Article
Crystallography
Aleksandra Chumakova, Felizitas Kirner, Andrei Chumakov, Stephan V. Roth, Alexei Bosak, Elena V. Sturm, Carlos Rodriguez-Navarro
Summary: This study investigates the structure of a faceted mesocrystal composed of polystyrene-functionalized single crystalline gold nanoparticles using ultrasmall-angle X-ray scattering (USAXS) and wide-angle X-ray scattering (WAXS) techniques combined with electron microscopy. The analysis of the data provides insights into the microscopic structure and structuration principle of mesocrystals.
Article
Materials Science, Multidisciplinary
Ravinder Kumar Chadha, Kanchan L. Singh, Chetan Sharma, Anirudh P. Singh, Vandana Naithani
Summary: Different compositions of 70Sr-HA.xZn (30-x)Si composites were prepared by conventional sintering and microwave sintering, characterized by XRD, FTIR, Raman, SEM, and hardness tests. Microwave sintered samples showed higher density, hardness, as well as more uniform and higher grain growth compared to conventionally sintered samples.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jingyao Li, Yaguang Zhu, Han Yu, Bin Dai, Young-Shin Jun, Fuzhong Zhang
Summary: Researchers have developed a new strategy for synthesizing amyloid proteins by fusing amyloid peptides with flexible linkers from spider silk proteins, resulting in fibers with strong mechanical properties. These fibers can be utilized for a variety of mechanically demanding applications, surpassing most recombinant protein fibers and even some natural spider silk fibers in terms of ultimate tensile strength and toughness.
Article
Chemistry, Multidisciplinary
Michal Swierczewski, Fabrice Cousin, Ewa Banach, Arnulf Rosspeintner, Latevi Max Lawson Daku, Abolfazl Ziarati, Rania Kazan, Gunnar Jeschke, Raymond Azoulay, Lay-Theng Lee, Thomas Buergi
Summary: A bidentate chiral dithiol (diBINAS) is used to connect Au-25 nanoclusters into oligomers. The stable fractions obtained through size separation are analyzed by various techniques to determine their structure and optical properties. The diBINAS molecule can be considered as a templating molecule for the directed self-assembly of metal clusters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Adrian Rodriguez-Palomo, Viviane Lutz-Bueno, Xiaobao Cao, Roland Kadar, Martin Andersson, Marianne Liebi
Summary: The study shows that in regions with high extensional flow, the material is oriented perpendicular to the flow, while in regions with high enough shear rate, the material is oriented in the flow direction. A flow-induced morphological transition from aligned lamellae toward multilamellar vesicles is observed in the lamellar phase with different shear rates.
Article
Engineering, Civil
Kunal Bisht, P. V. Ramana
Summary: This study investigates the use of waste glass in concrete mixes to achieve optimal performance. The results show that waste glass with lower water absorption can reduce drying shrinkage and increase the apparent density of the concrete. Additionally, when waste glass is incorporated up to 21%, the compressive strength of the concrete increases up to 400°C due to reduced pore pressure caused by low water absorption.
