Article
Chemistry, Multidisciplinary
Jae Seob Lee, Rakesh Saroha, Jang Hyeok Oh, Chungyeon Cho, Bo Jin, Dong-Won Kang, Jung Sang Cho
Summary: This article reports a synthesis strategy for the fabrication of advanced anodes for stable lithium-ion batteries. The strategy involves the formation of hollow NiO nanospheres via nanoscale Kirkendall diffusion and supporting them over a porous graphitic carbon matrix. The resulting hollow and porous nanofibers exhibit improved lithium-ion storage properties and can accommodate large volume variations.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jun Maruyama, Shohei Maruyama, Yukiyasu Kashiwagi, Mitsuru Watanabe, Tsutomu Shinagawa, Toru Nagaoka, Toshiyuki Tamai, Naoya Ryu, Koichi Matsuo, Mao Ohwada, Koki Chida, Takeharu Yoshii, Hirotomo Nishihara, Fumito Tani, Hiroshi Uyama
Summary: While the functions of carbon materials with precisely controlled nanostructures have been reported, their chiral discriminating abilities have not been explored. In this study, chiral discrimination is achieved using helical carbon materials devoid of chiral attachments, and the mechanisms are confirmed through various experiments.
Article
Chemistry, Physical
Xiashuang Luo, Cehuang Fu, Shuiyun Shen, Liuxuan Luo, Junliang Zhang
Summary: A one-step template-free method is developed to transform N-doped PtCuCo polycrystalline nanospheres to N-doped PtCuCo porous hollow nanospheres. The formation of Kirkendall voids and the subsequent removal of surface oxides lead to the formation of N-doped Pt7Cu hollow nanospheres with ultrathin porous shells. The N-doped Pt7Cu porous hollow nanospheres show greatly enhanced electrocatalytic mass activities for ethanol oxidation and oxygen reduction reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jun Hwan Moon, Moo Young Lee, Bum Chul Park, Yoo Sang Jeon, Seunghyun Kim, Taesoon Kim, Min Jun Ko, Kang Hee Cho, Ki Tae Nam, Young Keun Kim
Summary: The study demonstrates the preparation of 3D hollow nanocoils with shape-regulated transition by utilizing a single sacrificial template and triggering the Kirkendall effect. The surface states of HNCs can be tuned based on the transition metal ions reduced during electrochemical preparation, expanding the application scope of these materials. The fabricated nanocomposite shows improved electrochemical performance compared to pure nanoparticles due to increased active surface area.
Article
Chemistry, Multidisciplinary
Osama Saber, Hicham Mahfoz Kotb, Mostafa Osama, Hassan A. Khater
Summary: In this study, titanium dioxide nanoparticles and nanocomposites were prepared using different techniques to control the morphology from nanoparticles to magnetic nanotubes and hollow nanorods. The magnetic nanotubes and hollow nanorods exhibited better optical and magnetic properties compared with titanium dioxide nanoparticles, and showed high performance in photocatalytic degradation of dyes.
Article
Environmental Sciences
Poonam Kumari, Surojit Pande, Pragati Fageria
Summary: The search for efficient semiconductor catalysts for the degradation of pollutants in contaminated water is an interesting area of research due to growing environmental concerns. Hollow nanomaterials, with their larger surface area, demonstrate significant applications in catalysis. This study introduces a facile hydrothermal synthesis method to produce hollow nanorods of ZnO/ZnS via the Kirkendall effect. The synthesized materials were used for photocatalytic degradation and exhibited higher efficiency compared to bare ZnO, suggesting the potential of hollow nanomaterials in varied catalytic reactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Yuan Gao, De-Rui Kong, Zhu-Yan Zhang, Xian-Fa Zhang, Zhao-Peng Deng, Li-Hua Huo, Shan Gao
Summary: Spinel CoMn2O4 hollow nanospheres were successfully prepared using PVP as a structure directing agent, and applied as an H2O2 sensor with excellent sensing performance and recovery rate, showing potential application in environmental and biological fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Amaya Gil-Barbarin, Jose Ignacio Gutierrez-Ortiz, Ruben Lopez-Fonseca, Beatriz de Rivas
Summary: Structured Co3O4 catalysts with a hollow nanotube morphology were prepared using synthesis routes based on the Kirkendall effect. The resulting samples were thoroughly characterized and the performance of the catalysts was found to be influenced by the presence of active oxygen species on the surface and the adsorption capacity for chlorocarbon. Both pollutants were efficiently converted to deep oxidation products at relatively low temperatures and the optimal catalyst showed appreciable stability during 120 hours of continuous operation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Zhenzhe Li, Shuhao Xiao, Yan Wang, Zhaozhao Zhu, Xinyan Li, Xiaobin Niu, Qingquan Kong, Jinxia Jiang, Jun Song Chen
