查找使用阿拉丁产品的科研文献

Highly elastic Al/Si@TiO2 nanotubes fabricated from SBS/ALD strategy toward water purification applications

Wenlu Zhang,Mengzhe Bao,Mengyao Chen,Wenbin Li,Chong He,Weilin Xu

High-performance TiO 2 nanotube materials are highly demanded across various fields spanning thermal insulation, catalyst supports, filtration, and so on. However, the practical applications of hollow nanotubes are constrained by the low efficiency and uncontrollable structural properties. Herein, mass production of flexible and high catalytic hollow Al/Si@TiO 2 nanotubes were realized. Through solution blow spinning and atomic layer deposition processes, TiO 2 coated Al/Si@PAN core–shell nanofiber intermediate product was obtained with high efficiency. Hollow tubular structure of Al/Si@TiO 2 nanotubes with wall thicknesses among 150–350 nm was successfully replicated by sacrificing PAN core fibers template through a high-temperature pyrolysis process. Organic polysiloxane and polyalumina were employed as the internal supports to enhance the toughness and elasticity of the hollow Al/Si@TiO 2 nanotube products. Diameters of hollow Al/Si@TiO 2 nanotubes can be controlled ranging from 0.5-2.5 μm through adjusting the flow rate among 10–30 mL/h and air pressure among 0.2–0.4 MPa. Pyrolyzed hollow Al/Si@TiO 2 nanotubes exhibited remarkable elasticity with the compression strain of over 60 %. Hollow Al/Si@TiO 2 nanotubes demonstrated a methylene blue degradation efficiency of reached 61 % and outstanding reusability over multiple cycles, which held promising potential for utilization in high efficiency purification and remediation of water pollutants.

Nanotribological properties of 2-D MoS2 on different substrates made by atomic layer deposition (ALD)

Junjie Yang,Lei Liu

The friction influence of 2-D molybdenum disulfide (MoS 2 ) films deposited on different substrates (Si, SiO 2 and Al 2 O 3 ) by atomic layer deposition (ALD) has been investigated. All of the three substrates showed a trend of decreasing friction with increasing number of layers of MoS 2 , but the friction leveled off for more than 6 layers samples. Comparing these 2-D MoS 2 films with each other, MoS 2 on the Al 2 O 3 possesses the lowest friction, while MoS 2 on the Si possesses the highest one, owing to effect of substrate on the specific self-limiting reaction in ALD process. At the same time, the friction of the monolayer MoS 2 is strongest affected by sulfur deficient. As the number of layers increases, the influence of the substrate on the friction of MoS 2 can be approximately characterized by the work of adhesion. Greater work of adhesion corresponds to a higher friction force. When the thickness is more than 6 layers, the substrate effect disappears gradually. Moreover, the friction of 2-D MoS 2 could be controlled near linearly by changing plasma treatment time within the range from 1 to 20 s, which suggests a possible way for the friction control of 2-D MoS 2 on different substrate quasi-qualitatively or even qualitatively.

Facile fabrication of highly efficient Cu/CNT catalysts by ALD technique for methanol oxidative carbonylation

Lulu Peng,Shipin Wu,Ning Zhang,Jun Ren

Carbon nanotubes-loaded copper cluster catalysts (Cu x /CNT-ALD) were fabricated by atomic layer deposition (ALD) to achieve the construction of small-sized highly dispersed copper clusters in methanol oxidative carbonylation to synthesize dimethyl carbonate (DMC). The Cu/CNT-IMP catalyst was prepared by the traditional impregnation method for comparison. Owing to the distinctive surface self-limiting growth mechanism of the ALD method and the unique structure of CNT, the size of the copper clusters on the Cu10/CNT-ALD catalyst was controlled to about ∼0.48 nm and showed superior activity at ultra-low Cu loading of 0.21 wt%. Abundant oxygen-containing groups and defects on CNT provided stabilized Cu cluster immobilization sites, allowing the active Cu 0 sites to maintain a high concentration during the reaction. Cu 0 as the active species for the synthesis of DMC resulted in a turnover frequency of up to 141.0 h −1 on the optimal Cu10/CNT-ALD, which is about 14 times higher than that of Cu/CNT-IMP catalyst, and there was no significant inactivation after five cycles. This work offers insightful possibilities to investigate synthetic strategies for the preparation of cluster catalysts by atomic layer deposition and to improve DMC yields.

