Article
Engineering, Geological
Hyojung Ko, Hyunwook Choo, Koochul Ji
Summary: Temperature has a significant effect on the electrical conductivity of soils, with different mechanisms for pore water conduction and surface conduction. This study aimed to determine the temperature compensation parameter for soils based on the ratio of surface conduction to total conductivity. Silica sand and kaolin clay were used as dominant materials for pore water conduction and surface conduction, respectively. The results showed that the temperature dependency of electrical conductivity varied for different types of soils, and an empirical model was suggested to capture this variation.
ENGINEERING GEOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Rousan Debbarma, Ngoc Hoang Lan Nguyen, Vikas Berry
Summary: Defects in two-dimensional nanomaterials play a crucial role in their electrical behavior and need to be carefully considered. Some of the conduction mechanisms discussed include thermally activated conduction, nearest neighbor hopping, Efros-Shklovskii variable range hopping, and Mott variable range hopping.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Multidisciplinary
Yuyang Wang, Ruipeng Shen, Shuo Wang, Yu-Mo Zhang, Sean Xiao-An Zhang
Summary: This paper proposes a new strategy for designing bistable electrochromic materials based on polymer-assisted dynamic metal-ligand coordination. Through sufficient characterization of the mechanism and materials, the optimization design of electrochromic displays was successfully achieved, resulting in good performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Liliana Maldonado, Santiago E. Herrera, Federico J. Williams, Mario Tagliazucchi
Summary: This study demonstrates that fluctuations in barrier thickness can result in systematically underestimated tunneling decay coefficients, leading to incorrect assumptions about long-range electron tunneling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Applied
Caiwen Chen, Pan Chen, Baojin Chu
Summary: Chemical reduction is commonly used to enhance the dielectric properties of peroviskite oxides, leading to the appearance of dielectric anomalies in ceramics. These anomalies are primarily attributed to the hopping of electrons between defective lattice sites and the interaction of water with the ceramic surface region.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
L. H. Nguyen, N. T. Dang, N. Dang, L. Bau, P. H. Nam, L. T. H. Phong, D. H. Manh, P. T. Phong
Summary: The substitution of Ti at the Mn site in La0.7Ba0.3Mn1-xTixO3 samples has been found to affect the structural, magnetic, and electrical properties, leading to a decrease in Tc and tuning of the electrical transport behavior. Metal-insulator transition is observed in specific samples, while a rapid decrease in T-C is attributed to non-ferromagnetic Ti ions weakening the double-exchange interaction. Various conduction models were used to analyze the electrical resistivity data in metallic and insulating regions of the samples. The study provides insights into the electronic transport nature in La0.7Ba0.3Mn1-xTixO3 materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Febin Paul, Shashi Paul
Summary: Organic memory devices are a rapidly evolving field, but there is a lack of consensus in terms of material behavior and switching mechanisms. This study aims to understand influencing factors in organic memory devices by compiling various works and analyzing charge storage mechanisms and different switching mechanisms.
Article
Materials Science, Multidisciplinary
Zuhui Shi, Zemin He, Chunsheng Li, Zongcheng Miao, Dong Wang, Yi Luan, Yuzhan Li, Yuzhen Zhao
Summary: This paper investigated the preparation and electro-optical properties of PDLC films, and found that the hole size of the polymer network had a significant influence on the performance of PDLC films. By introducing BTO nanoparticle-laden nanofibres films, the electro-optical properties of PDLC films were improved and aging resistance was enhanced. The development of reticular nanofibres films doped with PDLCs will have significant implications for the technological applications of PDLC-based equipment.