Summary: In this study, uniform MnO double-shell hollow nanospheres were successfully synthesized using a self-templating method. The as-prepared MnO exhibited good cyclic stability and rate performance for sodium storage. The sodium storage process of MnO was mainly governed by insertion/deinsertion reactions, with only a little conversion between Mn and Na2O taking place. The hollow construction of the nanospheres contributed to improved structural integrity and enhanced long-term cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Ki Cheon Nam, Young Hoe Seon, Parthasarathi Bandyopadhyay, Jung Sang Cho, Sang Mun Jeong
Summary: In this study, porous nanofibers composed of Fe@ZIF-67-derived dual-phase Co3O4/Fe3O4 hollow nanospheres and N-doped graphitic C (N-GC) were prepared as high-performance lithium-ion battery anodes. The optimized ZIFs containing both Co and Fe ion nodes were achieved by adding additional Fe salt in the precursor solution of ZIF-67. The obtained nanostructure exhibited a high discharge capacity and showed potential for applications in energy storage systems.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Bo Shen, Liliang Huang, Xiaobing Hu, Jiahong Shen, Peichen Zhong, Cindy Y. Zheng, Chris Wolverton, Chad A. Mirkin
Summary: In this study, hollow metal chalcogenide nanoparticles with large compositional and morphological diversity were synthesized by combining scanning probe block copolymer lithography with a Kirkendall effect-based sulfidation process. The influence of temperature-dependent diffusion kinetics, elemental composition and miscibility, and phase boundaries on the resulting particle morphologies was investigated.
Article
Materials Science, Ceramics
Yi Liu, Chuangye Wang, Wei Luo, Liang Bai, Yang Xu, Xiaodong Hao, Jianfeng Zhu, Shouwu Guo
Summary: Hollow Ti3AlC2 microrods were prepared for the first time using short carbon fibers as sacrificial templates in NaCl/KCl molten salts. The formation of the hollow structure was primarily attributed to the Kirkendall effect. Additionally, other hollow carbide powders were successfully fabricated using this method.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hanbin Hu, Xueying Jia, Jiaxin Wang, Wei Chen, Lei He, Yu-Fei Song
Summary: The newly designed hollow SiO2-PMo12@rGO nanosphere with high energy density showed excellent performance in lithium-ion batteries by utilizing the hollow structure to buffer volume changes.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Yuhua Zheng, Jing Zhou, Xi Zeng, Dandan Hu, Fang Wang, Yanbin Cui
Summary: A series of well-dispersed CeMnOx hollow nanospheres with uniform diameter and thickness were synthesized by combining the template method and interfacial reaction. Among all the prepared catalysts, CeMnOx-3 exhibited the lowest temperature for complete combustion of toluene, high stability for 36 h, and good water tolerance. The reaction between Ce and Mn in the Ce-Mn binary oxides resulted in increased Ce3+ and oxygen vacancies, leading to improved catalytic performance.
Article
Chemistry, Physical
Ya Wang, Jinyu Bo, Zhexi Chi, Lihua Wang, Jian Li
Summary: The nitrogen-doped hollow carbon nanospheres (NHCSs) were selectively dissolved by acetone to synthesize and interconnected with carbon nanotubes (CNTs) to prepare the CNTs-NHCSs composite as an advanced anode for potassium ion batteries. The combination of NHCSs and CNTs enhances electron transport and buffers volume changes, resulting in high reversible capacity and excellent rate capability for potassium storage. The successful construction of the CNTs-NHCSs composite suggests a new direction for structural design and function optimization of PIBs electrode materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Applied
R. Nakamura, A. Matsumoto, M. Ishimaru
Summary: Crystallization of substrate-free amorphous germanium films was induced by electron irradiation at energies below 20 keV, resulting in explosive crystallization at 2-20 keV. This process requires a threshold electron flux five to six orders of magnitude lower than previously reported at 100 keV, making it advantageous for producing polycrystalline Ge films.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Ceramics
Manabu Ishimaru, Ryusuke Nakamura, Yanwen Zhang, William J. Weber, George G. Peterson, Natale J. Ianno, Michael Nastasi
Summary: In this study, the structures of amorphous boron carbide (a-BxC) were characterized using electron diffraction technology. It was found that the most favorable cluster in B4C generated by ion irradiation is a pentagonal pyramid, while C-C homonuclear bonds were formed in the deposited a-BxC thin film. X-ray photoemission spectroscopy revealed that the a-BxC thin film contains more carbon than B4C, leading to the formation of the homonuclear bonds.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Architecture
Renata Castelo-Branco, Ines Caetano, Antoenio Leitao
Summary: This paper systematically analyzes the suitability of algorithmic design as a contemporary representation method for architectural design, exploring its origins, characteristics, influence of technological development and education, and its comparison to other digital architectural representation methods.
