检索结果-内蒙古大学图书馆

Effect of hydrogen sulfide concentration on two-dimensional SnS2 film by atomic layer deposition in annealing process

引用

NANOTECHNOLOGY 2025年第3期36卷 035602-035602页

作者： Yoon, Heejun Jeon, Hyeongtag Hanyang Univ Dept Nanoscale Semiconduector Engn Seoul 133791 South Korea Hanyang Univ Div Mat Sci & Engn Seoul 133791 South Korea

Two-dimensional materials are widely studied due to its unique physical, optical, electrical properties, and good compatibility with various synthesis methods. And among the many fabrication methods, tin disulfide (SnS2) material, a two-dimensional (2D) material that can be achieved with accurate thickness control using atomic layer deposition (ALD), high uniformity and conformality even at low process temperatures is attracting attention. However, since the crystallinity of the thin film is low at a low process temperature, various post-annealing methods are being studied to compensate for film quality. In this work, we compared the crystal structures, chemical binding energies, and electrical properties of the thin films by post-annealing SnS2 thin films according to the hydrogen sulfide concentrations of 4.00% and 99.99% in the hydrogen sulfide atmospheres. The crystallinity, grain size, and carrier concentrations of the SnS2 thin film were the highest at a post-annealing temperature of 350 degrees C at a hydrogen sulfide concentration of 99.99%, and the chemical binding energies also corresponded with the standard Sn4+ states, forming a pure 2D-hexagonal SnS2 phase. In addition, SnS2 thin films deposited via ALD showed high uniformity and conformality in large-scale wafers and trench structure wafers.

关键词： atomic layer deposition tin disulfide 2D material annealing hydrogen sulfide

来源：评论

学校读者我要写书评

暂无评论

Analysis of Power Supply Parameters for Indirect process control 7

Analysis of Power Supply Parameters for Indirect Process Con...

引用

7th International conference on Mechatronics, Robotics and Automation

作者： Aboudeif, Sohyla M. Ilyin, Alexey P. API Technol Ltd Moscow Inst Phys & Technol Moscow Russia API Technol Ltd Chem Divers Grp Chimki Moscow Dstr Russia

ISBN: (纸本)9798350352481;9798350352474

Most processes in chemical technologies are performed on non-transparent equipment (metal, opaque plastic, thermally insulated equipment). This prevents visual monitoring of the process in progress and, in certain cases, necessitates the installation of costly and sophisticated optical sensors in the machinery in order to enable the automation governing the process to make the required decisions. At the same time, most of these changes can be detected by indirect signs using sensors already installed in the system, which makes it possible to simplify and reduce the cost of parameter monitoring methods. One of these methods can be the use of data received from a monitor of electrical network parameters. In some cases, changes in the value of consumed currents, active and apparent power can be clearly associated with the processes occurring in the "black box", and after proper calibration, serve as reliable criteria for making certain decisions.

关键词： process control automation pharmaceutical production

来源：评论

学校读者我要写书评

暂无评论

Integrated characterization of hydrodynamic cavitation: optical, chemical, and simulation correlations

引用

chemical ENGINEERING SCIENCE 2025年 306卷

作者： Xiao, Jiani Dommke, Maximilian Franke, Marcus Stelter, Michael Braeutigam, Patrick Fraunhofer Inst Ceram Technol & Syst Fraunhofer IKTS Michael-Faraday-Str 1 D-07629 Hermsdorf Germany Friedrich Schiller Univ Jena Inst Tech & Environm Chem Philosophenweg 7a D-07743 Jena Germany Friedrich Schiller Univ Jena Ctr Energy & Environm Chem Philosophenweg 7a D-07743 Jena Germany Univ Stuttgart Inst Sanit Engn Bandtale 2 D-70569 Stuttgart Germany

