COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Hao Sun,Shuang Xiong,Baolong Shi,Yimin Zhou,Changwei Bi,Jitao Li,Lili Li,Bin Liu,Chaoqing Dai,Yueyue Wang,Chao Wang,Dalei Wang,Wei Liu
Given the health and environmental risks associated with pesticide misuse, achieving zero pesticide residues is pivotal in Agriculture 4.0. Traditional detection methods such as HPLC and GC-MS are both complex and time-consuming. In contrast, surface-enhanced Raman scattering (SERS) offers rapid detection and high sensitivity, aligning with the efficiency and accuracy requirements of Agriculture 4.0. In this study, we developed a high-performance flexible substrate using a simple chemical synthesis method. We used material adsorption, anisotropic charge attraction and electron migration to facilitate the growth of the substrate material, which promoted more 'hot spots' and electron transfer , and continued optimisation of the preparation process, which resulted in a significant increase in spectral intensity. The substrate demonstrated outstanding detection capability, with a detection limit of 10 −15 M for thiabendazole (TBZ). In practical fruit testing, TBZ residue concentrations on the surface of American cherries could be detected as low as 10 −8 mg/mL, well below China's prescribed limit of 5 mg/kg. Relative to previous work in the field of pesticide detection, our study has lower detection limits and concentrations, as well as lower cost and simpler preparation, which provide more options for the detection of very low concentrations of hazardous substances. At the same time, it was confirmed that SERS is consistent with the zero pesticide residue goal of Agriculture 4.0, demonstrating practical efficacy and accuracy within this framework.
研究领域:
分析化学
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环境科学
·
农业科学
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产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 11
·1733
·
IF 5.3
Pei Zeng,Mengjie Zheng,Hao Chen,Guanying Chen,Zhiwen Shu,Lei Chen,Huikang Liang,Yuting Zhou,Qian Zhao,Huigao Duan
Seeking sensitive, large-scale, and low-cost substrates is highly important for practical applications of surface-enhanced Raman scattering (SERS) technology. Noble metallic plasmonic nanostructures with dense hot spots are considered an effective construction to enable sensitive, uniform, and stable SERS performance and thus have attracted wide attention in recent years. In this work, we reported a simple fabrication method to achieve wafer-scale ultradense tilted and staggered plasmonic metallic nanopillars filled with numerous nanogaps (hot spots). By adjusting the etching time of the PMMA (polymethyl methacrylate) layer, the optimal SERS substrate with the densest metallic nanopillars was obtained, which possessed a detection limit down to 10−13M by using crystal violet as the detected molecules and exhibited excellent reproducibility and long-term stability. Furthermore, the proposed fabrication approach was further used to prepare flexible substrates; for example, a SERS flexible substrate was proven to be an ideal platform for analyzing low-concentration pesticide residues on curved fruit surfaces with significantly enhanced sensitivity. This type of SERS substrate possesses potential in real-life applications as low-cost and high-performance sensors.Keywords:SERS;hot spots;large-scale production;sensitivity;flexible substrate
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 12
·125302
·
IF 3.551
Cheng Zhou,Xiaoshuang Zhang,Ning Tang,Ye Fang,Hainan Zhang,Xuexin Duan
Development of wearable devices for continuous respiration monitoring is of great importance for evaluating human health. Here, we propose a new strategy to achieve rapid respiration response by confining conductive polymers into 1D nanowires which facilitates the water molecules absorption/desorption and maximizes the sensor response to moisture. The nanowires arrays were fabricated through a low-cost nanoscale printing approach on flexible substrate. The nanoscale humidity sensor shows a high sensitivity (5.46%) and ultrafast response (0.63 s) when changing humidity between 0% and 13% and can tolerate 1000 repetitions of bending to a curvature radius of 10 mm without influencing its performance. Benefited by its fast response and low power assumption, the humidity sensor was demonstrated to monitor human respiration in real time. Different respiration patterns including normal, fast and deep respiration can be distinguished accurately.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Yanchun Hu,Ying Tang,Zuhong Zhang,Feng Yang,Lulu Jiang,Yunjuan Song,Hairui Liu
