Article
Materials Science, Ceramics
Yunpeng Zheng, Mingchu Zou, Wenyu Zhang, Di Yi, Jinle Lan, Ce-Wen Nan, Yuan-Hua Lin
Summary: High-entropy strategy and defect engineering were used to significantly suppress thermal conductivity and optimize electrical conductivity in SrTiO3-based thermoelectric ceramics. The minimum thermal conductivity in high-entropy TiO3 bulks can be reduced to 1.17 W/(m • K), with a power factor of 295μW/(m • K-2), and a ZT value of 0.2 at 873K.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Chemistry, Multidisciplinary
Xiaohui Yan, Junkun Wu, Xiuyun Lei, Lunhua He, Wenbin Guo, Xiaojun Kuang, Congling Yin
Summary: A 12-layer hexagonal perovskite Ba4SbMn3O12 with a 12R polytype structure has been synthesized and investigated. Ba4SbMn3O12 exhibits a paramagnetic state at 100-200 K and undergoes a disassociation into individual Mn ions at 250-300 K. The ferromagnetic interaction between Mn-3 clusters in Ba4SbMn3O12 is mediated by Mn3+ ions, resulting in the formation of dynamic ferromagnetic clusters below T-D = ~70 K and a ferromagnetic spin freezing transition at T-g = ~11.5 K. The stability of Mn-3 magnetic clusters in the 12R polytypes is determined by the intracluster Mn-Mn distance.
Article
Materials Science, Multidisciplinary
Fumito Fujishiro, Chinatsu Sasaoka, Masatsugu Oishi, Takuya Hashimoto, Katsumi Shozugawa, Motoyuki Matsuo
Summary: The cubic perovskite oxide Ba1-xSrxFe0.9In0.1O3-delta (BSFI) was prepared with varying number of oxide ion vacancies by heating in N-2 and O-2 to investigate the relationship among the local structure of Fe-O polyhedra, the chemical state of Fe ions, and their electrical conductivities. It was found that the mobility of small polamns and the number of charge carriers increased with Sr content, resulting in enhanced electrical conductivity in both N-2 and O-2 heated specimens.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Multidisciplinary
J. Blasco, J. A. Rodriguez-Velamazan, G. Subias, M. C. Sanchez, J. L. Garcia-Munoz
Summary: The magnetism of SmBaMn2O5 was studied using magnetic and neutron diffraction measurements on a single crystal. The compound has an oxygen deficient perovskite structure with a layered ordering of Sm and Ba cations. The Mn atoms are arranged in a checkerboard pattern in the ab-plane, forming expanded-compressed pyramids. Below 134 K, the Mn moments exhibit ferrimagnetic ordering, while the Sm moments begin to polarize around 10 K in the ab-plane.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Biochemistry & Molecular Biology
Elmustafa Ouaaka, Mustapha Aazza, Aziz Bouymajane, Francesco Cacciola
Summary: Inorganic halide perovskites, specifically CsPbBr3 and Rb-doped CsPbBr3, were studied for their electronic, optical, thermoelectric, and elastic properties using DFT. The increase in doping content led to an increase in energy bandgap, which decreased after doping 0.75. These compounds have direct band gaps and varying energy gap values. Optical properties and thermoelectric results were also investigated. The importance of these materials lies in their potential applications in optoelectronics and solar cells.
Article
Physics, Multidisciplinary
Terumasa Tadano, Wissam A. Saidi
Summary: Understanding and predicting lattice dynamics in strongly anharmonic crystals is a longstanding challenge in condensed matter physics. In this study, a first-principles method is proposed to accurately predict the phonon spectrum with strong anharmonic broadening. The proposed method incorporates frequency renormalization effects by the bubble self-energy within the quasiparticle approximation. The results show that this method can accurately predict the phase transition temperature and phonon linewidth in anharmonic crystals.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Ahmed Mourtada Elseman
Summary: A novel HTM based on silver thiocyanate (AgSCN) was synthesized and characterized for its use in p-i-n perovskite solar cells (PSCs). Thin, conformal AgSCN films were produced using a fast solvent removal approach, enabling quick carrier extraction and collection. The addition of AgSCN improved charge transfer between the HTL and perovskite layer, leading to enhanced performance compared to PEDOT:PSS. Crystallographic discrepancies were observed in the perovskite film, indicating the development of templated perovskite on the surface of AgSCN. With a high open circuit voltage (V-OC) and power conversion efficiency (PCE) of 16.66%, AgSCN-based PSCs show great potential for application in flexible modules or as a front cell in hybrid tandem solar cells.