Article
Optics
Jean Y. Tovar-Sanchez, M. B. de la Mora, Tupak Garcia-Fernandez, Miguel A. Valverde-Alva, Citlali Sanchez-Ake, Rene Garcia-Contreras, Rosalba Castaneda-Guzman, Mayo Villagran-Muniz
Summary: Polymer-gold nanoparticle nanocomposites based on POSS polymer with a thiol group were obtained by laser ablation in liquids. The nanocomposites showed spherical geometry of the Au NPs mainly smaller than 60 nm, with typical absorbance spectra for spherical Au NPs in the visible range. The nanocomposites exhibited an improvement in colloid stability, absorbance peak, and reproducibility compared to NPs without POSS-thiol.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ting Peng, Ke Wang, Shihui He, Xun Chen, Wenxin Dai, Xianzhi Fu
Summary: This study demonstrates the conversion of CO2 into C-1-C-2 over a Pd/Mn-TiO2 catalyst, with the presence of UV light favoring the formation of C-2 (alcohol) products. Synergistic effects between Pd-Mn and TiO2 play a crucial role in catalyzing the reaction.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zaka Ullah, Javed Rehman, Faheem Ur Rehman, Shagufta Gulbadan, Muhammad Adil Mahmood, Muhammad Azhar Khan
Summary: Perovskite type Ba1-xSrxZr0.2Ti0.8O3 ceramics were synthesized using a conventional solid-state reaction method, and their structure and properties were characterized. The results showed that the Ba1-xSrxTi0.8Zr0.2O3 composition does not transform from normal ferroelectric to relaxor ferroelectric in the current range. Diffusivity increases with increasing Sr concentration, while the transition temperature decreases.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Patrick C. Huston, Devon L. Drey, William F. Cureton, J. Matthew Kurley, Jake W. Mcmurray, S. Michelle Everett, Changyong Park, Maik Lang
Summary: Zirconium carbide microspheres with grain size of 40-320 nm were synthesized using internal gelation techniques, showing a more homogeneous internal microstructure. However, excess carbon was present in the microspheres, forming localized nano-sized domains of graphite-like carbon material.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Applied
Zuzana Sirillova, Janka Hradilova, Michal Pech, Silvie Svarcova, Petr Bezdicka, Vilem Nedela, David Hradil
Summary: In order to study the use of gold nanoparticles in miniature painting, seven 19th century portraits were examined, and the presence of Purple of Cassius pigment was confirmed in four paintings. The particles were characterized using X-ray powder diffraction and environmental scanning electron microscopy, with an average size of 8-14 nm. Replication of the pigment preparation in the laboratory yielded a similar pigment, providing new insights into the use of Purple of Cassius in portrait miniatures.
Article
Chemistry, Physical
Bing-Jian Su, Kuan-Wen Wang, Chung-Jen Tseng, Kueih-Tzu Lu, Chih-Wen Pao, Jyh-Fu Lee, Hwo-Shuenn Sheu, Kuang-Hsu Wu, Jenh-Yih Juang, Jin-Ming Chen
Summary: Pt3Sn and Pt nanoparticles dispersed on graphene exhibit better performance in ethanol oxidation reaction, improving the efficiency of ethanol oxidation.
Article
Chemistry, Multidisciplinary
Camino Martin-Sanchez, Ana Sanchez-Iglesias, Jose Antonio Barreda-Argueso, Alain Polian, Luis M. Liz-Marzan, Fernando Rodriguez
Summary: The mechanical properties and stability of metal nanoparticle colloids under high-pressure conditions are investigated using optical extinction spectroscopy and small-angle X-ray scattering (SAXS). SAXS allows in situ monitoring of the structural evolution of nanoparticles induced by pressure, including nanoparticle size, shape, and aggregation. The differences in behavior observed under hydrostatic and nonhydrostatic conditions are explained in terms of liquid solidification processes leading to nanoparticle aggregation. The impact of nanoparticle shape on the aggregation process is also discussed.
Review
Chemistry, Multidisciplinary
Jayesh Sonje, Seema Thakral, Susan Krueger, Raj Suryanarayanan
Summary: This review summarizes the applications of differential scanning calorimetry (DSC) and scattering techniques in protein formulation design and characterization. Scattering techniques include wide angle X-ray diffractometry (XRD), small-angle neutron scattering (SANS) and small-angle X-ray scattering (SAXS). While DSC is valuable for understanding thermal behavior of the excipients, XRD provides critical information about physical state of solutes during freezing, annealing and in the final lyophile. However, complementary techniques like small-angle scattering are needed to detect biomolecule-related transitions.
PHARMACEUTICAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Luna Liang, Yun-Yan Wang, Samarthya Bhagia, Vaidyanathan Sethuraman, Zhi Yang, Xianzhi Meng, Nathan Bryant, Loukas Petridis, Jeremy C. Smith, Sai Venkatesh Pingali, Nidia C. Gallego, Yunqiao Pu, Barbara R. Evans, Hugh M. O'Neil, Brian H. Davison, Arthur J. Ragauskas
Summary: The study revealed significant structural changes in solubilized lignin isolated from wild-type and transgenic switchgrass after different organosolv pretreatments, with ethanol pretreatment causing the most pronounced reduction in lignin molecular mass. THF-pretreated transgenic lignins showed higher molecular mass, more fi-O-4 linkages, and aliphatic hydroxyl content compared to ethanol and GVL pretreated lignin.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Inorganic & Nuclear
Chisayo Nakayama, Masafumi Harada, Masayasu Iida
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2017)
Article
Engineering, Chemical
Cong Cong, Sayaka Nakayama, Shinya Maenosono, Masafumi Harada
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2018)
Article
Chemistry, Physical
Yunlv Cheng, Xinshu Zhao, Yulv Yu, Lifang Chen, Tao Cheng, Jin Huang, Yan Liu, Masafumi Harada, Akimitsu Ishihara, Yuan Wang
JOURNAL OF POWER SOURCES
(2020)
Article
Chemistry, Physical
Masafumi Harada, Miho Yamamoto, Maharu Sakata
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Chemistry, Multidisciplinary
Masafumi Harada, Miho Yamamoto, Hiroki Iwase
Summary: The study used SANS and SAXS techniques to investigate the formation process of silver nanoparticles in water-in-oil reverse microemulsions, revealing structural changes before and after the formation of Ag NPs. Results showed that Ag NPs primarily form aggregates through the aggregation of water droplets and particle-particle attractive interactions.
Article
Chemistry, Physical
Masafumi Harada, Fukue Kotegawa, Masako Kuwa
Summary: A comparison of cobalt-based oxides with spinel structure was conducted to investigate their electrochemical and physicochemical behavior on the oxygen evolution reaction (OER) in an alkaline solution. The results show that the active sites are controlled by the cation distribution and bond strength at the catalyst surface. This study provides important insights into the effects of cation distributions on catalytic activity and presents a method for determining the fundamental mechanism of cobalt oxides for OER.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yuta Yamagiwa, Masafumi Harada, Hiroshi Yao
Summary: Semiconducting transition metal oxide-based nano-architectures with chirality have attracted significant attention due to their tunability and versatile optical/chiroptical properties. In this study, chiroptically active cobalt oxide/hydroxide nanoparticles were synthesized using a solvothermal approach. The crystalline phases and optical/chiroptical properties of the nanoparticles were found to depend on the concentration of chiral proline used in synthesis. The addition of proline resulted in a phase change and increased chiroptical response, with the maximum anisotropy factor observed in the visible light region.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Mari Takahashi, Yuki Kitazaki, Hiromi Oshima, Masafumi Harada, Shinya Maenosono
Summary: In this study, films made of nanoparticles with different crystal structures were used for investigation and comparison of their electrochromic behavior. The results show that the color deterioration mechanisms are different for films with different crystal structures. The m-Film undergoes local structural distortion leading to color deterioration, while the h-Film is explained by the trapping of Li+ in the optically inactive trigonal cavities.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yulv Yu, Yichen Cai, Minghui Liang, Xin Tan, Jin Huang, Fukue Kotegawa, Zezhou Li, Jihan Zhou, Hong Jiang, Masafumi Harada, Yuan Wang
Summary: This study prepared Ru-co-Pt catalysts for the first time, which can efficiently catalyze the conversion of CO2 to multicarbon compounds at low temperatures with a selectivity of 90.1%, offering a new strategy for developing advanced compounds.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Masafumi Harada, Masako Kuwa, Ryota Sato, Toshiharu Teranishi, Mari Takahashi, Shinya Maenosono
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Physical
Lifang Chen, Yulv Yu, Masako Kuwa, Tao Cheng, Yan Liu, Hiroshi Murakami, Masafumi Harada, Yuan Wang
ACTA PHYSICO-CHIMICA SINICA
(2020)
Article
Nanoscience & Nanotechnology
Masako Kuwa, Masafumi Harada, Ryota Sato, Toshiharu Teranishi
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Masafumi Harada, Risa Ikegami, Loku Singgappulige Rosantha Kumara, Shinji Kohara, Osami Sakata
Article
Chemistry, Inorganic & Nuclear
Takayuki Nakajima, Kanako Nakamae, Rika Hatano, Kaho Imai, Masafumi Harada, Yasuyuki Ura, Tomoaki Tanase
DALTON TRANSACTIONS
(2019)
Article
Chemistry, Physical
Hua Er, Haruka Yasuda, Masafumi Harada, Eiji Taguchi, Masayasu Iida
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2017)