APPLIED MATERIALS TODAY
(2022)
Review
Materials Science, Multidisciplinary
Shengduo Xu, Xiao-Lei Shi, Matthew Dargusch, Chongan Di, Jin Zou, Zhi-Gang Chen
Summary: Conducting polymers have unique advantages in wearable and implantable thermoelectric devices, but their thermoelectric performance still lags behind traditional materials. Researchers have made progress in optimizing strategies and device fabrication techniques, showing a promising future for conducting polymer-based flexible thermoelectric devices.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Min-Woo Kim, Max L. Lifson, Rebecca Gallivan, Julia R. Greer, Bong-Joong Kim
Summary: Ultralow-k materials with mechanical resilience and electrical stability are needed for high voltage devices. 3D hollow-beam nanolattices have emerged as promising candidates, but their properties deteriorate after five stress cycles. In this study, alumina nanolattices with different density distributions demonstrate a deterministic mechanical response and higher electrical breakdown strength. These nanolattices exhibit ultralow-k, complete electrical and dielectric stability, and mechanical recoverability over 100 compressions to 62.5% strain. The enhanced insulation and long-term stability are explained by the bi-phase deformation mechanism, providing high strength and ductility.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
L. T. T. Ngan, N. T. Dang, N. X. Phuc, L. Bau, N. Dang, D. H. Manh, P. H. Nam, L. H. Nguyen, P. T. Phong
Summary: The magnetic and electrical properties of substituted La0.7Sr0.3Mn1-xCoxO3 perovskite (0 ≤ x ≤ 1) were investigated. The study revealed that Co4+ ions were in a high spin state, while the spin state of Co3+ ions changed from high spin to intermediate-spin state at x=0.8. The metallic conduction behavior of x=0 and x=1 samples was analyzed using an empirical equation, showing the importance of electron-magnon scattering effects. All other samples exhibited semiconductor-like behavior throughout the studied temperature range. The resistivity data of semiconducting La0.7Sr0.3Mn1-xCoxO3 could be fitted to the variable range hopping model, with the hopping distance and average hopping energy decreasing with increasing Co concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biochemistry & Molecular Biology
Anna Orieshyna, Jennifer L. Puetzer, Nadav Amdursky
Summary: Collagen, a widely studied protein, not only plays a fundamental role in our bodies but also finds extensive applications in tissue engineering scaffolds. This study reveals a new role for hydroxyproline (Hyp), an abundant component of collagen, in supporting proton transport (PT) through collagen fibrils. The researchers found that adding a methanesulfonyl group significantly enhances PT, while reverting Hyp to proline (Pro) reduces PT efficiency. Understanding the role of Hyp in PT can contribute to a better understanding of the physiological functions of collagen, and modulating conductivity in collagen is crucial in regenerative medicine.
Article
Materials Science, Ceramics
Linhao Li, Brant Walkley, Ian M. Reaney, Derek C. Sinclair
Summary: Low levels of impurities can significantly impact the electrical properties of metal oxides, influencing defect chemistry and conduction mechanisms. High purity reagents are crucial in studying ferrite-based perovskites to achieve accurate results.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Polymer Science
Gregory Soon How Thien, Kah-Yoong Chan, Ab Rahman Marlinda
Summary: Halide perovskites (HPs) are currently being widely used in various applications such as photovoltaics and resistive switching (RS) devices. The properties of high electrical conductivity, tunable bandgap, good stability, and low-cost synthesis and processing make HPs promising as active layers in RS devices. Recent reports have also discussed the use of polymers to improve the RS properties of lead (Pb) and Pb-free HP devices. This review explores the role of polymers in optimizing HP RS devices and successfully investigates their effects on the ON/OFF ratio, retention, and endurance properties.
Article
Chemistry, Physical
Md Azimul Haque, Diego Rosas Villalva, Luis Huerta Hernandez, Roba Tounesi, Soyeong Jang, Derya Baran
Summary: This perspective discusses the central role of dopants in organic and halide perovskite-based semiconductors for energy conversion devices, highlighting various p- and n-type dopants explored and their challenges and limitations in modifying device performance. Understanding doping-induced changes in electronic properties and their impact on device performance is crucial for enhancing overall device performance.
CHEMISTRY OF MATERIALS
(2021)