Article
Chemistry, Physical
Hama Nadhom, Robert Boyd, Polla Rouf, Daniel Lundin, Henrik Pedersen
Summary: The newly developed CVD method allows for area selective deposition based on the electrical resistivity of the substrate surface, simplifying the fabrication of nanoscaled electronics. By adding a thin layer of silver on the SiO2 surface, iron films can be selectively deposited in low-resistivity areas, demonstrating the potential for using electric resistivity of the substrate surface in metal-on-metal deposition.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yingfeng He, Zhengying Si, Yu 'ang Shi, Huiyun Wei, Mingzeng Peng, Xinhe Zheng
Summary: Gallium nitride (GaN) thin films were grown on stainless steel substrate with Al2O3 buffer using plasma-enhanced atomic layer deposition at low temperature (& LE;290 & DEG;C). The GaN films exhibited a polycrystalline structure with a strong (002) preferential orientation. The refractive index of the films was determined as 2.30 at 633 nm using Spectroscopic Ellipsometry. This study provides a new approach for achieving high-quality GaN on metal substrates, which is promising for future applications of GaN-based devices on metal substrates.
Article
Engineering, Electrical & Electronic
Alexander C. Benken, Yogesh B. Gianchandani
Summary: A high yield fabrication process is reported for pressure sensors, based on sapphire substrates and plasma-deposited thin films, providing extraordinarily high output swing relative to baseline and parasitic capacitance. The use of massively parallel diaphragm arrays enables superior full-scale range and resolution in a small footprint. Five types of sensor chips with different diaphragm configurations and corresponding pressure ranges and resolutions are described, along with the design features and experimental results.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Ashley R. R. Bielinski, Ethan P. P. Kamphaus, Lei Cheng, Alex B. F. Martinson
Summary: In this study, in situ pyroelectric calorimetry and spectroscopic ellipsometry were used to investigate the surface reactions in atomic layer deposition of zirconium oxide. The results revealed that the reaction heat is dependent on factors such as growth rate, equilibrium surface hydroxylation, and extent of the reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xiao-Ying Zhang, Duan-Chen Peng, Jing Han, Fang-Bin Ren, Shi-Cong Jiang, Ming-Chun Tseng, Yu-Jiao Ruan, Juan Zuo, Wan-Yu Wu, Dong-Sing Wuu, Chien-Jung Huang, Shui-Yang Lien, Wen-Zhang Zhu
Summary: Aluminum nitride (AlN) thin films with considerable properties were prepared using remote plasma atomic layer deposition (RP-ALD). The properties of AlN films with different growth temperatures were studied, and the characteristics of AlN/GaN and AlN/Al2O3 interfaces were analyzed on sapphire substrates. The experimental results showed that crystal AlN films with a hexagonal wurtzite structure were obtained at 250 degrees C. X-ray photoelectron spectroscopy confirmed the presence of Al-O, Al-O-N complexes, and Al-Al metallic aluminum bonds in the AlN films. High-resolution transmission electron microscopy revealed sharp interfaces of AlN/Al2O3 and AlN/GaN. Photoluminescence measurements confirmed that the AlN buffer layer enhances the quality of GaN grown on sapphire substrates. The high-quality AlN/GaN layers prepared by RP-ALD provide a promising pathway for high-quality GaN-based devices.
SURFACES AND INTERFACES
(2023)
Article
Multidisciplinary Sciences
Jie Fu, Zeyu Fan, Mamiko Nakabayashi, Huanxin Ju, Nadiia Pastukhova, Yequan Xiao, Chao Feng, Naoya Shibata, Kazunari Domen, Yanbo Li
Summary: Interface engineering is an effective strategy to improve the efficiency of thin film semiconductor based solar energy conversion devices. In this study, n-type In:GaN and p-type Mg:GaN were employed to modify the bottom and top interfaces of Ta3N5 thin film photoanode, resulting in significant enhancements in efficiency.
