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Articles by Ke Ran
Biopsy-free versus biopsy-confirmed robot-assisted radical prostatectomy for prostate cancer: a systematic review and meta-analysis of an investigational strategy
Abstract Background: Routine prostate biopsy before radical prostatectomy (RP) provides histopathological confirmation and information for risk stratification but is associated with procedure-related morbidity. Advances in multiparametric magnetic resonance imaging (mpMRI) and prostate-specific membrane antigen positron emission tomography (PSMA PET) have prompted interest in highly selected biopsy-free pathways.
Water-based, large-scale transfer of 2D materials grown on sapphire substrates
Abstract Two-dimensional materials (2DMs) hold significant potential for future electronics, as demonstrated by high-performing devices for sensing, optics, and electronics. However, scalable growth techniques such as metal-organic chemical vapor deposition (MOCVD) typically require high temperatures, which limit their integration with conventional semiconductor processes. Therefore, reliable transfer processes from crystalline, low-contamination growth substrates such as sapphire are essential.
Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications
1 Introduction The rapid advancement of artificial intelligence (AI) and big data is profoundly impacting various aspects of human life. As AI technologies are increasingly adopted for tasks such as text and image generation, the energy consumption associated with data transfer in conventional von Neumann chip architectures has emerged as a critical challenge [1-4].
Unraveling the dynamics of conductive filaments in MoS2-based memristors by operando transmission electron microscopy - Nature Communications
Abstract Advanced operando transmission electron microscopy (TEM) techniques enable the observation of nanoscale phenomena in electronic devices during operation. Here, we investigated lateral memristive devices composed of two dimensional layered MoS2 with Pd and Ag electrodes. Under external bias voltage, we visualized the formation and migration of Ag conductive filaments (CFs) between the two electrodes, and their complete dissolution upon reversing the biasing polarity.
A Novel Mixed-conducting Network in All-oxide Composites: Overcoming Traditional Percolation Constraints
A Novel Mixed-conducting Network in All-oxide Composites: Overcoming Traditional Percolation Constraints Mixed-conducting composites play a pivotal role in ceramic devices for advancing efficient and environment-friendly energy consumption and conversion processes. Conventionally, these materials are synthesized via blending of distinct conducting phases, where the grain percolations of individual phases are considered essential.
in situ observation of reversible phase transitions in Gd-doped ceria driven by electron beam irradiation - Nature Communications
Abstract Ceria-based oxides are widely utilized in diverse energy-related applications, with attractive functionalities arising from a defective structure due to the formation of mobile oxygen vacancies (\({V}_{O}^{\cdot \cdot }\)). Notwithstanding its significance, behaviors of the defective structure and \({V}_{O}^{\cdot \cdot }\) in response to external stimuli remain incompletely explored.
Fabrication of Ultrasmall Si Encapsulated in Silicon Dioxide and Silicon Nitride as Alternative to Impurity Doping
Abstract Further miniaturization of CMOS devices based on impurity doped semiconductors is limited due to statistical fluctuation of the impurity concentration in very small volumes and dopant deactivation, increasing the resistance and power consumption. Based on DFT calculations and backed by experimental data, the nanoscale electronic structure shift induced by anions at surfaces (NESSIAS) was described recently.
Role of Fe/Co Ratio in Dual Phase Ce0.8Gd0.2O2−δ–Fe3−xCoxO4 Composites for Oxygen Separation
3.1.3. Iron Rich Spinel (x = 1 in Fe3−xCoxO4) After investigating the composites with CO and FO, it was interesting to see how the combination of these two oxides in different proportions affected the microstructure and transport properties of dual-phase composites. The first candidate mix of Fe2O3 and Co3O4, where Fe/Co was held in a 1:2 ratio, resulting in a spinel FeCo2O4 (x = 2) phase has been previously published [9].
Salt-assisted pyrolysis of carbon nanosheets and carbon nanoparticles hybrids for efficient microwave absorption
Salt-assisted pyrolysis of carbon nanosheets and carbon nanoparticles hybrids for efficient microwave absorption Wenjian Wang, Weiping Ye, Xingwang Hou, Ke Ran, Yilin Huang, Zidong Zhang, Yuan Fang, Shuai Wang, Rui Zhao and Weidong Xue Abstract Metal-organic framework MOF-derived carbon materials are considered high potential candidates for electromagnetic wave absorbers.
Membranes
Abstract Due to the complexity of both material composition and the structure of the catalyst layer (CL) used in the proton-exchange membrane fuel cell (PEMFC), conjugated heat and mass transfer as well as electrochemical processes simultaneously occur through the CL. In this study, a [...] Read more.
Faster Diffusion of Oxygen Along Dislocations in (La,Sr)MnO3+δ Is a Space‐Charge Phenomenon
Abstract In displaying accelerated oxygen diffusion along extended defects, (La,Sr)MnO3+δ is an atypical acceptor-doped perovskite-type oxide. In this study, 18O/16O diffusion experiments on epitaxial thin films of La0.8Sr0.2MnO3+δ and molecular dynamics (MD) simulations are combined to elucidate the origin of this phenomenon for dislocations: Does diffusion occur along dislocation cores or along space-charge tubes?
Phase formation and performance of solid state reactive sintered Ce0.8Gd0.2O2−δ - FeCo2O4 composites
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