Article
Chemistry, Physical
Giacometta Mineo, Mario Scuderi, Elena Bruno, Salvo Mirabella
Summary: In this study, hexagonal/monoclinic WO3 phase junctions were formed by calcination of WO3 nanorods at 400 degrees C, leading to improved catalytic performance for HER. The highest efficiency of HER was achieved when WO3 nanorods exhibited comparable volumes of hexagonal and monoclinic phases.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pei-Tzu Lee, Wan-Zhen Hsieh, Cheng-Yu Lee, Yu-Hsuan Huang, Ching-Yu Chiang, Ching-Shun Ku, C. R. Kao, Cheng-En Ho
Summary: The allotropic phase transformation of Cu6Sn5 from a hexagonal to monoclinic structure at 186 degrees C is studied using synchrotron white X-ray Laue diffraction method, which successfully distinguishes the η and η' structures and proposes a two-stage phase transformation kinetics.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Rene Doeren, Martin Panthoefer, Leon Praedel, Wolfgang Tremel, Mihail Mondeshki
Summary: Mixed-valence tungsten bronzes with adaptive structural and compositional features have attracted significant attention in thermoelectrics, electrochromics, catalysis, and battery electrodes. This study focuses on the characterization of Li+ cations using NMR experiments and provides insights into their spatial connectivity and chemical exchange properties.
Article
Chemistry, Physical
H. S. Lokesha, K. R. Nagabhushana, Fouran Singh, S. H. Tatumi, A. R. E. Prinsloo, C. J. Sheppard
Summary: The study examined the defects and spectroscopic properties of monoclinic ZrO2 and ZrO2:Sm3+ phosphor under 100 MeV Si7+ ion excitation utilizing ion beam analysis methods. Various experimental techniques were used to evaluate the structural parameters and properties of the samples, revealing characteristic emission peaks and transitions under ion excitation. Additionally, the thermal spike model was implemented to estimate the ion track radius and local temperature induced by ion excitation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Z. Siti Rozaila, Wayne Hutchison, Hans Riesen
Summary: We studied the photoluminescence properties of the 4f(6 7)F(0) (A(1g)) & RARR; 4f(5)5d (T-1u) transition in Sm2+ doped CaF2 nanocrystals and observed Zeeman effects and persistent spectral hole-burning. The luminescence of the 4f(5)5d (A(1u)) & RARR; 4f(6 7)F(1) (T-1g) transition was observed at 708.2 nm, along with weak transitions at 690.2 nm and 703 nm. The spectral hole-burning exhibited Lorentzian line shape and first-order dispersive burning kinetics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
G. L. Sharipov, B. M. Gareev, K. S. Vasilyuk, D. I. Galimov, A. M. Abdrakhmanov
Summary: The spectra of moving single-bubble sonoluminescence have been studied in trichloride solutions of Sm, Tm, and Yb in water and ethylene glycol. It is found that the Sm3+ salt in ethylene glycol exhibits a wide luminescence maximum at 754 nm. The formation of *Sm2+ by reduction of Sm3+ in ethylene glycol is concluded based on the analysis of sonoluminescence properties of different lanthanide ions and the influence of the electron acceptor H+. However, the formation and sonochemiluminescence of *Tm2+ and *Yb2+ under the same conditions were not observed. The generation and light emission of *Men+ metal ions upon reduction of Me(n+1)+ by solvated electron is a general phenomenon for transition metals if the reduction reaction energy is sufficient for electronic excitation of Men+.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Chenwei Xu, Chenxia Li, Degang Deng, Jianxun Lu, Hua Yu, Le Wang, Xufeng Jing, Shiqing Xu, Chunxu Shao
Summary: A series of BaAl12O19:Sm2+/SrAl12O19:Sm3+ mixed-phase phosphors were prepared using the solid-phase process, and their temperature measurement ability was studied. The coexistence of Sm2+ and Sm3+ in the mixed-phase host allows for temperature measurement based on the fluorescence intensity ratio. The phosphors showed excellent temperature measurement performance in the range of 313-513K.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Atomic, Molecular & Chemical
Hong-yan Yan, Cheng-bing Qin, Lian-tuan Xiao
Summary: In this study, the optical properties of GaTe nanoflakes with different thicknesses were investigated. The coexistence of monoclinic and hexagonal phases in GaTe nanoflakes was observed through spectral analysis. The optical gap and exciton-phonon interaction strength of the hexagonal phase were determined based on temperature-dependent PL spectra.
