Article
Materials Science, Ceramics
Yuki Ohigashi, Amon Higuchi, Nataly Carolina Rosero-Navarro, Akira Miura, Kiyoharu Tadanaga
Summary: Thin films of Cu3N were successfully obtained by nitridation of CuO precursor films using urea as a nitrogen source. The formation of Cu3N was confirmed at 400 degrees C for 12 hours under nitrogen flow, with FT-IR spectra indicating the reaction between CuO and urea decomposition products.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Beriham Basha, Jolly Jacob, Z. Tanveer, A. Ali, N. Amin, K. Javaid, Salma Ikram, K. Mahmood, Aqrab ul Ahmad, M. S. Al-Buriahi, Z. A. Alrowaili, Hongchao Wang, Yuqing Sun
Summary: This research aims to investigate the relationship between the thermoelectric properties of Copper Nitride (Cu3N) thin films and their growth parameters. Cu3N thin films were synthesized on glass substrates using thermal evaporation technique at different source to substrate distances. Structural, vibrational, and morphological properties were evaluated using XRD, Raman spectroscopy, and SEM. The optimal source to substrate distance of 25 cm was found to yield the highest Seebeck coefficient and electrical conductivity, with fully developed Cu3N phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Optics
Hafiz T. Ali, Z. Tanveer, Muhammad Rizwan Javed, K. Mahmood, N. Amin, Salma Ikram, A. Ali, M. Rehan H. Shah Gilani, M. Arif Sajjad, Mohammad Yusuf
Summary: Thin films of copper nitride (Cu3N) were successfully synthesized using thermal evaporation method. Increasing the time duration of nitrogen flow resulted in improved crystal quality of the Cu3N thin films.
Article
Physics, Condensed Matter
Z. Tanveer, K. Mahmood, S. Ikram, A. Ali, N. Amin
Summary: In this study, the thermoelectric properties of copper nitride thin films were successfully controlled by optimizing the post growth nitrogen gas flow time. Increasing the annealing time duration improved the crystallinity, Seebeck coefficient, and electrical conductivity of the films, resulting in a higher power factor. Analytical techniques such as XRD, Raman spectroscopy, and SEM were used to support the findings.
PHYSICA B-CONDENSED MATTER
(2021)
Review
Materials Science, Multidisciplinary
Yiyong Zhang, Zhibin Zhang, Xin Wang, Wen Yao, Xiubing Liang
Summary: High-entropy amorphous thin films possess excellent properties and have garnered attention from scientific researchers. This article provides a brief overview of the concept, classification, and preparation technologies, as well as a detailed discussion of the research progress and potential application fields.
Article
Chemistry, Physical
Yuhe Liu, Nina Ge, Kunlun Wang, Niannian Li, Hui Sun, Jean-Francois Pierson, Bo Dai, Yong Wang
Summary: This study reports the strong green photoluminescence in metastable Zr3N4 thin films with an orthorhombic structure for the first time. Notable green photoluminescence in the wavelength region of 490-535 nm has been identified in such orthorhombic Zr3N4 thin films even at room temperature. A joint experimental and theoretical study has been performed to investigate its electronic structures and to reveal the origins of such green light emissions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yuhe Liu, Nina Ge, Kunlun Wang, Niannian Li, Hui Sun, Jean-Francois Pierson, Bo Dai, Yong Wang
Summary: This study reports on the strong green photoluminescence observed in Zr3N4 thin films with an orthorhombic structure. The origins of this phenomenon have been investigated through experimental and theoretical studies, revealing the potential to solve the green gap problem in LEDs with low cost.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Ga Yeon Lee, Seungmin Yeo, Chan-Mi Cho, Seung Hoon Oh, Hyeonbin Park, Bo Keun Park, Seung Uk Son, Taeyong Eom, Taek-Mo Chung
Summary: This paper reports the synthesis of three novel titanium complexes containing amidoxime ligands for the fabrication of titanium nitride (TiN) thin films via atomic layer deposition (ALD). The ligands were successfully synthesized and used to produce the complexes, and the liquid complex 5 was used as a precursor for the synthesis of TiN thin films. The deposition of TiN thin films was achieved with self-limiting growth and resulted in smooth and well-oriented microstructure.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Analytical
Niklas Wolff, Md Redwanul Islam, Lutz Kirste, Simon Fichtner, Fabian Lofink, Agne Zukauskaite, Lorenz Kienle
Summary: Research on wurtzite-type aluminum scandium nitride (Al1-xScxN) thin films revealed an anomalous thermal expansion at high temperatures, attributed to the coupling contributions of intrinsic and extrinsic factors. This finding is significant for the manufacturing and operation of Al1-xScxN-based devices.
