SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Qingyan Han,Hao Zhang,Andrey Kaplan,Shixing Fan,Yazhou Xu,Chengyun Zhang,Wei Gao,Enjie He,Jun Dong
Surface-enhanced Raman scattering (SERS) with ultrahigh sensitivity has garnered significant attention for quantitative analysis and chemically specific detection. However, conventional SERS platforms, typically structured by depositing plasmonic micro/nanoparticles onto rigid substrates, face limitations in further advancement and applications. In this study, we present a novel method to prepare a flexible SERS film substrate composed of graphene overlayer (G) atop a self-assembled array of silver micropopcorns (Ag MPs) and a polymethyl methacrylate (PMMA) membrane. We show that adding an overlayer of graphene improves substantially overall SERS performance. This flexible G/Ag MPs/PMMA film substrate achieves a detection limit as low as 100 picomolar for rhodamine 6G (Rh6G) molecules and identifies mixtures containing Rh6G (10 −11 M) and crystal violet (CV, 10 −6 M) molecules. Furthermore, the flexible SERS structure enables quantitative detection of thiram, achieving a detection limit of 0.005 ppm, well below the allowable limit in food. This study provides a robust SERS platform that advances fundamental research and facilitates the development of practical applications in quantitative analysis, detection, and biological sensing. Combining graphene and Ag MPs on a flexible PMMA substrate offers a versatile and scalable approach to enhancing SERS performance, paving the way for future innovations.
研究领域:
分析化学
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纳米技术
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材料科学
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光学传感
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化学检测
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2018
·
IF 2.21
Jinyuan Bai,Yang Liu,Yanjun Hou,Shuhong Wang
A new luminescent europium(III) bis-β-diketonate complex, Eu 2 (PBT) 3 (NO 3 ) 3 (PBT = 1,1-(pyridine-2,6-diyl)bis(4,4,4-trifluoro-1,3-dione), was incorporated into the poly(methylmethacrylate) (PMMA) matrix and formed nanofibers via electrospinning technology. The different characterization techniques were adopted to reveal the effect of Eu 2 (PBT) 3 (NO 3 ) 3 on the spatial structure and optical properties of the nano-composite fibers obtained. The doping enhances the thermal stability and filament-forming properties for a series of PMMA-supported composite nanofibers Eu/PMMA, and in particular, the doping concentrations of 11 wt% also showed more efficient luminescence properties. Furthermore, the Judd-Ofelt theory was applied in this study to explain the effect of the distribution of Eu 2 (PBT) 3 (NO 3 ) 3 and the mutual effect of the Eu 2 (PBT) 3 (NO 3 ) 3 coordination compound and surrounding fractions of PMMA.
研究领域:
材料科学
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光学
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2013
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IF 3.328
Biyun Li,Huihua Yuan,Yanzhong Zhang
This paper deals with development of a novel poly(methyl methacrylate) (PMMA) based transparent nanocomposite made from using electrospun graphene-incorporated-Nylon 6 (Gr/PA-6) nanofibers as the reinforcement, in which both the mechanical and optical properties of the developed Gr/PA-6/PMMA nanocomposite are paid particular attention. By introducing the concept of electrospun PA-6 nanofibers as the dispersing carrier for graphene nanosheets and by employing a facile self-blending co-electrospinning approach for homogeneously hybridizing nanocomposite nanofibers of Gr/PA-6 with PMMA fibers, aggregation issue of the involved nanofillers (i.e., the Gr nanosheets and the Gr-incorporated PA-6 nanofibers) within the PMMA matrix could be effectively addressed. Visible light transmittance and tensile mechanical properties of the hot-pressed Gr/PA-6/PMMA nanocomposite were examined in relation to the loading fractions of the Gr nanosheets in the nanocomposite. It was demonstrated that a significant enhancement in tensile mechanical properties of the Gr/PA-6/PMMA nanocomposite was accomplished at a Gr loading of merely 0.01 wt%; that is, a nearly 56%, 113% respective improvement of tensile strength , Young’s modulus, and noticeably above 250% increase of fracture toughness were achieved, while the transmittance of the nanocomposite was maintained above 70% (in other words, less than 10% loss in transparency in comparison with neat PMMA) in the visible wavelength range of 400–800 nm.
