Article
Chemistry, Multidisciplinary
Oleg S. Kudryavtsev, Rustem H. Bagramov, Arkady M. Satanin, Andrey A. Shiryaev, Oleg I. Lebedev, Alexey M. Romshin, Dmitrii G. Pasternak, Alexander Nikolaev, Vladimir P. Filonenko, Igor I. Vlasov
Summary: Diamonds, when hydrogenated, exhibit negative electron affinity, high p-type surface electrical conductivity, and a transparency peak in the infrared absorption spectrum. This discovery opens up new possibilities for exploring the physics of electron-phonon coupling in undoped semiconductors and the application of hydrogenated nanodiamonds as a new optical material with induced transparency in the infrared range.
Article
Engineering, Electrical & Electronic
Jamelah S. Al-Otaibi, Aljawhara H. Almuqrin, M. I. Sayyed, Ashok Kumar
Summary: In this study, PBZB glasses were prepared using a melt quenching technique. The properties of the glasses were analyzed using XRD, FTIR, Raman, and UV-Vis spectroscopy. The radiation-shielding performance of the glasses was investigated using PHY-X software. The results showed that glasses with a higher content of PbO exhibited better shielding properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
B. L. Zhu, J. Hu, M. Xie, J. Wu, X. W. Shi
Summary: The Cu-doped ZnO films were prepared at different substrate temperatures (150 and 300 degrees C) with varying H2 flux. The structure and electrical-optical properties of the films were characterized using XRD, SEM, AFM, XPS, Raman spectra, resistivity, transmittance spectra, and PL spectra. The results show that the films prepared at 300 degrees C have thinner thickness, lower crystallinity, and larger surface roughness compared to those at 150 degrees C after introducing H2. The films prepared at 300 degrees C exhibit higher Zni and Cu contents but lower VO content. The Raman scattering peaks are found to be mainly related to the type and number of point defects. The films prepared at 300 degrees C have lower resistivity but higher electrically conductive stability compared to those prepared at 150 degrees C. The UV emission of the films is significantly enhanced at higher H2 fluxes at both substrate temperatures. However, the Eg is smaller and the UV emission is weaker after introducing H2 at 300 degrees C. The violet-blue and green-yellow emissions in the films mainly originate from Zni and VO, respectively. Various possible functions of hydrogen are discussed, and the changes in the structure and optical-electric properties of the films with H2 flux and substrate temperature are explained accordingly.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zhiliang Jin, Youlin Wu
Summary: Graphdiyne (GDY), a new two-dimensional carbon hybrid material, has gained significant attention due to its unique properties in photocatalytic activity. In this study, researchers successfully developed a new method for the low-cost and high-yield production of GDY. Experimental results demonstrated that this one-pot conjugation method offers simplicity and obvious universality.
Article
Materials Science, Ceramics
R. Umamaheswara Singh, K. Chandra Sekhar, Jamila S. Alzahrani, Z. A. Alrowaili, Md. Shareefuddin, Y. Purushotham, I. O. Olarinoye, M. S. Al-Buriahi
Summary: The study focuses on the physical and structural aspects of B2O3-CdO-ZnO-Na2O glasses reinforced by MoO3 ions. The amorphous nature of the samples was confirmed by the absence of strong peaks in the XRD spectra. Optical, Raman, and radiation-shielding qualities were evaluated and described. Structural changes were investigated using FTIR and Raman spectra. The density of the samples increased with the addition of MoO3, and the band gap decreased due to the transition of Mo6+ to Mo5+ ions. The glasses showed potential as environmentally friendly and transparent radiation barriers in nuclear facilities.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jie Zheng, Cheng Zhang, Hong Li, Xianchao Liu, Yijia Huang, Jianqi Zhu, Zhilin Yang, Ling Li
Summary: In this study, highly uniform Si3N4 all-dielectric metasurfaces as sensing platforms were successfully fabricated using nanosphere self-assembly and plasma enhanced chemical vapor deposition techniques. Experimental and simulated results showed that the proposed Si3N4 all-dielectric metasurfaces exhibited multiple optical resonant modes in the ultraviolet and visible wavelength and showed distinct field confinement in the gaps of nanoparticles. The hotspots were successfully adjusted to the surface of Si3N4 nanoparticles. Si3N4 all-dielectric metasurfaces showed characteristic wavelength shifts with refractive index variation and achieved a sensitivity of 707 nm per RIU for trace detection as sensing substrates. Proposed Si3N4 all-dielectric metasurfaces hold promise as high-sensitive sensing substrates in the ultraviolet and visible wavelength with the ease of high-throughput fabrication.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
