COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Cuiru Wang,Xinyu Li,Wenhui Gu,Yisong Zhao,Tifeng Jiao
The composite Langmuir-Blodgett films of organic photovoltaic materials demonstrate unique advantages in the fields of photovoltaic devices, sensing, and chiral optics by fusing the functionality of organic materials with the orderliness of LB technology through precise assembly at the molecular scale. In this study, composite LB films of o-phenylphenoxyethyl acrylate (OPPEA) and bis-etherfluorene acrylate (A-BPEF) with Congo red (CR), methylene blue (MB), rhodamine B (RhB), and Saffron T (ST) dyes, respectively, have been successfully prepared by LB technology. The microstructure and optical properties of the composite films were systematically characterized by means of surface pressure-area isotherms (π-A curves), atomic force microscopy (AFM), transmission electron microscopy (TEM), contact angle measurements, and UV–visible spectroscopy, and the acid-base gas response and photoelectric conversion properties were investigated. The results show that different dye subphases significantly affect the molecular arrangement and microscopic morphology of the composite films, and the OPPEA/CR and A-BPEF/CR composite films exhibit significant response to HCl and NH 3 gases, while the OPPEA/RhB and A-BPEF/ST composite films show excellent photoelectric conversion efficiency and stability. This study provides a theoretical basis for the design and application of high-performance organic photovoltaic materials.
研究领域:
有机光伏
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材料科学
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薄膜技术
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传感器
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自组装
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纳米技术
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产品关联
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 12
·1449
·
IF 2.8
Asen Dimov,George R. Ivanov,Leonard Keil,Andreas Terfort,Jinxuan Liu,Velichka Strijkova
HighlightsWhat are the main findings?A metal–organic Framework (MOF) MIL-101(Cr) with crystal sizes around 20 nm was synthesized and the results were compared to a 300 nm crystal-sized commercially available material.What are the implications of the main findings?Smaller-sized MIL-101(Cr) crystals form a stable insoluble monolayer at the air–water interface with denser, more homogeneous water coverage and packing upon compression, and no visible micrometer-sized aggregates.Langmuir-Blodgett monolayers from the 20 nm MOF show six times lower surface roughness.Metal–Organic Frameworks (MOFs) have diverse applications due to their tunable porosity, large surface area, and diverse chemical functionalities. Among them, one of the most researched MOFs is MIL-101(Cr), which, in addition, is very stable in water. We have used a commercially available substance with approximately 300 nm large crystals for the preparation of a sensing nano-thin layer for the emerging water contaminant PFOS, due to its high selectivity towards this compound. Here, we have synthesized 20 nm sized crystals of MIL-101(Cr), which are among the smallest reported, and compared them to the same material with 300 nm sized crystals. The material was characterized by TEM and XPS. It was possible to prepare insoluble monolayers at the air–water interface (Langmuir films), which were characterized with film compression isotherms, Brewster angle microscopy, and surface potential measurements. The Langmuir–Blodgett (LB) method was used to deposit monolayers on Si wafers and 434 MHz Surface Acoustic Wave resonator simultaneously. The LB layers were very stable over time. The smaller-sized MIL-101 (Cr) crystals exhibit denser, more homogeneous water coverage and packing upon compression, with no observable 10–100 µm aggregates. LB monolayers from the 20 nm particles have approximately six times lower surface roughness. The LB monolayer is far from being smooth, but this will allow excellent access to the MOF pores by the tested analyte in a chemical sensing application. The lack of research on depositing presynthesized MOFs using probably the best method for nanoarchitectonics—the LB method—is addressed. The 20 nm sized MOF crystals are the smallest deposited by this method so far.