FRONTIERS OF ARCHITECTURAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Julia de O. Primo, Dienifer F. Horsth, Jamille de S. Correa, Arkaprava Das, Carla Bittencourt, Polona Umek, Ana Guilherme Buzanich, Martin Radtke, Kirill Yusenko, Cristina Zanette, Fauze J. Anaissi
Summary: This study synthesized Ag/ZnO nanoparticles using two green synthesis routes, with cassava starch as a fuel and Aloe vera as a reducing and stabilizing agent. The nanoparticles showed high efficiency in disinfecting lake water contaminated with bacteria, especially Escherichia coli (E. coli). The results indicate that Ag/ZnO nanoparticles are a promising candidate for treating bacterially contaminated wastewaters due to their ease of preparation, low cost, and disinfection efficiency.
Article
Architecture
Sara Garcia, Antonio Leitao
Summary: Generative design systems can generate various solutions, but designers often need guidance in the search process to avoid inefficiency and overlook interesting solutions. This paper presents a tool called Navigator that integrates a set of white-box mechanisms to automate the generation of default, random, similar, and hybrid designs and design subspaces, as well as support the generation of design collections. Test results show that providing understandable mechanisms for navigating design spaces can increase designer engagement in the search process.
INTERNATIONAL JOURNAL OF ARCHITECTURAL COMPUTING
(2022)
Article
Chemistry, Multidisciplinary
Dienifer F. L. Horsth, Julia de O. Primo, Nayara Balaba, Jamille S. Correa, Cristina M. Zanette, Douglas K. Silva, Carla Bittencourt, Fauze J. Anaissi
Summary: This study reports the synthesis of boehmite aluminum oxide hydroxide particles from the recycling of metallic can seals, with the addition of silver nanoparticles reduced by Aloe Vera extract, showing high efficiency in water treatment. The ability to reuse the sample multiple times demonstrates the potential for sustainable circular economy practices.
Article
Materials Science, Ceramics
Takumi Hamaguchi, Ryusuke Nakamura, Kohta Asano, Takeshi Wada, Takeyuki Suzuki
Summary: A thin-film diffusion couple consisting of amorphous iron-boron (a-FeB) alloys with different ratios of stable isotopes of B was prepared using a sputtering technique, and the interdiffusion profiles were obtained by secondary-ion mass spectrometry to evaluate the diffusion coefficient of B in a-FeB at temperatures ranging from 533 K to 653 K. The activation energy and pre-exponential factor for diffusion were determined to be 1.51 eV and 3.0 x 10-8 m2 s-1, respectively. Comparison with reported data showed that boron is the fastest diffusing element in a-FeB, and the activation energy for B diffusion is similar to that for the crystallization of iron in alpha-FeB, suggesting that B diffusion is the rate-determining process.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Biochemistry & Molecular Biology
Nayara Balaba, Silvia Jaerger, Dienifer F. L. Horsth, Julia de O. Primo, Jamille de S. Correa, Carla Bittencourt, Cristina M. Zanette, Fauze J. Anaissi
Summary: This study reported the synthesis of structured MgO using feedstock starch, citrus pectin, and Aloe vera leaf, which are abundant, low-cost, and non-toxic green fuels. The formed oxides exhibited high porosity and were evaluated for their antimicrobial activity. Characterization techniques such as EDXRF, XRD, FTIR, and SEM were used to analyze the samples. The results showed that the sample morphology depended on the organic fuel used during the synthesis. The MgO-St, MgO-CP, and MgO-Av oxides showed effective antimicrobial activity against Staphylococcus aureus and Escherichia coli, as well as antifungal activity against Candida albicans.