The Preventative Effects of Procyanidin on Binge Ethanol-Induced Lipid Accumulation and ROS Overproduction via the Promotion of Hepatic Autophagy

Peng Cao,Yu Zhang,Zi Huang,Mitchell A. Sullivan,Zihao He,Jinglin Wang,Zehong Chen,Huiping Hu,Kaiping Wang

Scope Autophagy plays an important role in alleviating alcoholic liver disease (ALD). In this study, it is discovered that a dimer procyanidin (DPC) significantly prevented ALD by promoting hepatic autophagy. Methods and results Both cell and animal disease models stimulated by excessive ethanol are employed to evaluate the protective actions of DPC. Specifically, in vitro, DPC significantly decreased intracellular lipid deposition, diminished reactive oxygen species (ROS) formation, and elevated the level of mitochondrial membrane potential. These beneficial effects can be remarkably blocked by 3-methyladenine, a potent autophagy inhibitor, suggesting the autophagy-dependent protective role of DPC. In vivo, DPC pretreatment can also significantly reduce lipid accumulation, ROS overproduction, and elevated GSH content in the liver. Similarly, these protective effects of DPC can be partially reversed by chloroquine, a lysosomal inhibitor used to block the late-stage autophagy flux. Moreover, the determinations of LC3 and p62 protein expressions, autophagic flux assessments, and transmission electron microscopy observation further demonstrate the pro-autophagic effect of DPC. Conclusions DPC may activate hepatic autophagy to eliminate lipid droplets and damaged mitochondria, thereby reducing hepatic lipid disposition and ROS overproduction. This study demonstrates that DPC is a protective reagent on ALD, providing a novel strategy of fighting ALD.

ALD-Deposited Hydroxyl-Rich NiOx to Enhance SAM Anchoring for Stable and Efficient Perovskite Solar Cells

Fengming Guo,Xuteng Yu,Yuheng Li,Yong Chen,Chi Li,Chunming Liu,Peng Gao

The interface between nickel oxide (NiOx) and self-assembled monolayers (SAMs) in perovskite solar cells (PSCs) often suffers from limited adsorption strength, poor energy-level alignment, and inadequate defect passivation, which hinder device performance and stability. To address these issues, we introduce a hybrid hole selective layer (HSL) combining atomic layer deposition (ALD)-fabricated NiOxwith full-aromatic SAM molecules, creating a highly stable and efficient interface. ALD NiOx, enriched with hydroxyl groups, provides robust adsorption sites for the SAM molecule MeO-PhPACz, ensuring a strong, stable interaction. This hybrid HSL enhances energy-level alignment, hole selectivity, and defect passivation at the NiOx/perovskite interface. Devices utilizing this approach demonstrate significant performance improvements, achieving a power conversion efficiency (PCE) of 21.74%, with reduced voltage losses and minimal hysteresis. Furthermore, operational stability tests reveal enhanced durability under elevated humidity and temperature conditions. These findings highlight the potential of ALD NiOxand SAM hybrid HSL to overcome existing barriers, advancing the commercial viability of PSC technologies.

Fabrication of high-performance ALD-Al2O3/SiO2 nanolaminate coating for atomic oxygen erosion resistance on polyimide

Chi Yan,Jialin Li,Yuhao Dai,ZhiJiang Lan,Haobo Wang,Hua Tong,Xiaojun Ye,Xiao Yuan,Cui Liu,Hongbo Li