K. Manjunatha, Ming-Kang Ho, Tsu-En Hsu, Hsin-Hao Chiu, Tai-Yue Li, B. Vijaya Kumar, P. Muralidhar Reddy, Ting San Chan, Yu-Hao Wu, Bi-Hsuan Lin, Artashes Karmenyan, Chia-Liang Cheng, Ashish Chhaganlal Gandhi, Sheng Yun Wu
Summary: In this study, Sn-doped Cd1-xSnxWO4 nanorods were prepared and it was found that increasing Sn concentration led to a decrease in crystallite size and PL intensity. Additionally, the increase in Sn content resulted in a change in emission color and different decay lifetimes. The findings provide insights into the electron transitions and emission properties of Sn-doped CdWO4 nanorods.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Karanpal Singh, Nancy, Harpreet Kaur, Pushpender Kumar Sharma, Gurjinder Singh, Jagpreet Singh
Summary: The study synthesized undoped and Cobalt-doped zinc oxide nanoparticles (Co doped ZnO NPs) and confirmed the incorporation of the Co dopant through spectroscopic and microscopic techniques. The Co-doped ZnO NPs showed a red shift in the UV-absorption spectra and a decrease in band gap value, indicating successful integration of Co2+ ions into the ZnO matrix. The synthesized NPs exhibited excellent photocatalytic and antimicrobial activity, with 1% Co-doped ZnO showing the highest photocatalytic efficiency.
Article
Physics, Applied
Rapaka S. C. Bose, Abanti Nag
Summary: The study investigated the effects of dual-doping and triple-doping in ZnO systems, highlighting the impact of different dopants on electrical resistivity and thermal conductivity. Chemical doping was found to play a crucial role in controlling the interdependent electrical and thermal transport properties in ZnO systems, leading to superior thermoelectric performance in specific compositions.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
B. Pilarek, M. Ptak, R. Lisiecki, L. Macalik, S. Smolka, I. Szczygiel, J. Hanuza
Summary: Research shows the existence of a new solid solution in the CaO-Nd2O3-Nb2O5 ternary oxide system. The dependence of various spectra and luminescence properties on mixture composition has been reported. Dilution of Nd3+ ions by gadolinium and lanthanum improves the luminescence properties. Spectroscopic measurements provide insights into the depopulation mechanism of Nd3+ electron excited states in the materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yun Guang Zhu, Graham Leverick, Livia Giordano, Shuting Feng, Yirui Zhang, Yang Yu, Ryoichi Tatara, Jaclyn R. Lunger, Yang Shao-Horn
Summary: In this study, the authors demonstrate that the use of molten nitrate as electrolyte in Li-O-2 batteries promotes the oxygen reduction reaction by electrochemical reduction of nitrate and subsequent chemical oxidation of nitrite by molecular oxygen. This approach enhances battery performance.
Article
Materials Science, Ceramics
Muhammad Shahid Nadeem, Tauseef Munawar, Faisal Mukhtar, Muhammad Naveed Ur Rahman, Muhammad Riaz, Faisal Iqbal
Summary: In this study, pure ZnO and iron (Fe) and cobalt (Co) co-doped ZnO nanoparticles were successfully synthesized and characterized using XRD, FTIR, SEM, and UV-vis spectroscopy. The results showed that the dopants influenced the structural parameters, energy bandgap, and photocatalytic activity of the ZnO nanoparticles. The optimized concentration of 6%Fe and 4%Co exhibited the highest photocatalytic efficiency and antibacterial activity against different dyes and bacterial strains.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Axel Molle, Alain Dubois, Jimena D. Gorfinkiel, Lorenz S. Cederbaum, Nicolas Sisourat
Summary: Interatomic Coulombic electron capture (ICEC) is an environment-assisted process where a free electron can efficiently attach to a quantum system by transferring excess energy to a neighbor ionizing it. Fano profiles appear in ICEC cross sections due to interferences between ICEC final and resonant states, even at large system-neighbor separations. Resonant states in ICEC have various decay pathways, possibly involving long-range electron and energy transfer. The interferences in ICEC can lead to substantial enhancement or decrease of cross sections, making this investigation relevant to various contexts involving electron capture in an environment.