SCIENTIFIC REPORTS
(2023)
Article
Electrochemistry
Katsuhiro Nomura, Hiroyuki Shimada, Yuki Yamaguchi, Woosuck Shin, Yuji Okuyama, Yasunobu Mizutani
Summary: The phase transitions, thermal expansions, chemical expansions, and CO2 resistances of two different compositions of perovskite materials were investigated. The results show that the composition of the materials plays an important role in determining their properties.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
M. Mootabian, S. R. Ghorbani, A. Kompany, M. Ebrahimizadeh Abrishami
Summary: Through comparing the structural and electrical properties of La0.5Sr1.5Mn0.5T0.5O4 with La0.5Sr0.5Mn0.5T0.5O3 manganites, it was found that La0.5Sr1.5Mn0.5T0.5O4 has larger grain size and lower electrical conductivity due to the difference in their layered and perovskite structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ungsoo Kim, Sangjin Lee, Donghwan Koo, Yunseong Choi, Hyungmin Kim, Eunbin Son, Jeong Min Baik, Young-Kyu Han, Hyesung Park
Summary: In this study, a template-mediated growth approach was used to modulate the preferred crystal facet and electronic structure of La0.5Sr0.5CoO3 (LSC) for enhanced water-electrolysis performance. The (110) crystal facet of LSC grown on MoReS2 effectively lowered the free energy barrier of the rate-determining step, and the interfacial charge transfer between LSC and MoReS2 optimized the electronic structure of LSC. As a result, LSC grown on MoReS2 exhibited an OER activity of 210 mV, surpassing state-of-the-art perovskite oxide-based catalysts. These findings provide new insights into the design of efficient perovskite oxide-based electrocatalysts for water electrolysis.
ACS ENERGY LETTERS
(2023)
Article
Engineering, Chemical
Zhipeng Sun, Zilu Liu, Changkun Cai, Hong Deng, Fan Yang, Yao Lu, Xiwen Song, Shengli An, Hailei Zhao
Summary: Novel cobalt-free perovskite-type oxides have been successfully prepared and characterized for their structural stability and oxygen permeability. The cubic perovskite-type structure can be stabilized at ambient temperature, but the oxygen permeation flux is slightly decreased. The substitution of titanium for partial iron enhances the stability of the membrane against different atmospheres, but reduces oxygen permeability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Phuong Huyen Nguyen, Duc Hieu Nguyen, Donghyoung Kim, Mun Kyoung Kim, Jiseong Jang, Woo Hyeong Sim, Hyung Mo Jeong, Gon Namkoong, Mun Seok Jeong
Summary: This study investigates the regeneration of oxidized titanium carbide (Ti3C2Tx) through hydrofluoric acid (HF) post-treatment. The research reveals that the post-treatment can restore the structure and surface composition of MXene nanosheets, thereby improving their electrical conductivity and prolonging their conductivity maintenance time. This finding is crucial for the rational design of Ti3C2Tx-based devices and functional coatings.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Xubin Ye, Jianfa Zhao, Hena Das, Denis Sheptyakov, Junye Yang, Yuki Sakai, Hajime Hojo, Zhehong Liu, Long Zhou, Lipeng Cao, Takumi Nishikubo, Shogo Wakazaki, Cheng Dong, Xiao Wang, Zhiwei Hu, Hong-Ji Lin, Chien-Te Chen, Christoph Sahle, Anna Efiminko, Huibo Cao, Stuart Calder, Ko Mibu, Michel Kenzelmann, Liu Hao Tjeng, Runze Yu, Masaki Azuma, Changqing Jin, Youwen Long
Summary: The crystal structure of PbFeO3 is an unusual orthorhombic perovskite super unit cell with distinctive charge ordering. The presence of two different oxidation states of Pb and Fe leads to long range charge ordering in the -A-B-B- layers. The material exhibits weak ferromagnetic transition at 600K and spin reorientation towards a collinear antiferromagnetic structure at a lower temperature.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Bangzhi Ge, Ruoyan Li, Guohao Wang, Menghua Zhu, Chongjian Zhou
Summary: This article discusses the strategies for optimizing the performance of oxide thermoelectric ceramics, including electrical optimization and lattice thermal suppression. The authors point out that the large electronegativity difference between the metal and O ions in oxide leads to electron localization and strong bond energy, limiting the improvement of their thermoelectric performance. To address this issue, the authors propose a series of optimization strategies and predict potential breakthroughs in the future.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Siyi Xie, Junjie Huang, Yufeng Zhang, Weiwei Cai, Xueao Zhang
Summary: The study investigated the morphology and structure of vertical graphene (VG) on substrates with different electrical conductivities using scanning electron microscopy and Raman spectroscopy. It was found that VG with greater thickness could be grown on substrates with better electrical conductivity, although longer deposition times could lead to more defects in VG. The change in morphology and structure of VG was closely correlated with the strength of the electric field near the substrate surface, providing a new approach for orderly VG growth.
