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Food Science and Human Wellness 2024年第5期13卷 2595-2600页

作者： Shiyao Wang Yanan Zhao Xiao Wei Yisheng Chen College of Food Science and Engineering Shanxi Agricultural UniversityTaigu 030801China Food Nutrition and Safety Institute Shanxi Agricultural UniversityTaiyuan 030031China School of Food Science and Technology Jiangnan UniversityWuxi 214122China

Melamine is one of the most frequently detected adulterants in dairy *** current study proposes a surface-enhanced Raman spectroscopy(SERS)-based analytical tool for fast and reliable screening of melamine in bovine milk.A hand-held Raman spectrometer was used in conjunction with a substrate composed of silver nanoparticles(AgNPs)that was 2D printed onto glass fiber(GF)filter *** optimized conditions,a sensitive and fingerprint-like signal at 674 cm^(-1) was *** AgNPs/GF substrate exhibited high sensitivity to melamine in milk down to 1.9498×10^(-5)mg/mL,which is well below the USA and EU safety limits(2.5×10^(-3)mg/mL).Remarkably,the proposed technology was also highly reproducible,showing spot-to-spot and block-to-block variations below 3.3%and 4.9%at 674 cm^(-1) in Raman intensity,*** characteristic peak intensity and concentration of melamine showed an acceptable linear relationship(R^(2)=0.9909)within the range of 0.0001-1 mg/***,the method established in this study can provide an efficient and effective method for the quantitative target screening and detection of melamine in dairy products.

关键词： 2D print Melamine Milk Surface-enhanced Raman spectroscopy(SERS) flexible substrate

Recent progress in printing flexible electronics: A review

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Science China(Technological Sciences) 2024年第8期67卷 2363-2386页

作者： BI Sheng GAO BuHan HAN Xu HE ZhengRan METTS Jacob JIANG ChengMing ASARE-YEBOAH Kyeiwaa Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education School of Mechanical EngineeringDalian University of TechnologyDalian 116024China Center for Materials for Information Technology The University of AlabamaTuscaloosaAL 35487USA Department of Electrical and Computer Engineering Penn State BehrendEriePA 16563USA

Miniaturization and flexibility are becoming the trend in the development of electronic products. These key features are driving new methods in the manufacturing of such products. Printed electronics technology is a novel additive manufacturing technique that uses active inks to print onto a diverse set of substrates, realizing large-area, low-cost, flexible and green manufacturing of electronic products. These advantageous properties make it extremely compatible with flexible electronics fabrication and extend as far as offering revolutionary methods in the production of flexible electronic devices. In this paper, the details of a printing process system are introduced, including the materials that can be employed as inks, common substrates, and the most recently reported printing strategies. An assessment of future setbacks and developments of printed flexible electronics is also presented.

关键词： flexible electronics printing process conductive ink flexible substrate

A unified model for determining fracture strain of metal films on flexible substrates

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Journal of Materials Science & Technology 2020年第19期54卷 87-94页

作者： Xu-Ping Wu Xue-Mei Luo Hong-Lei Chen Ji-Peng Zou Guang-Ping Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of Chin1Shenyang 110016China

Failure strain determination of polymer-supported thin films is a key for the design of the flexible devices.A theoretical model R/R0=(L/L0)2(R,L are the electrical resistance and the length of the stretched film,respectively.R0,L0 are the corresponding initial values.)has been widely used to determine the fracture strain of thin films on flexible ***,this equation loses its function in some special ***,a simple and universal theoretical model was proposed to determine the fracture strain of metal thin films on flexible substrates in more generally *** this model,we investigated the thicknessdependent failure strains of Cu-5 at.%Al films with thickness of 10 nm,200 nm,1000 nm,and Ti films with thickness of 50 nm,100 nm,300 *** model was also employed to study the published data *** results showed that the new model provided a fairly good prediction of the failure strains of different films.

关键词： Thin films Fracture Electrical resistance Microstructure flexible substrate

Fabrication of Non-woven Fabric-Based SERS substrate for Direct Detection of Pesticide Residues in Fruits

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Journal of Analysis and Testing 2017年第4期1卷 322-329页

作者： Lemei Cai Zhuo Deng Jing Dong Shidong Song Yiru Wang Xi Chen Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamenFujian 361005China

In surface-enhanced Raman scattering(SERS),flexible substrate plays an important role in target molecular collection from various shape surfaces and increases the analytical *** this study,silver nanoparticles(Ag NPs)were deposited on a non-woven fabric used as an SERS substrate by self-assembly,in situ growing or the self-assembly/in situ growing combination method.4-Aminothiophenol was selected as a model molecular for the evaluation of the SERS performance using the *** Ag NPs substrate prepared by self-assembly/in situ growing method presented the best Raman enhancement effect and its enhancement factor was estimated as high as *** substrate was applied to the determination of four pesticide residues on the surfaces of fruit samples through wipe sampling,and the results revealed the good reproducibility of SERS responses and high detection *** prepared flexible substrate was simple to fabricate and environmentally *** could be expected to be a useful tool in rapid on-site test of pesticide residues on fruit surfaces because of its high sensitivity,convenience and non-destructive characteristics.

