural environmental conditions.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yang Li,Zhao Wang,Hujie Zhao,Xiaojun Huang,Mujie Yang
Formation of heterostructure and nanostructure is promising approach to improving the photocatalytic activity of TiO 2 based photocatalysts . In this work, MoS 2 @TiO 2 @poly(methyl methacrylate) (PMMA) was prepared by freeze drying of hydrothermally treated electrospun PMMA nanofibers containing titanium n-butoxide and MoS 2 nanosheets . As-prepared nanocomposite revealed a 3D nanofiber network structure with high specific surface (83.6 m 2 /g), in which MoS 2 nanosheets loaded with TiO 2 nanoparticles were distributed on the surface of PMMA fibers. MoS 2 @TiO 2 @PMMA showed better photocatalytic performance than MoS 2 @PMMA, TiO 2 @PMMA, MoS 2 @TiO 2 and MoS 2 @P25@PMMA towards the photodegradation of methyl orange (MO) under UV illumination. Typically, MoS 2 @TiO 2 @PMMA (100 mg) could degrade MO (10 mg/L, 100 mL) completely in 40 min under UV irradiation , revealing good photocatalytic activity . Moreover, the nanocomposite could be facilely recovered by filtration, and maintain almost the same photocatalytic activity after cycling tests for ten times, indicating excellent stability and recyclability. The enhanced photocatalytic performance of the nanocomposite might relate to the heterostructure between MoS 2 and TiO 2 to suppress the recombination of photo-induced charge, and the 3D hierarchical nanoweb structure to afford large specific surface area and high density of active sites.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 63
·58218-58225
·
IF 3.289
Henmei Ni,Junxiu Liu,Kai Shi,Min Wu,Yadong Yang,Lijuan Zhang
The reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of methyl methacrylate (MMA) was carried out in ethanol using polymethacrylic acid (PMAA)–4-cyanopentanoic acid dithiobenzoate (CADB) (degree of polymerization = 30, 122 and 450) as a macro chain transfer agent (CTA) and 2,2′-azobis(2,4-diemthyl valeronitrile) (V-65) as an initiator. In contrast to the random copolymerization systems, a dramatic increase of conductivity during the initial stage of RAFT polymerization was observed. It was confirmed that the conductivity resulted from the charged solvophobic blocks of soluble diblock copolymers, strongly dependent on the chain length of PMAA-CTA and PMMA. Objects of PMAA-b-PMMA were prepared by three methods, i.e. the polymerization-, temperature- and ion-induced self-assembly. The procedure of self-assembly commonly resulted in a dramatic decrease of conductivity. All results indicated that the electrostatic interaction played a role in the process of self-assembly, rather than just the solvophobic interaction of PMMA blocks in ethanol.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）