Review
Materials Science, Multidisciplinary
Mari Napari, Tahmida N. Huq, Robert L. Z. Hoye, Judith L. MacManus-Driscoll
Summary: Nickel oxide (NiOx) is a key p-type oxide semiconductor with versatile and tunable properties, widely used in electronic devices. The properties of NiO(x) thin films strongly depend on the deposition method and conditions. Efficient implementation of NiO(x) in next-generation devices will require controllable growth and processing methods.
Article
Chemistry, Inorganic & Nuclear
Aida Raauf, Jennifer Leduc, Michael Frank, Daniel Stadler, David Graf, Michael Wilhelm, Matthias Grosch, Sanjay Mathur
Summary: In this study, UO2 thin films were synthesized by CVD using a U(VI) precursor, and it was found that the application of magnetic fields can alter the morphology and crystallographic orientation of grains, reduce grain size, promote polycrystalline growth, and decrease surface oxidation of U(IV) centers. The presence of a magnetic field as an extrinsic parameter in the CVD process has a positive effect on controlling the texture and chemical homogeneity of the grown films.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Diane Samelor, Asiya Turgambaeva, Vladislav Krisyuk, Adeline Miquelot, Jeremy Cure, Sergey Sysoev, Sergey Trubin, Pavel Stabnikov, Jerome Esvan, Vassilios Constandoudis, Constantin Vahlas
Summary: The study investigated the use of two solid precursors for the chemical vapor deposition of TiO2 films, revealing differences in film structure and photocatalytic performance between the two precursors.
Article
Chemistry, Multidisciplinary
Dennis Zywitzki, Raoul Schaper, Engin Ciftyuerek, Jan-Lucas Wree, Dereje H. Taffa, Daniel M. Baier, Detlef Rogalla, Yujiao Li, Michael Meischein, Alfred Ludwig, Zheshen Li, Klaus Schierbaum, Michael Wark, Anjana Devi
Summary: Transition metal ferrites (such as CFO and NFO) have gained attention as potential materials for supercapacitors, with CVD processes offering advantages in producing high-quality, uniform, and dense ferrite films. Electrodes deposited on conducting substrates exhibit pseudocapacitive behavior, with high interfacial capacitances.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Hisashi Yamada, Sho Inotsume, Naoto Kumagai, Toshikazu Yamada, Mitsuaki Shimizu
Summary: Two different boron precursors, diborane and trimethyl boron, were investigated for h-BN growth, with the BN layer grown using TMB containing a higher amount of carbon atoms and exhibiting turbostratic BN structure compared to that grown using B2H6. The Raman peak frequencies and widths indicate that TMB induces a larger compressive strain and prevents the formation of highly crystalline h-BN thin films.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Saba Ghafourisaleh, Georgi Popov, Markku Leskela, Matti Putkonen, Mikko Ritala
Summary: This study successfully deposited PEDOT films using oxidative molecular layer deposition (oMLD) technique with 3,4-ethylenedioxythiophene (EDOT) and rhenium pentachloride (ReCl5). The deposited films were transparent in the visible region and showed relatively high electrical conductivities.
Article
Crystallography
Feifei Lan, Rui Zhou, Ziyue Qian, Yuansha Chen, Liming Xie
Summary: In this study, Fe3O4 thin films with room-temperature ferrimagnetism were successfully grown using a simple chemical vapor deposition method. The films maintained good magnetic properties even at thicknesses as low as 4 nm. Various analysis techniques were used to study the structure and quality of the films, and it was found that the saturation magnetization was higher than that of bulk materials and the Verwey transition was observed. This work provides a new method for synthesizing ultrathin films with ferrimagnetic properties for applications in electronics, spintronics, and memory devices.