关键词： SERS Non-woven fabric flexible substrate Pesticide residues

Large-area, flexible Polymer Solar Cell Based on Silver Nanowires as Transparent Electrode by Roll-to-Roll Printing

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Chinese Journal of Polymer Science 2017年第2期35卷 261-268页

作者： Yi-fan Zhao Wen-jun Zou Huan Li 吕琨延卫魏志祥 Chinese Academy of Sciences Key Laboratory of Nanosystem and Hierarchical Fabrication Chinese Academy of Sciences Center for Excellence in Nanoscienee National Center for Nanoscience and Technology Beijing 100190 China Department of Environmental Science and Engineering Xi ＇an Jiaotong University Xi ＇an 700049 China

Conventional organic solar cell＇s （OSC） architectures, including rigid transparent substrate （Glass）, conductive electrode （Indium tin oxide, ITO） and small working areas, are widely utilized in organic photovoltaic fields. However, such a structure as well as conventional spin-coating method obviously restrict their industrial application. In this article, we report the deposition of silver nanowires （AgNWs） on the flexible substrate by slot-die printing. The obtained AgNWs films exhibited a high transmittance and a low resistance, and were further used as the transparent conductive electrode ofOSCs. A typical conjugated polymer, poly[（2-5-bis（2-hexyldecyloxy）phenylene）-alt-（5,6-difluoro-4,7-di（thiophen-2-yl）benzo[c] [1,2,5]thiadiazole）] （PPDT2FBT）, was used as the active material to fabricate large-area （7 cm2） solar cells by a slot-die coating process. The power conversion efficiency （PCE） could reach 1.87% initially and further increased to 3.04% by thermal annealing. Compared to the performance of reference cell on ITO substrate, the result indicated that the AgNWs could be developed as an alternative substitute of conductive electrode to fabricate the large-area flexible OSCs by roll-to-roll printing.

关键词： Polymer solar cell Silver nanowires Slot-die Large area flexible substrate

Highly transmitted silver nanowires-SWCNTs conductive flexible film by nested density structure and aluminum-doped zinc oxide capping layer for flexible amorphous silicon solar cells

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Journal of Materials Science & Technology 2022年第31期126卷 152-160页

作者： Shunliang Gao Xiaohui Zhao Qi Fu Tianchi Zhang Jun Zhu Fuhua Hou Jian Ni Chengjun Zhu Tiantian Li Yanlai Wang Vignesh Murugadoss Gaber A.M.Mersal Mohamed M.Ibrahim Zeinhom M.El-Bahy Mina Huang Zhanhu Guo The Key Laboratory of Semiconductor Photovoltaic Technology at Universities of Inner Mongolia Autonomous Region College of Physical Science and TechnologyInner Mongolia UniversityHohhot 010021China Department of Electronic Science and Technology School of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China Advanced Materials Division Engineered Multifunctional Composites(EMC)Nanotech LLCKnoxvilleTN 37934United States Integrated Composites Laboratory(ICL) Department of Chemical and Bimolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996United States Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Indium tin oxide(ITO)is widely used in transparent conductive films(TCFs);however,several disadvan-tages,such as high cost and toxicity of indium,limit its ***,it is necessary to develop other materials that can replace *** nanowires or single walled carbon nanotubes(SWCNTs)have attracted considerable interest owing to their unique electrical,optical,and thermal stabilities,and thus,they are ideal for transparent electrodes for flexible or stretchable *** this study,we develop a novel architecture of composite TCFs on a polyethylene naphthalate(PEN)flexible ***,the silver nanowires-SWCNTs films with nested density structure were fabricated through ultrasonic spraying technology by varying the spraying *** achieving enhanced transmittance,we combined the larger irregular grids and holes with fewer nanowires stacked in the longitudinal direction,more optical chan-nels,and good carrier ***,aluminum-doped zinc oxide(AZO)was used as capping to the structure for enhancing the optical properties of the *** silver nanowires-SWCNTs/AZO(ASA)bilayer was obtained in the optimized architecture,which showed superior optoelectronic performance to that shown by commercial ITO with a high optical transmittance of 92%at the wavelength of 550 nm and low sheet resistance of 17/*** the specially structured conductive film,the significant improvement in the transmittance and uniformity of the sheet resistance was attributed to the effective nanowire junc-tion contact compared to that in ordinary structure of silver nanowires,which reduced the mean density of small clusters of *** with the silver nanowires-SWCNTs films,the ASA bilayer film exhibited excellent resistance to boiling,mechanical bending(10,000 cycles),and CO_(2)***,the sheet resistance of ASA changed slightly after the tape tests,thereby illustrating a strong adhesion to the PEN substrate after the enclosure of ***

关键词： Silver nanowires-SWCNTs Nested density TCFs flexible substrate Photovoltaic devices

flexible perovskite solar cells based on green,continuous roll-to-roll printing technology

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Journal of Energy Chemistry 2018年第4期27卷 971-989页