研究领域:
材料科学
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纳米技术
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表面化学
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分析化学
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传感器与传感材料
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产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Wenjie Ji,Wenjing Zhao,Weibin Li,Yuren Wang,Jin Wang,Ding Lan
Preparing organic coatings in a very controlled manner through the spreading of organic molecules on the water surface is one of the emphases for research in Langmuir-Blodgett (LB) technology. For preparing a homogeneous film and improving the quality of the film, it is our concern to have a deeper understanding of the dynamic process involved in spreading. Here, we present an overview of the hydrodynamic process under the influence of assisting the spreading solvent, which mainly focuses on the mechanical mechanisms of related phenomena. A typical spreading experiment of two-component mixed droplets on water substrate for the purpose of preparing LB films was carried out in this research. We perform the spreading of a liquid of silicone oil and oleic acid mixture on the horizontal surface of another immiscible deep water substrate, where the volatile silicone oil is the assisting spreading solvent with low viscosity. We find that it needs to exceed a certain critical value (60% in our experiment) to achieve a uniform and centrosymmetric spreading process, which is a key factor for getting a homogeneous film. We observe that the evolution of a large droplet into liquid film and then into small droplets under the action of surface tension gradient in experiments. Gravity-viscous and surface tension-viscous dominate successively in the whole spreading process, with its spreading radius r(t) ∝ t1/4 and r(t) ∝ t3/4, respectively. However, we also obtain singular values of scaling exponents −0.033 and −0.180, which is attributed to nonuniform distribution of the Laplace pressure caused by different curvatures near the capillary wave.
研究领域:
物理学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Zhicheng Xing,Zongyan Zhang,Tao Wang,Xiaorui Liu,Haojie Xing,Xinqing Gao,Peigang Han,Bin He,Stephan Handschuh-Wang
In this study, nanodiamonds chemically modified with C12 and C18 hydrocarbon chains were studied for their use in Langmuir-Blodgett deposition. The hydrophobic nanodiamonds were spread from dichloromethane (best solvent in this study) and a compression of 30 mN/m was used to transfer the nanoparticles onto the silicon substrate. Heating this substrate to 400 °C indicates that the particles do not desorb or form aggregates. Finally, the seeded substrate was used for diamond growth via hot filament chemical deposition (HFCVD), resulting in growth of a ca. 2.8 ± 0.1 μm thick diamond film without pinholes, illustrating the feasibility of this approach.
研究领域:
材料科学
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表面工程
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纳米技术
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薄膜制备
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化学气相沉积
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产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2017
·Vol. 12
·期 1
·1-9
·
IF 2.833
Luo Xiaona,Ma Kai,Jiao Tifeng,Xing Ruirui,Zhang Lexin,Zhou Jingxin,Li Bingbing
The effective synthesis and self-assembly of graphene oxide (GO) nanocomposites are of key importance for a broad range of nanomaterial applications. In this work, a one-step chemical strategy is presented to synthesize stable GO-polymer Langmuir composite films by interfacial thiol-ene photopolymerization at room temperature, without use of any crosslinking agents and stabilizing agents. It is discovered that photopolymerization reaction between thiol groups modified GO sheets and ene in polymer molecules is critically responsible for the formation of the composite Langmuir films. The film formed by Langmuir assembly of such GO-polymer composite films shows potential to improve the mechanical and chemical properties and promotes the design of various GO-based nanocomposites. Thus, the GO-polymer composite Langmuir films synthesized by interfacial thiol-ene photopolymerization with such a straightforward and clean manner, provide new alternatives for developing chemically modified GO-based hybrid self-assembled films and nanomaterials towards a range of soft matter and graphene applications.