Article
Materials Science, Multidisciplinary
Muhammad Haris Azhar, Tayyaba Noor, Naseem Iqbal, Neelam Zaman, Sarah Farrukh
Summary: This study uses a novel adsorbent Metal Organic Framework (MOF) and its composites to adsorb CO2. Experiment results show that 5 wt% g-C3N4/Ni-BDC MOF exhibits the highest adsorption capacity.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ayumu Nodera, Shinya Aikawa
Summary: In this study, a CO2 sensor capable of low-temperature operation was fabricated using an open-channel-type thin-film transistor structure with a polar surface of an oxide semiconductor. The sensor showed a sensitivity 2.9 times greater than that under an inert N2 atmosphere at an operating temperature of only 150 degrees C. The results suggest that TFTs fabricated with polar surfaces of oxide semiconductors are useful for gas-sensing applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bindhyabasinee Mishra, Jyotirmayee Nanda, Subhra S. Brahma, K. J. Sankaran, R. Sakthivel, S. Ghadei, S. Suman
Summary: In this study, a series of polycrystalline mixed spinel ferrites were synthesized and characterized. The Mg0.5Zn0.5La0.05Fe1.95O4 ferrite showed the best response and recovery time, indicating its potential as a material for LPG sensing.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Review
Materials Science, Multidisciplinary
Rajashree Panda, Mitrabhanu Behera, A. Arun Kumar, Dhananjay Joshi
Summary: Rare earth doped aluminate-based phosphors are preferred over sulfide-based phosphors. The unique luminescence features of lanthanide-based materials are being utilized for multidisciplinary research and inventive applications. The past years have seen an increase in research interest in aluminate-based phosphors, leading to improvements in their long-lasting phosphorescence and phosphorescence efficiencies. Combustion synthesis route is an efficient technique for preparing nano-phosphor due to its simplicity and cost-effectiveness.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Review
Materials Science, Multidisciplinary
Younes Zohrabi
Summary: Water is essential for the survival of living organisms, but industrialization has led to contamination of water sources with heavy metals and harmful pollutants. Magnetic nano ferrites have shown potential in effectively removing heavy metals from water due to their magnetic characteristics, high surface area, surface active sites, chemical stability, and ease of modification. This review explores recent literature on the synthesis and application of magnetic ferrites for removing heavy metals from water, aiming to provide a comprehensive understanding for future research.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Baolin Liu, Chenxin Xie, Guanglei Qian, Lishan Zhou, Chenglei Zhang, Lingzhi Zhu
Summary: In this study, a self-cleaning CuO-PdO-Pd/Ti membrane has been developed for the removal of small-sized pollutants. The membrane exhibited superior removal ability and permeability compared to conventional membranes, and maintained high efficiency even after repeated tests. The CuO-PdO-Pd/Ti membrane also showed excellent removal efficiency when treating real wastewater, indicating its high potential for practical applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Debabrata Panda, Akhilesh Kumar Sahu, Krunal M. Gangawane
Summary: A variety of hierarchical nanoporous silica aerogels were synthesized from well-dispersed silica sols, exhibiting diversified particle distributions and excellent thermal properties. The silica aerogels showed low thermal conductivity and high-temperature resilience. Surface modification and dilution of silica sols further improved the thermal resistance of the aerogels. The resilient skeleton structure developed from tiny particles effectively restricted heat dissipation and maintained the porous network at high temperatures.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Hardy Shuwanto, Hairus Abdullah, Young Ku, Jenni Lie
