Article
Engineering, Electrical & Electronic
Yaman Afandi, Gia Parish, Adrian Keating
Summary: Introducing notches at the four corners of the top mirror minimizes bowing of the top mirror significantly.
Lattice mismatch at the PS/silicon interface is likely the key factor controlling the stress in multilayer PS thin films.
Micromachining techniques can be tuned to reduce stress mismatch and absorption loss in the LWIR range.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
Yidan Zhong, Tao Wang, Ming Yan, Xingyu Huang, Xiaofan Zhou
Summary: This paper proposes a novel one-step hot pressing molding method to prepare polyacrylonitrile (PAN) carbon fibers, eliminating the time-consuming and energy-consuming thermal stabilization stage. Hot pressing enforces fiber structure cyclization and reduces fiber damage by mitigating the escape of heteroatoms gas. The hot pressing molding not only improves density and repairs cracks, but also simplifies the process, saves energy and time, and reduces cost.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Characterization & Testing
R. Muthuraj, M. Hajee, A. R. Horrocks, B. K. Kandola
Summary: Reactive compatibilization using MA and GMA can enhance the compatibility between TcC and PA1010, with MA being more effective but leading to slightly inferior properties of the carbon fibers. Accurate control of stress during thermostabilization and carbonization stages is crucial for optimizing the properties of the compatibilized carbon fibers.
Article
Engineering, Electrical & Electronic
Claudio Porzi, Manuel Reza, Paolo Ghelfi, Marc Sorel, Antonella Bogoni
Summary: We report a silicon photonics flat-top bandpass microwave photonic filter with large out-of-band power rejection of over 40 dB and tunability of central frequency up to 70 GHz. The RF bandpass transfer function can be widely configured without sacrificing filter performance. The filter integrates a phase modulator and a tunable optical splitter to achieve a high level of functional integration.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Xue Han, Sihai Yang
Summary: Since its first industrial production in the 1890s, acetylene has been crucial in manufacturing various materials. With the development of functional porous materials, such as metal-organic frameworks and decorated zeolites, there is a growing interest in developing new technologies to improve the safety, energy efficiency, and carbon footprint of acetylene processes. This Minireview explores the applications of these advanced porous materials in acetylene purification and storage, discusses the challenges in developing solid sorbent-based separation technologies, and identifies areas for future research efforts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
T. Kreuger, W. P. M. van Swaaij, S. R. A. Kersten
Summary: The deposition of carbon from methane pyrolysis on various porous media was investigated at high temperatures. Different types of unfunctionalized carriers were used with varying pore sizes. Carbon deposition over time was measured and it was found that the porous samples can display both an induction period and a gradual stop in carbon deposition. The substrate material and initial pore diameter were found to affect the rate and extent of carbon deposition.
Article
Engineering, Chemical
Isabela L. R. Cintra, Mauricio R. Baldan, Erick G. R. Anjos, Thais F. Silva, Lilia M. Guerrini, Mirabel C. Rezende, Edson C. Botelho
Summary: Blankets based on blends of PAN/lignin were processed via electrospinning and then thermally treated to produce carbon nanofiber samples. The best stabilization and carbonization parameters were determined through analysis techniques such as DSC, TGA, SEM, and FT-IR. The results showed the feasibility of producing carbon blankets but with low carbon yield and a decrease in fiber diameter. Characterization of the carbonized blankets included electrical conductivity, chemical structure, crystallographic ordering, and morphology analysis.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Dajian Liu, Long Zhang, Ying Tan, Daoxin Dai
Summary: A silicon photonic filter with an ultra-large free spectral range was proposed and demonstrated using high-order adiabatic elliptical-microrings and bent directional couplers. The filters based on different orders of AEMs achieved a box-like spectral response with an FSR of about 37 nm. An eight-channel silicon photonic filter with a channel-spacing of around 3.2 nm and high extinction ratios of >30 dB was also demonstrated in the study.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Lin Yang, Daihong Huh, Rui Ning, Vi Rapp, Yuqiang Zeng, Yunzhi Liu, Sucheol Ju, Yi Tao, Yue Jiang, Jihyun Beak, Juyoung Leem, Sumanjeet Kaur, Heon Lee, Xiaolin Zheng, Ravi S. Prasher
Summary: Silicon nanowires show potential in improving thermoelectric conversion efficiency at high temperatures. Researchers achieved high-performance thermoelectrics with improved ZT values by optimizing the synthesis method and enhancing the testing platform.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Pengfei Zheng, Xuemeng Xu, Guohua Hu, Ruohu Zhang, Binfeng Yun, Yiping Cui
Summary: A reconfigurable multi-functional optical filter based on a self-coupled microring assisted MZI structure is proposed, which can be switched into five different devices by controlling thermal-optical phase shifters. The performance of this filter is comparable to individual devices and has potential applications in integrated optical signal processing and microwave photonics systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Yinghua Qiu, Yunpeng Wang
Summary: A simple strategy for synthesizing porous Co3O4 nanostructures through a hydrothermal process was introduced. The Co3O4 nanorods obtained demonstrated porous structural features and showed excellent gas sensing properties with high response and short response and recovery time to ethanol, as well as anti-interference ability towards other gases.
