Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 44
·15531-15540
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IF 6.4
Yin Lv,Shuhua Tu,Min Chen
All-inorganic CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PQDs)/polymer composite films have been used widely in light-emitting devices. Most methods of fabricating CsPbX3 PQDs/polymer composite films cannot meet the diverse requirements of real applications, particularly with regard to depositing or transferring films on different substrate types, including non-planar surfaces. It is still a challenge to prepare freestanding CsPbX3 PQDs/polymer composite films and deposit them on various substrates (especially non-planar substrates). Here, we report a facile way to prepare freestanding CsPbX3 PQDs/poly(styrene–ethylene–butylene–styrene) (SEBS) composite films via an interfacial-confinement (IC) strategy. The as-obtained films were applicable to various substrates (even curved and flexible substrates) and exhibited excellent stability against various environments. These freestanding CsPbX3 PQDs/SEBS composite films could be patterned readily for anti-counterfeiting and information-encryption applications. They also could be employed as color-conversion materials for white light-emitting diodes (LEDs).
研究领域:
材料科学
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光学工程
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纳米技术
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yunpeng Shao,Yue Niu,Wenlong Deng,Zicheng Zhang,Ruien Yu,Linyu Mei
In this study, we prepared large-area polydimethylsiloxane (PDMS) 3D flexible films deposited with silver nanoparticles (Ag NPs) by assembling Ag NPs on ordered micron-column (MC) arrays fabricated using SU-8 colloidal lithography (Ag NP@SU-8-MC). The large-scale, highly ordered 3D MC array flexible film offers numerous adsorption sites for densely packed Ag NPs. High-density sub-nanometer gaps between Ag NPs create spatial hot spots, enhancing the electromagnetic field. The results indicate that this flexible substrate achieves a detection limit of 10 −15 M for rhodamine 6G (R6G), with a relative standard deviation of less than 8 %, demonstrating excellent SERS sensitivity and uniformity. Furthermore, leveraging its high viscosity and flexibility, the ‘pasting-extraction’ method was employed to detect carbendazim and thiram on the surfaces of tomatoes and apples, achieving detection limits of 10 −10 M and 10 −11 M, respectively. Overall, this work presents a practical approach for preparing flexible and sensitive SERS substrates for food safety applications.
研究领域:
分析化学
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食品安全
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DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Chen Wang,Jianye Guang,Ruizhi Fan,Ming Lin,Jianuo Nie,Fang Wang,Wei Peng,Mengdi Lu
Flexible strain sensors have gained prominence in applications such as wearable devices, smart healthcare, and human motion monitoring due to their excellent adaptability and sensitivity. However, challenges such as high production costs and complex fabrication processes hinder their widespread commercial adoption. This study presented a fatigue-resistant polystyrene (PS) microsphere nanoarray optical strain sensor based on a polydimethylsiloxane flexible substrate, fabricated using a simple hemispherical indentation-assisted method. The sensor exhibited exceptional stability, enduring over 950 cycles, and demonstrated remarkable durability and sensitivity (−0.371 nm/%) at stretching speeds of 62.5 μm/s. Finite element analysis, supported by the experimental data, clarified the mechanical behavior of PS nanoarrays under varying strain angles and analyzed the influence of these angles on the sensing spectrum. Besides, fatigue points caused by repeated use could be naturally recovered, with the restored sensor maintaining excellent stability. The results suggested that this proposed flexible nanostructure offered a high-performance, cost-effective, and straightforward manufacturing option for strain optical sensors.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2024
·
IF 5.5
Jinxue Cheng,Zhipeng Feng,Zhihang Wang,Xiaoliang Yu,Zhi Fan,Peibin Zhang,Jing Cui,Minjie Guo
