Article
Nanoscience & Nanotechnology
Deok-Yong Cho, Ki-jeong Kim, Kug-Seung Lee, Michael Lubben, Shaochuan Chen, Ilia Valov
Summary: Thin layers inserted between a metal electrode and a solid electrolyte can modify the transport of mass and charge at interfaces and affect electrode reactions. Incorporating C films in functional materials can alter the host's chemical properties and device functionalities. Using X-ray spectroscopies, it was found that inserting graphene or ultrathin amorphous C layers in a Ta2O5/Ta system can tune its chemical and electronic structures, thereby fundamentally changing the resistive switching functionalities.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zhihua Yong, Karl-Magnus Persson, Mamidala Saketh Ram, Giulio D'Acunto, Yi Liu, Sandra Benter, Jisheng Pan, Zheshen Li, Mattias Borg, Anders Mikkelsen, Lars-Erik Wernersson, Rainer Timm
Summary: This study explores the correlation between the physicochemical properties of TiN bottom metal electrode and HfOx/TiN interface and the resistive switching behavior of RRAM devices, aiming to enhance the performance of stack integration. The research demonstrates that the concentration of oxygen vacancies in HfOx layer affects the band bending and the formation of a Schottky barrier, potentially enabling dense, large-scale, and low-power memory integration with the ultra-thin-HfOx/TiN device stack.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sobia Ali Khan, Geun Ho Lee, Chandreswar Mahata, Muhammad Ismail, Hyungjin Kim, Sungjun Kim
Summary: In this work, a ZnO-based resistive switching memory device is characterized using simplified electrical conduction models. The device exhibits uniform gradual bipolar resistive switching with good endurance and self-compliance characteristics. Complementary resistive switching is achieved by applying compliance current at negative bias and increasing voltage at positive bias.
Article
Optics
Umang Berwal, Vinod Singh, Rinku Sharma
Summary: Ternary oxides with cerium oxide as dopant are used for blue chip production of WLED's. Pyrochlore oxides Gd2Ti2-xCexO7 were prepared with different doping concentrations, and a pyrochlore structured phase was formed. Ce4+-> Ce3+ conversion affected the structural and luminescent properties, leading to improved PL emission and excitation spectra.
JOURNAL OF LUMINESCENCE
(2023)
Article
Engineering, Electrical & Electronic
Benjamin Meunier, Eugenie Martinez, Raquel Rodriguez-Lamas, Dolors Pla, Monica Burriel, Carmen Jimenez, Yoshiyuki Yamashita, Olivier Renault
Summary: This study investigated the switching mechanisms in LaMnO3+delta-based memristive devices with two different noble metal top electrodes using operando high-energy X-ray photoelectron spectroscopy (HAXPES), revealing the redox mechanism and characteristics changes in the devices under different resistance states. The presence of an inert electrode results in oxygen being released out of the lattice instead of reacting with the electrode. The HAXPES energy shifts induced by the electric field were used to probe the resistance drop inside the device at different positions and for different resistance states.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ashutosh Kumar, David Berardan, Diana Dragoe, Eric Riviere, Tomohiro Takayama, Hidenori Takagi, Nita Dragoe
Summary: This study presents detailed investigations of the structural, magnetic, and electronic transport properties of hole-doped high-entropy rare-earth manganites. The high-entropy samples, synthesized using the solid-state technique, show a change in crystal structure with increasing Sr substitution. A rhombohedral structure exhibits prominent ferromagnetic ordering, originating from the dominant double exchange mechanism. The electrical resistivity of high-entropy samples is larger than those of La1_xSrxMnO3, attributed to the enhanced structural distortion.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Zhihua Yong, Mamidala Saketh Ram, Karl-Magnus Persson, Gomathy Sandhya Subramanian, Lars-Erik Wernersson, Jisheng Pan
Summary: Titanium nitride and hafnium oxide stack, which are compatible with complementary-metal-oxide-semiconductor, have been widely used in resistive memory elements. This study compares HfOx grown using plasma enhanced atomic layer deposition (PEALD) and thermal atomic layer deposition (TALD) in terms of band alignment and electrical performances in the HfOx/PEALD TiN stacks. The findings show the significance of understanding the intricate details of the material stack, such as delta E-C difference and the presence of a thicker TiO2 interfacial layer, in affecting the device performance.