CHINESE JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Optics
Pu Fan, Zongjie He, Yuhui Chen, Xiao He, Cong Huang, Qiqi Miao, Qi Zhang, Xiaoguang Liu, Ling Li
Summary: Eu3+/Eu2+ and Sm3+/Sm2+ co-doped LiSrB9O15 phosphors were synthesized by high temperature solid-state method in air atmosphere. The self-reduction phenomenon of Eu3+ to Eu2+ and Sm3+ to Sm2+ was observed in the samples prepared in air atmosphere. The luminescence color of the phosphors can be adjusted by changing the excitation wavelength. Moreover, the near ultraviolet luminescence of LiSrB9O15:Eu phosphor has potential applications in pest control, plant growth promotion, and ultraviolet medical treatment.
JOURNAL OF LUMINESCENCE
(2022)
Article
Energy & Fuels
Jong Bae Kim, Donguk Lee, In Hyeok Yeo, Ho Young Woo, Dong Wan Kim, Ji-Yeon Chae, Da Won Lee, Seung Ho Han, Taejong Paik
Summary: The hydrothermal synthesis of monoclinic-phase vanadium dioxide (VO2(M)) has been extensively studied for energy-saving smart windows. Structures and compositions of vanadium precursors significantly influence the hydrothermal synthesis products. W-doped VO2(M) NCs exhibit superior phase transition behaviors with reduced transition temperature depending on the W-doping concentration.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Ceramics
Songsong Wu, Yeqing Liu, Yingjun Guo, Yiyang Wang, Chengshuai Shao, Long Xia, Rui Zhang, Xin Geng, Xiaoxiao Huang, Guangwu Wen, Chunyan Ding
Summary: In this study, the authors successfully promoted the H-M phase transition of nonmagnetic barium aluminosilicate (BAS) glass-ceramics by incorporating Fe3+ dopants and adding magnetic barium ferrite (BFO), leading to the formation of the magnetic celsian phase.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Go Okada, Noriaki Ikenaga, Yasuhiro Koguchi, Takayuki Yanagida, Safa Kasap, Hidehito Nanto
Summary: In Sm3+-doped Li2CaSiO4, X-ray irradiation reduces Sm3+ ion to Sm2+ state, confirmed by the difference in photoluminescence spectra before and after irradiation. Prior to irradiation, only luminescence peaks from 4f-4f transitions of Sm3+ are observed, while an additional luminescence band at 900 nm appears due to 5d-4f transition of Sm2+. X-ray generated electrons are captured by Sm3+ ions, converting them to Sm2+ state. The conversion is reversible after a heat treatment, with activation energy of 0.40 and 0.52 eV. The reproducibility of Sm3+ to Sm2+ reduction, even after heat treatment, shows potential for radiation measurement applications.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
Lenka Pribusova Slusna, Karol Vegso, Edmund Dobrocka, Tatiana Vojtekova, Peter Nadazdy, Yuriy Halahovets, Michaela Sojkova, Jana Hrda, Marian Precner, Peter Siffalovic, Zhuo Chen, Yong Huang, Sergej Raznjevic, Zaoli Zhang, Martin Hulman
Summary: The applications and structural properties of molybdenum ditelluride in electronics, sensing, and spintronics were studied, and the textures and structures of different phases were analyzed.
Article
Chemistry, Physical
Dongdong Chen, Xin Zhang, Jinmei Lv, Junhu Qin, Jianhong Yi, Jikang Yan, Caiju Li, Congyan Leng, Hailong Bai, Shaofu Sun, Lingyan Zhao
Summary: The phase structure and composition of the Cu/Cu3Sn interface during aging at 150 degrees C were investigated using transmission electron microscopy. The newly formed Cu3Sn phase was hexagonal, while the Cu substrate was cubic. Fine monoclinic Cu grains formed at the Cu/Cu3Sn interface. The Cu3Sn/Cu interface exhibited specific crystallographic relationships after aging.
Article
Materials Science, Ceramics
Hai-Tao Zhou, Zhe-Nan Xu, Jian-Yun Yan, Hao Huang, Yan-Bo Guo, Kang Du, Wen-Zhong Lu, Wen Lei
Summary: In this study, (1 - x)BaAl2Si2O8-xCaSnSiO(5)-y wt.% LiF microwave dielectric ceramics were prepared through solid-state sintering at 950-1395 degrees C. The addition of LiF and adjustment of composition ratios optimized the microwave dielectric properties of the ceramics, which could potentially be applied in the low-temperature co-fired ceramic (LTCC) field.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