Article
Chemistry, Physical
Nayara Balaba, Dienifer F. L. Horsth, Jamille de S. Correa, Julia de O. Primo, Silvia Jaerger, Helton J. Alves, Carla Bittencourt, Fauze J. Anaissi
Summary: Three synthesis routes using different natural polysaccharides as fuels and complexing agents were described for obtaining MgO. XRD identified the formation of a monophasic periclase structure for the three samples. BET analysis showed a significant difference in textural properties, with the highest pore volume and surface area obtained for MgO-St. The synthesized magnesium oxides displayed the ability to reduce the amount of Cu2+ ions in wastewater.
Article
Chemistry, Multidisciplinary
Julia de O. Primo, Jamille de S. Correa, Dienifer F. L. Horsth, Arkaprava Das, Marcin Zajac, Polona Umek, Ruddy Wattiez, Fauze J. Anaissi, Rob C. A. Onderwater, Carla Bittencourt
Summary: This study reports on the antiviral activity of coatings containing ZnO particles obtained using Aloe vera or cassava starch as reaction fuel. The ZnO-aloe/coating displays the highest antiviral activity against SARS-CoV-2, inactivating >99% of the virus after 24 hours of contact.
Article
Physics, Applied
R. Nakamura, M. Miyamoto, M. Ishimaru
Summary: In this study, thin films of amorphous Ge100-xSnx (x = 8, 11, and 19 at. %) were irradiated with a low-energy electron beam, resulting in instantaneous wide-area crystallization. The characteristic spiral crystal growth associated with explosive crystallization occurred, and solid solutions of GeSn with up to 19 at. % Sn concentration were obtained. The size of the explosive crystallization region decreased with increasing Sn content, and thermal analyses showed a decrease in heat released during crystallization with increasing Sn content, indicating the importance of heat release in the propagation of explosive crystallization in a-GeSn.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Daisuke Inoue, Ryusuke Nakamura, Hiroshi Numakura
Summary: Diffusion in Ni-V solid-solution of A1 structure and Ni3V of D0(22) structure was investigated through interdiffusion experiments using single-phase and two-phase diffusion couples. Concentration profiles were measured and the diffusion coefficient was evaluated. The diffusion coefficient in the A1 phase agrees with literature data, while the diffusion coefficient in the D0(22) phase is smaller than expected. The faster diffusion reported in the D0(22) phase by previous studies could be attributed to microstructural evolution during their experiments.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2023)
Article
Chemistry, Physical
Julia de Oliveira Primo, Dienifer F. L. Horsth, Nayara Balaba, Polona Umek, Fauze J. Anaissi, Carla Bittencourt
Summary: This study reports on the synthesis of blue pigments of ZnAl2O4:M (M = Co2+ and Co2+/Nd3+) using recycled metallic aluminum and their reflective properties of Near-infrared radiation. The pigments were characterized and the wettability of coatings containing the pigments was evaluated. The prepared compounds show high near-infrared solar reflectance and have the potential to be energy-saving color pigments for coatings.
Article
Chemistry, Analytical
Selene Acosta, Juan Casanova-Chafer, Eduard Llobet, Axel Hemberg, Mildred Quintana, Carla Bittencourt
Summary: The properties of carbon nanotubes can be modified by adding metal nanoparticles to their surface. This is achieved by first functionalizing the CNTs with oxygen groups using plasma, followed by decorating them with Ni-Pd bimetallic nanoparticles using plasma sputtering deposition. The oxygen groups act as nucleation sites for the growth of the bimetallic nanoparticles. The resulting Ni-Pd nanoparticle-decorated CNTs are then evaluated for their sensing capabilities in detecting toluene.
Proceedings Paper
Computer Science, Hardware & Architecture
Renata Castelo-Branco, Antonio Leitao
Summary: Algorithmic Design enables the creation of form through algorithms, reducing project costs and environmental impact. However, the mismatch between the representation methods used and architectural practice, along with inadequate programming environments, discourages architects from adopting Algorithmic Design. To address this issue, coupling Algorithmic Design with appropriate representation methods for complex architectural projects is proposed.
COMPUTER-AIDED ARCHITECTURAL DESIGN: DESIGN IMPERATIVES: THE FUTURE IS NOW
(2022)