MATERIALS & DESIGN
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2023
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IF 8.4
Shuang Xiong,Dalei Wang,Hangkai Qiu,Tao He,Chao Wang,Yueyue Wang,Chaoqing Dai,Wei Liu
The overuse of mixed pesticides poses a threat to both the ecosystem and human health, yet general pesticide detection methods are complex in terms of steps, such as the need for pretreatment and cleaning. Surface-enhanced Raman scattering (SERS) has been used for real-life trace detection of residues due to its rapid detection and ultra-high sensitivity. Here, we prepared a novel Ti 3 C 2 Tx (MXene)-noble metal hybrid flexible substrate with a layer of MXene on top of flower-like Ag nanoparticles (AgNFs), and finally grew Au nanoparticles (AuNPs) by galvanic replacement and self-reduction reactions. The limit of detection (LOD) can be as low as 2 × 10 -12 M by detecting 4-mercaptobenzoic acid (4MBA). For efficient sampling, transparent and flexible platform made of polydimethylsiloxane (PDMS) were used for the extraction and detection of thiabendazole (TBZ), thiram, methyl parathion (MP) and their mixtures. Notably, the lowest concentrations detected by swabbing on the tomato surface (3.7 ng/mL, 2.8 ng/mL) were lower than the EU maximum permissible limits of pesticides on raw fruits and vegetables (4.0 mg/L, 6.33 mg/mL). This high performance Ti 3 C 2 Tx-noble metal hybrid flexible substrate offers a great advantage in the trace detection of molecules.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 7
·5802-5812
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IF 2.993
Zheng Boda,Zhu Qingsheng,Zhao Yang
In this work, we reported a facile approach to fabricate silver nanowire (AgNW) networks on flexible substrates. Through immersing the modified poly (ethylene terephthalate) with positively charged functional group into the AgNW dispersion with anionic dispersant, a flexible AgNW transparent conductive film was formed by electrostatic adsorption self-assembly process. Even without a post-treatment process, the as-prepared flexible AgNW films exhibited excellent optoelectrical property, low surface roughness and high reliability. It was shown that the insulating dispersant on AgNWs could be effectively removed by an ion bombardment method and then greatly decreased the sheet resistance of AgNW networks. Because of the nature of spontaneous adsorption, this preparation method can be suitable for an arbitrary shaped substrate, which will broaden the application of AgNW conductive films in optoelectronic devices.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2020
·Vol. 32
·期 23
·2001082
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IF 27.398
Ye Zhang,Pu Huang,Jia Guo,Rongchao Shi,Weichun Huang,Zhe Shi,Leiming Wu,Feng Zhang,Lingfeng Gao,Chao Li,Xiuwen Zhang,Jialiang Xu,Han Zhang
Graphdiyne (GDY), a newly emerging 2D carbon allotrope, has been widely explored in various fields owing to its outstanding electronic properties such as the intrinsic bandgap and high carrier mobility. Herein, GDY-based photoelectrochemical-type photodetection is realized by spin-coating ultrathin GDY nanosheets onto flexible poly(ethylene terephthalate) (PET) substrates. The GDY-based photodetectors (PDs) demonstrate excellent photo-responsive behaviors with high photocurrent ( P ph , 5.98 µA cm - 2 ), photoresponsivity ( R ph , 1086.96 µA W - 1 ), detectivity (7.31 × 10 10 Jones), and excellent long-term stability (more than 1 month). More importantly, the PDs maintain an excellent P ph after 1000 cycles of bending (4.45 µA cm - 2 ) and twisting (3.85 µA cm - 2 ), thanks to the great flexibility of the GDY structure that is compatible with the flexible PET substrate. Density functional theory (DFT) calculations are adopted to explore the electronic characteristics of GDY, which provides evidence for the performance enhancement of GDY in alkaline electrolyte. In this way, the GDY-based flexible PDs can enrich the fundamental study of GDY and pave the way for the exploration of GDY heterojunction-based photodetection.