Summary: In this study, a defective system of V-doped Fe2O3 with Pt as a cocatalyst was used for photoelectrochemical water oxidation. The defects in the VFPt-2.5 photoanode were characterized by XPS and EPR analyses. The SEM and TEM analyses revealed that the electrodeposited V-doped alpha-Fe2O3 had a nanosized morphology with an average diameter of 12 nm and a thickness of 300 nm. Under light irradiation, the VFPt-2.5 photoanode achieved a remarkable onset potential and photocurrent density. The stability test showed that Pt helped overcome the charge recombination caused by surface states.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Reza Gholipur, Hemin Mohammed Ali Khalifa, Khatereh Afrouzeh
Summary: Developing doped cathode materials is crucial for achieving low cost and high-performance energy storage. LiMn1.977(Ce, Cu, Ti, CeCuTi)0.023O4 nanoparticles show unmatched high structural stability, capacity, and safety during charge/discharge cycles. Ti-doped LiMn2O4 cathode calcined at 700 degrees C demonstrates the highest capacity and retention when multi-walled carbon nanotubes are added. The presence of titanium increases the porosity for reversible lithium storage and the dielectric constant.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
T. Amutha, M. Rameshbabu, S. Sasi Florence, G. Ramalingam, S. Muthupandi, K. Prabha
Summary: This research provides an overview of the structural analysis and magnetic characteristics of dilute magnetic semiconductor oxides (DMSOs) based on binary metal oxide nanomaterials with different ferromagnetic or paramagnetic dopants. The coprecipitation method was used to create nanoparticle samples, and the results showed certain ferromagnetic behavior and increased magnetic properties.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Preeti Kumari, Vipul Srivastava, Ramesh Sharma, Hamid Ullah
Summary: In this study, the rare-earth ferrites perovskite RFeO3 (R = Pr, Nd) were investigated for their various properties including structural, electronic, magnetic, optical, thermodynamic, and thermoelectric behavior. The study found that these materials exhibit half-metallic behavior under certain conditions, and their optical and thermoelectric properties were evaluated, making them potential candidates for spintronic devices and UV absorbers.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Shuting Yuan, Tianchi Wang, Tian Feng, Jian Kong
Summary: In this study, Fe/Fe3O4/C hollow electromagnetic wave absorbers were prepared using hollow ceiba fibers as templates. The proposed hollow structure could reflect and scatter electromagnetic waves multiple times, leading to significant energy consumption. The impedance matching of magnetic materials and biochar enabled the joint absorption of magnetic and dielectric losses to absorb electromagnetic waves.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
G. R. Mamatha, B. R. Radha Krushna, J. Malleshappa, S. C. Sharma, Satish Kumar, C. Krithika, Nandini Robin Nadar, Dileep Francis, K. Manjunatha, Sheng Yun Wu, H. Nagabhushana
Summary: Nanostructured SrAl2O4:Tb3+/M (M = Li+, Na+, K+, Ca2+, Bi3+) green nanophosphors were synthesized using an environmentally friendly combustion process and Areca nut as a sustainable fuel source. The introduction of alkali metal co-dopants optimized the luminescent intensity and showed potential for data security applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tomoyuki Tachibana, Akihiro Yabuki
Summary: A one-step thermal-reduction method was used to synthesize copper sulfide films with different compositions and pillar-like structures, through adjusting the sulfur ratio and incorporating excess sulfur during the synthesis process.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Mahdy, I. K. El Zawawi, Manal Mounir Ahmad
Summary: Pure PVA and its nanocomposites with CuO and/or CoFe2O4 films were prepared and characterized. The optical properties of the films can be modulated by controlling the percentage of CuO and/or CoFe2O4. The nanocomposites exhibit good ferromagnetic behavior, making the prepared films potentially useful in antenna system miniaturization and flexible magneto-electronic applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)