研究领域:
材料科学
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纳米技术
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聚合物复合材料
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光学材料
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DOI
高影响因子
Surfaces and Interfaces
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2026
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IF 6
Jiehao Qu,Chenni Wu,Xiangdong Liu
The growing use of polymethyl methacrylate (PMMA) in medical devices and food contact materials demands low‑toxicity antibacterial agents and compatible preparation methods. Current technologies struggle to prevent agent migration without sacrificing optical transparency and contact safety, limiting their adoption in busy public areas such as hospitals and schools. Herein, a hydrophilic natural antibacterial compound was hydrophobically modified by grafting unsaturated aliphatic chains and then used to fabricate a surface thin‑layer antibacterial PMMA via UV curing. The resulting material showed strong activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) , with minimum bactericidal concentrations of 4 mg/g and 32 mg/g respectively. It maintained a high optical transmittance above 92% and exhibited no detectable leaching of the antibacterial agent. Physical, thermomechanical, and wear‑resistant evaluations revealed a 2 °C higher heat deflection temperature for the antibacterial PMMA compared to the control, with all other properties comparable. The material also shows promise for managing indoor photothermal environments by filtering harmful ultraviolet and blue light spectra. This work provides a feasible pathway for developing high‑performance antibacterial PMMA. Download: Download high-res image (137KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 3.1
Ting Song,Shuxin Cao,Tao Song,Guidong Li,Zhibin Luo,Cuiqin Pan,Chun Li,Yuqing Li
The inherent poor solvent resistance and brittleness of poly(methyl methacrylate) (PMMA) limit its applications requiring frequent ethanol disinfection, where the material is susceptible to cracking and failure. A crosslinked system is designed to improve the ethanol resistance of PMMA. To preserve the optical properties of crosslinked PMMA, varying molar ratios of the comonomer butyl methacrylate, which imparts additional free volume to compensate for transmittance loss of the final crosslinked material, are pre-copolymerized with MMA to obtain copolymer syrups. Crosslinked films are then fabricated via one-pot in situ polymerization and crosslinking by casting copolymer syrups containing the crosslinker 1,4-butanediol dimethacrylate. The crosslinked film with the highest crosslinking density (5 mol% crosslinker) possesses the maximum strength retention rates of 101.5% and 68.7% after immersion in ethanol for 5 min and 24 h, respectively. It represents a significant improvement over the pure PMMA, which retained only 93.8% and 53.8% under same conditions. Although crosslinked structures generally sacrifice the transmittance of optical resins, the 5 mol% crosslinked film exhibited the lowest transmittance (92.0% ± 0.6%), only slightly lower than that of pure PMMA (92.3% ± 0.2%). The toughness crosslinked films varied from 2.7 to 1.2 MJ/m 3 , which exceeded that of pure PMMA (1.0 MJ/m 3 ).
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产品关联
DOI
高影响因子
ACS Macro Letters
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2012
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IF 0
Weichao Shi,Fenghua Chen,Yan Zhang,Charles C. Han
Polymer blends with dynamic asymmetry have attracted much interest recently. In this study, we report a more typical case where the dynamically asymmetric system is highly immiscible. We find that there is a transient network growth and phase inversion for the slow minor component. The network structure shows a hierarchical growth behavior, which is the result of competition between a slow relaxation-controlled concentration growth on local scale and a fast hydrodynamic growth on large scale. When phase separation couples with a subsequent crystallization, the interfacial boundary may assist lateral crystallization and irregular spherulites would grow epitaxially around the amorphous component-rich domains. The interface may play the role of substrates for heterogeneous nucleation. These phenomena may help us with morphological control in material processing.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
PubMed
Polymers
·
2019
·Vol. 11
·期 4
·601
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IF 3.164
Jiayao Chen,Jing Li,Lirong Xu,Wei Hong,Yuzhao Yang,Xudong Chen
The interfacial effect is one of the significant factors in the glass-transition temperature (Tg) of the polymeric thin film system, competing against the free surface effect. Herein, the Tgs of poly (methyl methacrylate) (PMMA) films with different thicknesses and substrates are studied by fluorescence measurements, focusing on the influence of interfacial effects on the Tgs. The strong interaction between PMMA and quartz substrate leads to increased Tgs with the decreased thickness of the film. The plasmonic silver substrate causes enhanced fluorescence intensity near the interface, resulting in the delayed reduction of the Tgs with the increasing film thickness. Moreover, as a proof of the interface-dependent Tgs, hydrogen bonds of PMMA/quartz and molecules orientation of PMMA/silver are explored by the Raman spectroscopy, and the interfacial interaction energy is calculated by the molecular dynamics simulation. In this study, we probe the inter-relationship between the interfacial interactions arising from the different substrates and the Tgbehavior of polymer thin films.Keywords:glass-transition temperature;temperature dependent fluorescence;surface plasmon;interfacial effect;conformation
研究领域:
材料科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Min He,Haoran Hu,Ping Wang,Haitian Fu,Jiugang Yuan,Qiang Wang,Xuerong Fan
Silk sericin (SS) derived from silkworms has the characteristics of anti-oxidation, antibacterial, and biocompatibility, however, high solubility in water restricted its applications in biomedical fields. In the present work, SS was enzymatically graft-copolymerized with a hydrophobic vinyl monomer of methyl methacrylate (MMA), through a free radical reaction, through the combination use of hydrogen peroxide and horseradish peroxidase (HRP). Efficacy of the HRP-mediated reaction was examined by means of FTIR, SDS-PAGE, and SEC chromatogram. A bio-composite of SS- graft -polymethyl methacrylate (SS-g-PMMA) was constructed subsequently, the corresponding wettability, thermal behavior, and biocompatibility of the obtained composite were examined, respectively. The data reveal that MMA was successfully copolymerized with the reactive sites in sericin chains, resulting in a noticeable increase in the molecular weight. For the membrane of SS-g-PMMA, the surface hydrophobicity was evidently improved compared to that of the untreated, according to the determined data of water contact angle and dissolution ratio. The current work develops an eco-friendly technique for reuse of the industrial waste like sericin, and provides a novel method for preparation of the sericin-based biomaterials as well.