Polyimide (PI), commonly used in space applications, is vulnerable to atomic oxygen (AO) erosion in low Earth orbit, causing performance degradation. Atomic layer deposition (ALD) of ultrathin films has great potential as AO protective coatings for aerospace materials. In this study, nanometer-thick plasma-enhanced atomic layer deposition (PEALD) SiO 2 films were deposited on in-situ oxygen plasma-activated PI surfaces. The nucleation and growth process of SiO 2 was systematically analyzed. A uniform and dense SiO 2 film was formed, providing limited resistance to AO erosion, but not sufficient for extreme environmental conditions. To further enhance AO resistance, we introduced thermal ALD-Al 2 O 3 interlayers within the same processing window and alternately deposited conformal, continuous Al 2 O 3 /SiO 2 nanolaminates on the PI surface. The Al 2 O 3 interlayer effectively reduced the film deposition roughness, forming a smoother, denser barrier layer and minimizing growth defects. This dense ALD-Al 2 O 3 /SiO 2 nanolaminate, with its inert Si-O-Al bonds, effectively prevents AO from penetrating the substrate, showing superior protection under long-term AO exposure. After AO irradiation, the surface remained smooth with no obvious defects or voids, effectively avoiding undercutting caused by AO. The synergistic effect of alumina and silica provides excellent AO protection while maintaining good optical transmittance.

Moth sex pheromones affect interspecific competition among sympatric species and possibly population distribution by modulating pre-mating behavior

Jianjun Cheng,Qinghua Chen,Qianshuang Guo,Yongjun Du

Premating behaviors mediated by pheromones play pivotal roles in animal mating choices. In natural populations of the striped stem borer Chilo suppressalis and the rice leaf roller Cnaphalocrocis medinalis in the rice field habitat, we discovered that Z11-16:Ald, a major component of the C. suppressalis pheromone, modulated the premating behavior of C. medinalis . Z11-16:Ald evoked a strong olfactory response in male antennae and strongly inhibited the sex pheromone trapping of male C. medinalis in the field. The functions of three C. medinalis sex pheromone receptor genes ( CmedPR1–3 ) were verified through heterologous expression in Xenopus oocytes. CmedPR1 responded to Z11-18:OH and Z11-18:Ald, as well as the interspecific pheromone compound Z11-16:Ac of sympatric species; CmedPR2 responded to Z13-18:OH and Z13-18:Ald, as well as the sex pheromone compounds Z11-16:Ald and Z9-16:Ald of sympatric species; and CmedPR3 responded to Z11-18:OH and Z13-18:OH, as well as the interspecific pheromones Z11-16:OH, Z9-16:Ald, Z11-16:Ac, and Z11-16:Ald of sympatric species. Thus, CmedPR2 and CmedPR3 share the ligand Z11-16:Ald, which is not a component of the C. medinalis sex pheromone. Therefore, the sex pheromones of interspecific species affected the input of neural signals by stimulating the sex pheromone receptors on the antennae of male C. medinalis moths, thereby inhibiting the olfactory responses of the male moths to the sex pheromones. Our results demonstrate chemical communication among sympatric species in the rice field habitat, the recognition of intra- and interspecific sex pheromones by olfactory receptors, and how insect premating behaviors are modulated to possibly affect resource partitioning.

Breaking the Humidity Barrier: ALD-Engineered Pt–WO3 Photoelectrode for Ultra-Stable Photo-Assisted Li–O2 Batteries

Jiale Han,Guofan Wang,Xu Hu,Jinlin Li,Zhaojun Xie,Zhen Zhou

Rechargeable lithium oxygen (Li–O2) batteries are regarded as promising candidates for future energy storage systems due to their exceptionally high theoretical energy density. However, their practical implementation faces major obstacles, including high charge and discharge overpotentials and a semiopen battery structure that is highly sensitive to humidity. These factors lead to reduced efficiency and poor stability in moist air, significantly limiting real-world application. To address these challenges, a composite photoelectrode was developed by directly growing tungsten trioxide (WO3) nanoribbons on carbon paper (CP), followed by the uniform deposition of platinum nanoparticles using atomic layer deposition. Compared to WO3 photoelectrode, the resulting Pt–WO3 photoelectrode enables stable operation of photoassisted Li–O2 batteries under humid oxygen atmosphere. The batteries sustain stable operation for over 100 cycles without failure at current densities of 0.05 and 0.2 mA cm–2. Advanced characterization and theoretical calculations confirm the formation of an ohmic contact between platinum and tungsten trioxide, which promotes the separation of photogenerated electrons and holes, improves charge transfer, and facilitates the reversible formation and decomposition of lithium hydroxide (LiOH). This strategy effectively overcomes critical barriers faced by conventional Li–O2 batteries in real-world environments and provides a promising direction for the design of environmentally tolerant and photoelectrochemically efficient energy storage systems.

