Article
Engineering, Environmental
Khalid A. Alamry, Ruby Aslam, Ajahar Khan, Mahmoud A. Hussein, Nada Y. Tashkandi
Summary: The study aims to develop green corrosion inhibitors to protect mild steel during pickling and descaling treatment. The proposed compounds showed significant inhibitory effects at higher concentrations and temperatures. Electrochemical tests revealed that the inhibitors improved corrosion charge transfer resistance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Physical
Avik Halder, Cristina Lenardi, Janis Timoshenko, Antonija Mravak, Bing Yang, Lakshmi K. Kolipaka, Claudio Piazzoni, Sonke Seifert, Vlasta Bonacic-Koutecky, Anatoly Frenkel, Paolo Milani, Stefan Vajda
Summary: Subnanometer copper tetramer-zirconia catalysts are highly efficient for CO2 hydrogenation and conversion to methane. The morphology of the support, controlled through cluster size and substrate morphology, plays a crucial role in optimizing catalytic performance. The interaction between Cu clusters and a nanostructured film support is key to the catalyst's higher activity.
Article
Chemistry, Physical
Jianjun Zhang, Liuyang Zhang, Wang Wang, Jiaguo Yu
Summary: S-scheme photocatalysts have great potential in solar fuel production. In situ irradiated X-ray photoelectron spectroscopy (ISIXPS) is an effective technique to study electron transfer pathways in S-scheme heterojunctions. This Perspective provides an introduction to the development and formation mechanism of S-scheme photocatalysts, explains the principles of XPS and ISIXPS measurements, and discusses their applications in confirming interfacial electron transfer in S-scheme heterojunctions. Suggestions for future research on the utilization of ISIXPS in S-scheme heterojunctions are proposed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Jiuxiang Dai, Zhongmiao Gong, Shitong Xu, Yi Cui, Meiyi Yao
Summary: Zirconium alloys are commonly used in the fabrication of nuclear fuel cladding due to their favorable properties. However, the initial oxidation behavior and the role of niobium in zirconium alloys are still challenging subjects.
ACTA PHYSICO-CHIMICA SINICA
(2022)
Article
Polymer Science
Kamlesh Bornani, Nicholas F. Mendez, Abdullah S. Altorbaq, Alejandro J. Muller, Yueqian Lin, Eric Zhonghang Qu, Kai Zhang, Sanat K. Kumar, Linda S. Schadler
Summary: In this study, the migration of silica nanoparticles from a poly(ethylene oxide) melt into the interlamellar region was tracked using in situ atomic force microscopy. The results confirmed that under slow crystallization conditions, the nanoparticles are rejected by the growing crystal as defects and can be tracked as they migrate into the amorphous zones. The study also extended the atomic force microscopy technique to estimate lamellar growth rates, which correlated with spherulite growth rates determined by polarized light optical microscopy.
Article
Chemistry, Physical
Xin Zhang, Wenpo Li, Xiuli Zuo, Bochuan Tan, Cheng Xu, Shengtao Zhang
Summary: Experimental and theoretical studies show that Davidia involucrata leaf extract can inhibit copper effectively in sulfuric acid solution, with an inhibition efficiency of up to 90%. Bonding information was detected using FTIR and XPS, and the formation of an effective film by DLE to protect copper was observed through SEM and AFM. Langmuir adsorption model is the most suitable for illustrating the adsorption mechanism of DLE on copper surface, supported by quantum chemical calculation and molecular dynamics simulation.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Priya Kumari Paul, Raj Kumar Mehta, Mahendra Yadav, I. B. Obot