研究领域:
材料科学
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电子工程
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理论计算
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 138
·期 6
·49806
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IF 2.52
Dexin Chen,Zhixin Kang,Wei Li
Here, thin Ag films with excellent properties were successfully prepared on flexible substrates through surface grafting and assembling followed by simple spray-assisted deposition process. The constructed molecule brushes provide the interfacial adhesion for Ag layers onto polymer substrates. The mechanical and electrical properties of the conductive Ag coated PET could be tuned by changing the spraying passes. As the electromagnetic interference shielding material, the composite PET possesses a highest shielding efficiency of 45 dB. In addition, the Ag coated PET with the thickness of 0.1 mm would maintain the 72% electrical conductivity even been folded even at a minimum diameter of 0.2 mm. It was demonstrated that uniform and fine cracks would generate when the Ag coated PET was stretching, but Ag films still retain continuous networks to maintain the high electronic conductivity even stretching to 100%. Simple finite element modeling results prove that the stress by stretching would concentrate in corner of the crack and the deformation is mainly at stress side. The Ag layers were also produced on TPU substrates to detect the stretching, showing its potential applications for strain sensors and health monitoring systems.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Lei Yang,Jieyu Song,Taolin Song,Yifeng Shen,Wenbo Li,Qing Zhou,He Zhu
Anti-reflection coating (ARC) materials are of great fundamental scientific importance but suffer from many problems, such as cumbersome and time-consuming fabrication processes, poor durability, and use of organic solvents . Herein, the preparation of ARCs is realized through a facile evaporation process of a latex blend containing crosslinked polymethyl methacrylate (cPMMA), non-crosslinked polybutyl acrylate (PBA) and ammonium bicarbonate (NH 4 HCO 3 ). The cPMMA particles act as building blocks for constructing the porous coating skeleton, the PBA particles work as binders to ensure the durable structural flexibility, and NH 4 HCO 3 is used to trigger the aggregation of the particles during latex drying and control the porous structure . This novel method is straightforward, easy to operate and cost-effective, and NH 4 HCO 3 can be removed through thermal decomposition at temperatures no more than 100 °C, thus avoiding the use of any solvents. Moreover, the refractive indices and the thicknesses of the coatings can be modulated by the concentration of NH 4 HCO 3 and the particle fraction of the coating dispersions, respectively. These characteristics allow the coatings with low transmittance loss of less than 0.5% as transmitted peaks spanning from 440 to 750 nm. When applied to flexible substrates , including colored flat sheets and black silk fabric, the light penetrating into the substance is promoted and selectively absorbed by the colorants , leading to a significant increase in the color depth. Finally, the coating exhibited excellent durability with extremely low transmittance drop of 0.3% even after 20 cycles of 180° bending and relaxation of the coated sheet.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Advanced Fiber Materials
·
2023
·Vol. 5
·期 4
·1392-1403
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IF 16.1
Ma Chao,Wang Meng,Wang Kai,Uzabakiriho Pierre Claver,Chen Xi,Zhao Gang
High-performance wearable sensors that detect complex, multidimensional signals are indispensable in practical applications. Most existing sensors can only detect axial deformations or single stimuli, dramatically limiting their application fields. In this study, anisotropic strain and deformation-insensitive pressure sensors were effectively constructed based on a rigid-flexible synergistic stretchable substrate. Furthermore, we developed a three-dimensional integrated sensor with highly directional selective sensing through reasonable design and assembly. This integrated sensor recognizes the amplitude and direction of strain in the plane with a maximum gauge factor of 635 and an unprecedented selectivity of 13.99. Additionally, this device can also monitor the pressure outside the plane with a sensitivity of 0.277 kPa −1 . We further investigated the working mechanism of sensor anisotropy and confirmed the application of the sensor in detecting complex multifreedom human joint movements. This research discovery provides new ideas and methods for developing multidimensional sensors, which is essential for broadening the application field of wearable electronic products. Graphical Abstract
