Advanced Materials Technologies
·
2023
·Vol. 8
·期 8
·2201610
·
IF 6.8
Mengya Cui,Ting Huang,Zeyu Peng,Lingrong Xing,Zheng Zhou,Liang Guo,Jianli Wang,Jiejie Xu,Rongshi Xiao
Laser direct writing (LDW) is a promising approach for fabricating metallic micropatterns on transparent substrates for transparent electronic circuits that satisfy both electronic and optical criteria. However, high efficiency and precision patterning remain a challenge for both photochemical and photothermal LDW. Herein, a novel method is proposed with a femtosecond laser to achieve a highly-efficient photothermal process via single-photon absorption by photosensitive particles (SPA-FsLDW). The dispersive photosensitive particles act as numerous heating sources, enabling simultaneous multiple-location photothermal reactions and highly-efficient metallization due to heat-induced metal ion reduction. The new approach effectively exploits the excellent heat-input regulation with the ultrashort pulse of the femtosecond laser to achieve great temperature controllability and precision. It is shown that, with a deposition rate of ≈10 7 µm 3 s −1 and electrical resistivity of ≈10 −7 Ω m, SPA-FsLDW improves efficiency and electrical resistivity by at least one order of magnitude compared to previously reported FsLDW. A self-powered sensor is fabricated using SPA-FsLDW, demonstrating its practical applicability.
研究领域:
材料科学
·
光学工程
·
电子制造技术
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DOI
高影响因子
ANALYST
·
2016
·Vol. 141
·期 20
·5864-5869
·
IF 4.033
Ningning Zhou,Guowen Meng,Zhulin Huang,Yan Ke,Qitao Zhou,Xiaoye Hu
This report presents a simple and inexpensive fabrication approach to a flexible transparent composite film as a “cut-and-paste” surface-enhanced Raman scattering (SERS) substrate for in situ detection of organic pollutants. First, a self-assembled monolayer of Ag-nanocubes (Ag-NCs) is obtained at the air/water interface. Then, the Ag-NC monolayer is retrieved onto a flexible transparent polyethylene (PE) film to achieve an Ag-NC@PE composite film as a flexible SERS substrate. As the Ag-NCs in the monolayer are closely and uniformly packed on the PE film, the Ag-NC@PE composite film shows high SERS-activity with good signal homogeneity and reproducibility. Furthermore, the flexible transparent Ag-NC@PE composite film is “cut into” small pieces and directly “pasted” onto contaminated fruits for in situ SERS detection, as a result 10 nM thiram, 1 μM 4-polychlorinated biphenyl and 10 nM methyl parathion contaminants on oranges are detected, respectively. Therefore the Ag-NC@PE composite film is an inexpensive and effective SERS substrate for rapid in situ detection of organic pollutants in aqueous solutions, on fruits and other solid objects.
研究领域:
材料科学
·
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Meng Sun,Houjia Zhang,Hefu Li,Xuehui Hao,Changzheng Wang,Lijun Li,Zhenshan Yang,Cunwei Tian
Flexible and transparent surface-enhanced Raman scattering (SERS) substrates have attracted much attention as a fast, sensitive and in situ detection platform for practical applications. However, the large-area fabrication of flexible and transparent SERS substrates with high performance is still challenging. Here, a flexible and transparent SERS substrate based on large-area thin PDMS film decorated with Ag microlabyrinth/nanoparticles hierarchical structures (denoted as ALNHS@PDMS) is fabricated by using the floating-on-water method and magnetron sputtering technology. By optimizing the sputtering time, the ALNHS with multiple hot spots are uniformly distributed on the PDMS surface. Based on characterizing the rhodamine 6G (R6G) with a portable Raman spectrometer, the optimal ALNHS@PDMS film exhibits a high enhancement factor (5.2 × 10 6 ), excellent uniformity and reproducibility, as well as superior mechanical stability. In addition, thanks to the good sticky feature and bi-directional activation property of the thin ALNHS@PDMS film, the prepared flexible and transparent SERS substrate can achieve in situ detection of malachite green residues (10 -6 M) on apple and tomato skins. This large-area, thin, mechanically robust, flexible and transparent ALNHS@PDMS film, integrated with a portable Raman spectrometer, shows great potential for point-of-care testing (POCT) in practical applications.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mengqi He,Hao Wu,Xin Cai,Shuangyun Li,Shiting Cao,Xiaofang Zhao,Meifeng Xu,Chaonan Wang
