Article
Physics, Condensed Matter
Ji-Hoon Kang, Jihyun Kim, Tae Beom Park, Woo Seok Choi, Sungmin Park, Tuson Park
Summary: We report the growth of CeIrIn5 thin films with different crystal orientations on a MgF2 (001) substrate using the pulsed laser deposition technique. The characteristic features of heavy-fermion superconductors, including Kondo coherence and superconductivity, were observed in the thin films. The successful synthesis of CeIrIn5 thin films is expected to provide a new avenue for exploring novel quantum phases.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Zhong Mo, Ruqi Chen, Lirong Liang
Summary: Epitaxial (001)-, (118)-, and (104)-oriented BErT films were obtained using pulsed-laser-ablated method, and their up-conversion luminescence intensity was found to be orientation-dependent due to the reflection of aligned grains towards incident light.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
T. Roch, M. Gregor, S. Volkov, M. Caplovicova, L. Satrapinskyy, A. Plecenik
Summary: This study examined the impact of different substrates on the structure and orientation of niobium nitride thin films, revealing that films on C-Al2O3 substrate exhibited the best superconducting properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Alireza Ramezani, Hossein Abdizadeh, Mohammad Reza Golobostanfard
Summary: BaTiO3 and SrTiO3 thin films and BaTiO3/SrTiO3 lamellar composites were successfully synthesized using the sol-gel spin-coating method in this study. The morphology and band gap of the composite samples could be altered by changing the periodicity of the samples. The optical properties of the multi-stacked composites, including dielectric constant, dielectric loss, impedance, Urbach tail, extinction coefficient, and electric modulus, were also investigated.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. A. Khan, L. Braic, Y. AlSalik, H. Idriss
Summary: Monolithic integration of metal oxide thin films with conventional semiconductors such as silicon and germanium allows for new functionalities in semiconductor devices. Using pulsed laser deposition (PLD), epitaxial strontium titanate (STO) films were grown on Ge (001) single crystal, achieving a sharp interface without interfacial amorphous oxide layer by optimizing surface preparation and deposition conditions. Factors such as Ge(001) surface substrate cleaning, growth temperature, oxygen partial pressure, and laser energy density are discussed for their effects on STO film growth, with the presence of O-2 leading to growth on (100) and (110) planes.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Ju-Guang Hu, Tong Wu, Muhammad Ishaq, Umar Farooq, Shuo Chen, Zhuang-Hao Zheng, Zheng-Hua Su, Xiao-Dong Lin, Ping Fan, Hong-Li Ma, Xiang-Hua Zhang, Guang-Xing Liang
Summary: The CZTS thin-film solar cell achieved a record power conversion efficiency of 6.62% through pulsed laser deposition and sulfurization process, attributed to its optimized structure and composition. This research provides a facile and robust preparation method for CZTS films with enhanced photovoltaic properties and increased efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Ceramics
Hidetoshi Miyazaki, Yosuke Yamashita, Takeshi Tsuji, Wenchang Yeh, Shinya Tsukada
Summary: SiO2-coated BaTiO3 (BT) powder was used to prepare BT films on Au/stainless steel substrates by pulsed electrophoretic deposition. The BT films were sintered with a semiconductor laser and showed improved dielectric and ferroelectric properties. Laser irradiation promoted the sintering of the BT film and reduced its thickness, resulting in increased remanent polarization and coercive field.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
A. B. El Basaty, M. M. Ahmed, W. Abbas, Ahmed I. Ali
Summary: The pulsed laser deposition (PLD) technique is used to fabricate Si-SnZnO3 thin films on MgO substrate, as well as on STO buffer layer. The influence of the STO buffer layer on the ferroelectric behavior of Si-SnZnO3 films is investigated. The structure, morphology, film thickness, resistivity, carrier mobility, and ferroelectricity parameters of the Si-SnZnO3 films are studied.