Article
Materials Science, Multidisciplinary
Md Maidul Islam, Daniel G. Georgiev
Summary: The Cu3N films were deposited through reactive sputtering of copper in a nitrogen/argon gas mixture, with the resulting films exhibiting polycrystalline structure and variable crystalline orientation depending on substrate temperature. The optical band gap values and resistivity of the film material showed significant variations with substrate temperature and nitrogen gas fraction, with different characteristics observed for films deposited on Si and glass substrates.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Ming Wang, Leng Chen
Summary: Explosive crystallization (EC) with random orientation was observed as an initiating effect on crystallization during the early stage of crystallization for Ge-Cu-Te thin films. The thickness and annealing duration can modify the progress of EC. The initial crystallization characteristics of Ge-Cu-Te thin films were investigated experimentally, along with their correlation with electrical behaviors in phase-change random access memory (PCRAM) applications.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Christopher Perez, Aaron J. Mcleod, Michelle E. Chen, Su-In Yi, Sam Vaziri, Ryan Hood, Scott T. Ueda, Xinyu Bao, Mehdi Asheghi, Woosung Park, A. Alec Talin, Suhas Kumar, Eric Pop, Andrew C. Kummel, Kenneth E. Goodson
Summary: Aluminum nitride (AlN) is an electrically insulating material with excellent thermal conductivity. This study demonstrates the deposition of AlN films at low temperatures using sputtering, and analyzes their thermal properties based on grain size and interfacial quality. The results show that varying the partial pressure of reactive N2 can significantly alter the thermal conductivity of the films, and the defect densities can be estimated from the measurements, providing insights for optimizing the thermal engineering of AlN.
Article
Materials Science, Coatings & Films
J. Salamania, A. F. Farhadizadeh, K. M. Calamba Kwick, I. C. Schramm, T. W. Hsu, L. J. S. Johnson, L. Rogstrom, M. Oden
Summary: This study reveals the influence of nitrogen vacancies on the decomposition and mechanical properties of wurtzite TiAlN at high temperatures. It is found that nitrogen-deficient wurtzite TiAlN decomposes into intermediary MAX phases and segregates into pure c-TiN and w-AlN phases after high-temperature annealing, while intermetallic TiAl nanoprecipitates are formed. The semicoherent interfaces between the wurtzite phase and the precipitates cause age hardening, which remains even after annealing at 1200 degrees Celsius.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Physics, Applied
P. John, M. Al Khalfioui, C. Deparis, A. Welk, C. Lichtensteiger, R. Bachelet, G. Saint-Girons, H. Rotella, M. Hugues, M. Grundmann, J. Zuniga-Perez
Summary: Single-crystalline Zn3N2 thin films were successfully grown on MgO and YSZ substrates with different orientations achieved depending on growth conditions. The films exhibited systematic n-type and degenerate behavior with varying carrier concentrations and electron mobilities, leading to optical bandgaps in the range of 1.05-1.37 eV. Hall effect measurements showed that ionized impurity scattering was the main limiting factor for mobility in the films.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Coatings & Films
Tianyuan Huang, Peiyu Ji, Jianjun Huang, Bin Yu, Xuemei Wu
Summary: Tungsten nitride (WNx) films were successfully deposited on silicon substrates with different crystalline phases by adjusting the N-2 flow rate, axial distance, and substrate temperature. The resulting films exhibited varying resistivity and hardness values, demonstrating the impact of deposition parameters on the properties of the films.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sahba Mobini, Maria Ujue Gonzalez, Olga Caballero-Calero, Erin E. Patrick, Marisol Martin-Gonzalez, Jose Miguel Garcia-Martin
Summary: The use of metallic nanostructures in bioelectrode fabrication is gaining attention due to their potential benefits in surface area and electrochemical performance. This study introduces a versatile fabrication method for metallic nanocolumnar structures (NCs) and thin films (TFs) from Ti, Au, and Pt. The results show that NCs significantly reduce impedance and have higher charge storage capacity compared to TFs. Circuit simulations demonstrate that NCs provide less filtered signals in voltage-controlled systems and safer stimulation conditions in current-controlled systems. Additionally, NCs exhibit more stable electrochemical properties compared to TFs, making them promising for in vivo use.