Hydrodynamic cavitation (HC) is an advanced oxidation process for degrading micropollutants, primarily driven by hydroxyl radicals (OH center dot). This study addresses the research gap by characterizing HC under high upstream pressures (up to 60 bar) and integrating chemical, optical, and simulation approaches for a comprehensive characterization of HC processes. OH radical production was quantified with salicylic acid, and bisphenol A (BPA) degradation experiments validated their role in oxidation reactions. optical methods captured cavitation jet and luminol chemiluminescent images, while simulations estimated vapor bubble formation and cavitation gas fractions. This research focuses on the high-pressure range of 10 to 60 bar in HC systems, demonstrating a proportional relationship between pressure and both the production rate of OH radical and the rate constants of BPA degradation. At 60 bar, the highest concentration of OH radicals and BPA degradation rate were observed. This research enhances the understanding of HC and its potential for optimized pollution control.

关键词： Hydrodynamic cavitation Hydroxyl radicals Micropollutant degradation Luminol chemiluminescence Computational fluid dynamics (CFD)

来源：评论

学校读者我要写书评

暂无评论

A Comparative Study of Ethylene Detection methods in Fruit Supply Chains: a Review

引用

FOOD ANALYTICAL methods 2024年第1期17卷 14-32页

作者： Kaur, Kirandeep Singh, Rajpreet Kaur, Gagandeep Punjab Agr Univ Dept Fruit Sci Ludhiana 141014 India

Ethylene is a primary plant hormone associated with the ripening process of fruits. Ethylene can initiate the ripening process in fruits even at sub-parts per million concentrations. Therefore, ethylene monitoring during fruit transport and storage is very important in order to ensure optimum quality control and shelf-life extension. However, due to small molecular size, non-polar and highly stable nature of ethylene, the development of ethylene detectors on trace level concentration always remains a challenge. The ubiquitous interference of water molecule to various types of ethylene gas-sensing technologies require efforts to design and utilize effective and durable moisture filters for accurate ethylene gas detection. This work compares various ethylene detection methods for laboratory use as well as portable devices for field applications. Particularly, three methods have shown the most encouraging results in ethylene detection and are used to manufacture portable devices for fruit supply chains: electrochemical, gas chromatography and optical detection. New chemical and physical sensors for ethylene detection and quantification have been compared with scientific literature based on comparable parameters. The parameters specifically focus on the needs of horticulture industry like sensitivity, selectivity, price, robustness and inexpensiveness. This study shall assist the fruit logistics in better selection of ethylene sensing technologies in the fruit supply chain, resulting in better fruit quality and reduced losses after harvest.

关键词： Ethylene Non-dispersive infrared (NDIR) detection Photoacoustic spectroscopy Gas chromatography optical sensors

来源：评论

学校读者我要写书评

暂无评论

Application of coal chemical dewatering process algorithm based on temperature control

Application of coal chemical dewatering process algorithm ba...

引用

2023 International conference on Computer, Artificial Intelligence, and control Engineering, CAICE 2023

作者： Liu, Ming Zhang, Hua CHN Energy Xinjiang Chemical Co. Ltd. Xinjiang Urumqi831404 China

ISBN: (纸本)9781510665040

In recent years, the dehydration of the coal chemical industry plays an indispensable role in the production process of coal chemical industry. In order to further predict its application range in coal chemical equipment, this paper introduces several forms of coal dehydration in industrial production and proposes algorithms that can be applied in current coal chemical dehydration. In addition, it also summarizes the drying methods and characteristics, and analyses the advantages and disadvantages of different drying methods through multi-characterization. Using numerical simulation and multidimensional microstructure analysis methods to construct a visual numerical simulation model. In order to provide theoretical guidance and reference for promoting energy conservation, emission reduction, efficiency and environmental protection in the coal industry through data prediction. © 2023 SPIE.