Article
Chemistry, Physical
Stefan Andrei Irimiciuc, Sergii Chertopalov, Maksym Buryi, Zdenek Remes, Martin Vondracek, Ladislav Fekete, Michal Novotny, Jan Lancok
Summary: CuI thin films were deposited with controlled morphology, structure, and defect nature in different Ar atmospheres. Band gap tailoring was achieved by controlling the plasma ion kinetic energy. Variation in Ar pressure allowed control over the nature of vacancies. Addition of Ar resulted in preferential scattering and energy losses of Cu ions in the plasma.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Jiqiang Jia, Chen Liu, Mengjiao Guo, Li Lei
Summary: This study reports the epitaxial growth process of negative-type high-temperature superconducting thin film Nd1.85Ce0.15CuO4 (NCCO) by pulsed laser deposition. The results show that a good superconducting phase can be prepared from NCCO films only when the heat treatment temperature is higher than 650°C. The optimal oxygen pressure and deoxidization temperature for phase formation and the superconductivity of NCCO films are also determined.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
Jing Shi, Rizhuang Dong, Jiayi He, Daowei Wu, Wenchao Tian, Xiao Liu
Summary: This study investigated the structural, dielectric, and ferroelectric properties of lead-free ceramics based on the ternary system of BaTiO3 (BT). It was observed that the dopant concentration influenced the structural evolution from tetragonal to pseudocubic phase. The dielectric response showed diffusive peaks and relaxor behavior, indicating a transition from ferroelectric to relaxor state. The ceramics exhibited slim polarization hysteresis loops and electrical inhomogeneities caused by excessive dopant addition, leading to degraded electric breakdown strength. The oxygen vacancy hopping mechanism was proposed to explain the diffuse dielectric response at high dopant concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Prashant Bisht, Arvind Kumar, Abhishek Ghosh, Per Erik Vullum, Martin Fleissner Sunding, Branson D. Belle, Bodh Raj Mehta
Summary: In this study, WS2 thin films with controllable growth orientation were synthesized using pulsed laser deposition. The effect of growth parameters on the formation and properties of the films was investigated. The study found significant differences in the growth mechanisms, gas sensing parameters, and underlying mechanisms between vertically and horizontally grown films.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Yoonho Ahn, Jong Yeog Son
Summary: The study investigated the deposition-rate-dependent ferroelectric properties of BaTiO3 thin films fabricated through pulsed laser deposition, revealing an enhancement in ferroelectric properties with increased tetragonality. It was also found that the deposition rate affects the leakage current and bandgap energy of the films.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Engineering, Electrical & Electronic
Sasmita Behera, Alika Khare
Summary: The present study investigates the impact of substrate temperature and oxygen pressure on the linear and nonlinear optical properties of pulsed laser deposited BTO thin films. The optimal background pressure and substrate temperature are identified, and the thin films exhibit a pseudocubic phase. Nonlinear optical properties are studied using a Z-scan set-up and show a strong response at the optimum deposition parameters.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Crystallography
Venkata Sreenivas Puli, Dhiren Kumar Pradhan, Gollapudi Sreenivasulu, Simhachalam Narendra Babu, Nandiraju Venkata Prasad, Kalpana Madgula, Douglas B. Chrisey, Ram S. Katiyar
Summary: The development of lead-free BaTiO3/NiFe2O4/BaTiO3 (BTO/NFO/BTO) trilayer structure thin films is significant for eco-friendly and implantable microelectromechanical systems (MEMS)-based devices. The deposited trilayer films show interesting properties such as high room temperature dielectric constant, magnetoelectric behavior, and a reasonably high saturation magnetization at room temperature. The tri-layered films exhibit interesting magnetoelectric coupling coefficient at room temperature.
Article
Nanoscience & Nanotechnology
Ryan Bower, Daniel A. L. Loch, Ecaterina Ware, Andrey Berenov, Bin Zou, Papken Eh Hovsepian, Arutiun P. Ehiasarian, Peter K. Petrov
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Engineering, Chemical
Guangru Zhang, Dragos Neagu, Peter J. King, Sami Ramadan, Anthony O'Neill, Ian S. Metcalfe
Summary: Perovskite oxides with mixed ionic and electronic conductivity are of interest for oxygen separation membranes, but they often degrade due to segregation and reaction with sulfur-based species in natural gas. Coating these membranes with Alumina layers by atomic layer deposition can delay or prevent degradation, with a critical coating thickness of around 30 nm showing no negative effect on O-2 transport flux and good flux recovery after H2S removal. Thinner coatings provide little protection against poisoning, while thicker coatings significantly decrease O-2 permeation fluxes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Sami Ramadan, Richard Lobo, Yuanzhou Zhang, Lizhou Xu, Olena Shaforost, Deana Kwong Hong Tsang, Jingyu Feng, Tianyi Yin, Mo Qiao, Anvesh Rajeshirke, Long R. Jiao, Peter K. Petrov, Iain E. Dunlop, Maria-Magdalena Titirici, Norbert Klein
Summary: Graphene field-effect transistors (GFETs) are ideal building blocks for high-performance electrical biosensors due to the strong response to charged biomolecules. By decorating the graphene sensor area with carbon dots (CDs), the detection limit of GFET biosensors can be significantly improved, resulting in higher sensitivity, faster response, and three orders of magnitude improvements in LoD.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Sami Ramadan, Yuanzhou Zhang, Deana Kwong Hong Tsang, Olena Shaforost, Lizhou Xu, Ryan Bower, Iain E. Dunlop, Peter K. Petrov, Norbert Klein
Summary: The performance of graphene devices can be limited by defects and impurities introduced during fabrication, but using HMDS as a buffer layer during device fabrication can significantly reduce damage, improve graphene quality, and enhance device performance.
Article
Nanoscience & Nanotechnology
A. Berenov, P. Petrov, B. Moffat, J. Phair, L. Allers, R. W. Whatmore
Summary: This study investigated the properties of Nb-doped lead zirconate titanate films and found that Nb doping affects the orientation and ferroelectric response of the films, while also increasing the internal field and pyroelectric coefficient. Nb-doped films showed an increase in photocurrent, exhibiting a complex relationship between photovoltaic and pyroelectric effects.