Pt Atom on the Wall of Atomic Layer Deposition (ALD)-Made MoS2 Nanotubes for Efficient Hydrogen Evolution

Songlong Jiao,Mengshu Kong,Zhenpeng Hu,Shiming Zhou,Xiaoxuan Xu,Lei Liu

Single-atom catalysts (SACs) can achieve excellent catalytic efficiency at ultralow catalyst consumptions. Herein, platinum (Pt) atoms are fixed on the wall of atomic layer deposition (ALD)-made molybdenum disulfide nanotube arrays (MoS 2 -NTA) for efficient hydrogen evolution reaction (HER). More concretely, MoS 2 -NTA with different nanotube diameters and wall thicknesses are fabricated by a sacrificial strategy of anodic aluminum oxide (AAO) template via ALD; then Pt atoms are fixed on the wall of Ti 3 C 2 -supported MoS 2 -NTA as a catalytic system. The MoS 2 -NTA/Ti 3 C 2 decorated with 0.13 wt.% of Pt results in a low overpotential of 32 mV to deliver a current density of 10 mA cm –2 , which is superior to 20 wt.% commercial Pt/C (41 mV). Ordered MoS 2 -NTA instead of 2D MoS 2 prevents Pt atoms from aggregating and then exerts catalytic activities. The density functional theory calculations suggest that the Pt atoms are more likely to occupy the sites on the tubular MoS 2 than the planar MoS 2 , and the Pt atoms accumulated at the Mo site of MoS 2 -NT have a moderate Gibbs free energy (close to zero).

Tailoring the Electronic Metal-Support Interaction of Single-Atom Platinum Catalysts for Boosting Water-Gas Shift Reaction

Ziyi Shui,Fenglian Zhang,Hongling Yang,Mengfei Zhao,Zeyu Zhao,Ganggang Li,Zheng Wei,Guoxia Jiang,Zhongshen Zhang,Zhengping Hao

Exploring electronic metal-support interaction (EMSI) in heterogeneous catalysis is significant for developing efficient supported metal catalysts. Herein, single-atom Pt 1 /CeO 2 catalysts possessing diverse local structures and coordination environments are convincingly fabricated via ALD technique for the water-gas shift reaction (WGSR). The PtCe-2 catalyst obtained after two ALD cycles is primarily composed of Pt 1 coordinated to five oxygen atoms (Pt 5c ), while the PtCe-6 catalyst is dominated by Pt 3c configuration. The PtCe-2 catalyst exhibits an H 2 production rate ≈2.4 times higher than that of PtCe-6 at 250 °C. The combined experimental and theoretical studies demonstrate that the atomic location-induced strong EMSI weakens the adsorption strength of CO on Pt 5c , subsequently lowering the energy barrier for the crucial intermediate step of CO conversion. This study elucidates the effect of EMSI in the WGSR, and provides new insights for the rational design of efficient single-atom catalysts.

High-Performance Thin-Film Transistors and Inverters Based on ALD-Derived Ultrathin Al2O3-Passivated CeO2 Bilayer Gate Dielectrics

Leini Wang,Gang He,Wenhao Wang,Xiaofen Xu,Bo He,Xiaoyu Wu,Yongchun Zhang

Construction of PP membranes with robust interfacial stability by ALD and fluorinated grafting for high salt solution distillation

Lei Zhang,Dan He,Jia Li,Yanting Li,Yiming Xiao,Jun Xiang,Wei Du,Na Tang

In this work, PP-TSF superhydrophobic membrane was constructed by a triple layer on the PP membrane, containing titanium layer by atomic layer deposition , silica layer by sol-gel, and fluorine layer by chemical grafting. The titanium layer worked as a transition layer, increasing the binding stability between PP and the superhydrophobic layer, the silica layer provided more hydroxyl sites for superhydrophobic modification. Meanwhile, and the fluorine layer with low surface energy was the core of the superhydrophobic property. The microstructure, porosity, and pore diameter had no significant change after modification. The contact angle of the composite membrane was up to 158 o , and the rolling angle was less than 10 o . The hydrophobicity , self-cleaning properties, and surface roughness are significantly improved after modification. The salt retention of the high salt (15 wt%) was consistently higher than 99 % during the 21-h vacuum membrane distillation experiment.