研究领域:
材料科学
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传感器技术
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生物医学工程
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产品关联
DOI
高影响因子
Nanoscale Research Letters
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2016
·Vol. 11
·期 1
·1-8
·
IF 2.584
Ding Jin,Liu Jun,Tian Qingyong,Wu Zhaohui,Yao Weijing,Dai Zhigao,Liu Li,Wu Wei
A facile one-step polyol method is employed to synthesize the Ag nanoparticles (NPs) in large scale. The Ag NPs with different average diameter (from 52 to 120 nm) and particle size distribution are prepared by changing the mass ratio of AgNO 3 and PVP. Furthermore, the as-obtained Ag NPs are prepared as conductive inks, which could be screen printed on various flexible substrates and formed as conductive patterns after sintering treatment. During the reaction process, PVP is used as the capping reagent for preventing the agglomeration of Ag NPs, and the influence of the mass ratio of AgNO 3 and PVP to the size distribution of Ag NPs is investigated. The results of electronic properties reveal that the conductivity of printed patterns is highly dependent on the size distribution of as-obtained Ag NPs. Among all the samples, the optimal conductivity is obtained when the mass ratio of AgNO 3 and PVP is 1:0.4. Subsequently, the sintering time and temperature are further investigated for obtaining the best conductivity; the optimal electrical resistivity value of 3.83 μΩ · cm is achieved at 160 °C for 75 min, which is close to the resistivity value of the bulk silver (1.58 μΩ · cm). Significantly, there are many potential advantages in printed electronics applications because of the as-synthesized Ag NPs with a low sintering temperature and low electrical resistivity.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Hongyuan He,Jiebin Du,Zhangzhao Weng,Changxiang Fan,Luo Xicai,Zhixin Kang,Dexin Chen
Superhydrophobic surfaces were fabricated by a simple one-step electrodeposition technique to deposit three distinct micro/nano hierarchical structures of Ce, Mg, or Cu-based compounds on Ag films on a flexible polymer substrate. Scanning electron microscopy was used to examine the surface morphologies of obtained structures with different deposition. Compared with the bare Ag films, one-step electrodeposition process resulted in superhydrophobicity, including a water contact angle of 159.7° for Ce-modified surfaces, 157.0° for Mg-modified surfaces, and 153.8° for Cu-modified surfaces. Besides, these surfaces showed high thermal stability below 120 ℃, and good flexibility but low electrical conductivity . EDS and XPS results suggest the production of low surface energy materials that formed the superhydrophobic features on the Ag films. Besides, because of the formation of CeO 2 , Ce-SHS had better superhydrophobicity than Mg-SHS and Cu-SHS. In addition, the potentiodynamic polarization experiments showed that the electrodeposited superhydrophobic surfaces had lower I corr , higher E corr and impedance values in NaCl solution, Na 2 SO 4 solution and Simulated body fluid, and artificial sweat solution compared with the bare silver film, indicating that the electrodeposited protective film has good anti-corrosion properties. These results suggest that the one-step electrodeposition method is a promising strategy to fabricate conducting films with superhydrophobic surfaces for surface protection under various corrosive environments.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2023
·Vol. 9
·期 12
·2300469
·
IF 6.2
Hao Dong,Wenxin Liu,Yi Li,Xing Chen,Di Wang
Metal oxide materials are widely adopted in UV sensing due to their advantages of reliability, stability, and high sensitivity. However, the fabrication of metal oxide films on flexible substrates using micro/nano printing techniques still poses challenges. Notably, inks containing oxide nanoparticles often lead to nozzle clogging during the printing process. In addition, methods relying on precursor solutions typically require high post-processing temperatures that conventional flexible substrates cannot withstand. In this study, a novel precursor ink based on zinc amine hydroxide complexes is proposed, enabling post-processing at a low temperature of 250 °C. Through a fully printed approach, a wearable UV sensor based on a zinc oxide nanofilm on a flexible substrate is successfully fabricated. The sensor exhibits outstanding sensitivity and rapid response characteristics. By incorporating silver nanoparticles into the ink, the baseline resistance of the sensitive material is adjusted. Furthermore, a smart patch utilizing the NFC communication protocol is developed, allowing for wireless, passive, and wearable UV detection. In this study, a process paradigm for fabricating metal oxide films on flexible substrates using micro/nano printing techniques is introduced, showcasing significant potential in the field of micro/nano sensor fabrication.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Zhiyuan Chen,Peipei Han,Wenhui Chen,Zhi Wan,Jizhou Yang,Zhigang Liu,Peng Hu,Feng Teng,Haibo Fan