研究领域:
材料科学
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Shuxin Sun,Cuiru Wang,Shiqi Han,Tifeng Jiao,Ran Wang,Juanjuan Yin,Qing Li,Yanqiu Wang,Lijun Geng,Xudong Yu,Qiuming Peng
Metal-ligand coordination is one of the most important interactions in supramolecular assembly. Terpyridine compounds demonstrate strong metal coordination ability and can coordinate with many transition metal ions to form complexes with unique optical and electrochemical properties. In this work, new self-assembled Langmuir films of three synthesized terpyridine derivatives with different spacers were prepared by Langmuir-Blodgett (LB) technique. The interfacial phase behaviors and coordination with K 2 PtCl 4 and ZnCl 2 subphases in the obtained LB films were studied. The spreading films from different subphases were transferred to corresponding solid substrates and their nanostructures and self-assembly features were characterized. The good acidichromism properties of the prepared LB films from present terpyridine derivatives were investigated by using UV–vis and FT-IR spectroscopy. The obtained results showed new clues for preparation of functional coordination polymers films and potential applications in molecular switches and biosensors fields.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Dandan Wei,Yuntong Chu,Qing Sun,Hongjie Ding,Cong Wang,Huali Nie
Kirschner wires (K-wires) are widely used as orthopedic external fixators due to their versatility and effectiveness. However, infection at the pin tract is a frequent and feared complication of K-wires. Thus, in this study, graphene oxide/copper ion (GO/Cu 2+ ) complex was coated on K-wires surface via Langmuir-Blodgett (LB) assembly to endow K-wires with antibacterial and biocompatible properties. This new LB strategy enables the facile control of the coating microstructure, including the arrangement, density and number of layers to achieve adjustable GO/Cu 2+ loading, sustained Cu 2+ release behaviors. During the LB process, GO sheets floating on the water-air interface were oriented in an arrangement such that a significant number of edges were exposed. The GO/Cu 2+ coating exhibited inherent antibacterial properties in vitro and in vivo through the sharp-edged sheet structure of GO, membrane stress and the generation of reactive oxygen species (ROS). Moreover, MC3T3-E1 cells on modified K-wires showed better adhesion, migration and proliferation abilities because of the synergistic effects of physical structure and chemical properties of the GO/Cu 2+ coating. Thus, modified K-wires could be promising as potent antimicrobial materials for orthopedic surgery.
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pengfei Bian,Huiqing Yang,Lexin Zhang,Zhiwei Liu,Guiying Qiao,Yong Han,Tifeng Jiao
Novel organic small molecule structures have received increasing attention in the preparation of multifunctional thin film materials and have become the subject of research in many cutting-edge directions. In this work, imidazolyl and transbutylene glycolic acid molecules and dye molecules were designed and prepared as composite films by supramolecular self-assembly in the LB technique, and their morphological features and spectral properties were analyzed. The results showed that the prepared LB films presented different aggregation states. In addition, their photoelectrochemical properties, on ITO sheets were tested, all of which showed good optoelectronic properties, and their binding energies, structure optimization, and electrostatic potentials were theoretically calculated by DFT simulations, which proved that the prepared films have good optoelectronic properties, and have the potential to become optoelectronic multifunctional ultrathin film devices.
研究领域:
材料科学
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有机化学
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光电子学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 13
·H592
·
IF 3.12
Yanju Wu,Zijing Liu,Shihao Zhou,Fei Wang,Can Zhang,Kui Lu
In this work, Langmuir−Blodgett (LB) technique was proposed to assemble the homogeneous and controlled films of carboxylic multiwalled carbon nanotubes-Nafion (c-MWCNTs-Nafion). Microstructure and electrochemical performance of LB films of c-MWCNTs-Nafion were characterized by AFM, SEM and electrochemical experiments. Moreover, the LB film of c-MWCNTs-Nafion was transferred to the surface of glassy carbon (GC) electrode to fabricate the electrochemical voltametric and amperometric sensor for codeine. The fabricated sensor showed enhanced electrocatalytic behavior for the oxidation of codeine. The amperometric currents for codeine are proportional to its concentration in a range from 1.0 × 10−7 to 1.0 × 10−5 mol L−1 with a detection limit of 3.0 × 10−8 mol L−1. And the proposed method exhibited good repeatability, stability, selectivity and accuracy.