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Elina Kylmaoja, Faleh Abushahba, Jani Holopainen, Mikko Ritala, Juha Tuukkanen
Summary: Coating bone implants with hydroxyapatite (HA) has benefits for osseointegration, but there may be differences in monocyte differentiation and material resorption compared to natural bone. In this study, ALD-HA coating on a titanium substrate was compared with bovine bone, and it was found that ALD-HA led to the presence of non-resorbing cells instead of resorbing osteoclasts. The topographical properties of ALD-HA, such as surface roughness, may play a role in this cellular reaction.
Article
Materials Science, Coatings & Films
Arun Haridas Choolakkal, Hans Hogberg, Jens Birch, Henrik Pedersen
Summary: We demonstrate the conformal chemical vapor deposition of boron carbide thin films using triethylboron as a single source precursor on silicon substrates with 8:1 aspect-ratio morphologies. The films deposited at temperatures below 450°C exhibit excellent step coverage, attributed to the low reaction probability at lower temperatures. The boron carbide films are determined to have B-B, B-C, C-B, and C-C chemical bonds and show a boron-rich composition of approximately B5C.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Materials Science, Coatings & Films
Hanjorg Wagner, Valentin Ripka, Andrea Dellith, Jan Dellith, Florian Wittkaemper, Uwe Hubner, Mario Ziegler
Summary: This paper reports the testing of high performance plasmonic broadband absorbing black coatings fabricated by metastable atomic layer deposition (MS-ALD) for space applications. Humidity testing, thermal cycling, exposure to atomic oxygen, and adhesion testing were used as testing methods. The results show that the films with thickness greater than 9 μm are able to withstand the humidity tests, thermal cycling, and exposure to atomic oxygen without significant loss of their broadband absorption. However, the adhesion of the films has not yet been sufficient to meet the requirements posed by the space environment. Therefore, the authors propose to investigate the coating of the MS-ALD films with high refractive index coatings.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Electrochemistry
Ivan Spajic, Ehsan Rahimi, Maria Lekka, Ruben Offoiach, Lorenzo Fedrizzi, Ingrid Milosev
Summary: Thin films of alumina and hafnia prepared by atomic layer deposition show excellent barrier properties for biomedical applications, with protection mainly dependent on film thickness and substrate type, rather than configuration. Further investigation is warranted for these single and multilayer thin films.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Li -Ting Tseng, Prajith Karadan, Dimitrios Kazazis, Procopios C. Constantinou, Taylor J. Z. Stock, Neil J. Curson, Steven R. Schofield, Matthias Muntwiler, Gabriel Aeppli, Yasin Ekinci
Summary: We demonstrate the feasibility of extreme ultraviolet (EUV) patterning on an HF-treated silicon (100) surface without a photoresist. This is significant because EUV lithography, the leading technique in semiconductor manufacturing, faces limitations in resolution caused by the resists used. Our research shows that EUV photons can induce surface reactions on a hydrogen-terminated silicon surface and assist the growth of an oxide layer as an etch mask. We achieve silicon dioxide/silicon gratings with a half-pitch of 75 nanometers and a height of 31 nanometers, proving the effectiveness of resistless EUV lithography.
Review
Biochemistry & Molecular Biology
Matthew Sullivan, Peng Tang, Xiangbo Meng
Summary: This review examines the surface coatings via ALD and MLD and comparatively analyzes their effects on improving the safety and stability of alkali metal anodes.
Article
Chemistry, Multidisciplinary
Walker J. Tuff, Robert A. Hughes, Brendan D. Nieukirk, Luca Ciambriello, Robert D. Neal, Spencer D. Golze, Luca Gavioli, Svetlana Neretina
Summary: Sacrificial templates are used to control nanoscale reaction products through atomic layer deposition (ALD), where metal nanostructures are used as templates to form complex oxide nanoshells, open-topped nanobowls, vertically standing half-shells, and nanorings. The functionality of these structures is enhanced through the use of directional ion beams.