Inverted Perovskite Solar Cells (PSCs) with Poly (3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT:PSS) as hole transport layer on account of its low-temperature solution processability, good flexibility and good film forming ability. Bis(acetylacetonato)dioxomolybdenum(VI) [CH 3 COCH = (O-)CH 3 ] 2 MoO 2 (BADM) as an effective dopant has been introduced into PEDOT:PSS for planar PSCs. The results show that the power conversion efficiency (PCE) is increased from 14.26% to 17.11% by using BADM to modify PEDOT:PSS, which is mainly due to the increase of filling factor and short circuit current density. Not only that, BADM doping can also improve the extensibility of perovskite film, which can be reflected on flexible substrate, when slightly bending, there are almost no cracks.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
·
IF 3.764
Ling Liu,Pengxiang Yu,Mingyuan Wu,Qingyun Wu,Jiuyi Liu,Jianjun Yang,Jianan Zhang
The individually dispersed multiwalled carbon nanotubes (MWCNTs) enable the comprehensive accomplishment of intrinsic electrical conductivity, thermal conductivity, and antielectromagnetic shielding characteristics. However, the design of an aqueous carbon nanotube (CNT) dispersant remains a significant challenge in rational balances of strong interfacial interactions between CNT/dispersant and water medium. In the current research, biomass tannic acid (TA) was selected as the building block to synthesize poly(tannin urethane) (PTU) by step polymerization of TA and toluene diisocyanate, which was examined as a novel dispersant for MWCNTs. A highly homogeneous dispersion of PTU-stabilized MWCNTs and carbon black (CB) was prepared by a simple sonification and homogenization process to form aqueous antistatic additives. Furthermore, the antistatic coating for a flexible poly(vinyl chloride) (PVC) substrate was prepared by a dip-coating method using self-made waterborne polyurethane (WPU) as a binder. The results demonstrated that the aggregates of MWCNTs were successfully debundled into individually dispersed nanotubes by taking advantage of the high π–π interaction between MWCNTs and PTU. Compared with the chemical modification, the physically stabilized MWCNTs displayed fewer defects (ID/IG ∼ 0.853). Compared with the pure WPU coating, the sheet resistivity of the MWCNTs/CB/PTU/WPU coating decreased sharply from 1016 to 108 Ω at 0.5 wt % loading of MWCNTs, which met the requirement of antistatic applications. With further increase of the MWCNT content, the MWCNTs/CB/PTU/WPU coatings exhibited continually decreasing sheet resistivity and reached remarkably low surface resistance of 104 Ω at 2.0 wt % loading of MWCNTs, which was realized by the formation of conducting networks of synergistic MWCNTs and CB-induced low percolation threshold. The facile one-pot preparation of biobased PTU and simple production of MWCNT dispersion promise an ideal additive for antistatic and conductive-related applications, especially for flexible substrates.
研究领域:
材料科学
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化学工程
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纳米技术
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2021
·Vol. 7
·期 6
·2101169
·
IF 7.848
Wei Liu,Xue Wang,Zhiyang Zhao,Xin Zhou,Shiliang Huang,Longjin Huang,Zihan Wang,Jingru Li,Junjie Fu,Yu Liu,Sheng Cui,Xuan He
Flexible surface-enhanced Raman spectroscopy (SERS) substrates have received more and more attention for their non-invasive sample collection ability. However, majority of them have poor stability and reproducibility because noble metal is easily oxidized and led to lose SERS activity. Herein, SiO 2 -TiO 2 -Ag hybrids aerogel (STAHA) material is first applied as a flexible SERS substrate for explosives and dyes long-term sensitive detection. The sensitive non-invasive detection of 3-nitro-1, 2, 4-triazol-5-one (NTO) residues can be achieved with a limit of 1 × 10 −6 m by wiping sample collection method. Meanwhile, similar SERS sensitivity from long-term (50 days) kept substrates is observed compared with fresh-made substrates. This long-term sensitivity is contributed to electronic transfer compensation from TiO 2 aerogel. This proposed flexible STAHA enrich the type of SERS substrates, and their long-term sensitivity can provide a prospective application for trace analyses of explosives and other hazardous residues in criminal forensic, military, and security check.