Article
Chemistry, Multidisciplinary
Jose Angel Pariente, Farzaneh Bayat, Alvaro Blanco, Antonio Garcia-Martin, Carlos Pecharroman, Manuel I. Marques, Cefe Lopez
Summary: By preparing colloidal crystals with random missing scatterers, crystals are created where disorder is embodied as vacancies in an otherwise perfect lattice. In this system, there is a critical defect concentration where light propagation undergoes a transition from a perfect reflector to an enhanced transmission phenomenon. This behavior can be phenomenologically described in terms of Fano-like resonances.
Article
Materials Science, Ceramics
G. H. A. Melo, N. F. Dantas, F. R. Muniz, D. Manzani, M. de Oliveira Jr, F. Pedrochi, A. Steimacher
Summary: This study investigated the influence of ZnO content on the structural and radiation shielding parameters of zinc borophosphate glass. The glass samples were prepared using the melt-quenching technique and their structural characteristics were analyzed using various techniques. The results showed that the replacement of BO4 and PO4 units by BO3 and PO4 1/2 units led to changes in the structural characteristics and an increase in non-bridging oxygen. The density increased by up to 43% and the glass transition temperature showed reduction followed by stability with the replacement of P2O5 by ZnO. The rise in ZnO content also improved the radiation attenuation parameters, making the glass system a suitable choice for high-energy ionizing radiation attenuation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Ermias Libnedengel Tsege, Soo Kyung Cho, Lemma Teshome Tufa, Van Tan Tran, Jaebeom Lee, Hyung-Kook Kim, Yoon-Hwae Hwang
JOURNAL OF MATERIALS SCIENCE
(2018)
Article
Chemistry, Multidisciplinary
Trang Nguyen Thi Thuy, Timur Sh. Atabaev, Hong Ha Thi Vu, Dongyun Lee, Hyung Kook Kim, Yoon-Hwae Hwang
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
Timur Sh. Atabaev, Hong Ha Thi Vu, Yoon-Hwae Hwang, Hyung-Kook Kim
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2017)
Article
Chemistry, Physical
Abebe Belay, Hyung Kook Kim, Yoon-Hwae Hwang
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2017)
Article
Physics, Multidisciplinary
Hong-Yeol Park, Hyung Kook Kim, Yoon-Hwae Hwang, Dong-Myeong Shin
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Polymer Science
Um Kanta Aryal, Ho-Yeol Park, Woosum Cho, Sung-Ho Jin, Yoon-Hwae Hwang, Hyung-Kook Kim
MACROMOLECULAR RESEARCH
(2018)
Article
Chemistry, Physical
Taewoo Kim, Sangheon Jeon, Saifullah Lone, Song Jun Doh, Dong-Myeong Shin, Hyung Kook Kim, Yoon-Hwae Hwang, Suck Won Hong
Article
Materials Science, Multidisciplinary
Kakaraparthi Kranthiraja, Veera Murugan Arivunithi, Um Kanta Aryal, Ho-Yeol Park, Woosum Cho, Junyoung Kim, Saripally Sudhaker Reddy, Hyung-Kook Kim, In-Nam Kang, Myungkwan Song, Sung-Ho Jin
ORGANIC ELECTRONICS
(2019)
Article
Biochemistry & Molecular Biology
Dong Hoon Kang, Soo Han Oh, Jae-Hyeon Ko, Kwang-Sei Lee, Seiji Kojima
Summary: The inelastic interaction between incident photons and acoustic phonons in taurine single crystal was investigated using Brillouin spectroscopy, determining temperature dependences of sound velocity, acoustic absorption coefficient, and elastic constants. The elastic behaviors could be explained based on normal lattice anharmonicity, and no evidence for structural phase transition was observed. The birefringence in the ac-plane indirectly estimated from split longitudinal acoustic modes was consistent with one theoretical calculation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Chemistry, Physical
Seiji Kojima
Summary: Brillouin scattering is a non-contact and non-destructive method used to measure sound velocity and attenuation, and to study the elastic properties and phase transitions of materials. Nowadays, it is extensively used to measure various elementary excitations and quasi-elastic scattering.