Article
Materials Science, Multidisciplinary
Cristina Manzano, Julia Rodriguez-Acevedo, Olga Caballero-Calero, Marisol Martin-Gonzalez
Summary: The study investigates the influence of different waveforms on the optical and morphological properties of 3D-AAO metamaterials and explains the effect of waveform on colors and hues through a theoretical model. Additionally, the research examines how color can be enhanced by depositing a thin metal layer on top of 3D-AAO and develops a theoretical model for the thickness of the metal layer.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Pablo Diaz-Rodriguez, Miguel Panizo-Laiz, Cesar Gonzalez, Roberto Iglesias, Ignacio Martin-Bragado, Raquel Gonzalez-Arrabal, Jose Manuel Perlado, Ovidio Pena-Rodriguez, Antonio Rivera
Summary: In this paper, an enhanced hydrogen permeation effect along grain boundaries in tungsten is reported. Experimental measurements and simulations support the observation that grain boundaries act as preferential migration pathways for hydrogen atoms, which has significant implications in reducing hydrogen retention in various applications.
EMERGENT MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Maria de Lourdes Gonzalez-Juarez, Carlos Morales, Jan Ingo Flege, Eduardo Flores, Marisol Martin-Gonzalez, Iris Nandhakumar, Darren Bradshaw
Summary: In this work, a switch from n-type to p-type conductivity in electrodeposited Cu-3(HHTP2) is observed, most likely due to oxygen molecular doping. The synthesis of electrically conductive 2D metal-organic frameworks has been achieved through the introduction of highly conjugated organic linkers. However, the porous structure and unsaturated metal sites in MOFs make them susceptible to ambient adsorbates, which can affect their charge transport properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Alejandra Ruiz-Clavijo, Olga Caballero-Calero, David Navas, Amanda A. Ordonez-Cencerrado, Javier Blanco-Portals, Francesca Peiro, Ruy Sanz, Marisol Martin-Gonzalez
Summary: Understanding the collective magnetic behavior of interconnected magnetic nanostructures is crucial for predicting and controlling the advanced functionalities of 3D integrated magnetic nanostructures. This study focuses on interconnected nickel nanowires forming intricate and ordered magnetic systems, and investigates their magnetization reversal processes and anisotropic magnetic responses. Experimental characterization and micromagnetic simulations reveal the complex magnetic interactions that dominate the collective response of the system.
ADVANCED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Physical
Aida Serrano, Olga Caballero-Calero, Cecilia Granados-Miralles, Giulio Gorni, Cristina Manzano, Marta Rull-Bravo, Alberto Moure, Marisol Martin-Gonzalez, Jose F. Fernandez
Summary: This study demonstrates the use of a cold sintering process (CSP) to sinter CoSb3-based thermoelectric materials for the first time. The CSP yields samples with a relative density of 86% at 150℃ with a uniaxial pressure of 750 MPa, which is increased to around 92% after a post-annealing at temperatures ≥ 500℃ in Ar atmosphere. The CSP produces Te doped-CoSb3 nanocomposites with similar morphological and structural characteristics to the starting nanopowders obtained by ball milling in air atmosphere. The sintered thermoelectric nanocomposites exhibit a maximum figure of merit of 0.12(3) at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Marisol Martin-Gonzalez, Olga Caballero-Calero
Summary: This study introduces the thermoelectric generator (TEG), which utilizes the Seebeck effect to convert waste energy into electrical energy. It discusses the basic knowledge, current state, different geometries and associated issues of TEGs, as well as the new technologies and difficulties they bring.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Cristina Manzano, Olga Caballero-Calero, Aida Serrano, Pedro M. Resende, Marisol Martin-Gonzalez
Summary: This study investigated the electropolymerization conditions of PEDOT films to improve their thermoelectric properties, finding the best performance at 1.3 V for 10 minutes. Additionally, 3D PEDOT nanonetworks synthesized inside 3D AAO exhibited lower thermoelectric properties.