In recent years, Ga2O3 flexible solar-blind ultraviolet photodetectors (UVPDs) are gradually becoming the focus of research and the industry because of their excellent wearability, low manufacturing cost, portability, large area compatibility, and high scalability. However, the crystallization temperature required for high-quality α-phase Ga2O3 films exceeds the heat resistance of most flexible materials, so the growth of Ga2O3 films on flexible substrates is a very big challenge. In this study, a highly ordered α-Ga2O3 nanorod array and flexible solar-blind UV PDs with excellent performance were successfully prepared on a flexible titanium (Ti) substrate at 500 °C by a simple water bath heating method. When irradiated by 254 nm ultraviolet light, the α-phase Ga2O3 flexible photodetector exhibits an excellent self-power optical response at 0 V bias and exhibits excellent photoelectric performance with a responsivity of 15.3 mA/W, a fast rise and fall time of 0.104 and 0.077 s, a photocurrent density of 45.7 μA/cm2, and a high detectivity of 13.8 × 109 Jones. Bending and repeating experiments demonstrated that the detector had high stability. This study provides a simpler and less expensive method for the preparation of flexible self-powered α-Ga2O3 solar-blind UV photodetectors.
研究领域:
材料科学
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光电子学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Chuanyun Yang,Jiping Shi,Zhishuai Wang,Haiquan Xie,Lu Ruan
One potential sustainable energy conversion technique is the photocatalytic reduction of CO 2 by semiconductors. However, insufficient active sites and low utilization efficiency of solar energy lead to the unsatisfactory effect of photothermal catalytic reduction of CO 2 . Thus, in this study, leaf-like CuInS 2 micro-nano structures are prepared on three-dimensional flexible substrate by one-step hydrothermal method to improve the photothermal CO 2 reduction efficiency. Among them, the preparation process of hydrothermal method is simple, energy-saving and efficient. In addition, micro-nano structures can not only provide more active sites for photocatalysts due to their large specific surface area, but also form more pores that can promote electron transfer efficiency. Meanwhile, the introduction of sulfur vacancy can promote the separation of photogenerated carriers and improve the adsorption capacity of CO 2 . As a result, the yields of CO 2 reduction to CO and CH 4 by leaf-like CuInS 2 micro-nano structures were 1285.2 μmol/m 2 /h and 231.4 μmol/m 2 /h, respectively, under the synergistic action of photothermal. At present, there are few reports about the preparation of CuInS 2 micro-nano structures in flexible stainless steel mesh, which also provides a new idea for the design of efficient photothermal cocatalysts.
研究领域:
材料科学
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能源化学
·
环境科学
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DOI
高影响因子
Applied Nanoscience
·
2019
·Vol. 9
·期 8
·1971-1979
·
IF 3.198
Gu Ze-Zeng,Tian Ying,Geng Hong-Zhang,Rhen Danielle S.,Ethiraj Anita Sagadevan,Zhang Xingcai,Jing Li-Chao,Wang Tao,Xu Zi-Han,Yuan Xiao-Tong
Carbon nanotubes (CNTs) and poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) were employed to prepare sandwich-structured CNT/PEDOT:PSS/CNT transparent conductive films (TCFs) on flexible polyethylene terephthalate (PET) substrate by a spraying method. Based on the film morphology, we suggest that the CNTs were embedded in PEDOT:PSS. The structured film was more stable and did not peel off during post-processing nitric acid treatment. Ethylene glycol (EG) was used to improve the conductivity of the film, and the best ratio of PEDOT:PSS to EG was 10:5. XPS and Raman spectroscopy studies revealed that the non-conductive sodium dodecylbenzene sulfonate and PSS were removed during the nitric acid treatment. TCF sheet resistance as low as 95.15 Ω/sq at 87.72% transmittance (at a wavelength of 550 nm) was obtained. When the CNT/PEDOT:PSS/CNT-TCF was used as an anode in an organic light emitting diode, the high luminance of the device was 1598 cd/cm 2 at 14 V, and the maximum current efficiency was 1.5 cd/A at 13 V.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
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