研究领域:
分析化学
·
材料科学
·
医学检测
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xingdi Zhao,Pengfei Bian,Liu Wang,Xinyu Li,Jingxin Zhou,Yuqing Qiao,Mingli Wang,Tifeng Jiao
Cholesterol derivatives play a vital role in various fields, including medicine, biology, and smart materials. The Langmuir-Blodgett (LB) technology uses molecular self-assembly to create interfacially organized thin film materials with unique characteristics. This work primarily used two cholesterol derivatives (CCA and CCH) coupled with various dyes to create multilayer composite LB films. The SERS test determined the enhancement factor EF=1.07×10 5 for the CCA/ST composite film and EF=1.12×10 5 for the CCH/ST multilayer composite films, with relative standard deviation RSD=12.58% and 3.86%, respectively. The result demonstrates the superior signal responsiveness and uniformity of the resultant LB films, offering a novel option for active substrate materials in SERS detection of trace compounds. The photoelectric response signal of the CCA/dye and CCH/dye composite LB films was demonstrated to be sensitive by the photoelectric conversion test, and the films' superior reusability was demonstrated by the persistence of the same pattern over several recurring cycles. It offers a novel idea for investigating the use of cholesterol derivatives in optoelectronic devices in more detail.
研究领域:
分析化学
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材料科学
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纳米技术
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光电子学
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表面科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 8
·890
·
IF 2.8
Xingdi Zhao,Xinyu Li,Pengfei Bian,Qingrui Zhang,Yuqing Qiao,Mingli Wang,Tifeng Jiao
Chiral molecules are crucial in the field of optical devices, molecular recognition, and other novel functional materials due to their unique spatially asymmetric configuration and optical activity. In this study, a chiral molecule, Cholest-3-yl (E)-3-(4-carbamoylphenyl)acrylate (CCA), was combined with dyes containing large conjugated structures, tetramethylporphyrin tetrasulfonic acid (TPPS), and Nickel(II) phthalocyanine-tetrasulfonic acid tetrasodium salt (TsNiPc), and composite LB films of CCA/TPPS and CCA/TsNiPc were successfully prepared by using Langmuir-Blodgett (LB) technology. The circular dichroism (CD) test proved that the CCA/TPPS composite film had a strong CD signal at 300–400 nm, and the composite film showed chirality. This significant optical activity provides a new idea and option for the application of LB films in chiral sensors. In the Surface Enhanced Raman Spectroscopy (SERS) test, the CCA/TPPS composite film was sensitive to signal sensing, in which the enhancement factorEF= 2.28 × 105, indicating that a large number of effective signal response regions were formed on the surface of the film, and the relative standard deviation (RSD) = 12.08%, which demonstrated that the film had excellent uniformity and reproducibility. The high sensitivity and low signal fluctuation make the CCA/TPPS composite LB film a promising SERS substrate material.
研究领域:
光学材料
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手性传感
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薄膜技术
·
表面增强拉曼光谱
·
分子识别
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Jingwen Song,Kai Ma,Tifeng Jiao,Ruirui Xing,Lexin Zhang,Jingxin Zhou,Qiuming Peng
Graphene oxide (GO)-based nanocomposite films via facile and appropriate self-assembly methods have demonstrated many potential applications in wide fields. This study demonstrates a facile and clean route to prepare graphene oxide-dye composite films using Langmuir-Blodgett (LB) technique at room temperature. By electrostatic interaction between cationic dye molecules and negatively charged GO sheets as well as π-π interactions, GO-dye composite LB films were formed spontaneously. As a soft platform for dye molecules, GO sheets induce dye molecules to self-assemble and form highly ordered structures containing H-aggregates and/or J-aggregates. The morphological characterization results show the formation of GO-dye composite films with smooth and dense surfaces. And the spectral results reveal that dye molecules stack in well-organized aggregates on the surface of GO sheets corresponding to monomers in bulk solution. The present research work about GO-dye composite films by LB method may provide new clues to prepare organized composite films and demonstrate potential applications in many fields.
研究领域:
材料科学
·
纳米科技
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表面化学
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胶体与界面科学
·
功能薄膜
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）