Article
Chemistry, Multidisciplinary
Olga Caballero-Calero, Alejandra Ruiz-Clavijo, Cristina Manzano, Marisol Martin-Gonzalez, Gaspar Armelles
Summary: The fabrication of 1D nanowire arrays and 3D nanowire networks of topological insulators and metals using Bi2Te3 and Ni inside AAO templates has been achieved. Despite the different plasmon capabilities of the two materials, the optical response is determined by plasmon resonances, whose position depends on nanowire interactions and material properties. The plasmon resonances of Bi2Te3 nanowires, due to their thermoelectric properties, could be utilized to enhance thermal gradients and associated thermoelectric power.
Article
Engineering, Electrical & Electronic
Andres Conca, Elias Ferreiro-Vila, Alfonso Cebollada, Marisol Martin-Gonzalez
Summary: We investigated the power factor of highly boron-doped nano-crystalline Si thin films with controlled doping concentration. By varying the boron magnetron power while maintaining the power of a SiB source constant during codeposition, we achieved a high degree of tuning of boron content. The results showed that with increased boron doping, the electrical conductivity increased while the Seebeck coefficient decreased.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alejandra Ruiz-Clavijo, Nicolas Perez, Olga Caballero-Calero, Javier Blanco, Francesca Peiro, Sergi Plana-Ruiz, Miguel Lopez-Haro, Kornelius Nielsch, Marisol Martin-Gonzalez
Summary: The resistance of an ordered 3D-Bi2Te3 nanowire nanonetwork was studied, and it was found that the increase in resistance at low temperatures can be explained by the Anderson model for localization. Angle-dependent magnetoresistance measurements revealed a distinctive weak antilocalization characteristic with a double feature associated with transport along two perpendicular directions dictated by the spatial arrangement of the nanowires. The observed localization effects may explain the enhancement of the Seebeck coefficient in the 3D-Bi2Te3 nanowire nanonetwork compared to individual nanowires.
Article
Nuclear Science & Technology
J. Broetzner, C. Cupak, M. Fellinger, H. Biber, A. Lopez-Cazalilla, F. Granberg, F. Kporha, A. Mutzke, R. Gonzalez-Arrabal, F. Aumayr
Summary: This study investigates the sputtering properties of nano-columnar tungsten surfaces under 2 keV D-2(+) irradiation. The results of experiments and numerical simulations show that the geometrically induced sputtering yield reduction is still observed despite the increased range of ions in the material.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Materials Science, Multidisciplinary
R. Gonzalez-Arrabal, E. Carella, F. J. Sanchez, G. de la Cuerda-Velazquez, G. Garcia, J. M. Perlado, T. Hernandez
Summary: In this study, the Li content and distribution in Al2O3 coatings were characterized using secondary ions mass spectroscopy and a combination of ion beam analysis techniques. The study investigated the influence of lithium diffusion on the coating performance under neutron irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Liliana Vera-Londono, Alejandra Ruiz-Clavijo, Jaime Andres Perez-Taborda, Marisol Martin-Gonzalez
Summary: This study utilized the cross-point calibration method combined with scanning thermal microscopy (SThM) to accurately characterize thermal properties at the nanoscale. The experimental results provided quantitative values for thermal contact resistance and thermal exchange radius, which were used to calculate the thermal conductivity of different materials. The high-resolution thermal images obtained from the V-1 omega and V-3 omega signals offered valuable insights into the heat dissipation of the tested materials.
NANOSCALE ADVANCES
(2022)
Article
Materials Science, Multidisciplinary
Pedro M. Resende, Marisol Martin-Gonzalez
Summary: This study reports the fabrication of polymeric distributed Bragg reflectors (DBRs) by infiltrating polylactic acid into 3D anodic aluminium oxide templates. The obtained structures exhibit high reflectance and offer a new approach for flexible all-polymer photonic systems.
MATERIALS ADVANCES
(2022)