Review
Chemistry, Physical
Venkatasubramanian Sivasubramanian, Sarveswaran Ganesamoorthy, Seiji Kojima
Summary: Compositionally disordered perovskite compounds have been a popular topic of research in recent years. These materials exhibit colossal piezoelectric and electrostrictive effects. The physical behavior of these compounds is influenced by the nucleation and growth of polar nanoregions (PNRs), which are local dipolar regions. The relaxation dynamics of PNRs show various stages, as revealed through Raman scattering and Brillouin scattering studies.
Article
Chemistry, Physical
Seiji Kojima, Md Aftabuzzaman, Jan Dec, Wolfgang Kleemann
Summary: Uniaxial ferroelectrics with tetragonal tungsten bronze structure are important functional materials with various properties. This study focuses on the dynamical properties of CSBN100x single crystals, ranging from relaxor to normal ferroelectric behavior. The results show that the elastic anomaly and relaxation time slowing down become more diffusive as the CBN28 content decreases. The origin of the crossover from relaxor to normal ferroelectric phase transitions is discussed in terms of the difference in the A1 and A2 sites' occupancies.
Article
Nanoscience & Nanotechnology
Nang Dinh Nguyen, Hyung-Kook Kim, Dinh Lam Nguyen, Duc Cuong Nguyen, Phuong Hoai Nam Nguyen
ADVANCES IN NATURAL SCIENCES-NANOSCIENCE AND NANOTECHNOLOGY
(2019)
Review
Optics
Seiji Kojima
Article
Instruments & Instrumentation
Dong-Myeong Shin, Jong-ryul Choi, Jin-Woo Oh, Hyung Kook Kim, Dong-Wook Han, Kyujung Kim, Yoon-Hwae Hwang
APPLIED SPECTROSCOPY REVIEWS
(2018)
Article
Materials Science, Multidisciplinary
Honggyun Kim, Jamal Aziz, Vijay D. Chavan, Deok-kee Kim
Summary: Silicon nitride films were prepared using plasma enhanced chemical vapor deposition with different trap densities induced by adjusting the RF power ratio. It was found that the film's trap density was lowest under compressive stress and increased under tensile stress. This study has significant implications for the formation of durable nitride films in various electronic and optoelectronic applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Qiang Yu, Huwei Zhao, Yue Zhao
Summary: Zinc oxide thin films and Al-doped zinc oxide films were prepared and characterized in this study. The addition of Al ions was found to change the growth orientation, increase the grain size, and enhance the absorption intensity in the visible light region. Furthermore, the addition of Al ions also increased the forward current in the heterojunction.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Sang Woo Lee, Min Sun Park, Sangwon Wi, So Yeon Lim, Yeseul Lee, Jin-Seok Chung, Sang Mo Yang
Summary: In this study, we investigated the dynamics of domain switching in pristine and fatigued BiFeO3 capacitors through experimental observations and measurements. The results showed that the switching in the pristine capacitors was dominantly driven by domain growth, while the fatigued capacitors exhibited two different switching dynamics, in which nucleation played a critical role.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Boshi Wang, Tianyi Wang, Yufang Liu, Kun Yu
Summary: In this paper, a tunable and anisotropic perfect absorber composed of anisotropic black phosphorus (BP) and isotropic graphene is proposed. The structure exhibits high absorption and strong anisotropic plasma response. The resonance characteristics can be effectively controlled by adjusting geometric parameters and doping levels, offering potential applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaolan Liu, Chunyang Li, Tonghui Yang, Naiqiang Yin, Gangling Zhao
Summary: Water drop triboelectric nanogenerators (WD-TENGs) can harvest energy from raindrops and improve the output performance of TENGs.
CURRENT APPLIED PHYSICS
(2024)