ADVANCED ELECTRONIC MATERIALS
(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
Materials Science, Ceramics
Amit Kumar Mauraya, Debashrita Mahana, Gaurav Jhaa, Bipul Kumar Pradhan, Shweta Tomer, Preetam Singh, Sunil Singh Kushvaha, Senthil Kumar Muthusamy, Sunil Singh Kushvaha, Senthil Kumar Muthusamy
Summary: Heterojunction-based gas sensors, constructed by combining vacuum evaporation and r.f. sputtering or atomic layer deposition techniques, show enhanced sensing characteristics and selectivity towards CO gas. The ZnO/SnO2 heterojunction exhibits 6-fold enhancement in sensing response compared to bare SnO2 films, with fast response time and low limit of detection.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Balaji P. Mandal, Kaustava Bhattacharyya, Jerina Hisham Zain, V Sudarsan, Sandeep Nigam, Chandrani Nayak, Avesh K. Tyagi
Summary: The study focused on the impact of disorder degree variation in the Y2Sn2-xZrxO7 series on the photocatalytic degradation of dye, revealing a phase transition from ordered pyrochlore to disordered fluorite. Structural characterization techniques showed a shift in composition structure and coordination environment with Zr content, affecting catalytic properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Physical
E. P. Antonova, A. V. Khodimchuk, E. S. Tropin, A. V. Fetisov, N. M. Porotnikova
Summary: The effect of electrode polarization on the electrochemical activity of La2NiO4+d and La1.9Ca0.1NiO4+d electrodes in contact with the Ce0.8Sm0.2O1.9 electrolyte is studied by impedance spectroscopy. Anodic polarization facilitates electrode reaction and decreases the polarization resistance. The effect of cathodic polarization differs between the electrodes: the polarization resistance of La2-NiO4+d electrode slightly increases, while the polarization resistance of La1.9Ca0.1NiO4+d electrode strongly decreases. The polarization mostly affects the low-frequency stage of the electrode reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yogesh Kumar, S. Tripathi, Mangla Nand, R. Jangir, V. Srihari, A. Das, R. Singh, U. Deshpande, S. N. Jha, A. Arya
Summary: This study investigated the effect of Nd doping on the structural, optical, and electronic properties of lanthanum monazite structure. Pure and Nd-doped LaPO4 powders were prepared and analyzed for their composition, oxidation states, crystal structure, and bandgaps. The results confirmed the successful substitution of Nd in the LaPO4 matrix and provided insights into the local structure using extended X-ray absorption fine structure analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mauricio Lopez Luna, Janis Timoshenko, David Kordus, Clara Rettenmaier, See Wee Chee, Adam S. Hoffman, Simon R. Bare, Shamil Shaikhutdinov, Beatriz Roldan Cuenya
Summary: The study investigates the structural and chemical evolution of oxide-supported iron nanoparticles during the activation stages and the CO2 hydrogenation reaction, revealing the preferential formation of iron surface oxides under reaction conditions. The results highlight the important role played by the oxide support in the final structure and composition of nanosized catalysts.
Article
Chemistry, Physical
Irene Ferrari, Alessandro Motta, Robertino Zanoni, Francesca Anna Scaramuzzo, Francesco Amato, Enrique A. Dalchiele, Andrea Giacomo Marrani
Summary: This study investigates the nature and interactions of oxygen functional groups in graphene oxide, providing insights into their electrochemical reduction energetics. Chemical modifications of graphene oxide under controlled electrochemical reduction conditions were studied to understand the contribution of single reactive oxygen functional groups. X-ray photoelectron spectroscopic analysis and theoretical modeling were used to characterize the various carbonaceous species involved in the rich chemistry of graphene oxide.
Article
Electrochemistry
Aida Raauf, David Graf, Yakup Gonullu, Praveen K. Sekhar, Michael Frank, Sanjay Mathur
Summary: The nanostructured thin film of Nd2Sn2O7 pyrochlore obtained through solution processing shows unprecedented selectivity towards hydrogen sensing, with the highest sensitivity towards H-2 detected at 300 degrees Celsius. The high efficiency and reproducibility of the investigated sensor devices indicate the potential of Nd2Sn2O7 based sensors for hydrogen safety applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Biology
D. Surmik, M. Dulski, B. Kremer, J. Szade, R. Pawlicki
Summary: Fossil bone cells were discovered in a Middle Triassic bone of the reptile Nothosaurus, showing morphological consistency with bone cells of modern vertebrates. Chemical analysis revealed the presence of hematite and goethite as the predominant mineral phases, possibly formed early due to local microenvironmental conditions. The absence of signals indicating organic molecules suggests that original bone cells underwent autolysis before or during mineralization.
HISTORICAL BIOLOGY
(2021)
Article
Chemistry, Physical
Katarzyna Balin, Marcin Wojtyniak, Mateusz Weis, Maciej Zubko, Bartosz Wilk, Ruizhe Gu, Pascal Ruello, Jacek Szade
Article
Toxicology
Anna Barbasz, Magdalena Ocwieja, Natalia Piergies, Dorota Duraczynska, Anna Nowak
Summary: The study investigated the toxicity of silver nanoparticles synthesized using antioxidants on human cells, finding that GAAgNPs were more toxic than AAgNPs, with the presence of stabilizing agents being the main factor influencing toxicity.
JOURNAL OF APPLIED TOXICOLOGY
(2021)
Article
Instruments & Instrumentation
Magdalena Szczepanik-Ciba, Tomasz Sobol, Jacek Szade
Summary: PHELIX is a new beamline at the National Synchrotron Radiation Centre SOLARIS in Krakow, utilizing soft X-rays with high resolving power and a wide range of spectroscopic methods. It is suitable for investigations of various materials and surface properties.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2021)
Article
Chemistry, Physical
Justyna Witkowska, Michal Tarnowski, Emilia Choinska, Marek Kulpa, Jacek Szade, Gerhard Raugh, Wojciech Swieszkowski, Tadeusz Wierzchon
Summary: The study showed that short-term contact with low-temperature plasma can shape the surface properties of the carbon coating, showing potential for medical applications.
