Article
Chemistry, Applied
Jun Hu, Yangyang Li, Yanping Zhen, Mingshu Chen, Huilin Wan
Summary: In this study, the surface characteristics of Cu-based catalysts during H-2 reduction and CO2 hydrogenation were investigated using various surface analysis techniques. It was found that Al2O3 can stabilize Cu+ while Cu/ZnO samples gradually had Cu nanoparticles covered by a highly defective ZnOx overlayer during H-2 reduction.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Matjaz Finsgar, Dusko Cakara
Summary: This work presents the surface analytical characterization of the corrosion inhibitor MBTH for zinc, including the determination of its parent ion signal, investigation of the surface layer properties, and revelation of the growth mechanism of the adsorbates.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Antonius Armanious, Bjorn Agnarsson, Anders Lundgren, Vladimir P. Zhdanov, Fredrik Hook
Summary: This study demonstrates a new method to quantify the dry mass of various adsorbates, including rigid and nonrigid systems, in a liquid environment using the kinematic-viscosity matching approach with mechanical resonators. The method also allows for investigating the mechanical properties of adsorbates and their attachment to surfaces without the need for complementary techniques, expanding beyond mass determination.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Alexandr Belosludtsev, Anna Sytchkova, Naglis Kyzas, Ignas Bitinaitis, Rimantas Simniskis, Ramutis Drazdys
Summary: The study demonstrates that transmittance broadband monitoring is a reliable method for accurately estimating the minimum thickness at which a silver film becomes continuous, and can distinguish between different stages of film growth clearly. By selecting monitoring wavelengths appropriately, the nucleation and percolation processes of silver films can be effectively monitored.
Article
Nanoscience & Nanotechnology
Felix Hilpert, Pei-Chun Liao, Evanie Franz, Vanessa M. Koch, Lukas Fromm, Ece Topraksal, Andreas Goerling, Ana-Suncana Smith, Maissa K. S. Barr, Julien Bachmann, Olaf Brummel, Joerg Libuda
Summary: Solution-based atomic layer deposition (sALD) enables the preparation of thin films on nanostructured surfaces with precise control of film thickness and homogeneity. In this study, a sALD process was developed to deposit CuSCN films on a Si substrate using CuOAc and LiSCN precursors. The film growth behavior was characterized using AFM, NN analysis, ellipsometry, and in situ IR spectroscopy combined with DFT calculations. The results showed that CuSCN films grew as three-dimensional spherical nanoparticles on a pre-formed 2D layer, with increasing particle density and size as the cycle number increased. The film mainly consisted of the beta- CuSCN phase, along with a small fraction of the alpha-CuSCN phase and defect sites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Qiao Wang, Hongchang Wu, Yanrong Wang, Jianpeng Li, Yifan Yang, Xu Cheng, Yibing Luo, Beixi An, Xiaojun Pan, Erqing Xie
Summary: The study synthesized yolk-shell Sb2O3/WO3 gas sensor and investigated its excellent performance in acetone gas detection. The sensor showed rapid response, low detection limit, and superior selectivity towards acetone.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Luntao Wang, Sandrine Zanna, Dimitri Mercier, Vincent Maurice, Philippe Marcus
Summary: The mechanisms of initial oxide growth on the equiatomic CoCrFeMnNi high entropy alloy were investigated using X-ray photoelectron spectroscopy. Oxides of Cr(III), Mn(III), Fe(III), Co(II) were formed at 100°C, and Mn(II) was formed at 200°C. The quantitative data revealed a transition mechanism from selective initial oxidation to 3D kinetically-controlled growth, leading to stratification of the oxide film. The formation of a Co-rich outer layer above the Cr-rich inner layer suggests cationic outward oxide growth supported by the stoichiometry of the film.
Article
Engineering, Environmental
Byeong Jun Cha, Ji Yoon Choi, Yujing Ji, Shufang Zhao, Soong Yeon Kim, Soo Hyun Kim, Young Dok Kim
Summary: This study provides molecular level information about the problems that may occur when supported Fe-oxide catalysts are used for H2S removal, and details how these problems can be avoided.