Summary: Two triazepine derivatives, AITT and EHTC, were successfully synthesized and demonstrated to be effective corrosion inhibitors for mild steel in 15% HCl medium. The inhibitors showed promising inhibiting performance, with AITT exhibiting higher efficiency than EHTC. The adsorption of the inhibitors on the metal surface played a key role in the protection mechanism. The inhibitors were found to be mixed-type inhibitors, as supported by potentiodynamic polarization experiments and Langmuir Adsorption isotherm analysis. The application of the inhibitors resulted in significant improvement in the damaged surface, as observed through surface topographical analysis. XPS analysis confirmed the presence of the inhibitors on the inhibited metal surface. Computational methods, including Monte-Carlo Simulation, DFT, and Fukui calculations, further supported the experimental findings.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Instruments & Instrumentation
Abdulla Bin Afif, Anup L. Dadlani, Andreas Flaten, Markus Joakim Lid, Johannes Ofstad, Andreas Erbe, Peter Kollensperger, Jan Torgersen
Summary: This paper presents a detailed description of a flexible and portable atomic layer deposition (ALD) system for in situ Fourier transform infrared (FTIR) absorption spectroscopy studies. The system directly integrates with a commercial FTIR spectrometer to reduce complexity and optical losses. The system is validated for tracking the nucleation stage and ligand exchange during ALD growth.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Chemistry, Physical
Ambrish Singh, K. R. Ansari, M. A. Quraishi, Savas Kaya, Sultan Erkan
Summary: The paper discusses the synthesis of Guar gum and ethyl acrylate (GG-EEA) composite as a corrosion inhibitor for P110 steel in 15% HCl. The research findings indicate that GG-EEA composite has a higher corrosion inhibition performance compared to GG alone.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Lazar Rakocevic, Svetlana Strbac, Irina Srejic
Summary: The HER was examined on various glassy carbon-supported Au and PdAu electrodes in acid solution, with the 30minPd/10minAu/GC electrode showing the best catalytic activity. This electrode, consisting of 48% Pd and 65% Au, with the total coverage of the GC substrate with PdAu islands of 70%, exhibited remarkable high activity and stability, making it a promising catalyst for HER in acid solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Analytical
J. G. Rivera, R. Garcia-Garcia, E. Coutino-Gonzalez, G. Orozco
Summary: The electrochemical behavior of metallic rhenium in acid aqueous solution was studied, revealing a separation of the potential interval into hydrogen, double layer, and oxygen regions. The mechanism of hydrogen evolution reaction was identified as the Volmer-Heyrovsky reaction, while the double layer region's capacitance was controlled by adsorption of sulfate and hydroxide anions. The Tafel slope of the anodic branch in the oxygen region was found to be 130 mVdec(-1), with evidence of the f levels of Re (0) and the oxidation state of Re(I) provided by ex-situ XPS analysis.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Yin Caihong, Ambrish Singh, K. R. Ansari, Ismat H. Ali, Raman Kumar
Summary: This research explores the synthesis of three heterocyclic rings of pyrazol, pyran, and pyrimidine (Py-OH) in one single compound using a multicomponent synthesis approach and its application for the protection of tubular steel (Q235 steel) in acidizing solution. The results demonstrate that Py-OH exhibits a high inhibition performance of 94.46% and acts as a mixed type inhibitor, controlling the corrosion process under dynamic conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Ya-fei Chen, Hong Yin, Dong-lin He, Hai-feng Gong, Zhe-zhi Liu, Yun-qi Liu, Xian-ming Zhang, Wan-fen Pu
Summary: This study investigates the evolution of low temperature oxidized coke generated from the pyrolysis of ultra-heavy oil during in-situ combustion. The results show that low temperature oxidation leads to the formation of oxidation groups and promotes the evolution of aromatic structures and functional groups. Additionally, low temperature oxidation reactions have a significant impact on the morphology, oxidizability, and exothermicity of the coke.