研究领域:
材料科学
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生物医学工程
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高分子化学
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产品关联
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2018
·Vol. 28
·期 6
·2701-2713
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IF 1.754
Wu Gang,Guo Shuang,Yin Yue,Sun Gang,Zhong Yongjian,You Bo
This paper presented a facile method to prepare the silica/poly (methyl methacrylate) (SiO 2 /PMMA) nanocomposite hollow microspheres (NHSs) which were firstly applied to fabricate the light diffusion films with high transmittance and high haze simultaneously. The SiO 2 /PMMA NHSs were prepared via in situ diffusion of polymeric core into the voids of inorganic shell under strong electrostatic attraction. The hollow morphologies of the microspheres were studied under the help of transmission electron microscope and scanning electronic microscope. The formation process of these NHSs could be elucidated using a mechanism similar to the Kirkendall effect. These NHSs were firstly used to produce light diffusion films by blending with polyacrylate latex. The new kind of light diffusion films with micro-nano structure were built by casting the SiO 2 /PMMA NHSs/polyacrylate coatings on optical-grade PET films. The transmittance and haze value of the light diffusion films were tested by a haze meter and application on a LED lamp. As a result, the coating films with NHSs had the best light diffusion properties compared to those films with no spheres or nanocomposite solid microspheres, which indicated that the light diffusion films with NHSs were promisingly applied in LED illumination, photoelectric devices and large area LCD.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2024
·Vol. 81
·期 13
·12027-12043
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IF 3.1
Wu Weilong,Feng Shihao,Ouyang Qin,Yang Zengzhuan,He Liu,Huang Qing
Polymethyl methacrylate (PMMA) is an important thermoplastic polymer and a versatile lithographic resist. However, the low heat resistance and low dry-etch resistance seriously restricts the application of PMMA in high-end devices and advanced nanolithography. Herein, methyl methacrylate (MMA) was copolymerized with two comonomers 1-adamantyl methacrylate (AdMA) and 1-acryloyloxy-3-hydroxyadamantane (HAdMA), and a series of copolymers P(AdMA-co-MMA) and P(HAdMA-co-MMA) with different contents of HAdMA were prepared. The UV–Vis, ellipsometer, DSC, TG, and TG–MS techniques were employed to investigate the effects of adamantyl and hydroxyadamantyl substituents on the optical and thermal properties of PMMA. The introduced hydroxyadamantyl not only significantly enhanced the refractive index, but also maintained the high transparency and low dispersion of PMMA. The glass transition temperature and thermal stability of PMMA were also greatly improved by the hydroxyadamantyl. The initial decomposition temperature of PMMA increased from 160 to about 260 ℃ after introducing 5% HAdMA. HAdMA was more effective than AdMA in improving the optical and thermal properties of PMMA. The novel P(HAdMA-co-MMA) copolymer has overcome the shortcomings of traditional PMMA and is anticipated to significantly broaden its range of applications.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2023
·
IF 5
Siyuan Yu,Jinfeng Xing
Erythromycin (EM) was encapsulated into poly(methyl methacrylate) (PMMA) and poly(methyl methacrylate- co - N -vinylcaprolactam) (P(MMA-NVCL)) microspheres in situ by oil-in-water emulsion photopolymerization under green LED irradiation. The physicochemical properties of PMMA-EM and P(MMA-NVCL)-EM microspheres were characterized by SEM, FTIR, TG-DSC and DLS. P(MMA-NVCL)-EM microspheres showed temperature sensitivity, and the EM loading content of PMMA-EM and P(MMA-NVCL)-EM microspheres reached 9.7% and 15.6%, respectively. In vitro release of EM from microspheres presented good controlled release behavior in 12 h. Further release kinetic and thermodynamic investigation revealed that the release process was mainly dominated by EM concentration, accompanied by microspheres relaxation and rupture of hydrogen bonds .
研究领域:
材料科学
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药学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Xing Kun,Hao Yanan,Wang Xin-Jie,Huang Lei,Gao Yi,Liang Tong,Meng Yan,Bi Ke,Zhong Shao-Long,Dang Zhi-Min
Maintaining high charge/discharge efficiency while enhancing discharged energy density is crucial for energy storage dielectric films applied in electrostatic capacitors. Here, a nano-submicron structural film comprising ferroelectric material P(VDF-HFP) and linear dielectric material PMMA has been flexibly designed via the electrospinning process. Nano-submicron structure enables the film to maximize the ferroelectric material component and obtain improved dielectric performance without sacrificing breakdown strength and charge/discharge efficiency. As a result, the 40%-420 nm PMMA-P(VDF-HFP)@PMMA sample achieved an discharged energy density of 13.72 J/cm³ at a field of 740 kV/mm, with an impressive charge/discharge efficiency of 80%. This work presents a composite dielectric film that excels in breakdown strength, discharged energy density, and charge/discharge efficiency, offering a strategy for designing reliable, industrial-grade energy storage dielectrics.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）