Article
Chemistry, Physical
David Zanders, Ji Liu, Jorit Obenlueneschloss, Claudia Bock, Detlef Rogalla, Lukas Mai, Michael Nolan, Sean T. Barry, Anjana Devi
Summary: This work introduces a new approach for the atomic layer deposition (ALD) of metallic Co thin films, utilizing a thermal ALD process with CoCl2(TMEDA) precursor and Zn aminoalkyl compound as reducing agent. The research investigates the precursors' saturation behavior, film growth characteristics, and proposes reaction steps leading to pure Co film formation, confirmed by density functional theory (DFT) calculations. Thorough analysis of the Co thin films obtained from the process reveals the coexistence of carbon species in the film bulk, with promising resistivity values without postgrowth treatment.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Saleh Muhammad, Erik T. Ferenczy, Ian M. Germaine, J. Tyler Wagner, Muhammad T. Jan, Lisa McElwee-White
Summary: In this study, Tetrakis(dithiocarboxylato)molybdenum(iv) complexes were synthesized and characterized as precursors for the aerosol assisted chemical vapor deposition (AACVD) of MoS2 thin films. The thermal behavior of the complexes was suitable for AACVD, and MoS2 thin films were successfully grown using Mo(S2CMe)(4) as a precursor in toluene solution. The films exhibited a 2H-MoS2 structure with vertically oriented morphology and a thickness of 2.54 μm, which was confirmed by various characterization techniques including GIXRD, XPS, EDS, and FE-SEM. The Raman E-2g(1) and A(1g) vibrational modes of crystalline 2H-MoS2 were also observed.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Paolo Giusto, Daniel Cruz, Tobias Heil, Nadezda Tarakina, Maddalena Patrini, Markus Antonietti
Summary: By chemically vapor depositing BCN thin films from a single source precursor, high transparency and refractive index values for reflective mirrors and lenses are achieved. These wide-bandgap semiconductor materials, with positive valence band, demonstrate stability against oxidation making them ideal for protective coatings and charge transport layers in solar cells. The simple and low-hazard method can open up possibilities for BCN thin films in optics and optoelectronics.
Article
Materials Science, Multidisciplinary
Antoine Raison, Nathalie Prud'homme, Wu Wang, Diana Dragoe, Nita Dragoe
Summary: We have successfully synthesized a multi-cationic oxide (MgCoNiCuZn)O through pulsed liquid injection chemical vapor deposition. The synthesis was carried out at temperatures ranging from 400 degrees C to 550 degrees C, using five metal-organic precursors solubilized in dimethoxyethane (DME). The microstructure of the material was analyzed using HRTEM with HAADF, SEM, EDS, XPS, and XRD techniques before and after annealing.
Article
Engineering, Chemical
David Redka, Milan Buttberg, Gerhard Franz
Summary: This article discusses the issue of longitudinal decreasing film thickness and its solution, providing a theoretical model and experimental verification. By predicting the sticking coefficient curve, the actual homogeneous film thickness can be obtained and shown to be in good agreement with the prediction. Additionally, it is found that there is a maximum achievable homogeneous film thickness in the tube, which can be understood as the coating efficiency.
Article
Chemistry, Physical
Sebastian M. J. Beer, Arbresha Muriqi, Patrick Lindner, Manuela Winter, Detlef Rogalla, Michael Nolan, Andreas Ney, Jorg Debus, Anjana Devi
Summary: Europium sulfide (EuS) thin films grown via chemical vapor deposition (CVD) exhibit high quality, stoichiometry, and tunability, with the advantage of avoiding the use of toxic hydrogen sulfide.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
J. Potocnik, M. Popovic, M. Mitric, Z. Rakocevic
Summary: The deposition angle has a significant influence on the porosity, crystallinity, surface roughness, as well as the optical and electrical properties of nickel thin films. Variations in refractive index, extinction coefficient, and resistivity were observed with different deposition angles, which can be correlated with changes in microstructure and porosity of the films.
Article
Materials Science, Coatings & Films
Jorge Sanchez Espinoza, Fatma Trabelsi, Christophe Escape, Ludovic Charpentier, Marc Fivel, Elisabeth Blanquet, Frederic Mercier
Summary: Ti3SiC2-SiC multilayer film coatings were synthesized using the high temperature reactive chemical vapor deposition technique. The coatings exhibited good mechanical integrity and high temperature stability.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dingyue Hu, Junyoung Kim, Hongjun Niu, Luke M. Daniels, Troy D. Manning, Ruiyong Chen, Bowen Liu, Richard Feetham, John B. Claridge, Matthew J. Rosseinsky
Summary: This study introduces a novel PCFC cathode material, BSCFW, with excellent electrochemical and protonic properties conducive to PCFC application, showing superior stability and performance compared to current state-of-the-art cathode materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Chemical
Elinor T. Vokes, Ernie R. Lewis, Andrew L. Johnson, Michael Cotterell
Summary: This study accurately measured the density of dry internally mixed particles and found significant deviations from ideal mixing, with accuracies and precisions of approximately 5% and 1% respectively. The use of RK polynomials to describe volume changes in mixing was effective in explaining non-ideal mixing.