关键词： Dehydration

来源：评论

学校读者我要写书评

暂无评论

Exploring the potential of simple automation concepts for quantifying functional groups on nanomaterials with optical assays

引用

Nano Research 2024年第11期17卷 10119-10126页

作者： Isabella Tavernaro Anna Matiushkina Kai Simon Rother Celina Mating Ute Resch-Genger Division Biophotonics Federal Institute for Materials Research and Testing (BAM) Richard-Willstaetter-Str. 11 Berlin 12489 Germany

Until now, automation in nanomaterial research has been largely focused on the automated synthesis of engineered nanoparticles (NPs) including the screening of synthesis parameters and the automation of characterization methods such as electron microscopy. Despite the rapidly increasing number of NP samples analyzed due to increasing requirements on NP quality control, increasing safety concerns, and regulatory requirements, automation has not yet been introduced into workflows of analytical methods utilized for screening, monitoring, and quantifying functional groups (FGs) on NPs. To address this gap, we studied the potential of simple automation tools for the quantification of amino surface groups on different types of aminated NPs, varying in size, chemical composition, and optical properties, with the exemplarily chosen sensitive optical fluorescamine (Fluram) assay. This broadly applied, but reportedly error-prone assay, which utilizes a chromogenic reporter, involves multiple pipetting and dilution steps and photometric or fluorometric detection. In this study, we compared the influence of automated and manual pipetting on the results of this assay, which was automatically read out with a microplate reader. Special emphasis was dedicated to parameters like accuracy, consistency, achievable uncertainties, and speed of analysis and to possible interferences from the NPs. Our results highlight the advantages of automated surface FG quantification and the huge potential of automation for nanotechnology. In the future, this will facilitate process and quality control of NP fabrication, surface modification, and stability monitoring and help to produce large data sets for nanomaterial grouping approaches for sustainable and safe-by-design, performance, and risk assessment studies.

关键词： automation quantification of amino groups fluorescamine assay amorphous silica nanoparticles iron oxide nanoparticles upconversion nanoparticles

来源：评论

学校读者我要写书评

暂无评论

Hard Failure Prediction of ADI Pattern using optical Parameters and Machine Learning 37

Hard Failure Prediction of ADI Pattern using Optical Paramet...

引用

conference on optical and EUV Nanolithography XXXVII

作者： Cho, Yeongchan Choi, Seongjeon Ahn, Hungbae Park, Sangoh Kim, Dongho Yang, Seunghune Samsungjeonja Ro 1 Hwaseong Si 18448 Gyeonggi Do South Korea

ISBN: (纸本)9781510672130;9781510672123

It is crucial to predict hard failure in photolithography process to determine design rules and process condition in the product development stage. Accurate prediction of hard failures through simulation have powerful effects such as shortening the product development period and improving mass production yield. Previously, parameters used to determine whether a pattern is expected to fail include NILS (Normalized Image Log-Slope), image contrast, or chemical distribution in the photoresist. However, these methods are almost infeasible because the accuracy becomes low as process condition changes and calibration process of chemical distribution is too complicated. In this paper, a novel method using optical parameters and machine learning is proposed to predict hard failures of ADI (After Development Inspection) patterns, and this methodology was evaluated in the process of applying inorganic photoresist.

关键词： Semiconductor Failure Prediction Machine Learning optical Parameters EUV Inorganic PR

来源：评论

学校读者我要写书评

暂无评论

Potential of controlling the steel-making process in electric arc steel-making furnaces to optimize technical and economic performance

引用

METALLURGIST 2024年第4期68卷 485-492页

作者： Lyulyakin, A. P. Tverskoy, A. B. Zezyulin, A. V. Gusev, M. P. Sedukhin, V. V. Matvenov, M. E. Gavrilov, I. Yu JSC JEVRAZ ZSMK Novokuznetsk Russia Sberbank Moscow Russia

The article describes modern methods for controlling and optimizing the energy mode of melting in electric arc furnaces and units for out-of-furnace steel processing using optical emission spectroscopy systems. These systems enable the determination of melt and slag temperatures, plasma temperatures in the arc combustion area, and slag composition, as well as the analysis of emission intensity from the melt and slag surfaces. The analysis revealed that depending on the range of steel to be smelted and the peculiarities of smelting technology at a particular electric arc steel-making furnace, control systems for smelting monitoring can be developed according to the obtained indicators of one or a combination of the abovementioned parameters.