Article
Biochemistry & Molecular Biology
Magdalena Laskowska, Anna Nowak, Mateusz Dulski, Peter Weigl, Thomas Blochowicz, Lukasz Laskowski
Summary: This article presents a potential TSD probe in the form of a nanocomposite, using spherical silica particles with attached 2-naphthalene methanol molecules with a predefined surface density. The phosphorescence properties of the obtained materials are confirmed through TSD experiments, discussing the route to develop phosphorescent sensors at silica surfaces based on the presented results.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Multidisciplinary Sciences
D. Kiphart, Y. Harkavyi, K. Balin, J. Szade, B. Mroz, P. Kuswik, S. Jurga, M. Wiesner
Summary: The study used a hybrid device with a topological insulator and a high-temperature superconductor to investigate proximity-induced superconductivity. Raman spectroscopy and charge transport experiments revealed important information about the proximity-induced superconducting gap and the reduced superconducting gap in the two materials.
SCIENTIFIC REPORTS
(2021)
Article
Soil Science
Slawomir Sulowicz, Anna Markowicz, Mateusz Dulski, Anna Nowak, Dorota Srodek, Slawomir Borymski
Summary: The study found that nanopesticides have a lower negative effect on soil microorganisms compared to traditional pesticides. The SiO2 20-30nm nanocarrier showed less impact on environmental risk and has better potential for use.
APPLIED SOIL ECOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Aleksandra Strach, Mateusz Dulski, Daniel Wasilkowski, Oliwia Metryka, Anna Nowak, Krzysztof Matus, Karolina Dudek, Patrycja Rawicka, Jerzy Kubacki, Natalia Waloszczyk, Agnieszka Mrozik, Sylwia Golba
Summary: Heavy metals and organic pollutants are not effectively removed or neutralized in the environment. Porous, spherical silica nanostructures with an active surface and open porosity have great potential for development. In this study, the surface of silica spheres was modified using a microwave field to enhance metal uptake potential. The modified carriers exhibited increased toxicity against bacteria and affected their antioxidant defense system, with the most significant effects observed for carriers treated for an extended period in a microwave field.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Andrii Fedorchuk, Magdalena Laskowska, Grzegorz Cempura, Adam Kruk, Anna Nowak, Mateusz Dulski, Malgorzata Kac, Oleksandr Pastukh, Piotr M. Zielinski, Jerzy Kubacki, Lukasz Laskowski
Summary: In this study, a novel nanocomposite material was synthesized by functionalizing the SBA-15 silica matrix with anchored iron phosphonate molecules and conducting thermal treatment. The obtained materials are of great interest for their unique structure and potential applications in catalysis, adsorption, and non-linear optics. Various characterization techniques were used to analyze the obtained materials.
Article
Engineering, Environmental
Slawomir Sulowicz, Slawomir Borymski, Mateusz Dulski, Anna Nowak, Kinga Bondarczuk, Anna Markowicz
Summary: Nanoformulation is important for reducing pesticide usage and their environmental impact. This study evaluated the risk of two nanopesticides with different nanocarriers using non-target soil microorganisms as biomarkers. The results showed that the nanopesticides had a smaller impact compared to pure captan, and using SiO2 as a nanocarrier had a faster recovery process.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Microbiology
Slawomir Borymski, Anna Markowicz, Anna Nowak, Krzysztof Matus, Mateusz Dulski, Slawomir Sulowicz
Summary: Recent advances in nanotechnology have enabled the emergence of precision farming, which involves the use of nanopesticides and nanoferilizers. Zinc-oxide nanoparticles serve as a source of zinc for plants, while copper-oxide nanoparticles have antifungal activity and may also provide copper ions as a micronutrient. However, excessive application of these metal-containing nanoparticles can pose a threat to non-target soil organisms. A study conducted a 60-day laboratory experiment to investigate the effects of zinc-oxide and copper-oxide nanoparticles on soil microorganisms. The results revealed significant and persistent effects exerted by copper-containing nanoparticles on non-target microbial communities, leading to detrimental rearrangements in microbial community structure and functions.
MICROBIOLOGICAL RESEARCH
(2023)
Article
Environmental Sciences
Bronislaw Psiuk, Jozef Wojsa, Anna Gerle, Tamara Pochwala, Jacek Szade, Jacek Podworny
ECOLOGICAL CHEMISTRY AND ENGINEERING S-CHEMIA I INZYNIERIA EKOLOGICZNA S
(2020)
Article
Chemistry, Multidisciplinary
Tomasz Siudyga, Maciej Kapkowski, Piotr Bartczak, Maciej Zubko, Jacek Szade, Katarzyna Balin, Sylvain Antoniotti, Jaroslaw Polanski
Article
Materials Science, Multidisciplinary
A. Levchuk, B. Wilk, G. Vaudel, F. Labbe, B. Arnaud, K. Bann, J. Szade, P. Ruello, V Juve