CERAMICS INTERNATIONAL
(2022)
Review
Engineering, Environmental
Minghui Yu, Zhaoyang Zhu, He-Ping Li, Qi-Long Yan
Summary: Aluminum hydride (AlH3) is a novel energetic material with high hydrogen storage capacity and rapid dehydrogenation at low temperatures, showing promising applications in solid propellants and other areas. Stabilization of AlH3 is crucial for its use in solid propellants, as it can improve rocket engine performance and reduce mechanical wear. Future research directions may focus on comparing and improving different stabilization strategies.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Atanu Dey, Nijhuma Kayal, Omprakash Chakrabarti, Nilo M. Fortes, Murilo D. M. Innocentini, Atiar R. Molla, Prasanta Sinha, Srikanta Dalui
Summary: In this study, oxide-bonded porous SiC ceramic filter supports were prepared and their material properties and structure characteristics were investigated. Materials processed by the mullite bonding technique exhibited higher strength and elastic modulus at a similar porosity level. Spray coating method was applied for preparation of oxidation-bonded SiC filtration layer on the porous SiC support compacts.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Correction
Optics
Mustafa Hammood, Ajay Mistry, Han Yun, Minglei Ma, Stephen Lin, Lukas Chrostowski, Nicolas A. F. Jaeger
Summary: This publisher's note contains corrections to Opt. Lett. 46, 2738 (2021). (C) 2021 Optical Society of America.
Article
Optics
Chunlei Sun, Yuexin Yin, Zequn Chen, Yuting Ye, Ye Luo, Hui Ma, Lichun Wang, Maoliang Wei, Jialing Jian, Renjie Tang, Hao Dai, Jianghong Wu, Junying Li, Daming Zhang, Hongtao Lin, Lan Li
Summary: In this paper, we propose an exact and robust design method for manufacturing add-drop filters (ADFs) with FSR-free operation capability, sub-nanometer optical bandwidth, and high out-of-band rejection ratio. The achieved ADF has a narrow bandwidth, large out-of-band rejection, and high fabrication tolerance, and maintains the FSR-free feature during the tuning process.
Article
Nanoscience & Nanotechnology
Raul J. Martin-Palma
Article
Energy & Fuels
Rehab Ramadan, Raul J. Martin-Palma
Article
Materials Science, Multidisciplinary
Rehab Ramadan, Vicente Torres-Costa, Raul J. Martin-Palma
Article
Materials Science, Multidisciplinary
M. Martinez-Calderon, R. J. Martin-Palma, A. Rodriguez, M. Gomez-Aranzadi, J. P. Garcia-Ruiz, S. M. Olaizola, M. Manso-Silvan
PHYSICAL REVIEW MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Nerith Rocio Elejalde-Cadena, Jose Octavio Estevez, Vicente Torres-Costa, Maria Dolores Ynsa-Alcala, Gaston Garcia-Lopez, Abel Moreno
Summary: By conducting molecular analysis of dinosaur eggshells using various techniques, it was determined that calcite is the main mineral present, along with identification of quartz and albite crystallographic planes, as well as nine amino acids and secondary structure components. This study contributes significantly to the field of paleontological research in understanding extinct species millions of years ago.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Materials Science, Ceramics
R. Jemai, M. A. Wederni, O. Amorri, W. Hzez, R. J. Martin-Palma, K. Khirouni, S. Alaya
Summary: The use of nickel-yttria-stabilized zirconia (Ni/YSZ) as anode material for solid oxide fuel cell (SOFC) applications presents limitations, and this study aims to improve the conductivity of lanthanum chromite (LaCrO3) by copper doping. The results show that the substitution of chrome with copper slightly increases the lattice parameter while reducing the band gap energy and increasing crystallite size. The electrical measurements indicate an improved conductivity with copper content, transitioning from a semiconductor to a metallic behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Rehab Ramadan, Raul J. Martin-Palma
Summary: This study investigates the incorporation of silver nanoparticles into nanostructured porous silicon layers to enhance the optoelectronic performance of Si-based devices. The experimental results show a significant improvement in electrical conduction and photoresponse after the addition of metallic nanoparticles.