CHEMICAL ENGINEERING JOURNAL
(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, 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
Biotechnology & Applied Microbiology
Ahmed Mosa, Ahmed A. Taha, Marwa Elsaeid
Summary: This study evaluated the effects of different sources of humic acid on the remediation of polluted soil. The results showed that humic acid extracted from wheat straw had the best performance in both in-situ and ex-situ remediation, with higher surface reactivity. The study also revealed the impact of humic acid on the extractability of PTEs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
S. Balamurugan, N. Naresh, I Prakash, N. Satyanarayana
Summary: The study synthesized 0-5 wt% Li2O loaded NiFe2O4/SiO2 composite aerogels, showing that the addition of small Li2O wt.% enhances the electrical conductivity. XPS analysis revealed capacity fading mainly comes from irreversible Li2SiO2 accumulation, with metal to metal oxide conversion being partially reversible.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
LingLing Yao, Can Lei, Shengxiong Huang, Qian He, Zehao Qian, Wei Luo, Xiangzhe Yan, Tao Wang, Mao Xia, Nan Zhou, Zhi Zhou
Summary: In this study, Ni-Fe/CaO-Al2O3 catalysts with different Ni/Fe ratios were synthesized using in-situ and ex-situ methods. The effect of products distribution in Chinese herb residue (CHR) catalytic pyrolysis by these methods was investigated. The results showed that in-situ NiFe-3 group had the highest content of aromatic compounds (59.68%) and the lowest content of aliphatic compounds (17.67%), benefiting the extraction of chemical raw materials from pyrolysis oil. CaO in the catalyst effectively reduced the acid content and corrosion of pyrolysis oil. Ex-situ catalytic experiments revealed that higher Ni and CaO content had synergistic catalytic action, promoting the water-gas shift reaction and the generation of H2. In-situ catalysis was mainly used for pyrolysis oil upgrading, while ex-situ catalysis promoted secondary pyrolysis of pyrolysis products and improved the quality of pyrolysis oil. This work provides references for the difference and high value utilization of biomass pyrolysis through different catalytic methods.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Physical
Angela Strass-Eifert, Thomas L. Sheppard, Christian D. Damsgaard, Jan-Dierk Grunwaldt, Robert Guttel
Summary: Designing stable materials for harsh reaction conditions is challenging in catalysis, but HZSM-5 supported cobalt catalysts with encapsulated or exterior cobalt nanoparticles show resistance to sintering even after prolonged operation under CO hydrogenation conditions. In situ environmental TEM experiments demonstrate the high sintering resistance of cobalt nanoparticles up to 700°C, indicating the potential for preparing sinter-stable catalysts for harsh reaction environments.
Article
Engineering, Electrical & Electronic
Renren Xu, Jiaxin Yao, Gaobo Xu, Yanzhao Wei, Huaxiang Yin, Qingzhu Zhang, Guoliang Tian, Yanrong Wang, Gangping Yan, Jinjuan Xiang, Weihai Bu, Yongqin Wu, Zhenhua Wu, Jun Luo, Wenwu Wang
Summary: Adding interfacial Al2O3 doping can modulate the dielectric and electrical properties, meeting the criteria required for gate electrode p-type effective work function (EWF).
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Chemistry, Multidisciplinary
Mohamed Eita, Abdulrahman El Labban, Federico Cruciani, Anwar Usman, Pierre M. Beaujuge, Omar F. Mohammed
ADVANCED FUNCTIONAL MATERIALS
(2015)
Article
Chemistry, Multidisciplinary
Ghada H. Ahmed, Shawkat M. Aly, Anwar Usman, Mohamed S. Eita, Vasily A. Melnikov, Omar F. Mohammed
CHEMICAL COMMUNICATIONS
(2015)
Article
Nanoscience & Nanotechnology
Mohamed Eita, Lars Wagberg, Mamoun Muhammed
ACS APPLIED MATERIALS & INTERFACES
(2012)
Article
Biochemistry & Molecular Biology
Emily D. Cranston, Mohamed Eita, Erik Johansson, Julia Netrval, Michaela Salajkova, Hans Arwin, Lars Wagberg
Article
Chemistry, Physical
Mohamed Eita, Hans Arwin, Hjalmar Granberg, Lars Wagberg
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2011)
Article
Chemistry, Physical
Mohamed Eita, Ramy El Sayed, Mamoun Muhammed
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2012)
Article
Chemistry, Physical
Mohamed Eita, Lars Wagberg, Mamoun Muhammed
JOURNAL OF PHYSICAL CHEMISTRY C
(2012)
Article
Chemistry, Physical
Shawkat M. B. Aly, Mohamed Eita, Jafar I. Khan, Erkki Alarousu, Omar F. Mohammed
JOURNAL OF PHYSICAL CHEMISTRY C
(2014)
Article
Chemistry, Multidisciplinary
Ramy El-Sayed, Mohamed Eita, Asa Barrefelt, Fei Ye, Himanshu Jain, Mona Fares, Arne Lundin, Mikael Crona, Khalid Abu-Salah, Mamoun Muhammed, Moustapha Hassan
Article
Materials Science, Paper & Wood
Hjalmar Granberg, Ludovic G. Coppel, Mohamed Eita, Eduardo A. de Mayolo, Hans Arwin, Lars Wagberg
NORDIC PULP & PAPER RESEARCH JOURNAL
(2012)
Article
Chemistry, Multidisciplinary
T. Burks, A. Uheida, M. Saleemi, M. Eita, M. S. Toprak, M. Muhammed
SEPARATION SCIENCE AND TECHNOLOGY
(2013)
Article
Chemistry, Multidisciplinary
Mohamed Eita, Anwar Usman, Ala'a O. El-Ballouli, Erkki Alarousu, Osman M. Bakr, Omar F. Mohammed
Article
Chemistry, Physical
Mohamed Eita
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.