Article
Chemistry, Physical
Chiara Olla, Stefania Porcu, Francesco Secci, Pier Carlo Ricci, Carlo Maria Carbonaro
Summary: This study investigated the possibility of introducing N-N bonding in the carbon network of Carbon Dots through hydrothermal synthesis, and validated it through experiments and computational simulations.
Article
Biochemistry & Molecular Biology
Erik Cerrato, Alberto Privitera, Mario Chiesa, Enrico Salvadori, Maria Cristina Paganini
Summary: Due to its thermal stability, conductivity, high exciton binding energy and high electron mobility, zinc oxide is one of the most studied semiconductors in the field of photocatalysis. Doping the lattice with foreign atoms can introduce defects within the bandgap, making zinc oxide optically active in the visible range and reducing the energy required for photo-driven charge separation. This study demonstrates a green synthetic procedure for achieving high-level doping and highlights the importance of thermal treatment in selecting the nature of the defect and the material's capability for specific chemistry. The low-temperature treatments were found to produce material with higher efficiency in the water photosplitting reaction.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
C. N. Saunders, D. S. Kim, O. Hellman, H. L. Smith, N. J. Weadock, S. T. Omelchenko, G. E. Granroth, C. M. Bernal-Choban, S. H. Lohaus, D. L. Abernathy, B. Fultz
Summary: In this study, inelastic neutron scattering measurements were used to observe phonons in cuprite single crystal at different temperatures. The results showed that the temperature-dependent phonon behavior was predicted more accurately with anharmonic calculations than quasiharmonic calculations.
Article
Optics
Manohar Singh, Anit K. Ambedkar, Shrestha Tyagi, Virendra Kumar, Prashant Yadav, Ashwani Kumar, Yogendra K. Gautam, Beer Pal Singh
Summary: In this study, pure ZnO and Cu-doped ZnO thin films were deposited on a glass substrate using reactive co-sputtering. The structural, morphological, and optical properties of the thin films were characterized. The results showed that Cu doping modified the crystal structure, surface morphology, and optical properties of ZnO thin films. These findings are important for the research and applications of Cu-doped ZnO thin films.
Article
Polymer Science
Taher Ghrib, Imen Massoudi, Amal L. Al-Otaibi, Amal Al-Malki, Aya Kharma, Eman Al-Hashem, Rawan A. Al-Ghamdi, Ruba A. Al-Zuraie
Summary: Terbium-doped zinc oxide nanopowders with different Tb concentrations were synthesized and studied for their photocatalytic properties, showing enhanced optical absorption in the visible range, adjustable fluorescence emission wavelengths, and improved degradation efficiency of methylene blue dye under UV-Vis irradiation.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Chemistry, Physical
Amaresh Das, Durga Basak
Summary: This study investigates the evolution of various point defects in lithium ion-implanted zinc oxide nanorods through experimental and simulation methods. The results show that the lithium ions form Li-Zn acceptors and increase the structural disorder and number of oxygen vacancies in the nanorods. These acceptors and defects contribute to the high resistivity and change in photoluminescence emission of the nanorods.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Suotao Dong, Xiuhua Fu, Zhongyao Zhu, Cheng Li
Summary: This article introduces a method to enhance surface Raman scattering by utilizing the local surface plasmon resonance phenomena. By depositing silver on the surface of zinc oxide thin films with different pH values, the Raman scattering signal is significantly improved, and the optimal acid-base environment is identified.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Zongge Li, Danni Wang, Huifang Li, Mang Ma, Ying Zhang, Zifeng Yan, Stefano Agnoli, Guoxin Zhang, Xiaoming Sun
Summary: This study demonstrates the potential of N-doped porous CMs with redox-able Zn atoms to achieve high Zn/N loading, pseudocapacitive behavior, and cycling stability, laying the foundation for a new type of high Zn/N-loading carbon materials.
Review
Polymer Science
Tan Mao, Mengchen Liu, Liyuan Lin, Youliang Cheng, Changqing Fang
Summary: This paper summarizes the recent research on zinc oxide photocatalysts at home and abroad, introduces the methods of doping and compounding with other substances, and discusses the prospects of further improving catalytic efficiency.
Article
Engineering, Chemical
Sripansuang Tangsuwanjinda, Yu-Yu Chen, Ching-Hsiang Lai, Guan-Ting Jhou, Yu-Wei Chiang, Hsin-Ming Cheng
Summary: The study reported a method to detect Hg2+ at the quadrillionth level using surface-enhanced Raman scattering technique, with the use of silver nanoparticles and zinc-oxide tetrapod structure creating a powerful detection platform. The successful detection of Hg2+ in natural water and beverages demonstrated the potential of SERS sensors for practical applications in detecting Hg2+.
Article
Materials Science, Multidisciplinary
Kaimin Cui, Yuqing Wen, Xiaoyu Han, Zhenbang Hao, Jihong Zhang, Jun Xie
Summary: Suitable incorporation of Zn2+ ions into CsPbBr3 quantum dots enhances luminescence efficiency and chemical stability, as well as modifies the emission bands. This study successfully introduced high content Zn2+ ions into CsPbBr3 quantum dots, resulting in a new intense blue emission and green emission, depending on the ZnBr2/PbBr2 precursor ratio. The analysis confirmed the formation of CsZnxPb1-xBr3 alloyed quantum dots with different Zn alloy compositions.
Article
Materials Science, Multidisciplinary
K. G. Girija, Ramana Kumar, A. K. Debnath
Summary: Material and synthesis compatibilities are crucial for integrated sensor systems. Zinc oxide (ZnO) is a promising material for gas-sensing applications due to its properties and compatibility with silicon fabrication technology. This study presents enhanced H2S response in nitrogen-doped ZnO (NZO) thin films achieved through controlled Ar:N-2 ratio. The films exhibited vertically oriented nanograins with high crystallinity, and the maximum response was achieved at an operating temperature of 300 degrees C with an Ar:N-2 ratio of 2:1.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Chunlei Huang, Shaoping Jiang, Fangxia Kou, Minting Guo, Shuang Li, Genjian Yu, Biao Zheng, Fengyan Xie, Cheng Zhang, Hualiang Yu, Jun Wang
Summary: In response to the issue of melamine adulteration in milk, we propose a highly sensitive surface-enhanced Raman scattering substrate that can effectively detect melamine in milk.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
M. M. Zeidan, S. Abedrabbo
Summary: Modified Am-241-Be neutron beams can change the optical properties of zinc oxide (ZnO) photoluminescence (PL) spectra by transmuting zinc (Zn) into gallium (Ga) after irradiation. This study investigates the time required by slow neutron irradiation to register the transmutation of Zn into Ga. Two series of samples from different suppliers (TEW Tokyo Denpa Co. Ltd., Tokyo, Japan and MTI corporation, China) are irradiated for 6, 12, 18, and 24 days on the Zn-polar face of each sample to determine the relationship between irradiation intensity and transmutation.
Article
Chemistry, Physical
V. N. Kazuchits, N. M. Kazuchits, M. S. Rusetskiy, O. Korolik, A. Konovalova, O. Ignatenko
Summary: The paper investigates the effects of RHPHT annealing on synthetic Ib-type diamond plates at high temperatures and pressures. The process resulted in inhomogeneous plastic deformation of diamond plates, generating vacancies and nitrogen defects. Higher temperatures during RHPHT annealing led to the formation of more complex nitrogen aggregates. The number of defects was significantly greater after RHPHT annealing compared to quasi-stationary HPHT annealing.
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)