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Full Solution-Processed Fabrication of Conductive Hybrid Paper Electrodes for Organic Optoelectronics
摘要： There is growing interest in the development of “green” electronics fabricated from “natural” materials, which could lead to renewable, sustainable and potential inexpensive organic optoelectronics. In this paper, a novel, facile and full-solution processed approach has been successfully demonstrated to fabricate a highly flexible and conductive paper electrode by electroless deposition with the dopamine molecules as an adhesion layer on the newly hybrid paper. The novel paper substrate was prepared through simple hot-press with commercial paper and polypropylene (PP) film. And it has smooth surface and improved mechanical property. Importantly, it is flexible and highly resistant to water, which was important for solution process. The obtained highly conductive paper exhibited smooth and hydrophobic surface with high reflection. In addition, these conductive papers also showed excellent mechanical flexibility and stability, indicating the strong adhesion between metal and hybrid paper, which facilitates the roll-to-roll process of the device. As a possible application, this paper electrode can be effectively used as a mechanical support and electrode in organic light-emitting diode (OLED), showing the potential possibility in future electronics.
关键词： adhesion,dopamine,hybrid paper,electroless deposition,conductive
更新于2025-09-23 15:19:57
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Near-Infrared-Detached Adhesion Enabled by Upconverting Nanoparticles
摘要： Achieving efficient and biocompatible detachment between adhered wet materials (i.e., tissues and hydrogels) is a major challenge. Recently, photodetachable topological adhesion has shown great promise as a strategy for conquering this hurdle. However, this photodetachment was triggered by UV light with poor biocompatibility and penetration capacity. This study describes near-infrared (NIR) light-detached topological adhesion based on polyacrylic acid coated upconverting nanoparticles (UCNP@PAA) and a photodetachable adhesive (termed Cell-Fe). Cell-Fe is a coordinated topological adhesive consisting of carboxymethylcellulose and Fe3+ that can be photodecomposed by UV light. To prepare a substrate for NIR-detached topological adhesion, UCNP@PAA and Cell-Fe were mixed and brushed on the surface of the model adherent. The UCNP@PAA can harvest NIR light and convert it into UV light, triggering the decomposition of the Cell-Fe and inducing the detachment. This NIR-detached topological adhesion is also feasible in deep tissue because of the ability of NIR light to penetrate tissue.
关键词： upconverting nanoparticles,NIR-detached adhesion,biocompatibility,deep tissue
更新于2025-09-23 15:19:57
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Development of Picosecond Laser Writing for Heat Resistant FBG Sensors and Adhesion Technique for High Temperature Industrial Plants; ?????3?§??????????????·￥?????????è????±FBG ?????3??μè￡??????¨é???????￡?￥-??¨????????3???????????￥???;
摘要： Pulse laser processing point by point method is applied for heat resistant Fiber Bragg Grating structure. In order to fabricate fine FBG, a close packaged picosecond laser system is used with a CCD camera microscopy. An optical fiber is mounted on a precision translation stage. The stage speed is controlled by the current position and the corrector output. In order to contact the FBG on a metal surface, nano-size colloidal silver adhesive is used under temperature monitoring. Heat expansion of SUS plate can be successfully monitored by strain gauge of the heat resistant FBG. It can be available for monitoring the structural integrity of high temperature industrial plant. Complex coolant piping systems of liquid sodium and molten salt are facing the risk of coolant leakage, which is the most promising usage.
关键词： Structural Health Integrity,Picosecond Laser Processing,Adhesion,High Temperature,FBG
更新于2025-09-23 15:19:57
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Recent development of soluble hole injection material for OLED display
摘要： We developed soluble hole injection materials and inks, named ELsource, that can be used as hole injection layer in organic light-emitting diode (OLED) display. OLED is an optical device. Therefore, we developed the hole injection materials with optical properties necessary for an optical device.