In this work, hierarchical structure composed of periodic nanopillars and wrinkles was designed on flexible and transparent PDMS through a strategy combining template method and oxygen plasma treatment. Investigations on the SERS performance of the substrates obtained after Ag thermal deposition reveal both the nanopillars and the wrinkles contributed greatly to the enhancement. The formation of the periodic wrinkles followed the buckling theory. Under the condition of 30 % deformation and 40 W plasma power, by adjusting the deposition time to 30 min, dense distribution of Ag NPs on the hierarchical PDMS support was achieved while avoiding coverage of the nano wrinkles. The obtained substrate named Ag-30/PDMS-PW had an EF of 3.11×10 7 , excellent uniformity and outstanding reproducibility with an RSD of 2.13 % and 4.9 % respectively. Cyclic loading and tensile tests verify the mechanical stability and perfect elasticity of the Ag-30/PDMS-PW substrate. Coupled with the bi-direction excitation ability, the as-prepared substrate was fully qualified for in-situ detection of pesticide residues, which was demonstrated by the in-situ detection of thiram and thiabendazole on apple surface with concentrations lower than the maximum residue limits. The results manifest the proposed substrate has great potential for in-situ food safety monitoring in real-world applications.
研究领域:
材料科学
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食品安全
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Shenghua Xue,Shihan Wu,Shuo Yang,Shujuan Liu,Qian Ye,Feng Zhou
Biofouling at material interfaces undermines optical clarity, increases energy consumption, and accelerates device failure in marine, biomedical, and industrial contexts. Herein, we present the fabrication and antifouling performance of poly(vinylbenzyl–DABCO propane sulfonate) (PVBSB) zwitterionic polymer–functionalized coatings. A silica-sol underlayer was first deposited on glass, followed by the co -deposition of polydopamine (PDA) and polyethyleneimine (PEI) to form a robust precursor film enriched with anchoring sites for subsequent polymer grafting. Surface-initiated atom transfer radical polymerization (SI-ATRP), in a grafting-from approach, was then employed to directly grow PVBSB polymer brushes from the glass surface, yielding the Glass-PVBSB coating. The resulting surface demonstrated exceptional antifouling performance, with antibacterial rates exceeding 99 % against Escherichia coli and Staphylococcus aureus , and anti-adhesion removal efficiencies of 87.5 % and 96.9 % against Navicula and Dunaliella , respectively, while maintaining optical transmittance above 90 % across the visible spectrum.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
生物医学工程
·
海洋防污
·
纳米技术
·
功能涂层
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Jinyue Ma,Xiuxian Gu,Junhui He
Hygroscopic polymers are good candidates for antifogging coatings, but their long-term effectiveness is limited by the equilibrium between water absorption and expansion. As an efficient and environmentally friendly solution, photothermal materials are being introduced into the field of antifogging. However, there is a need for enhancement in the spectral characteristics of most photothermal materials within the visible light region. In addition, photothermal antifogging coatings often exhibit a delay in heating response, which hinders their ability to promptly evaporate condensed water droplets in the absence of illumination or during initial illumination. Here, a bilayer structure design of photothermal nanomaterials/hygroscopic polymers is proposed to achieve long-term antifogging under sunlight activation. Ensuring the rapid absorption of condensed water droplets on the coating surface, while simultaneously achieving efficient photothermal conversion for a swift temperature increase over the entire coating, is key to this approach, which will not only suppress early fogging but also lead to an exponential decrease of the nucleation rate of droplets. During this process, a dynamic equilibrium is gradually established between the condensation and evaporation of fog droplets, leading to long-term antifogging properties. The light transmittance of the composite coatings reaches as high as ca. 75% in the visible light region, making them well suited for a diverse range of transparent substrate and device applications. A clear field of view can be maintained for at least 6 h under 1 sun illumination above 65 °C hot steam. The antifogging/defogging performance is effectively demonstrated even under challenging non-ideal natural conditions, such as low solar irradiation during dusk or when placed indoors behind windows.
研究领域:
材料科学
·
光学
·
表面工程
·
环境科学
✓ 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）