Article
Chemistry, Physical
Ambrish Singh, K. R. Ansari, Abdullah K. Alanazi, M. A. Quraishi, Priyabrata Banerjee
Summary: The study investigated the inhibitory performance of maltodextrin (MDL) on P110 steel in a NACE brine solution saturated with CO2, showing MDL to be an environmentally friendly corrosion inhibitor. Various methods, including weight loss tests, electrochemical impedance spectroscopy, and potentiodynamic polarization, were used to analyze the inhibitory performance of MDL. Computational studies predicted neutral MDL molecules in the corrosive medium.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Physics, Applied
Jeremy Fleury, Luc Burnier, Andreas Schueler
Summary: This study investigates the optical and electronic properties of nanoporous amorphous molybdenum-doped tungsten trioxide thin films and demonstrates their potential for color neutral and spectral transmission control in electrochromic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Marcel Junige, Markus Loeffler, Marion Geidel, Matthias Albert, Johann W. Bartha, Ehrenfried Zschech, Bernd Rellinghaus, Willem F. van Dorp
Article
Electrochemistry
H. Wojcik, M. Junige, W. Bartha, M. Albert, V. Neumann, U. Merkel, A. Peeva, J. Gluch, S. Menzel, F. Munnik, R. Liske, D. Utess, I. Richter, C. Klein, H. J. Engelmann, P. Ho, C. Hossbach, C. Wenzel
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2012)
Article
Materials Science, Coatings & Films
Martin Knaut, Marcel Junige, Matthias Albert, Johann W. Bartha
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2012)
Article
Engineering, Electrical & Electronic
H. Wojcik, U. Merkel, A. Jahn, K. Richter, M. Junige, C. Klein, J. Gluch, M. Albert, F. Munnik, C. Wenzel, J. W. Bartha
MICROELECTRONIC ENGINEERING
(2011)
Article
Engineering, Electrical & Electronic
Martin Knaut, Marcel Junige, Volker Neumann, Henry Wojcik, Thomas Henke, Christoph Hossbach, Andre Hiess, Matthias Albert, Johann W. Bartha
MICROELECTRONIC ENGINEERING
(2013)
Article
Engineering, Electrical & Electronic
Sebastian Kilige, Irene Bartusseck, Marcel Junige, Volker Neumann, Johanna Reif, Christian Wenzel, Mathias Boettcher, Matthias Albert, M. Juergen Wolf, Johann W. Bartha
MICROELECTRONIC ENGINEERING
(2019)
Article
Materials Science, Coatings & Films
Matthew B. E. Griffiths, Zachary S. Dubrawski, Peter G. Gordon, Marcel Junige, Sean T. Barry
Summary: This survey focuses on known gold-containing chemical vapor deposition (CVD) and atomic layer deposition (ALD) precursors, collecting data on their volatilization and decomposition. A figure of merit (sigma) is used to assess thermal characteristics, with some gold ALD precursors showing high potential. Gold(I) compounds with certain oxidation states have good figures of merit, while beta -diketonates and beta -ketoiminates of gold are particularly promising with high sigma values. A potential synthetic route for these compounds may make them competitive as precursors.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Materials Science, Coatings & Films
Marcel Junige, Steven M. George
Summary: The study developed an area-selective molecular layer deposition (MLD) technique for repairing RIE-eroded aC hard masks and maintaining critical dimensions.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Nanoscience & Nanotechnology
Sabbir A. Khan, Dmitry B. Suyatin, Jonas Sundqvist, Mariusz Graczyk, Marcel Junige, Christoffer Kauppinen, Anders Kvennefors, Maria Huffman, Ivan Maximov
ACS APPLIED NANO MATERIALS
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
Marcel Junige, Tim Oddoy, Rositsa Yakimova, Vanya Darakchieva, Christian Wenger, Grzegorz Lupina, Julia Kitzmann, Matthias Albert, Johann W. Bartha
NANOTECHNOLOGY VII
(2015)
Article
Engineering, Electrical & Electronic
Christian Wenger, Julia Kitzmann, Andre Wolff, Mirko Fraschke, Christian Walczyk, Gregorz Lupina, Wolfgang Mehr, Marcel Junige, Matthias Albert, Johann W. Bartha
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2015)
Article
Engineering, Electrical & Electronic
Bruno Galizia, Patrick Fiorenza, Corrado Bongiorno, Bela Pecz, Zsolt Fogarassy, Emanuela Schiliro, Filippo Giannazzo, Fabrizio Roccaforte, Raffaella Lo Nigro
Summary: This study demonstrates the growth of oriented AlN thin films on 4H-SiC substrates using PE-ALD technique, and investigates the impact of NH3 plasma pulsing on the microstructure and orientation degree of the AlN layers. The structural characterization reveals different polymorphic structures depending on the NH3 plasma pulsing time, and electrical nanoscopic characterization shows a correlation between the AlN crystalline phases and the insulating properties.
MICROELECTRONIC ENGINEERING
(2024)
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)