Article
Materials Science, Multidisciplinary
Andrey Altynnikov, Roman Platonov, Andrey Tumarkin, Peter K. Petrov, Andrey Kozyrev
Summary: The proposed method utilizes an electrically tunable ferroelectric lens to transform an incident plane wave into a helical one, forming electromagnetic waves with a tunable nonzero orbital angular momentum (OAM). It uses high-resistive thin/thick film electrodes and describes the correlation between film electrodes topology and the highest order of OAM modes that the lens can form.
Article
Physics, Applied
Daan M. Arroo, Neil McN. Alford, Jonathan D. Breeze
Summary: The article introduces the latest room-temperature solid-state masers, summarizes the development process from previous cryogenic solid-state masers to room-temperature solid-state masers, and discusses the operational characteristics of these masers as microwave sources and amplifiers, as well as their potential applications in cavity quantum electrodynamics.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Ryan Bower, Matthew P. Wells, Freya Johnson, Rebecca Kilmurray, Brock Doiron, Eleonora Cali, Giuseppe Mallia, Bin Zou, Andrei P. Mihai, Nicholas M. Harrison, Sarah Fearn, Rupert Oulton, Neil McN. Alford, Lesley F. Cohen, Peter K. Petrov
Summary: This study investigates the optical response and electrical properties of reactively sputtered niobium oxynitride thin films through experimental and computational simulations. The experimental results show that these films have screened plasma wavelengths tunable over a range of 90 nm, and exhibit a double epsilon-near-zero behavior. This behavior is attributed to the incorporation of oxygen into the films during deposition.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Lizhou Xu, Sami Ramadan, Oluwatomi E. Akingbade, Yuanzhou Zhang, Sarah Alodan, Neil Graham, Karl A. Zimmerman, Elias Torres, Amanda Heslegrave, Peter K. Petrov, Henrik Zetterberg, David J. Sharp, Norbert Klein, Bing Li
Summary: The study presents an innovative GFET biosensing method for sensitive and rapid detection of GFAP in patient plasma, holding great promise for diagnostic applications.
Article
Materials Science, Multidisciplinary
Ryan Bower, Cillian P. T. Mcpolin, Alexey V. Krasavin, Anatoly V. Zayats, Peter K. Petrov
Summary: The stability and optical properties of titanium nitride and gold, two refractory plasmonic materials, were analyzed under different temperature conditions. Titanium nitride showed better morphological stability, but both materials experienced deteriorated optical properties starting from 200 degrees C.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Apanpreet Kaur, Daniel Darvill, Shuning Xiang, Jerry Y. Y. Heng, Peter K. Petrov, Robert L. Z. Hoye, Rongjun Chen
Summary: The World Health Organization emphasizes the importance of global deployment of new vaccines to combat disease outbreaks. RNA-based vaccines utilizing lipid nanoparticles (LNPs) as a drug delivery system have been highly effective during the COVID-19 pandemic. However, LNPs are unstable at room temperature and agglomerate during storage, rendering them ineffective for intracellular delivery. This study demonstrates the suitability of nanopackaging using nanohole arrays as patterned surfaces for the separation and storage of functionalized LNPs.
Article
Crystallography
Yuxuan Wang, Bin Zou, Bruno Rente, Neil Alford, Peter K. Petrov
Summary: In this study, multilayer graphene thin films (MLG) were grown without a catalyst on Si/SiO2 using pulsed laser deposition (PLD). It was found that 500 laser pulses were required to produce fully covered samples, which contained approximately 5 layers of graphene. The number of layers was not affected by the laser fluence and the sample cooling rate, but increasing the laser fluence resulted in a reduction in MLG resistance. PLD method is suitable for producing nanocrystalline MLG with similar electrical conductivity as commercial CVD graphene.
Article
Nanoscience & Nanotechnology
Qiaomu Yao, Andrey V. V. Berenov, Ryan Bower, Bin Zou, Xiaofei Xiao, Neil M. M. Alford, Rupert F. M. Oulton, Peter K. K. Petrov
Summary: Gold nanoparticle (AuNP) decoration is a commonly used method to enhance optical responses. This study found that the growth mechanisms of AuNPs vary depending on the substrate, which has a significant impact on the sample's properties.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yuxuan Wang, Anais Guerenneur, Sami Ramadan, Jingle Huang, Sarah Fearn, Nomaan Nabi, Norbert Klein, Neil McN. Alford, Peter K. Petrov
Summary: Due to its unique properties, such as high electrical conductivity, low density, and flexibility, graphene has great potential for various applications. However, depositing dielectric materials on graphene at high temperatures and in ambient oxygen is challenging due to significant degradation. In this study, the degradation of graphene at elevated temperatures in an oxygen atmosphere was investigated, and a protective method using self-assembled monolayers of hexamethyldisilazane (HMDS) was proposed to enable the growth of oxide thin films on graphene at higher temperatures.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