Editorial Material
Chemistry, Multidisciplinary
Vicente Torres-Costa
Review
Energy & Fuels
Rehab Ramadan, Raul J. Martin-Palma
Summary: Nanostructured materials improve the overall properties of thermoelectric devices by increasing the surface-to-volume ratio. Nanostructured Si is used to expand power generation but reduces electrical conductivity. Hybrid nanostructures based on nanostructured Si and other materials offer a strategy to lower thermal conductivity while maintaining good electrical conduction properties.
Article
Chemistry, Physical
Ruth Pulido, Nelson Naveas, Raul J. Martin-Palma, Fernando Agullo-Rueda, Victor R. Ferro, Jacobo Hernandez-Montelongo, Gonzalo Recio-Sanchez, Ivan Brito, Miguel Manso-Silvan
Summary: In this study, the crystal structure and vibrational properties of layered monoclinic Li2MnO3 were investigated using first-principles calculations. The results were compared with experimental data, revealing the structural and vibrational characteristics of Li2MnO3 and providing a basis for further physicochemical characterization research.
Article
Biochemistry & Molecular Biology
Nelson Naveas, Ruth Pulido, Vicente Torres-Costa, Fernando Agullo-Rueda, Mauricio Santibanez, Francisco Malano, Gonzalo Recio-Sanchez, Karla A. Garrido-Miranda, Miguel Manso-Silvan, Jacobo Hernandez-Montelongo
Summary: This study proposes the formation of antibacterial films with silver nanoparticles embedded in carboxymethylcellulose/chitosan multilayers by the layer-by-layer method. The films exhibited high antibacterial activity against both Escherichia coli and Staphylococcus aureus, indicating their potential for biomedical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Ruth Pulido, Nelson Naveas, Teofilo Graber, Raul J. Martin-Palma, Fernando Agullo-Rueda, Ivan Brito, Carlos Morales, Leonardo Soriano, Laura Pascual, Carlo Marini, Jacobo Hernandez-Montelongo, Miguel Manso Silvan
Summary: This study investigated the formation of LMO nanocomposites by hydrothermal synthesis and found that the crystallization temperature plays a role in determining the composition of the materials. The high lithium content layered monoclinic phase showed potential as an effective lithium adsorbent material for lithium recovery from aqueous resources.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
O. de Melo, F. Agullo-Rueda, V Torres-Costa
Summary: MoO2 thin films were subjected to a laser localized oxidation process to obtain different MoOx phases, including spatially resolved regions of MoO2, alpha-MoO3, beta-MoO3, amorphous a-MoO3, and Mo4O11. Phase separation was found to be driven by a sublimation/deposition process and solid state reaction, and electrical measurements showed a transformation from metal-like to semiconducting Mo oxide phases, potentially for the development of laser written all-oxide electronic circuits.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Rehab Ramadan, Vicente Torres-Costa, Raul J. Martin-Palma
Summary: Three different configurations of hybrid organic-inorganic self-powered photodetectors were fabricated and characterized. The addition of a nanostructured porous silicon layer improved photoresponse under high irradiation levels. The use of Si + PSi micro-arrays instead of single PSi layers resulted in devices with significantly improved performance and broadband spectral responsivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