关键词： refractive index,optical property,printable OLED,flexible,HIL,hole injection layer,soluble,hole injection material,adhesion,HIM
更新于2025-09-23 15:19:57
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Effect of (102) Diffracted Peak on Magnetic, Photoelectric, and Adhesive Characteristics of Fe <sub/>2</sub> Si Films
摘要： Fe2Si films with thicknesses from 100 nm to 600 nm underwent the following processes; (a) as-deposited films were maintained at room temperature (RT); (b) deposited films were post-annealed at 150 °C for 1 h, and (c) deposited films were post-annealed at a treatment temperature of 250 °C for 1 h. The X-ray diffraction (XRD) patterns of Fe2Si included significant (102) and (200) diffractions with corresponding peaks at 2θ are 44° and 53°, respectively. The (102) diffracted intensity and grain size of thicker and post-annealed Fe2Si thin films exceeded those of thinner and as-deposited Fe2Si thin films. The Fe2Si (102) peak revealed magneto-crystalline anisotropy, which reduced electrical resistivity and was associated with the highest low-frequency alternative-current (ac) magnetic susceptibility (χac). The maximum value of χac was reached at a thickness of 600 nm at the optimal frequency (fres) of 10 Hz, which generated maximized spin sensitivity. The resistivity (ρ) declined as the Fe2Si thickness and post-annealing temperature increased, because grain boundaries and the thin-film surface scattered the electrons. The 600 nm-thick Fe2Si thin film that was post-annealed at 250 °C had the lowest ρ of around 2.1 × 10^4 μΩ·cm. The as-deposited Fe2Si thin film with a thickness of 100 nm had the highest transmittance of approximately 48%. The maximum transmittance decreased slightly as the thickness increased and upon post-annealing. The surface energy of the as-deposited Fe2Si films exceeded those of post-annealed films, revealing that the adhesion of as-deposited Fe2Si films was stronger than that of post-annealed films owing to the degree of crystallinity.
关键词： Adhesion,Magneto Crystalline Anisotropy,Photoelectrical Property,Low-Frequency Alternative-Current Magnetic Susceptibility (χac)
更新于2025-09-19 17:15:36
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Dependance of Poly(acrylic acid) Interfacial Adhesion on the Nanostructure of Electrodeposited ZnO Films
摘要： Understanding the impact of the intricate morphology and surface chemistry of ZnO nanorod arrays on their interactions with polyelectrolyte polymers is crucial for the development of nascent ZnO-based adhesion-promoting materials. AFM based Single Molecule Force Spectroscopy (SMFS) was applied for the analysis of the adsorption of poly(acrylic acid) (PAA) on zinc oxide (ZnO) film covered stainless steel substrates in aqueous electrolytes at pH 7. Based on the electrodeposition process, the morphology of zinc oxide films could be varied ranging from platelet-like crystals to nanorods. This approach allowed for the morphology dependent analysis of macromolecular adsorption processes on complex ZnO nanostructures which have diverse applications in the field of adhesion-promoting thin films. The surface chemical composition, as determined by X-ray photoelectron spectroscopy, could be correlated to the AFM-based desorption studies. Only equilibrium desorption events (plateaus), centered at 42 pN, were observed on mirror polished, preconditioned stainless steel. However, for platelet-like ZnO films, the poly(acrylic acid) desorption showed a mixture of rupture events (mean rupture forces of about 350 pN) and equilibrium desorption, while ZnO nanorod structures showed solely rupture events with mean rupture forces of about 1300 pN. These results indicate that simultaneous multiple ruptures of carboxylate-zinc bonds occur due to the macromolecular coordination of poly(acrylic acid) to the ZnO nanorods. The analysis of the interfacial adhesion processes is further supported by the dwell time dependence of desorption processes.
关键词： poly(acrylic acid),Single Molecule Force Spectroscopy (SMFS),worm like chain (WLC) model,stainless steel,zinc oxide (ZnO),electrochemical deposition,molecular adhesion,adsorption free energy
更新于2025-09-19 17:15:36
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[IEEE 2018 International Semiconductor Conference (CAS) - Sinaia (2018.10.10-2018.10.12)] 2018 International Semiconductor Conference (CAS) - Effect of the Deposition Conditions on Titanium Oxide Thin Films Properties
摘要： This paper presents the fabrication and characterization of titanium oxide thin films deposited by Pulsed Laser Deposition in different experimental conditions. The scope of this work is to investigate the effect of the oxygen pressure in the deposition chamber on the material properties. Thin films characterizations include the mechanical and tribological properties such as the modulus of elasticity, hardness and the adhesion force. The mechanical and tribological properties of the materials are experimentally determined by using the atomic force microscopy technique. The effect of the oxygen pressure on the film thickness is analyzed. As the pressure in the deposition process decreases, the thickness of the thin films increases, respectively. The surfaces roughness increases as the deposition pressure decreases that leads to a decrease of adhesion forces. Hardness and modulus of elasticity increases as the deposition pressure decreases. This study shows that the mechanical and tribological properties of the investigated thin films strongly depend on the grain size and the films density, which are influenced by the deposition conditions (the oxygen pressure in the deposition chamber).