关键词： Electric arc furnace optical emission spectroscopy Radiation chemical composition Slag Steel

来源：评论

学校读者我要写书评

暂无评论

Regulation crystal phase of Ca2Fe2O5 by synthesis method for efficient hydrogen production in photo-assisted chemical looping process

引用

FUEL 2025年 394卷

作者： Shu, Zhimei Xu, Tingting Xiao, Jiayi Chen, Weiqi Liu, Dong Nanjing Univ Sci & Technol Sch Energy & Power Engn MIIT Key Lab Thermal Control Elect Equipment Nanjing 210094 Peoples R China Nanjing Univ Sci & Technol Sch Energy & Power Engn Adv Combust Lab Nanjing 210094 Peoples R China

The influence of synthesis methodologies on the photothermal catalytic efficacy of brownmillerite Ca2Fe2O5 in the photo-assisted chemical looping reforming with water splitting (CLRWS) was delineated in this study. Combined with the synthesis methods' effects on the crystal structure, surface morphology, thermochemical and optical properties of samples, the probable reinforcement mechanism of introducing light into the CLRWS process was elucidated. It was demonstrated that the incorporation of light in CLRWS substantially boosted H2 production, with a striking enhancement from 0.56 mmol center dot gOC-1 in thermal catalysis to 3.35 mmol center dot gOC conditions for mechanochemically synthesized Ca2Fe2O5. Comparative analysis of sol-gel (SG-CFO), coprecipitation (CP-CFO), and mechanochemical (MC-CFO) methods revealed that phase purity and grain size were critical factors of lattice oxygen activity and the bandgap energy and electron-hole recombination rate in photothermal catalysis. SG-CFO exhibited superior phase purity, crystallinity and effective electron-hole pair separation, achieving an 84.2 % fuel conversion and a 6.8 mmol center dot gOC-1 hydrogen yield at 800 degrees C with light, eclipsing the 65.6 % and 5.05 mmol center dot gOC-1 yields recorded at 850 degrees C in the absence of light. Moreover, under light conditions, the H2 production of MC-CFO was 5.98 times greater than that under dark conditions, primarily due to its small grain size and high charge separation efficiency. The CP-CFO demonstrated the narrowest band gap (1.86 eV) coupled with a wider spectral absorption range relatively, resulting in the most pronounced photothermal effect. This research underscored the imperative of judicious synthesis method selection in the quest for highperformance photothermal catalysts for sustainable H2 generation.

关键词： Synthesis methods Photothermal Catalysis Hydrogen Production chemical Looping Reforming with Water Splitting (CLRWS)

来源：评论

学校读者我要写书评

暂无评论

Research on magnetic cleanliness control technology in the assembly process of satellite optical platform

Research on magnetic cleanliness control technology in the a...

引用

2024 International conference on Physics, Photonics, and optical Engineering, ICPPOE 2024

作者： Ding, Qin Fan, Qingmei Qiu, Zengshuai Li, Yan Zhang, Yong Wang, Xiaomin Zhao, Hu Cheng, Cheng Wang, Ying DFH Satellite Co. Ltd. Beijing China Institute of Spacecraft System Engineering Beijing China

ISBN: (数字)9781510689121

ISBN: (纸本)9781510689114

As the demand for electromagnetic field space exploration missions increases, the requirements for the magnetic cleanliness of the entire spacecraft become increasingly stringent. This paper takes the ultra-high magnetic cleanliness assembly requirements of the Macau Science satellite-1-A optical platform as the research goal and conducts research on magnetic cleanliness control technology during the optical platform assembly process. It analyzes that the main magnetic cleanliness control elements during the optical platform assembly process include Assembly tools, multi-layer insulation component production tools, accessories and production methods, etc., thermal control lead routing loop current. In view of the above magnetic cleanliness control elements, a non-magnetic material assembly tool was produced, a low-magnetic multi-layer insulation component production method and a thermal control lead routing method based on reverse twisted pairing were designed. After the implementation of the above measures, the magnetic cleanliness can be improved by 3 orders of magnitude, meeting the requirements for high-precision magnetic field measurement of the entire satellite. © 2025 SPIE.

关键词： process control

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：