AEROSOL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Bernhard T. Leube, Christopher M. Collins, Luke M. Daniels, Benjamin B. Duff, Yun Dang, Ruiyong Chen, Michael W. Gaultois, Troy D. Manning, Frederic Blanc, Matthew S. Dyer, John B. Claridge, Matthew J. Rosseinsky
Summary: A tetragonal argyrodite material, Li7Zn0.5SiS6, with more than 7 mobile cations has been successfully synthesized through solid state synthesis and exploration of phase diagram. The crystal structure of Li7Zn0.5SiS6 has been determined and it undergoes a transition from ordered structure to disordered structure at high temperature. The material has multiple types of Li sites and the incorporation of Zn2+ affects the Li distribution. This study expands our understanding of structure-property relationships in argyrodite materials.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dingyue Hu, Karl Dawson, Marco Zanella, Troy D. Manning, Luke M. Daniels, Nigel D. Browning, B. Layla Mehdi, Yaobin Xu, Houari Amari, J. Felix Shin, Michael J. Pitcher, Ruiyong Chen, Hongjun Niu, Bowen Liu, Matthew Bilton, Junyoung Kim, John B. Claridge, Matthew J. Rosseinsky
Summary: This study reports an oxygen cathode material, BSCFW-xMg, that exhibits excellent electrocatalytic performance through the addition of an optimized amount of Mg to the self-assembled nanocomposite BSCFW. The Mg2+ ions concentrate at the interface of BSCFW, resulting in stressed and compositionally inhomogeneous regions. This interfacial chemistry provides an additional degree of freedom for performance optimization and promotes the durability of alkaline-earth based fuel cell materials.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Multidisciplinary Sciences
N. C. A. van Fraassen, K. M. Niang, J. D. Parish, A. L. Johnson, A. J. Flewitt
Summary: This study proposes a method to optimize the geometric aspect ratio of metal-oxide CMOS inverters in low-cost and flexible electronic systems. By reducing the width-to-length ratio of metal-oxide p-type TFTs, the inverter efficiency can be increased, the area can be reduced, and static power consumption can be minimized.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Inorganic & Nuclear
Andrew J. Straiton, Claire L. McMullin, Gabriele Kociok-Koehn, Catherine L. Lyall, James D. Parish, Andrew L. Johnson
Summary: Analogous to alkoxide ligands, metal boroxide and boryloxy complexes are a lesser studied type of hard anionic O- ligands. A new series of amine-stabilized Li, Sn(II), and Zn boryloxy complexes with electron-rich tetrahedral boron centers were synthesized and characterized. The complexes were characterized using 1D, 2D, and DOSY NMR, and solid-state structures were determined via single-crystal X-ray diffraction. The amine-stabilized boryloxy ligand showed enhanced x-donor ability due to electron donation from the amine functionality into the p-orbital of the boron atom, as evidenced by computational quantum chemical studies.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Andrew J. Straiton, James D. Parish, Joshua J. Smith, John P. Lowe, Andrew L. Johnson
Summary: A series of zinc phosphate complexes supported by nitrogen donor-base ligands were synthesized and their molecular structures were determined in both solid and solution states. The complexes showed polymeric and bimetallic structures, with some undergoing monomer-dimer equilibrium in solution. 1H DOSY experiments were conducted to measure the diffusion coefficients of the complexes and approximate the thermodynamic parameters of the monomer-dimer equilibria. One complex maintained its monomeric structure in the solid state, while another existed as both bimetallic species and free ligand in solution.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Kerry R. Flanagan, James D. Parish, Gabriele Kociok-Koehn, Andrew L. Johnson, Laszlo Kotai
Summary: The reactivity of the racemic N-heterocyclic stannylene with chalcogenide elements (O-2, S, Se, and Te) was studied. The reaction with molecular oxygen yielded a cyclic tristannoxane complex, while reactions with S, Se, and Te produced cyclo-distannachalcogenide complexes. NMR studies confirmed the formation of symmetric assemblies, and single crystal X-ray diffraction was used to determine the molecular structures of the products.