研究领域:
材料科学
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分析化学
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环境安全
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2025
·Vol. 17
·期 8
·1884-1891
·
IF 2.6
Hongjun Wang,Ziyang Bian,Yue Wang,Huijuan Niu,Zhenshan Yang,Hefu Li
Ensuring food safety necessitates rapid identification of pesticide residues on fruits. Herein, we developed a shape-adaptable flexible surface-enhanced Raman scattering (SERS) substrate, combined with a deep learning algorithm, to quickly detect and quantitatively analyze thiram on fruit surfaces. This SERS substrate was fabricated by depositing silver nanoparticles (Ag NPs) onto a thin, corrugated polydimethylsiloxane (PDMS) film. This innovative design improves physical flexibility, ensuring conformal contact with curved surfaces while achieving high sensitivity, reproducibility, and mechanical robustness. The corrugated Ag NPs@PDMS thin film was able to directly detect thiram at concentrations as low as 10−7 M on tomato and blueberry peels, exhibiting consistent SERS activity with small interference from the fruit's shape. Furthermore, we developed a one-dimensional convolutional neural network (1D CNN) model, trained using a dataset of SERS signals from thiram, for quantitative analysis. The developed model achieved high prediction accuracy, with a coefficient of determination (R2) of 0.9905 and a root mean square error (RMSE) of 0.1364. The integration of our flexible SERS substrate, which adapts well to irregular surfaces, with the 1D CNN algorithm for quantitative analysis, holds great potential for rapid thiram detection in fruits.
研究领域:
食品安全
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分析化学
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人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Peilin Cui,Yunxie Huang,Runkeng Liu,Dinghua Hu,Huiying Wu,Zhenyu Liu
The development of flexible electronics needs efficient cooling devices. The porous wick, the key component in a heat pipe (HP) and vapor chamber (VC), is generally fabricated by sintering copper particles at high temperatures (>1000 °C), which makes it only formed on an inflexible substrate. In this work, one three-tier hierarchical porous structure (mesocrack, micropore, and nanopapillae) was fabricated via a low-temperature sintering method based on the utilization of self-reducing metal precursors (∼300 °C), which can be used as a flexible porous wick. The mesocrack, acting as the main water flow channel, efficiently decreases the flow resistance. The micropore, covered with densely distributed spore-like nanopapillae, creates a heterogeneous wetting surface. By harnessing the synergistic effect of hydrophobic drag reduction and hydrophilic driving force enhancement, the capillary performance is significantly improved. The obtained wick on the flexible substrate can overcome the dilemma between diminishing viscous resistance and strengthening capillary force at different length scales. It can achieve an ultimate wicking coefficient of 7.132 mm/s0.5, representing an enhancement of 9.1% compared to the best micro/nano wick structure in the previous works. Moreover, for the flexible light-emitting diode, the passive cooling approach utilizing the fluid transport and evaporation within the porous structure fabricated in this study, in comparison to the natural cooling, achieved a temperature decrease of 35.9 °C, resulting in a cooling effect of up to 35.1%. The proposed method resolves the challenge of fabricating a porous wick for flexible HP and VC, and it will open up a way for the cooling technique of flexible electronics.
