Article
Engineering, Multidisciplinary
Xiang Fang, Jie Xie, Shiying Chu, You Jiang, Yuting An, Chang Li, Xiaoyun Gong, Rui Zhai, Zejian Huang, Chunling Qiu, Xinhua Dai
Summary: In this study, a quadrupole-linear ion trap (Q-LIT) tandem mass spectrometer was designed and built for the accurate and efficient measurement of small molecule disease markers. The developed method demonstrated high sensitivity and resolution, simplified the pre-treatment process, and showed potential for biomarker determination in clinical diagnosis and therapeutics.
Article
Chemistry, Analytical
Conner C. Harper, Veena S. Avadhani, Emeline Hanozin, Zachary M. Miller, Evan R. Williams
Summary: Ion-ion interactions between simultaneously trapped ions have been studied in detail using a dynamic measurement method. The results show that these interactions have negligible effects on mass accuracy.
ANALYTICAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
N. V. Konenkov, C. -F. Ding, A. N. Konenkov
Summary: Ion trajectory numerical simulation is used to study the effects on linear ion trap excitation contour and find that high resolution and excitation efficiency can be achieved under certain conditions.
Article
Engineering, Electrical & Electronic
Xiaoqian Zhu, Yuanxiang Zhou, Yunxiao Zhang, Luming Zhou, Xin Huang
Summary: This study investigated the effects of nano-ZrO2 on the performance of silicone rubber (SiR), and found that the addition of nano-ZrO2 significantly improved the mechanical and electrical properties of SiR. Nano-ZrO2 increased the tensile strength and breakdown strength of SiR, while inhibiting space charge accumulation. Nano-ZrO2 also improved the cross-linking degree and interior structure of SiR.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Chemistry, Analytical
Xichi Lu, John T. W. Yeow, Gongyu Jiang, Yu Xiao, Rujiao Yao, Qi Zhang, Jiacheng Song, Jinyuan Yao
Summary: This study proposes two models of miniaturized HreLIT and investigates the relationship between mass resolution and electrode stretch distance through theoretical simulations. The 2-slit model shows a higher peak resolution compared to the other model, and reducing the scan rate can improve the resolution for ions with m/z = 119. The theoretical confirmation of the mass spectrometry capability of miniature HreLIT lays the foundation for future fabrication using MEMS technology.
Article
Thermodynamics
Sanghoon Lee, Yosheph Yang, Seong-Hyeon Park
Summary: The increasing number of space objects poses potential risks to both operational space systems and ground safety. Accurate prediction of the trajectory and survivability of space objects through re-entry analysis is necessary to prevent collisions with the ground. Ablation gas emissions, depending on the material of the space objects, should also be considered due to their significant impact on aerothermodynamics and gas-surface interaction. This study performed re-entry analyses of carbon-based space objects and analyzed the effects of ablation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Quantum Science & Technology
Yuanheng Xie, Jiafeng Cui, Marissa D'Onofrio, A. J. Rasmusson, Stephen W. Howell, Philip Richerme
Summary: The design and experimental demonstration of an open-endcap radio frequency trap for confining ion crystals in a radial-two dimensional (2D) structural phase is presented. The trap features a central axis free of obstructions for site-resolved imaging of ions in the 2D crystal plane, with confining potentials provided by segmented blade electrodes. The operation of the trap is validated by confining up to 29 ions in a 2D triangular lattice with both in-plane principal axes of the crystal lying in the radial direction.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Applied
Fan Wu, Sally Mabrouk, Miaomiao Han, Yanhua Tong, Tiansheng Zhang, Yuchen Zhang, Raja Sekhar Bobba, Quinn Qiao
Summary: It was found that the electron and hole currents in organo-lead perovskite-based single-carrier devices exhibit significant hysteresis under forward and reverse scanning due to mobile ions. The measurement history has a detrimental effect on hysteresis and can result in overestimation or underestimation of extracted electrical values. Mobile ionic defects enhance or shield the charge in traps through ionic charging/discharging, affecting the determination of transport properties.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Engineering, Aerospace
Luiz M. B. C. Campos, Manuel J. S. Silva
Summary: This study investigates the safety zone around the flight path of a rocket and the trajectory of a tumbling body, as well as the relationship between the tumbling body's mass and aerodynamic properties.
Article
Optics
Liudmila A. Zhukas, Maverick J. Millican, Peter Svihra, Andrei Nomerotski, Boris B. Blinov
Summary: In this study, direct observation of micromotion for multiple ions in a laser-cooled trapped ion crystal was discussed using a time-resolving, single-photon-sensitive camera. The technique allows for measurement of micromotion amplitude and phase for each ion in the crystal, making it sensitive to tilts and shifts of the ion chain. This micromotion detection method is suitable for complex ion configurations and does not require additional equipment or laser beams.
Article
Chemistry, Physical
A. Poindron, J. Pedregosa-Gutierrez, C. Jouvet, M. Knoop, C. Champenois
Summary: This study demonstrates through molecular dynamics simulations how a laser-cooled ion cloud in a linear radio-frequency trap can achieve ultimate sensitivity for detecting individual charged heavy molecular ions.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Materials Science, Composites
B. Thangabalan, R. Sarathi, N. Harid, H. Griffiths
Summary: The effect of corona aging on the surface potential dynamics and charge trap characteristics of silicone rubber alumina nanocomposite was investigated. The addition of alumina filler increased the surface potential decay time and maximum trap energy. Corona aging led to a reduction in trap depth, and the addition of alumina filler limited the degradation and change in charge trap distribution. An analysis of space charge behavior and comparison of different nanocomposites were presented. Based on the results obtained using the pulsed electro-acoustic technique (PEA), it was concluded that the concentration of space charge and enhancement in the electric field increased with aging duration, with the highest values observed in the case of 60 min corona-aged pure silicone rubber. The recovery of trap distribution after corona discharges was faster for the virgin sample and slower for the sample with 5 wt% alumina.
POLYMER COMPOSITES
(2023)
Article
Physics, Applied
Sourav Kumar Kajli, Debdutta Ray, Somnath C. Roy
Summary: This study investigates the electrical conduction mechanism in single CuO nanowires, showing an anomalous dependence of current density on the diameter of the nanowires. The research reveals different types of charge transport behaviors in CuO nanowires at room temperature, with higher trap density and activation energy in thicker nanowires hindering charge transport and resulting in lower conductivity.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Doyel Pandey, Somnath Bhattacharyya
Summary: This study investigated the impact of solid polarization of a dielectric membrane on ion transport in a conical nanopore, highlighting the importance of considering solid polarization in analyzing electroosmotic flow and ion transport in such systems.
APPLIED MATHEMATICAL MODELLING
(2022)
Review
Chemistry, Physical
Robert Usiskin, Joachim Maier
Summary: Modern batteries are complex systems with high-density interfaces, and device performance is often determined by effects at these interfaces. Space charge layers at interfaces can modify charge transport, transfer, and storage properties. Practical interfaces exhibit additional complex phenomena like passivation layer formation, current constriction, and partial blocking of mobile species. Specific interfacial issues related to mass storage modes are discussed, with a focus on solid-state batteries.
ADVANCED ENERGY MATERIALS
(2021)