Article
Engineering, Chemical
Sara A. Mahdy, Soha A. Abdel-Gawad, Rabab M. El-Sherif, I. M. Ghayad
Summary: The performance of 5-phenyl-1H-tetrazole (PTAH) and 5-(4-pyridyl)-1H-tetrazole (PyTAH) as corrosion inhibitors on copper and commercial brass in simulated seawater containing 3.5% NaCl was investigated. The results showed that PTAH exhibited better corrosion inhibition efficiency with 97% for copper and approximately 96% for brass at an optimal concentration of 0.01 M. Surface investigations revealed that the presence of PTAH significantly protected the copper and brass surfaces. The Langmuir adsorption isotherm indicated physiochemical adsorption of the inhibitors on the sample surfaces, while the Arrhenius plot demonstrated an increase in corrosion reaction activation energy after the addition of the inhibitor, indicating its inhibitive effect on copper and brass surfaces.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Seho Sun, Kangchun Lee, Ganggyu Lee, Yehwan Kim, Sungmin Kim, Junha Hwang, Hyungoo Kong, Kyung Yoon Chung, Ghulam Ali, Taeseup Song, Ungyu Paik
Summary: This article introduces an Fe-substituted SiO2 material that improves colloidal stability in low-defect tungsten CMP applications by controlling the dissolution-reprecipitation replacement process of Fe and Si ions in the lattice, thereby enhancing the performance of W CMP.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Chengyu Han, Juan Li, Jianglong Shen
Summary: With the rapid development of industry, heavy metal pollution has seriously damaged the health of soil and poses a threat to human health through the food chain. However, existing research mainly focuses on selecting heavy metal passivation materials without considering the intrinsic mechanisms of different compound functional groups in soil passivation.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Dongsen Zheng, Jianzhong Wang, Yingxian Duo, Zhuqing Fang, Chuang Yu, Meizhuang Qiao, Jiping Liu
Summary: This paper focuses on the pyrolysis behavior of 5-amino-1 H-tetrazole (5AT) and investigates the catalytic effects of nitrocellulose (NC) and potassium nitrate (KNO3) on the thermal decomposition mechanism and kinetics behavior of 5AT. The results suggest that adding NC simplifies the degradation process of 5AT and KNO3 decreases the activation energy and changes the reaction model. These findings provide valuable guidance for improving the design of environmentally friendly pyrotechnics.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Materials Science, Multidisciplinary
Hongguang Deng, Min Zhong, Wenhu Xu
Summary: This study investigated the effects of different dispersing reagents on ultrasonic assisted chemical mechanical polishing (UV-CMP) of sapphire. The results show that ultrasonic and polyethylene glycol can synergistically promote the chemical reaction and sapphire removal rate, while sodium polyacrylate and sodium hexametaphosphate will inhibit the chemical reaction. The optimal synergistic effects of chemical and mechanical action between abrasives and sapphire surface are achieved at a polyethylene glycol concentration of 0.2%.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Organic
Masahiko Seki, Yusuke Takahashi
Summary: Highly convergent synthesis of angiotensin II receptor blockers has been achieved through late-stage C-H arylation using functionalized aryl bromides. Different reaction conditions were found to lead to distinct coupling products during the arylation reaction.
SYNTHESIS-STUTTGART
(2021)
Article
Chemistry, Physical
Po-Fan Lin, Dinh-Phuc Tran, Hung-Che Liu, Yi-Yi Li, Chih Chen
Summary: This study explores a new low-temperature method for copper-to-copper direct bonding and quantitatively evaluates the bonding quality through microstructural analysis. It is found that the bonding quality of chemically mechanically planarized (CMP) copper films is superior to electropolished copper films. This new method allows for shorter bonding time and has the potential to reduce the thermal budget and manufacturing cost of current 3D ICs packaging technology.