研究领域:
材料科学
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热管理
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柔性电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yupeng Sun,Kaihui Zhou,Yuxin Wang,Ye Lin,Weiran Wang,Xue Xiong,Xiangru Zhao,Huinan Cui,Min Liang,Qiao Wang,Shengnan Yang,Li Li
Rapid, low-cost, and in-situ detection of illegal residues on aquatic product surfaces remains a significant challenge. Herein, we developed a versatile surface-enhanced Raman scattering (SERS) sensor by integrating instant interfacial self-assembled silver nanostar film onto flexible polytetrafluoroethylene filter membrane (AgNS/PTFE) for sensitive detection of malachite green (MG) and crystal violet (CV) in crayfish. The entire process, from room-temperature substrate preparation to detection completion, takes less than 20 min. The AgNS/PTFE flexible substrate not only provides excellent hydrophobicity for signal enhancement with minimal sample volumes (2 μL) but also ensures good uniformity, resulting in a homogeneous and dense distribution of SERS-active hot spots with superior anti-interference properties and mechanical durability. By simple “drop/wipe” operations and data visualization treatment, this method achieved detection limits as low as 10 pg/mL for MG and 7 pg/mL for CV, with in-situ analysis in spiked and actual crayfish samples, demonstrating significant potential for food safety applications.
研究领域:
食品安全
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 6
·期 2
·213-218
·
IF 5.256
Qi Lei,Jiankang He,Bing Zhang,Jinke Chang,Dichen Li
Electrohydrodynamic (EHD) printing is a promising approach to fabricate high-resolution features with low cost and high efficiency. However, the existing EHD printing explorations based on nanoparticle inks commonly require high post-treatment temperature (>150 °C) to achieve desired conductivity, which limits their application in flexible substrates like polymers. Here an EHD printing strategy based on in situ reactive inks is presented to fabricate microscale conductive silver features with tunable resistance on various flexible substrates at mild temperature. The width of the EHD printed features can be flexibly tuned by process parameters, while the resistance can be tuned by the number of printing layers. The printed feature has the smallest size of 27.6 ± 3.4 μm and exhibits an electrical conductivity of 3.3 × 106 S m−1. The capability to electrohydrodynamically print microscale conductive features on various flexible substrates was finally demonstrated.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Yaguo Cai,Xuejiao Yao,Xianqing Piao,Zhejuan Zhang,Er Nie,Zhuo Sun
A facile synthesis method was developed to prepare the particle-free silver organic conductive ink, which contains silver-amide complex dispersed in glycol. Electrical and morphological characterizations were carried out to assess the performance of the ink. The patterns printed by a commercial inkjet printer (Epson R230) were treated at different temperatures and time to optimize the electrical and adhesion properties. The film sintered at 140 °C for 40 min showed a low electrical resistivity (about 5 μΩ∙cm) owing to the transformation of point contact to surface contact. These good performances indicated a penitential application in flexible electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Xin-ping Wang,Jingwei Hou,Fu-shan Chen,Xiang-min Meng
Metal-organic frameworks (MOFs), being a type of the most representative porous nanomaterials, have been regarded as a promising candidate to fabricate antibacterial separation membrane attributing to their high porosity, tunable pore size and chemical functionality. Comparing with the traditional blending techniques, depositing a continuous and coherent MOF crystal layer on top of the membrane can fully exploit the functionality of the materials. In this study, we constructed a continuous zeolite imidazole framework-8 (ZIF-8) crystal layer on the surface of flexible polysulfone (PS) membrane pre-modified by polydopamine (PDA) via a facile immersion strategy. The characterization results confirmed the formation of a continuous ZIF-8 coating layer, which significantly increases the roughness of composite membrane from 17.2 nm to 154.0 nm compared with PDA/PS substrates. The ZIF-8 layer deposited on the surface of the PDA/PS membrane reduced the contact angle value from 45.4° to 38.6° based on the properties of Janus membrane. As a result, the ZIF-8/PDA/PS composite membranes showed a high water flux of 9.6 L/m 2 ·h and a low solute reverse flux of 3.8 g/m 2 ·h using 1 M MgCl 2 as draw solution and DI water as feed solution under forward osmosis mode. In addition, the composite membranes also exhibited a satisfactory antimicrobial performance against Escherichia coli ( E. coli ) with antibacterial efficiency almost 99%, which is much higher than PDA/PS membrane (64%). This work demonstrates a facile way to ZIF-8/PDA/PS composite membranes with good FO performance and excellent antibacterial capacities.
研究领域:
材料科学
·
环境工程
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）