Article
Chemistry, Inorganic & Nuclear
Fujun Yao, Xun Liu, Chaoqun Wu, Xin Yang, Yan Wang, Wenyuan Hu, Chonghua Pei
Summary: This study investigates the biomimetic potential of using amorphous CaCO3 (ACC) to mimic crustacean exoskeletons and optimize their physical and chemical properties. The researchers prepared monodisperse ACC microspheres with high sphericity and hardness using the gas diffusion method in the presence of Mg2+. The stability of ACC was found to be affected by environmental conditions, but the microspheres showed high stability under ambient conditions. This research provides guidance for the preparation of ACC biomimetic composites and enhances the understanding of biomineralization mechanisms.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Lei Wang, Zeen Yv, Licheng Ma, Qi Zheng, Tong Wang, Xiaokui Che, Xinglan Cui, Hongxia Li, Shenyv Wei, Xinyue Shi
Summary: Hollow calcite microspheres were successfully synthesized in this study, and it was found that the concentration of SDS plays an important role in the spherical crystallization of calcium carbonate. Infrared spectroscopy and conductivity analysis suggested that when the concentration of SDS reached 0.3 g/L in the PEG-SDS system, SDS and PEG formed a spherical supramolecular structure.
Article
Materials Science, Ceramics
Anbuthangam Ashokan, Vivek Rajendran, T. S. Sampath Kumar, Guhan Jayaraman
Summary: The use of eggshell waste for the development of hydroxyapatite resins shows promising results in protein purification with better separation efficiency and higher stability compared to synthetic sources, making it an economical and effective material for chromatographic purification of biomolecules.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Lei Xue, Aiai Zhang, Jinfang Wu, Qi Wang, Yang Liu, Yuansong Zhao, Shangpeng Liu, Ze Liu, Ping Li, Shanghong Zeng
Summary: In this study, nanostructured ZnO hollow microspheres modified with CuO were fabricated for selective CO2 reduction to CO. The addition of CuO weakened adjacent Zn-O bonds, improved zero-valence Zn formation, and provided active sites for CO2 adsorption. Furthermore, the presence of surface defects due to Zn2+ reduction enhanced initial dissociation from CO2 to CO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Rongxin Chen, Li Cheng, Yunfan Liu, Liang Yu, Ruijin Liao, Tingting Wang
Summary: This article introduces a green pyrolysis recycling method for waste composite insulators, in which the experimental device is improved and the recycling process is optimized to obtain nanosilica microspheres (NSMs) with higher purity and controllable particle size for state-of-the-art engineering applications.
Article
Materials Science, Ceramics
Yongping Xue, Feng Jian, Xuewen Zhong, Lu Tang, Xiaojun Yang
Summary: This article investigates the synthesis of magnetic polystyrene@Fe3O4 microspheres by suspension polymerization, which have a porous structure and good magnetic properties suitable for use in magnetically stabilized fluidized-bed reactors. The microspheres have a narrow particle size distribution and high saturation magnetization, showing good acid resistance and suspendability.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jie Zhang, Wenxiang Mu, Fu Bo, Gaohang He, Sunan Ding, Yang Li, Zhitai Jia
Summary: An effective method without a catalyst and template was developed for the synthesis of novel gallium oxide (Ga2O3) micro/nanostructures. Urchin-like microspheres with uniformly distributed nanowires were successfully prepared by heating at high temperature. The resulting product exhibited high crystalline quality and intense ultraviolet-blue emission properties. Possible growth mechanism of the urchin-like microspheres was proposed. These findings highlight the potential of Ga2O3 micro/nanostructures for optoelectronic device applications.