Article
Electrochemistry
Antonella Privitera, Francesco Porcelli, Daniele Paoloni, Luca Persichetti, Giovanni Sotgiu, Alessandro Ruocco, Giovanni Capellini, Armida Sodo
Summary: The inhibitive effect of the non-toxic compound 5-Phenyl-1H-tetrazole (PT) against copper-alloy corrosion in NaCl 3 wt% is compared with the toxic compound 1H-Benzotriazole (BTA) using multiple techniques. Both PT and BTA show comparable inhibition efficiencies, but PT acts at a much lower concentration (1 mM compared to 10 mM). Composition and morphology analysis reveal different inhibition mechanisms and patina compositions for the two inhibitors. PT shows promise as a replacement for toxic BTA in preventing bronze archaeological and artistic objects corrosion.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Review
Materials Science, Multidisciplinary
Jenasree Hazarika, Apeksha Gupta, Prasanna Venkatesh Rajaraman
Summary: This review paper discusses the post-CMP cleaning process in integrated circuits fabrication. It covers the types of contaminants and defects generated during the process, as well as the various cleaning methods and chemistries employed. The PVA brushing method is elaborated on in detail, and different materials' cleaning methods are summarized.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Mao Sun, Liang Jiang, Yuan Wu, Yushan Chen, Qiuyu Li, Linmao Qian
Summary: Electrochemical FABrication (EFAB) is capable of creating intricate metal microstructures. Chemical mechanical polishing (CMP) is crucial for achieving flatness and desired surface quality in EFAB. By tuning the concentration of K2S2O8 to 20 mM and using ethylenediamine sulfate as the complexing agent, benzotriazole and sodium dodecyl benzene sulfonate as corrosion inhibitors, a satisfactory material removal rate (MRR) selectivity and surface quality can be achieved. A two-step planarization method involving lapping and CMP was proposed to significantly reduce step height and improve surface roughness of Cu/Ni microstructures.
MICROELECTRONIC ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Noriaki Watanabe, Kaori Takahashi, Ryota Takahashi, Kengo Nakamura, Yusuke Kumano, Kohei Akaku, Tetsuya Tamagawa, Takeshi Komai
Summary: The novel chemical stimulation method using chelating agents significantly enhances the permeability of rock fractures, creating voids under confining stress and avoiding the challenges associated with traditional methods. Research results demonstrate a new approach for chemical stimulation.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Medicinal
Nazariy Pokhodylo, Nataliya Finiuk, Olha Klyuchivska, Rostyslav Stoika, Vasyl Matiychuk, Mykola Obushak
Summary: In this study, a novel N-(5-benzylthiazol-2-yl) amide compound 3d was designed and synthesized. It exhibited significant anticancer activity against various tumor cell lines, particularly chronic myeloid leukemia cells. Compound 3d also caused DNA damage and induced apoptosis in leukemia cells.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Yang Chen, Aoli Wei, Xiangyu Ma, Tianyu Wang, Ailian Chen
Summary: In this work, copper-incorporated dendritic mesoporous silica (D-mSiO(2)) nano-particles were synthesized, which resulted in defect-free and atomically planarized dielectric film surfaces and improved removal efficiency. The Cu2+/H2O2 heterogeneous Fenton-like system contributed to the formation of highly reactive species and enhanced material removal.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Karima Boudhar, Mahdi Debieche, Ahcene Serhane, Abdelhamid Zeghdaoui
Summary: The N-phenyl-3-para nitro phenyl isoxazolidine-5-carbonitrile compound has been synthesized and characterized via single-crystal X-ray diffraction, with investigations into Raman spectroscopy and density functional theory.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Multidisciplinary
Chathuri J. Kombala, Aikaterini Kotrotsou, F. William Schuler, Jorge de la Cerda, Jacqueline C. Ma, Shu Zhang, Mark D. Pagel
Summary: AcidoCEST MRI can measure the extracellular pH of the tumor microenvironment using a nanoscale CEST agent, reducing the need for high delivery concentrations. The polymer agent showed superiority over the monomer agent and iopamidol in terms of concentration requirement for acidoCEST MRI studies.