Article
Chemistry, Physical
G. Greczynski, L. Hultman
Summary: The peak position of C 1s can be affected by the vacuum level alignment and differential charging. However, recent studies suggest that differential charging may not be the general cause of C 1s peak shifts. Experimental results confirm that the binding energy of C 1s peaks in metal foils is determined by their work function values.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
G. Greczynski, L. Hultman
Summary: Correct referencing of binding energy (BE) spectra for insulating samples in XPS analyses is a major challenge. The Ar 2p signal of implanted Ar is often used, but it is not an effective solution due to large variations in BE values between samples. The number of valence electrons available for screening and the formation of Ar-N and Ar-C complexes contribute to the observed spread in Ar 2p3/2 BE values. The method is also unreliable for two-phase samples.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Vincent Fernandez, David Morgan, Pascal Bargiela, Neal Fairley, Jonas Baltrusaitis
Summary: Cellulose undergoes new chemistry in response to XPS, but recent studies have shown that this can be detrimental to some materials. This study analyzes cellulose spectra obtained during a degradation study, revealing that cellulose degrades through the creation of carbon chemistry involving C-O, C--O and O-C--O. The findings are relevant to any material analyzed by XPS dependent on hydrogen bonds. The analysis techniques are based on an informed vectorial approach, utilizing mathematical methods such as Principal Component Analysis and linear analysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
G. Greczynski, L. Hultman
Summary: This study investigates the effects of sample storage environment on the contamination of surfaces for XPS studies. Modeling techniques were used to analyze the types and quantities of surface contaminants under different storage conditions.
Article
Environmental Sciences
Yueh-Feng Li, Ching-Yao Hu, Yu-Chi Lee, Shang-Lien Lo
Summary: This study found that adding ZnCl2 can increase the efficiency of EC for PFOA, and the longer the carbon chain of PFA, the better the removal by EC. Chemical bonding between aluminum and fluoride was observed. The main functions of ZnCl2 were to prevent the rise in pH and improve flotation.
Article
Multidisciplinary Sciences
G. Greczynski, L. Hultman
Summary: Chemical state analysis in X-ray photoelectron spectroscopy (XPS) relies on assigning well-defined binding energy values to core level electrons originating from atoms in particular bonding configurations. Here, direct evidence is presented for the violation of this paradigm, as the C 1s peak due to C-C/C-H bonded atoms from adventitious carbon (AdC) layers splits into two distinctly different contributions. This finding exposes fundamental problems with the reliability of reported XPS data and suggests discontinuing the use of adventitious carbon in XPS.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Arisara Panthawan, Nidchamon Jumrus, Panupong Sanmuangmoon, Winai Thongpan, Tewasin Kumpika, Wattikon Sroila, Ekkapong Kantarak, Adisorn Tuantranont, Pisith Singjai, Wiradej Thongsuwan
Summary: Copper-iron oxide composite films were deposited on quartz substrate using a sparking process. The film with the lowest band gap energy was observed after annealing at 700 degrees C, showing higher photocatalytic activity than TiO2.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Atsushi Hariki, Keisuke Higashi, Tatsuya Yamaguchi, Jiebin Li, Curran Kalha, Manfred Mascheck, Susanna K. Eriksson, Tomas Wiell, Frank M. F. de Groot, Anna Regoutz
Summary: This paper explores the satellites of the Ti 1s and 2p core level spectra of SrTiO3 and TiO2 using hard x-ray PES. The theoretical analysis emphasizes the importance of higher-order Ti-O charge-transfer processes and provides a robust prescription for using the computationally cheap cluster model in fitting analyses of core level spectra.
Article
Chemistry, Physical
Jorge Alejandro Torres-Ochoa, Dagoberto Cabrera-German, Orlando Cortazar-Martinez, Mariela Bravo-Sanchez, Gustavo Gomez-Sosa, Alberto Herrera-Gomez
Summary: The photoemission spectra of Cu 2p were studied for a metallic ultra-thin film and the initial oxidation stages. The validity of the proposed peak-fitting procedures was assessed by analyzing annealed films. Accurate determination of Cu1+ and Cu2+ states and quantification of O 1s species were achieved, resulting in compositions close to stoichiometric values. The relative proportion of Cu1+ to Cu0 states was quantified despite their strong overlap using the proposed peak-fitting analysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
Adi Vinegrad, Heftsi Ragones, Nishani Jayakody, Gilat Ardel, Meital Goor, Yossi Kamir, Moty Marcos Dorfman, Alexander Gladkikh, Larisa Burstein, Yonatan Horowitz, Steve Greenbaum, Diana Golodnitsky
Summary: In this research, polylactide-polyethylene-oxide blended membranes were developed and printed using fused-filament fabrication, with an ionic liquid infused to produce quasi-solid polymer electrolytes. The study found that increasing the content of polyethylene oxide led to a significant improvement in bulk conductivity of the membranes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Yaoqi Pang, Xiaohong Zhou, Evgeny Vovk, Cairu Guan, Shenggang Li, Alexander P. van Bavel, Yong Yang
Summary: This study combines DFT calculations with experimental results to reveal the surface structure of La2O3 and its catalytic mechanism in OCM reaction under realistic conditions. Experimental data and simulations show that the (001) and (011) surfaces best match the experimental data, suggesting they are likely exposed on La2O3 surfaces.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Chenghsing Li, Daolin Cai, Weili Liu, Wencheng Fang, Zijing Cui, Zhitang Song
Summary: This article investigates the GeSe-based chemical mechanical polishing process for improving the three-dimensional structure of phase-change memory devices. Different chemical substances are used to interact with GeSe in order to achieve better performance. Material characterization and analysis are conducted through various methods.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Alvaro J. Lizarbe, George H. Major, Vincent Fernandez, Neal Fairley, Matthew R. Linford
Summary: X-ray photoelectron spectroscopy (XPS) is a widely used and important method for chemically analyzing surfaces. However, incorrect XPS data analysis has become a common issue in scientific literature. This Insight Note discusses the fitting of the Al 2p peak envelope from a sample of aluminum foil with an oxide layer, including methods for isolating the sample, baseline choice, and fitting of oxide and metal signals.
SURFACE AND INTERFACE ANALYSIS
(2023)
Article
Chemistry, Physical
Daniel Wolverson, Benjamin Smith, Enrico Da Como, Charles Sayers, Gary Wan, Luca Pasquali, Mattia Cattelan
Summary: A simple first-principles approach is used to estimate the core level shifts observed in X-ray photoelectron spectroscopy for the 4f electrons of Hf, Ta, W, and Re. The results show that this approach can provide insights into modifications of the commensurate charge density wave and the surface termination of MXenes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Vincent Fernandez, Neal Fairley, Jonas Baltrusaitis
Summary: A new data processing method combining the creation of information vectors and vector base change has been proposed for reliable extraction of chemical information from XPS spectra, showing potential for expanded possibilities in chemical environment analysis.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)