Article
Optics
Jacob R. Lindale, Shannon L. Eriksson, Warren S. Warren
Summary: The theoretical description of the interplay between coherent evolution and chemical exchange, which was originally developed for magnetic resonance and later applied to other spectroscopic regimes, was derived under incorrect statistical assumptions. Correcting these assumptions allows access to the exact form of the chemical exchange interaction, derived within the Lindblad master equation formalism for generality. The exact form of the interaction differs from the traditional equation only by a scalar correction factor derived from higher-order interactions, and it regularly improves the convergence radius of the solution (thus increasing the allowable step size in calculations) by up to an order of magnitude, without any additional computational cost.
Article
Optics
Yanning Ma, Kaixuan Zhang, Yaoguo Wang, Ke Yang, Yueyang Zhai, Jixi Lu
Summary: This paper proposes a fast extraction method for the electron spin-relaxation rate and circumvents the interference of optical pumping rate in traditional methods. It enables monitoring the spin-relaxation rate under arbitrary polarization, improving the accuracy of the measurement results.
Article
Polymer Science
Ken Cham-Fai Leung, Kathy W. Y. Sham, Josie M. Y. Lai, Yi-Xiang J. Wang, Chi-Hin Wong, Christopher H. K. Cheng
Summary: The study optimized the gene delivery efficiency of ternary composites in transfected glioblastoma cells by tuning the bPEI/citrate-NP ratios. Among the composites prepared, the 0.2ng bPEI/0.5μg pDNA/1.0μg citrate-NP ternary composite showed the best cellular uptake efficiency, while the composite comprising 0.1ng bPEI/0.5μg pDNA/0.1μg citrate-NP exhibited the optimal efficiency for plasmid DNA uptake into the nucleus.
Article
Polymer Science
Stepan A. Ostanin, Maxim Mokeev, Vjacheslav V. Zuev
Summary: The domain size of rigid domains in multiblock copolymers was investigated and found to be mainly influenced by the presence of interpenetrating segments of soft blocks.
Article
Materials Science, Multidisciplinary
Chunmei Wang, Shouheng Zhang, Yicong Huang, Tao Sang, Derang Cao, Xia Wang, Jie Xu, Guoxia Zhao, Cuiling Wang, Shandong Li
Summary: The dynamic interlayer exchange coupling (IEC) in oblique sputtered Fe56Co24B20(26.5 nm)/Ru(t(Ru))/Fe56Co24B20(26.5 nm) trilayers with various Ru thicknesses t(Ru) was studied using Transverse and longitudinal vector network analyzer ferromagnetic resonance (VNA-FMR) spectroscopy. Different coupling behaviors were observed at different Ru thicknesses, including antiferromagnetic (AFM) and ferromagnetic (FM) couplings, with oscillatory behavior of the bilinear IEC coefficient J(1) obtained through simulation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Environmental
Dongsheng Li, Qixuan Dai, Hu Chen, Huirong Lin, Zhixiang Lu, Huili Zheng, Peng Lv, Wei Li, Gang Liu, Chengchao Chu
Summary: This research presents a novel computed tomography/magnetic resonance (CT/MR) imaging-guided X-ray induced dynamic therapy (XDT) nanotheranostic platform based on TixOy/Ru reaction units. The new metal-organic nanostructure (TiZrRu-MON) shows high reactive oxygen species (ROS) production and ultrahigh longitudinal relaxivity, allowing for efficient tumor elimination under X-ray irradiation with the guidance of CT/MR dual-mode imaging.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
K. Deva Arun Kumar, Dilip K. Meena, Rapaka S. C. Bose, Ramcharan Meena, Prashantha Murahari, Paolo Mele, K. Ramesh
Summary: The decoupling of electrical and thermal transport routes through the synthesis of semiconductor nanostructure composites is an effective way to increase the efficiency of thermoelectric materials. The systematic increase of Seebeck coefficient and electrical conductivity, along with the optimal reduction of thermal conductivity, was achieved in Sb2Te3/ZnTe nanostructure composites. The improvement in electrical conductivity and Seebeck coefficient with temperature, as well as the variation in optical bandgap and optimization of thermal conductivity, were observed in the study.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Mark A. Keppler, Zachary A. Steelman, Zachary N. Coker, Milos Nesladek, Philip R. Hemmer, Vladislav V. Yakovlev, Joel N. Bixler