Background With the increased demand for energy storage devices, transparency, flexibility, and miniaturization are gradually becoming the future development direction of energy storage devices, among which supercapacitors have unexceptionable application potential. However, due to the limitation of substrate material, the flexibility, transparency, thermal properties, and mechanical properties of supercapacitors cannot be perfectly unified. Methods Herein, we fabricated a series of transparent Polyimide (PI) films by combining para-amide-linked diamine (AB-TFMB) with different ratios of Pyromellitic dianhydride (PMDA) and 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride (6FDA). A series of characterizations were conducted regarding the thermal stability, mechanical properties, dielectricity, optical properties, transmittance, moisture absorption, and solubility of the PI films. The transparent PI film was used as a flexible substrate and assembled into a transparent supercapacitor. Significant findings The results showed that the comprehensive performance of PI films could be effectively regulated by changing the monomer types and contents. Also, the assembled transparent supercapacitor exhibited good capacitance characteristics, and the capacitance retention rate after bending at different angles and repeating bending 10,000 times can reach 100 % and 99.45 %, respectively. These promising results demonstrate that turning PI monomers is a favorable method for preparing transparent supercapacitors, which is conducive to the development of transparent flexible supercapacitors in the future.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 45
·23200-23205
·
IF 6.895
Shuyu Liang,Yunzhi Dai,Gong Wang,Hong Xia,Jihong Zhao
Flexible ultraviolet (UV) photodetectors (PDs) have gained increasing demand because of their widespread applications in wearable devices. However, difficulties associated with complicated fabrication technologies significantly limit their scope of application. Herein, via the development of a femtosecond laser direct writing (FsLDW) strategy, silicon carbide (SiC) nanoparticles are found to be assembled in a single microwire within 30 s. The surface of the deposited SiC microwire presents a three-dimensional porous structure, which is conducive to improving the responsivity of the device. The responsivity of a SiC-based microwire PD to UV light at 365 nm is found to be 55.89 A W−1 at a 1 V bias. The as-fabricated SiC microwire PDs on a glass substrate exhibit thermal stability at 350 °C, and the response speed of the PDs becomes notably faster at high temperatures, suggesting their promising applications in harsh conditions. Due to the low-temperature processing characteristics of this process, they can be prepared not only on glass substrates, but also on thermosensitive polymer substrates without an extra transfer process. Moreover, the SiC microwires prepared via FsLDW are directly deposited on the flexible substrate, and the prepared flexible SiC-based PDs can still work stably after being bent 2000 times. This research unveils a feasible way to fabricate a PD with excellent thermal stability and mechanical flexibility.
研究领域:
材料科学
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光电子学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Li Wang,Daqing Yu,Baoquan Huang,Ziyuan Ou,Li Tao,Lili Tao,Zhaoqiang Zheng,Jun Liu,Yibin Yang,Aixiang Wei,Yu Zhao
Two-dimensional (2D) transition metal dichalcogenides materials have recently been explored as possible substrates for surface-enhanced Raman spectroscopy (SERS). However, in comparison to the conventional noble-metal-based counterpart, most of the 2D materials have very small area for SERS measurement, which is a big limitation toward practical applications. Herein, we presented our study of SERS using substrate-scale continuous ReS 2 monolayer films on flexible mica substrate. We demonstrated that the charge transfer between the target molecules and the atomically thin ReS 2 can be modulated by the underlying substrate of ReS 2 , resulting in greatly different suppressing level of FL background. Kelvin probe force microscopy revealed a large difference of surface potential between ReS 2 /SiO 2 and ReS 2 /mica, suggesting that the strong FL quenching of molecular on ReS 2 /mica might be attributed to the inert surface of layered mica. The large-area ReS 2 monolayer films on mica show a detection limit of R6G molecule around 10 −7 M and a robust SERS performance after an exposure in air for one month and repeated bending for 1000 times. Our work explores the practical application of 2D ReS 2 for molecular detection via SERS technique.
