Article
Materials Science, Ceramics
Zhichao Song, Jun Zhang, Yan Wang, Jianping Li
Summary: SnO2 nanomaterials and SnO2/Li2SnO3 composite nanomaterials doped with different Li contents were synthesized via a one-step thermal evaporation method. The increase of Li doping resulted in changes in the structure and properties, as observed in X-ray diffraction, Raman scattering, and X-ray photoelectron spectroscopy.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Niranjan Kumar, Alexey T. Kozakov, Aleksey Nezhdanov, Sergey A. Garakhin, Vladimir N. Polkovnikov, Nikolay Chkhalo, Aleksandr Mashin, Anatolay Nikolskii, Anton A. Scrjabin
Summary: The study investigated the phonon and plasmon excitations as well as electronic properties of interfaces in periodic W/Si and Si/W multilayer structures. It was found that the plasmon energy in the Si layer blueshifts with decreasing thickness, and the atomic structure and elemental composition at the W/Si interface are modified accordingly with changes in Si layer thickness.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Condensed Matter
Minna Theres James, Shoubhik Mandal, Nirmal K. Sebastian, Pramita Mishra, R. Ganesan, P. S. Anil Kumar
Summary: This study reports the temperature-dependent structural characterization of type-II Dirac semimetal NiTe2 using bulk single crystal and 200 nm thick nanoflakes. X-ray diffraction and Rietveld refinement analysis confirm excellent crystallinity and linear thermal expansion coefficient along different lattice directions. Raman spectra analysis shows non-linear variations in phonon frequency and full-width half maxima of certain modes.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Oleg Utesov, Sergei Koniakhin, Andrey G. Yashenkin
Summary: Optical phonons in nanoparticles with randomness of interatomic bonds are studied both analytically and numerically. The study shows that, at weak dilute disorder, two qualitatively different regimes of separated and overlapped levels are observed. Furthermore, the research focuses on the effect of volume optical phonons repelling from the disordered shell, resulting in a unique Raman spectrum with narrow peaks from the pure particle core and a wide signal from the disordered shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Muhammad Hadi, Emad H. Raslan, Rajesh Kumar, Muhammad Farzik Ijaz, Abdulaziz K. Assaifan
Summary: The synthesis of vanadium-doped BCZT ceramic oxides was reported in this paper, confirming the existence of a solubility limit of V in BCZT ceramics. Analysis revealed the influence of crystal structure and formation of oxygen vacancies on the luminescence and electrical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Richard J. Wilbraham, Elizabeth A. Howett, Colin Boxall, David I. Hambley, Jessica K. Higgins
Summary: This paper presents a detailed study on the chemical and materials characterization of novel Simulated Spent Nuclear Fuels (SIMFuel) that replicate the state of Spent Nuclear Fuel (SNF) discharged from a UK Advanced Gas-cooled Reactor (AGR). The study evaluates the use of XPS, micro-Raman spectroscopy, and XRD in characterizing SIMFuels, and reveals the effects of lanthanide dopants on the UO2 bulk matrix. The findings suggest the presence of U(V) in the UO2 matrix as a means of charge compensation for the incorporation of Ln(III) states, and provide insights into the O/U ratios in SIMFuels.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Poojitha Bommareddy, Ankit Kumar, Anjali Rathore, Devesh Negi, Surajit Saha
Summary: This study explores the crystallographic phase diagram of Ba1-xSrxMnO3 and the correlation between phonons and spins through magnetization and inelastic light scattering measurements. The system undergoes a series of crystallographic phase transitions as a function of Sr doping, with all compositions showing a paramagnetic-to-antiferromagnetic transition. Anomalous temperature dependence of phonons in specific phases is observed due to spin-phonon coupling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ouafa Benazouz, Faouzi Kezzoula, Javier Schmidt, Youssef Larbah, Mohamed Kechouane
Summary: This study investigates the nickel-induced crystallization method for crystallizing hydrogenated amorphous silicon thin films on glass substrates. The results suggest that the dehydrogenation step may not be essential for achieving crystallization in hydrogenated amorphous silicon layers.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
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
Spectroscopy
Weihong Xue, Kuan Zhai, Hu Wang, Xiang Wu, Wen Wen, Shuangmeng Zhai
Summary: The Raman spectra and X-ray diffraction patterns of Mg2P2O7 polymorphs were investigated at different temperatures, revealing the temperature dependence of their Raman vibrations and force constant evolution. The study provides valuable data on the thermal properties of Mg2P2O7 polymorphs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
J. Niskanen, A. Vladyka, J. Niemi, C. J. Sahle
Summary: In this study, we explore the sensitivity of several core-level spectroscopic methods to the atomistic structure using water molecule as a test system. We define a metric to measure the magnitude of spectral change as a function of structure, which enables us to identify structural regions with high spectral sensitivity. By employing machine-learning emulator-based decomposition of structural parameter space, we are able to recover more spectral variance and identify spectroscopically dominant degrees of freedom.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Chemistry, Physical
Khalid Mujasam Batoo, Ritesh Verma, Ankush Chauhan, Rajesh Kumar, Muhammad Hadi, Omar M. Aldossary, Y. Al-Douri
Summary: This study reported the synthesis of Gd and Nb co-doped BT ceramic oxides and investigated their structural and electrical properties. Various analysis techniques were used to characterize the samples, revealing the influence of Gd and Nb doping on the electrical properties of the ceramic materials, which were found to improve with increasing dopant concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Kosuke Muraoka, Seiji Ishikawa, Hiroshi Sezaki, Maeda Tomonori, Satoshi Yasuno, Tomoyuki Koganezawa, Shin-Ichiro Kuroki
Summary: The thickness of SiO2/BaOx layers affects the structural and interfacial properties of layered gate dielectric on 4H-SiC. Deposition of SiO2 layer on BaOx layer alters the stoichiometry and distribution of Ba-silicate in the gate dielectric. Increase in BaOx thickness leads to a transition from amorphous to poly-crystalline crystal structure.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Teodor I. Milenov, Dimitar A. Dimov, Ivalina A. Avramova, Stefan K. Kolev, Dimitar V. Trifonov, Georgi V. Avdeev, Daniela B. Karashanova, Biliana C. Georgieva, Kamen V. Ivanov, Evgenia P. Valcheva
Summary: This study focuses on the evaluation of the influence of chemical treatment on the structure and morphology of carbon phases. The chemical interactions of two types of graphite and carbon black with acetone, toluene, and phenol were studied. Experimental and theoretical methods were used to determine the chemical and phase composition, as well as the morphology and structure. The findings suggest that the treatment of graphite powders and carbon black with acetone, toluene, or phenol can be an effective preliminary stage for their modification and conversion into graphene-like phases.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shuhang Liu, Jun Han, Rongli Cui, Xin Yang, Yunfan Fei, Xingyu Tang, Yida Wang, Yajie Wang, Yongjin Chen, Jiajia Feng, Haiyan Zheng, Kuo Li, Xiaoyang Liu
Summary: In this work, Gd-doped diamond was synthesized from an endohedral metallofullerene (EMF) under high pressure and high temperature conditions. The experiments showed that Gd was uniformly distributed in the diamond lattice, exhibiting dilute paramagnetic properties, and the lattice parameters of diamond were enlarged. This study provides insights into the synthesis of other metal-doped diamond materials.
INORGANIC CHEMISTRY FRONTIERS
(2023)