Article
Materials Science, Multidisciplinary
Thom R. Harris-Lee, Enrico Della Gaspera, Frank Marken, Jie Zhang, Cameron L. Bentley, Andrew L. Johnson
Summary: Aerosol-assisted chemical vapor deposition (AACVD) was used to fabricate highly nanostructured mixed anatase-rutile phase TiO2 using new and bespoke precursors. The precursor syntheses involved two steps and the suitability for AACVD was assessed using thermogravimetric analysis. The resulting TiO2 films showed exceptional OH- oxidation performance and promise for use in photoanodes for water splitting applications.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Physical
Jon A. Newnham, Quinn D. Gibson, T. Wesley. Surta, Alexandra Morscher, Troy D. Manning, Luke M. Daniels, John B. Claridge, Matthew J. Rosseinsky
Summary: Understanding structure-property relationships is crucial for developing new materials with low thermal conductivity. We synthesise two new mixed-anion materials, Bi8CsO8SeX7 (X = Cl and Br), with low thermal conductivities measured at room temperature. These materials possess different structural features, such as bond strength hierarchies, vacancies, and rattling, which significantly inhibit phonon transport. The thermal conductivities along different crystallographic directions are affected differently due to these features, resulting in low thermal conductivities for the Bi8CsO8SeX7 materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Daisy E. Gomersall, Kham M. Niang, James D. Parish, Zhuotong Sun, Andrew L. Johnson, Judith L. MacManus-Driscoll, Andrew J. Flewitt
Summary: This study demonstrates p-type SnO thin film transistors fabricated via atomic layer deposition (ALD) using Sn(II) alkoxide precursor. The optimization of deposition includes using multiple Sn pulses per ALD cycle and an exposure mode to increase residence time. Post-deposition annealing and back-channel passivation using ALD Al2O3 were also employed to improve device performance. The comparison of different precursor delivery modes shows that deposition with multiple Sn pulses and annealing at 250°C achieves high on/off ratio and field effect mobility.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Hong Cai, Ruiyong Chen, Mounib Bahri, Cara J. Hawkins, Manel Sonni, Luke M. Daniels, Jungwoo Lim, Jae A. Evans, Marco Zanella, Leanne A. H. Jones, Troy D. Manning, Tim D. Veal, Laurence J. Hardwick, Matthew S. Dyer, Nigel D. Browning, John B. Claridge, Matthew J. Rosseinsky
Summary: We successfully synthesized a new spinel-like oxyfluoride Li1.25Ni0.625Mn1.125O3F with significant cation disorder. Its crystal structure was confirmed by combined refinement of X-ray and neutron diffraction data. Li1.25Ni0.625Mn1.125O3F showed capacities of 225mAh/g and 285mAh/g at 25 and 40 degrees C, respectively, by intercalation of additional Li+ into the lattice. Compared to previously reported lithium transition metal disordered rocksalt or spinel-like oxyfluorides, Li1.25Ni0.625Mn1.125O3F exhibited significantly improved cycling stability with high structural integrity.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jon A. Newnham, Tianqi Zhao, Quinn D. Gibson, Troy D. Manning, Marco Zanella, Elisabetta Mariani, Luke M. Daniels, Jonathan Alaria, John B. Claridge, Furio Cora, Matthew J. Rosseinsky
Summary: The researchers have designed and implemented an optimal doping strategy to improve the thermoelectric performance of Bi4O4SeCl2 material, and the predicted behavior has been verified in experiments. Careful consideration of dopant sites and charge states allows for effective computational screening of thermoelectric properties in Bi4O4SeCl2 and could be suitable for assessing other candidate materials.
ACS ORGANIC & INORGANIC AU
(2022)
Article
Chemistry, Inorganic & Nuclear
Hannah S. Sullivan, Andrew J. Straiton, Gabriele Kociok-Kohn, Andrew L. Johnson
Summary: A new series of tin(II) complexes were successfully synthesized by using hydroxy functionalized pyridine ligands. Some of these complexes exhibit oligomerization behavior, with dynamic equilibria between dimeric and tetrameric species at different temperatures.
Article
Chemistry, Physical
Robert C. Dickson, Troy D. Manning, Edwin S. Raj, Jonathan C. S. Booth, Matthew J. Rosseinsky, Matthew S. Dyer
Summary: Exploration of chemical composition and structural configuration space is a fundamental problem in crystal structure prediction. This work extends an existing code to explore variable compositions and presents the first method for predicting crystal structures with variable compositions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