Article
Engineering, Environmental
Mengmeng Sun, Hui Jin, Xiaofu Guo, Shizhao Wang, Jingtao Bi, Zhiyong Ji, Yingying Zhao
Summary: This study aims to achieve the high-value application of calcium during seawater decalcification. Aragonite or vaterite with a high purity exceeding 99% was successfully synthesized using synthetic seawater as a calcium source and Na2CO3/NaHCO3 solution as the carbonate supplier. The effects of coexisting ions in synthetic seawater on crystal polymorph and crystallization kinetics were systematically investigated, and it was found that the presence of Mg2+, K+ or SO42- favored the precipitation of aragonite while Mg-free synthetic seawater favored the formation of vaterite. Additionally, hydrophobic spherical vaterite particles were prepared by in-situ surface modification using alka-nolamide 6502 as a surfactant, demonstrating a promising approach to enhance the utilization of calcium during the seawater decalcification process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Wei Wang, Yunlei Zhong, Xinyu Zhang, Sainan Zhu, Yourong Tao, Yanxin Zhang, Hongsen Zhu, Yifei Zhang, Xingcai Wu, Guo Hong
Summary: Surface self-reconstruction by electrochemical activation is an effective strategy for enhancing OER performance of transition metal compounds. Co-2(OH)(3)Cl microspheres exhibit enhanced OER performance due to etching of lattice Cl- after CV cycles, and further enhancement is achieved with Fe modification. Fe doping facilitates easier etching of lattice Cl- and improved oxygen species absorption, resulting in superior OER activity and stability compared to commercial RuO2.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Qiang Gao, Liang Jia, Aiqin Zhang, Li Wang, Hao Peng, Wenkai Wang, Shenglin Zhou, Jun Xiang, Yi Chen, Haojun Fan
Summary: A type of porous polyurea microspheres for matting coating were prepared by precipitation polymerization, and the factors affecting the surface porosity and roughness were investigated. The results showed that polyvinylpyrrolidone played an important role in controlling the surface porosity, and adding porous polyurea microspheres significantly reduced the gloss of the coating.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jiling Xue, Zhaomin Tong, Yifei Ma, Mei Wang, Suotang Jia, Xuyuan Chen
Summary: In this study, volume scattering diffusers (VSDs) with different thicknesses were used to investigate speckle reduction. VSDs were fabricated by spin-coating a mixture of SiO2 microspheres and SU-8 photoresist, and the Mie scattering effect of VSDs was observed due to the refractive index difference. The experimental results showed that the cascaded stationary and moving VSDs could effectively reduce speckle, providing insights for designing more effective speckle reduction techniques in laser displays.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Polymer Science
Mingzheng Hao, Lei Li, Xiaoming Shao, Ming Tian, Hua Zou, Liqun Zhang, Wencai Wang
Summary: A novel method for fabricating highly conductive Al/Ag core-shell structured microspheres was proposed, resulting in high conductivity and excellent electromagnetic shielding effectiveness.
Article
Materials Science, Paper & Wood
Oleg V. Surov, Marina I. Voronova, Anatoly G. Zakharov
Summary: In this study, methods for synthesizing cellulose nanocrystal (CNC) conjugates with chlorotriazine reactive dyes (RDs) were successfully developed. Characterization using various techniques confirmed the successful covalent bonding of the dyes to the CNC surface, with high colloidal stability observed in aqueous suspensions. Additionally, the CNC-RD conjugates effectively stabilized n-decane emulsions in water, demonstrating their potential in applications such as Pickering emulsions.
Article
Chemistry, Multidisciplinary
Yuan Ma, Yao Li, Xu Fei, Jing Tian, Longquan Xu, Yi Wang
Summary: A mild and efficient strategy for enzyme immobilization was proposed in this study, using size-controlled hydrogel microsphere as an enzyme carrier and immobilizing papain with hydrogen bonding interactions. The immobilized papain showed high catalytic activity and stability for the hydrolysis of allergen protein in cow's milk.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Ilona Plesa, Simone Radl, Uwe Schichler, Franz Ramsauer, Werner Ladstaetter, Irmgard Bergmann, Wolfgang Kern, Sandra Schloegl
Summary: This study provides a comparative investigation on the electrical properties of spherical SiC micro-sized particles, finding that the non-linear current-voltage behavior of SiC microspheres can be controlled by modifying the morphology and chemical surface composition.
Article
Physics, Multidisciplinary
Declan J. Armstrong, Timo A. Nieminen, Itia Favre-Bulle, Alexander B. Stilgoe, Isaac C. D. Lenton, Mark A. Schembri, Halina Rubinsztein-Dunlop
FRONTIERS IN PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Steven Jones, Daniel Andren, Tomasz J. Antosiewicz, Alexander Stilgoe, Halina Rubinsztein-Dunlop, Mikael Kall
Article
Chemistry, Analytical
Alexander B. Stilgoe, Declan J. Armstrong, Halina Rubinsztein-Dunlop
Summary: Trap stiffness is a key property in using optical tweezers as a force transducer and can be determined using maximum-likelihood-estimator analysis (FORMA). By observing a particle fall into an optical trap once at a high stiffness, trap stiffness for a two micron particle can be determined with precision, making it ideal for systems of large numbers of particles without the need for a nanopositioning stage.
Article
Optics
Alexander B. Stilgoe, Halina Rubinsztein-Dunlop
Summary: This method uses correlations between different regions to obtain information about amplitude and phase of a wavefunction, allowing for identification and removal of singularities, potentially useful in beam shaping applications.
Article
Chemistry, Physical
Reza Dehbashi, Taras Plakhotnik, Timo A. Nieminen
Summary: This paper introduces the use of tuned near-zero-index materials for subwavelength projection for the first time. A novel structure composed of a two-layer slab is proposed for long-distance projection of closely spaced objects with subwavelength separation. By adjusting the relationship between the near-zero-index material and the high-index dielectric slab, clear image projection is achieved.