研究领域:
材料科学
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分子检测
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纳米技术
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DOI
高影响因子
THIN SOLID FILMS
·
2016
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IF 1.761
Yue Dong,Xiaodong Li,Shaohong Liu,Qi Zhu,Mu Zhang,Ji-Guang Li,Xudong Sun
Highly conductive silver patterns that can be cured at low temperatures were achieved by proper selection of the kinds of amines in the formulation of metal organic decomposition (MOD) ink. The inks were synthesized via a complexing reaction between silver tartrate and various amines in ethyl alcohol solvent. Four monoamines and two diamines with increased carbon chain lengths were used. The kinds of amines affected the thermal decomposition temperature of silver ink as well as the sheet resistance and microstructure of the obtained silver films significantly. The film from 1,2-diaminopropane ink showed the lowest resistance and uniform surface morphology among all the inks developed. The microstructural evolution of the cured silver films was well correlated with the formulations of the inks. The underlying mechanism was discussed. The ink formulations were further elaborated by proper selection of Ag/NH 2 molar ratios. Highly conductive silver films with excellent flexible stability and great adhesion were achieved using optimized silver MOD inks.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
·
IF 7.1
Guojun Weng,Yao Feng,Jing Zhao,Jianjun Li,Jian Zhu,Junwu Zhao
In this study, we developed a simple and sensitive surface-enhanced Raman scattering (SERS) technique for the detection of choline in infant formulas based on a filter-based flexible substrate. The flexible substrate with excellent SERS activity and reproducibility was fabricated using a syringe filter and Ag triangular nanoplates. The Raman marker, 3-mercaptophenylboronic acid, was oxidised to 3-hydroxythiophenol in the presence of H 2 O 2 , which caused a decrease in the SERS peak intensity ratio (I 1021 cm −1 : I 996 cm −1 ). Utilising the enhanced flexible substrate, a quantitative detection method for H 2 O 2 was developed. Additionally, choline could be hydrolysed by choline oxidase to generate betaine and H 2 O 2 . Thus, the SERS method was successfully applied to detect choline in the concentration range of 10 -3 –10 -7 M with a beneficial limit of detection as low as 8.36 nM. Importantly, the recovery of choline from infant formula milk powder was approximately 99 %. The excellent performance of the flexible substrate-based SERS method demonstrated its potential for application in H 2 O 2 -generated oxidase-based biosensing.
研究领域:
分析化学
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生物传感
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食品科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Zhengdong Zhu,Xiaoyi Shi,Yating Feng,Meng He,Cheng Ye,Hongyang Zhou,Maofeng Zhang,Wei Zhang,Jianhua Li,Changlong Jiang
Conventional surface-enhanced Raman scattering (SERS) molecular detection are based on hard and brittle substrate, which are not suitable for in-situ detection of analytes adsorbed on nonplanar surfaces. Here, we report a simple biomimetic synthesis method to fabricate lotus leaf mastoid structured AgNPs micro/nanoarrays as reliable SERS substrate. By ideal replicating mastoid structure of lotus leaf into a flexible and transparent PDMS film, followed by depositing plasmonic AgNPs, a powerful chemical sensor with high sensitivity and multiplex detecting capability is demonstrated. The employ of periodic mastoid structure array endows the sensor with high signal repeatability (RSD ∼ 8.6 %), solving the general repeatability problem of SERS substrates. In addition, the detailed designed flexible and transparent PDMS substrate is capable of identifying trace analytes on curved surfaces with excellent durability. In the proof-of-concept experiment, a limit of detection (LOD) of (10 −5 M to 10 −7 M) was achieved on a portable Raman device for three common pesticides residues (thiram, fonofos and triadophos) on dendrobium leaves and stem according to the molecular fingerprint, indicating its excellent in-situ detection capability. Further, the multiplex detection ability of the Ag/PDMS film is also demonstrated by analyzing the mixture of four typical analytes. Benefiting from its high signal uniformity, this flexible Ag/PDMS substrate also showed good quantitative detection capabilities.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 88