Article
Engineering, Electrical & Electronic
Nickolas Anderson, Soumya Saha, Gregory Jursich, Christos G. Takoudis
Summary: By utilizing different copper substrate materials and further optimizing the substrate treatment, the selectivity of zirconium oxide deposition can be significantly enhanced; the selectivity of ALD is mainly determined by the balance of the total amounts of oxygen and carbon in the reactor, as well as the ALD conditions and reactor design.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Anatomy & Morphology
Shikhgasan Ramazanov, Dinara Sobola, Stefan Talu, Farid Orudzev, Ali Arman, Pavel Kaspar, Rashid Dallaev, Guseyn Ramazanov
Summary: Thin films of bismuth and iron oxides were successfully deposited on a flexible Kapton substrate using ALD technique, exhibiting uniform distribution of elements, electrical polarization, and ferromagnetic response. The functionalization of Kapton surface with bismuth and iron oxides allows for the adaptation of Bi-Fe-O system to flexible electronics.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Polymer Science
Farid Orudzhev, Dinara Sobola, Shikhgasan Ramazanov, Klara Castkova, Nikola Papez, Daud A. Selimov, Magomed Abdurakhmanov, Abdulatip Shuaibov, Alina Rabadanova, Rashid Gulakhmedov, Vladimir Holcman
Summary: The synthesis of hybrid polymer-inorganic nanocomposite fiber membranes based on PVDF and BFO can effectively solve the problem of decomposing organic dyes with high efficiency by combining the advantages of photoactive piezoelectric nanomaterials and ferroelectric polymers, collecting mechanical vibrations and light energy.
Article
Chemistry, Multidisciplinary
Shikhgasan Ramazanov, Dinara Sobola, Gaji Gajiev, Farid Orudzhev, Pavel Kaspar, Adil Gummetov
Summary: This paper investigates the formation of a bismuth ferrite (BFO) film on a polymeric flexible polyimide substrate using low temperature atomic layer deposition (ALD) at 250 degrees C. Two samples of BFO/Polyimide with different thicknesses (42 nm, 77 nm) were examined. Increasing film thickness led to the formation of a crystalline BFO phase with magnetic and electrical properties characteristic of a multiferroic material. The competition between the magnetic and electrical subsystems resulted in an anomalous magnetization behavior at a temperature of 200 K, possibly related to the multiferroic/polymer interface. This paper explores the potential of low-temperature growth of BFO films on organic materials as structural components for flexible and quantum electronics.
Article
Chemistry, Physical
Kalyan Ghosh, Christian Iffelsberger, Martin Konecny, Jan Vyskocil, Jan Michalicka, Martin Pumera
Summary: This study demonstrates the use of a triboelectric nanogenerator (TENG) for the production of green hydrogen from renewable mechanical energy. A magnetic covalent organic framework composite is used as the positive triboelectric material, while MXene incorporated polydimethylsiloxane (PDMS) film serves as the negative triboelectric material in a contact-separation mode TENG (CS-TENG). Micropatterns are incorporated on the surface of PDMS/MXene film using 3D printing technology. The CS-TENG harvests energy from simple mechanical actions and the harvested electrical energy is used for water electrolysis, producing hydrogen and oxygen. This research is expected to enable the production of green hydrogen from mechanical energy sources such as raindrops, wind, and vehicle movements.
ADVANCED ENERGY MATERIALS
(2023)
Article
Agriculture, Multidisciplinary
Lukman Ahamad, Azmat A. L. Khan, Masudulla Khan, Orudzhev Farid, Mahboob Alam
Summary: This study evaluates the fungicidal potential of green-synthesized magnesium oxide nanoparticles (MgO NPs) from lemon fruit extracts against Alternaria dauci infection on carrots. The MgO NPs exhibit antifungal activity and enhance growth and defense mechanisms in carrots.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2023)
Article
Chemistry, Physical
Farid Orudzhev, Nariman Alikhanov, Abdulkarim Amirov, Alina Rabadanova, Daud Selimov, Abdulatip Shuaibov, Rashid Gulakhmedov, Magomed Abdurakhmanov, Asiyat Magomedova, Shikhgasan Ramazanov, Dinara Sobola, Kamal Giraev, Akhmed Amirov, Kamil Rabadanov, Sultanakhmed Gadzhimagomedov, Rabadanov Murtazali, Valeria Rodionova
Summary: The creation of multi-stimuli-sensitive composite polymer-inorganic materials is important for solving environmental and energy problems. In this study, a hybrid polymer-inorganic nanocomposite porous membrane based on PVDF and BiFeO3/BFO was synthesized and characterized. The addition of BFO increased the proportion of the polar phase and the sample exhibited laser-induced fluorescence depending on the presence of nanoparticles. Furthermore, piezo-photocatalytic experiments showed an increased reaction rate under the combined actions of ultrasonic treatment and UV-visible light irradiation.