Article
Optics
Reza Dehbashi, Timo A. Nieminen
Summary: In this paper, sets of transformation mapping functions are introduced for the first time to produce near-zero-index metamaterials using nontransformation optics (TO) materials. These proposed structures can be used in applications like radiators with highly tunable directivity when the parameters of the transformation functions are adjusted. Numerical analysis shows that the structures can also be used as radiators with tunable directivity.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Matthew T. Reeves, Kwan Goddard-Lee, Guillaume Gauthier, Oliver R. Stockdale, Hayder Salman, Timothy Edmonds, Xiaoquan Yu, Ashton S. Bradley, Mark Baker, Halina Rubinsztein-Dunlop, Matthew J. Davis, Tyler W. Neely
Summary: We experimentally study the emergence of microcanonical equilibrium states in the turbulent relaxation dynamics of a two-dimensional chiral vortex gas. The resulting long-time vortex distributions are in excellent agreement with the mean-field Poisson Boltzmann equation for the system, and a point-vortex model with phenomenological damping and noise can quantitatively reproduce the equilibration dynamics.
Article
Optics
Alexander B. Stilgoe, Timo A. Nieminen, Halina Rubinsztein-Dunlop
Summary: The interaction between structured light beams and small particles can generate controllable rotational effects and fluid flow. This finding is significant for studying complex fluid dynamics, investigating cell mechanics, and cooling particles in optical traps.
Article
Optics
Timo A. Nieminen, Mark L. Watson, Vincent L. Y. Loke, Alexander B. Stilgoe, Halina Rubinsztein-Dunlop
Summary: For typical cases where rotating optical tweezers are used for measurements, the error caused by spin-orbit conversion is unimportant. However, there are cases where measuring only the spin torque would be completely erroneous.
Article
Optics
Giovanni Volpe, Onofrio M. Marago, Halina Rubinsztein-Dunlop, Giuseppe Pesce, Alexander B. Stilgoe, Giorgio Volpe, Georgiy Tkachenko, Viet Giang Truong, Sile Nic Chormaic, Fatemeh Kalantarifard, Parviz Elahi, Mikael Kall, Agnese Callegari, Manuel Marques, Antonio A. R. Neves, Wendel L. Moreira, Adriana Fontes, Carlos L. Cesar, Rosalba Saija, Abir Saidi, Paul Beck, Joerg S. Eismann, Peter Banzer, Thales F. D. Fernandes, Francesco Pedaci, Warwick P. Bowen, Rahul Vaippully, Muruga Lokesh, Basudev Roy, Gregor Thalhammer-Thurner, Monika Ritsch-Marte, Laura Perez Garcia, Alejandro Arzola, Isaac Perez Castillo, Aykut Argun, Till M. Muenker, Bart E. Vos, Timo Betz, Ilaria Cristiani, Paolo Minzioni, Peter J. Reece, Fan Wang, David McGloin, Justus C. Ndukaife, Romain Quidant, Reece P. Roberts, Cyril Laplane, Thomas Volz, Reuven Gordon, Dag Hanstorp, Javier Tello Marmolejo, Graham D. Bruce, Kishan Dholakia, Tongcang Li, Oto Brzobohaty, Stephen H. Simpson, Pavel Zemanek, Felix Ritort, Yael Roichman, Valeriia Bobkova, Raphael Wittkowski, Cornelia Denz, G. V. Pavan Kumar, Antonino Foti, Maria Grazia Donato, Pietro G. Gucciardi, Lucia Gardini, Giulio Bianchi, Anatolii Kashchuk, Marco Capitanio, Lynn Paterson, Philip H. Jones, Kirstine Berg-Sorensen, Younes F. Barooji, Lene B. Oddershede, Pegah Pouladian, Daryl Preece, Caroline Beck Adiels, Anna Chiara De Luca, Alessandro Magazzu, David Bronte Ciriza, Maria Antonia Iati, Grover A. Swartzlander
Summary: Optical tweezers are tools that use light to push, trap, and manipulate objects without physical contact. Since the 1970s, they have evolved into sophisticated instruments and have been widely used in various fields such as life sciences, physics, and engineering. Applications include precise force and torque measurement, micro-rheology of complex fluids, spectroscopy of single micro- and nano-particles, single-cell analysis, and statistical-physics experiments. This roadmap provides insights into the theoretical foundations, designs, and setups of optical forces and tweezers, and offers perspectives for applications in research fields ranging from biophysics to space exploration.
JOURNAL OF PHYSICS-PHOTONICS
(2023)
Meeting Abstract
Biotechnology & Applied Microbiology
L. Galibert, A. Hyvonen, R. A. E. Eriksson, J. D. Albers, S. Matolla, V. Aho, S. Salminen, S. K. Peltola, S. Weman, T. Nieminen, S. Yla-Herttuala, H. P. Lesch, M. Vihinen-Ranta, K. J. Airenne
HUMAN GENE THERAPY
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Isaac C. D. Lenton, Timo A. Nieminen, Peter J. Reece, Alexander B. Stilgoe, Halina Rubinsztein-Dunlop
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)
(2020)