·47781-47787
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IF 3.708
Man Wang,Xuefeng Xu,Bing Ma,Yanyan Pei,Changchun Ai,Liangjie Yuan
Here we present a cheap alternative for the fabrication of conductive line patterns printed on a flexible PI substrate at intermediate temperature. In order to achieve this purpose, a low-cost and water-soluble screen printing conductive paste was prepared, with micron-SiO2@nano-Ag particles as the conductive filler. Variations in the filling content of micron-SiO2@nano-Ag, the addition of the coupling agent, curing temperature and time can remarkably affect the electrical and mechanical performance of the conductive paste. The optimal sheet resistance (at 62 mΩ □−1) and mechanical performance of the paste were achieved under the curing conditions of 140 °C for 30 min, with the filling content of 53.6 wt% of micron-SiO2@nano-Ag (32.4 wt% of Ag) and 1.0 wt% of the coupling agent APTES. The conductive mechanism of the paste was discussed according to the “percolation theory”. The conductive line patterns fabricated through silk-screen printing were applied to be linked with a LED into a circuit, suggesting that the paste would have a potential application in electronic devices.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
·
IF 4.098
Xiaoyuan Ma,Jie Xie,Zhouping Wang,Yin Zhang
Herein, we developed a PDMS-based flexible SERS substrate modified with gold nanostars (AuNSs) for in-situ detection of pesticide residues on fruit surfaces. AuNSs with sharp branches were assembled on aminated PDMS membrane by chemical bonding effect. The AuNSs/PDMS substrate showed good signal uniformity, stability and sensitivity using the Raman signal molecule 4-MBA and the detection concentration of 4-MBA was as low as 10 −8 mol/L. Then the AuNSs/PDMS substrate was used to detect methyl parathion (MP) standard solution. A good linear relationship between SERS intensity at 1342 cm −1 and MP concentration was established in the range of 4 μg/mL–100 μg/mL, and the limit of detection was down to 1.946 μg/mL. Moreover, the AuNSs/PDMS substrate was directly covered on the surface of MP contaminated apple, and the Raman laser was incident from the back of substrate to achieve in-situ detection of pesticide residues. The recovery ratio indicated that the fabricated SERS substrate was realized successfully in real sample detection. AuNSs/PDMS substrate eliminates the requirement for sample pre-processing steps before testing, which can be used as a method for rapid inspection of pesticide in agricultural products on site.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Borong Yu,Yue Mao,Jiangli Li,Jiaosuo Wang,Binbin Zhou,Pan Li,Yuanyuan Ma,Zhangang Han
Surface enhanced Raman spectroscopy (SERS) is a promising technique for trace determination. More and more attention is focused on hybrid SERS substrates, which coupled with noble metal nanoparticles and carbon-based materials. Herein, expanded graphite (EG) is used to prepare EG-covered support by ultrasonic washing and filtration. Such support is flexible and can be cut into any shape. And the contact angle ( θe ) for Au nanorods (Au NRs) sol on the EG-covered support was 108.2° and the hydrophobic surface is helpful for Au NRs to construct ‘hot spots’ during evaporation. The limits of detection (LOD) for crystal violet (CV), thiram, malachite green (MG) and methylene blue (MB) were as low as 1 ppb, 50 ppb, 1 ppb and 1 ppb, respectively. Moreover, a fast and convenient ‘paste-sampling’ method could be employed for trace contaminants on real samples, because EG-based Au NRs substrate is of flexibility and porosity. Thus, CV residue on shrimp could be determined lower than 1 ppb and thiram residue on grapes could be identified lower than 50 ppb. In addition to high sensitivity, the stability of EG-based Au NRs substrate is also very good. Even after acid/alkali pretreatment (pH = 4∼10) or 30 min of thermal treatment (T = 20∼100 °C), the enhancement of the substrate remained stable. What’s more, the substrate could be stored as long as 30 days. The highly stable, sensitive, cost-effective and easy-to-produce EG-based Au NRs substrates exhibit a great potential to promote application of SERS for routine analysis.
研究领域:
分析化学
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）