关键词： pulsed laser deposition,thin films,adhesion force,hardness,modulus of elasticity
更新于2025-09-19 17:15:36
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Blue Light Switchable Cell-Cell Interactions Provide Reversible and Spatiotemporal Control Towards Bottom-Up Tissue Engineering
摘要： Controlling cell–cell interactions is central for understanding key cellular processes and bottom-up tissue assembly from single cells. The challenge is to control cell–cell interactions dynamically and reversibly with high spatiotemporal precision noninvasively and sustainably. In this study, cell–cell interactions are controlled with visible light using an optogenetic approach by expressing the blue light switchable proteins CRY2 or CIBN on the surfaces of cells. CRY2 and CIBN expressing cells form specific heterophilic interactions under blue light providing precise control in space and time. Further, these interactions are reversible in the dark and can be repeatedly and dynamically switched on and off. Unlike previous approaches, these genetically encoded proteins allow for long-term expression of the interaction domains and respond to nontoxic low intensity blue light. In addition, these interactions are suitable to assemble cells into 3D multicellular architectures. Overall, this approach captures the dynamic and reversible nature of cell–cell interactions and controls them noninvasively and sustainably both in space and time. This provides a new way of studying cell–cell interactions and assembling cellular building blocks into tissues with unmatched flexibility.
关键词： bottom-up tissue engineering,spatiotemporal control,photoswitchable proteins,cell adhesion,cell–cell interactions
更新于2025-09-19 17:15:36
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Design and direct additive manufacturing of three-dimensional surface micro-structures using material jetting technologies
摘要： The ability to directly print 3D microstructures across the surface of large dimension substrates opens up numerous possibilities not feasible with conventional 2D or 2.5D printing or coating techniques. Demonstrated herein is a method to print 3D microstructures onto clear poly(methyl methacrylate) (PMMA) plates using material jetting technologies. Contact angle and profilometry analysis indicated that the VeroCyan? photopolymer had enhanced wetting of the PMMA surface leading to greater droplet spreading affecting the geometries printed compared to VeroCyanTM integrated models. Strategies to manipulate the interfacial interactions and hence adhesion of the VeroCyan? photopolymer were investigated by varying PMMA surface free energy through physio-chemical and chemical techniques including (i) corona discharge, followed by post-treatments with 3-(trimethoxysilyl)propyl methacrylate, polyethyleneimine graft chemicals, and (ii) plasma treatments with air and plasma polymerisation of 1,7-octadiene. The surface chemistry and wetting behaviour played a crucial role in influencing interfacial interactions with the VeroCyan? photopolymer hence its adhesion to the PMMA surface.
关键词： surface chemistry,material jetting,interfacial interactions,Additive manufacturing,adhesion
更新于2025-09-19 17:15:36
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Photovoltaic Module Reliability || Failure Analysis Tools
摘要： Regardless of whether a module has degraded from field exposure or accelerated stress testing, it is important to understand what has actually changed within the module that led to lost peak power. If we want to use the results to improve the module construction so that future modules will not degrade, we must understand what particular changes have occurred. In this chapter, we will explore some of the methods used to better understand what has gone wrong within the module. Methods reviewed include, analysis of the I–V parameters, measurement of performance at different irradiances, visual inspection, Infrared (IR) Inspection, Electroluminescence (EL) and evaluation of adhesion. Each will be discussed in the subsections that follow.
关键词： Infrared Inspection,Electroluminescence,Adhesion,I–V Curve,PV Module,Failure Analysis,Visual Inspection
更新于2025-09-19 17:13:59