作者： Wei Zi Zhiwen Jin Shengzhong Liu Baomin Xu Energy-saving Building Materials Innovative Collaboration Center of Henan Province.Xinyang Normal University Xinyang 464000HenanChina Department of Materials Science and Engineering.Southern University of Science and Technology Shenzhen 518055GuangdongChina Dalian Institute of Chemical Physics.Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023.LiaoningChina Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Engineering Lab for Advanced Energy TednologySchool of Materials Science and EngineeringShaanxi Normal University.Xi'an 710119ShaanxiChina

By designing and fabricating thin film electronic devices on a flexible substrate instead of more commonly used rigid substrate, flexible electronics produced has opened a field of special applications. In this article, we first reviewed available products that may be used as flexible substrates, their characteristics and unique advantages as supporting material for flexible electronic devices. Secondly, flexible perovskite solar cell is examined in detail, with special focus on its potential large-scale fabrication processes. In particular, a comprehensive review is provided on low cost solution printing techniques that is viewed highly as a viable tool for potential commercialization of the perovskite solar cells. Furthermore, a summary is given on green processing for the solution printing production of flexible perovskite devices.

关键词： flexible substrate Perovskite solar cell Doctor blading Slot-die coating Inkier printing

Metal-film-assisted ultra-clean transfer of single-walled carbon nanotubes

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Nano Research 2014年第7期7卷 981-989页

作者： Yujun He Dongqi Li Tianyi Li Xiaoyang Lin Jin Zhang Yang Wei Peng Liu Lina Zhang Jiaping Wang Qunqing Li Shoushan Fan Kaili Jiang State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics & Tsinghua-Foxconn Nanotechnology ResearchCenter Tsinghua University Beijing 100084 China

Transfer printing of nanomaterials onto target substrates has been widely used in the fabrication of nanodevices, but it remains a challenge to fully avoid contamination introduced in the transfer process. Here we report a metal-film- assisted method to realize an ultra-clean transfer of single-walled carbon nanotubes （SWCNTs） mediated by poly（methyl methacrylate）（PMMA）. The amount of PMMA residue can be greatly reduced due to its strong physical adhesion to the metal film, leading to ultra-clean surfaces of both the SWCNTs and the substrates. This metal-film-assisted transfer method is efficient, nondestructive, and scalable. It is also suitable for the transfer of graphene and other nanostructures. Furthermore, the relatively low temperature employed allows this technique to be compatible with nanomaterial-based flexible electronics.

关键词： metal-film-assisted single-walled carbonnanotube transfer flexible substrate Schottky barrier

High performance sandwich structured Si thin film anodes with LiPON coating

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Frontiers of Materials Science 2018年第2期12卷 147-155页

作者： Xinyi LUO Jialiang LANG Shasha LV Zhengcao LI State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The sandwich structured silicon thin film anodes with lithium phosphorus oxynitride （LiPON） coating are synthesized via the radio frequency magnetron sputtering method, whereas the thicknesses of both layers are in the nanometer range, i.e. between 50 and 200 nm. In this sandwich structure, the separator simultaneously functions as a flexible substrate, while the LiPON layer is regarded as a protective layer. This sandwich structure combines the advantages of flexible substrate, which can help silicon release the compressive stress, and the LiPON coating, which can provide a stable artificial solid- electrolyte interphase （SEI） film on the electrode. As a result, the silicon anodes are protected well, and the cells exhibit high reversible capacity, excellent cycling stability and good rate capability. All the results demonstrate that this sandwich structure can be a promising option for high performance Si thin film lithium ion batteries.

关键词： sandwich anode LiPON coating flexible substrate silicon anode

Influence of Argon Gas Pressure on the ZnO:Al Films Deposited on flexible TPT substrates at Room Temperature by Magnetron Sputtering

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Journal of Wuhan University of Technology(Materials Science) 2011年第1期26卷 52-55页

作者：王晓晶周文利 Department of Electronics Science & Technology Huazhong University of Science & Technology Hubei PV Center of Engineering&Technology

Aluminium doped ZnO thin films（ZnO︰Al） were deposited on transparent polymer substrates at room temperature by rf magnetron sputtering method from a ZnO target with Al2O3 of 2.0 wt%. Argon gas pressure varied from 0.5 Pa to 2.5 Pa with radio frequency power of 120 W. XRD results showed that all the ZnO︰Al films had a polycrystalline hexagonal structure and a （002） preferred orientation with the c-axis perpendicular to the substrate. The grain sizes of the films were 6.3-14.8 *** images indicated the ZnO︰Al film with low Argon gas pressure was denser and the deposition rate of the films depended strongly on the Argon gas pressure, increasing firstly and then decreasing with increasing the pressure. The highest deposition rate was 5.2 nm/min at 1 Pa. The optical transmittance of the ZnO︰Al films increased and the blue shift of the absorption edge appeared when the Argon gas pressure increased. The highest transmittance of obtained ZnO︰Al films at 2.5 Pa was about 85% in the visible region. The electrical properties of the films were worsened with the increase of the Argon gas power from 1 Pa to 2.5 Pa. The resistivity of obtained film at 1.0 Pa was 2.79×10-2 Ω·cm.

关键词： Al-doped ZnO (ZnO︰Al) flexible substrate magnetron sputtering argon gas pressure structure and properties