Article
Materials Science, Multidisciplinary
Alexandr Knapek, Mohammad M. Allaham, Daniel Burda, Dinara Sobola, Michal Drozd, Miroslav Horacek
Summary: In this paper, a new theory is introduced to explain the effects of polymer-coated cathodes based on an experiment. The experimental data collected from measuring the total emission current from an electrochemically etched polymer graphite rod support the proposed theory. The study presents a physical model with an equivalent circuit to describe the behavior of the polymer-coated cathodes.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Suleiman Kallaev, Sadyk Sadykov, Anatoly Pavlenko, Mansur Ataev, Jiri Majzner, Farid Orudzhev, Kamal Giraev, Nariman Alikhanov
Summary: In this study, nanocomposite films of BiFeO3-Bi2Fe4O9 were fabricated using the method of gas discharge high-frequency cathodic sputtering. The films were analyzed using various techniques, and the ratio of BiFeO3 to Bi2Fe4O9 phases, as well as the size of the crystallites, were determined. It was found that the films exhibited ferromagnetic behavior, with a band gap width of 1.9 eV for indirect transitions and 2.6 eV for direct transitions.
Article
Polymer Science
F. F. Orudzhev, D. S. Sobola, Sh. M. Ramazanov, K. Castkova, D. A. Selimov, A. A. Rabadanova, A. O. Shuaibov, R. R. Gulakhmedov, M. G. Abdurakhmanov, K. M. Giraev
Summary: Polyvinylidene fluoride (PVDF) fibers doped with hydrated calcium nitrate were prepared using electrospinning. Various analysis techniques confirmed the presence of chemical hydrogen bonding between the polymer and the dopant. The addition of the salt reduced the energy of PVDF exciton and exhibited high photocatalytic activity in the degradation of methylene blue under both UV and visible light.
Review
Cell Biology
Veronika Sromova, Dinara Sobola, Pavel Kaspar
Summary: This article primarily introduces the macroscopic and microscopic characteristics of bone tissue, as well as current knowledge of its physiology. It emphasizes the importance of maintaining the balance between bone formation and bone resorption for physical structure and overall health.
Article
Polymer Science
Mohammed A. Al-Anber, Malak Al Ja'afreh, Idrees F. Al-Momani, Ahmed K. Hijazi, Dinara Sobola, Suresh Sagadevan, Salsabeel Al Bayaydah
Summary: In this study, silver (I) ions were successfully loaded onto L-cysteine-functionalized silica, forming a homogeneous monolayer. The adsorption process was found to be chemisorption-controlled, involving chemical bonding between silver ions and the silica surface. This study is important for understanding the saturation of silver ions on silica surfaces and the underlying association mechanisms.
Article
Chemistry, Physical
Shikhgasan Ramazanov, Farid Orudzhev, Gaji Gajiev, Vladimir Holcman, Robert Saraiva Matos, Henrique Duarte da Fonseca Filho, Stefan Talu, Daud Selimov
Summary: A heterostructure BiFeO3/TiO2(Nt)Ti (BFOT) with p-type conductivity in the BFO film and n-type conductivity in the nanotubes was obtained by the atomic layer deposition method. The redistribution of Fe/Ti atoms and the formation of Aurivillius intermediate layered phase and local charge capture centers were observed after thermal treatment. The ferroelectric switching and the transition of the memristive structure were affected by the lateral displacement of the sample and the properties of the periodic signal. The compensation of static charge during resistive switching and the acceleration of structure restructuring with increasing voltage were found to influence the transport properties of the material. The correlation between surface static charge and piezopotential was shown through the analysis of piezoresponse force microscopy, electrostatic force microscopy, and fractal/multifractal dynamics. This new methodology can contribute to the understanding of the resistive switching processes in ferroelectric/semiconductor memristive structures.
APPLIED SURFACE SCIENCE
(2024)