Summary: By designing an optical streaking nitrogen vacancy microscope, we have achieved high-speed magnetic field wave imaging and analyzed the dynamics of currents and magnetic fields on a microscopic scale. The system has high temporal and spatial resolution, capable of detecting weak magnetic fields and capturing fast-moving electromagnetic needles.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jiaojiao Ji, Shuang Zhang, Chunxiang Cao, Shubing Su, Runjian Jiang, Ailin Xia, Huiyan Zhang, Hailing Li, Zhiyuan Liu, Chuangui Jin
Summary: This study investigated the preparation of SrFe12O19/Cae(2)O(4) composites using chemical coprecipitation method, and studied the effects of exchange coupling interaction and aligning magnetic field on magnetic properties. The results showed that exchange coupling interaction improved the saturation magnetization and reduced coercivity, while aligning magnetic field enhanced these properties without affecting phase composition, morphology, and exchange coupling interaction significantly.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Hsueh-Ying Chen, C. Blake Wilson, Robert Tycko
Summary: The spatial resolution of MRI is limited by signal detection sensitivity, but can be improved by performing measurements at low temperature and using dynamic nuclear polarization (DNP) technique. This allows for higher resolution and shorter data acquisition times, offering a promising direction for high-resolution MRI studies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Xin Xiong, Feng Gao, Keping Zhou, Cong Li, Yanan Zhang
Summary: To study the physical properties and dynamic mechanical response characteristics of rock materials in seasonally frozen regions, various tests were conducted on sandstones treated with different numbers of freeze-thaw cycles. The experimental results showed that the density and P-wave velocity of sandstone decrease, while the porosity increases with an increasing number of freeze-thaw cycles. The dynamic tensile strength of water-saturated sandstone decreases gradually, while that of frozen sandstone increases with an increasing number of freeze-thaw cycles. Moreover, the dynamic tensile strength of both water-saturated and frozen sandstone increases with an increasing loading rate under the same number of freeze-thaw cycles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yunhua Luo
Summary: In this paper, a new method is introduced to address the issue of discrepancy between upper and lower bounds in micromechanics models. By utilizing an iterative isotropization procedure, the upper and lower bounds are made coincident, providing a prediction of the material's property value. Experimental validation shows that this method predicts the effective elastic properties more accurately, especially for composites with large phase property contrasts and high inclusion volume fractions.
RESULTS IN PHYSICS
(2022)
Article
Metallurgy & Metallurgical Engineering
Tu-bing Yin, Fei-yan Jin, Qiang LI, Xi-bing LI
Summary: This study investigated the influence of microwave on the dynamic mechanical properties of basalt through experimental tests and characterized the thermal damage using non-destructive testing and nuclear magnetic resonance technology. The results showed that increasing the microwave power and exposure time led to a continuous decrease in the P-wave velocity, dynamic compressive strength, and elastic modulus of basalt, and the dynamic failure mode tended to become more complex fractures.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
S. A. Raza, D. E. Gonzalez-Chavez, M. A. Correa, F. Bohn, R. L. Sommer
Summary: We investigated the static and dynamic magnetic properties of exchange-biased Co2FeAl/IrMn films systematically. The study reveals that the exchange bias and rotatable anisotropy increase with the thickness of the IrMn layer. Surprisingly, the rotatable anisotropy does not decrease as observed in other systems. The magnetic damping parameter α ranges between 5.47 x 10(-3) and 8.89 x 10(-3) for the CoFeAl/IrMn systems, without a clear correlation with the IrMn thickness or rotatable anisotropy.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Biomedical
Huaixin Zhao, Jigang Lv, Feng Li, Zhili Zhang, Chunzhi Zhang, Zi Gu, Dayong Yang
Summary: The study demonstrated the preparation of DNA-Mn hybrid nanoflower (DMNF) using manganese ions mediated enzymatic biomineralization, with controllable morphology and size. Encoding aptamer sequence into the template achieved tumor-targeted imaging, showing enhanced magnetic resonance imaging effect in an acidic environment.
