Electronic and thermal properties of Ag-doped single crystal zinc oxide via laser-induced technique

Huan, Xing; Wang, Hui‐Qiong; Song, Tinglu; Li, Chunli; Dai, Yang; Fu, Gengming; Kang, Junyong; Zheng, Jin‐Cheng

doi:10.1088/1674-1056/acae74

Cited by 3 publications

(1 citation statement)

References 62 publications

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“…Most models proposed in this work can be realized in experiments in both the macroscopic scale and the microscopic scale, as long as the Fourier law is still valid within the scale of size. With progress of thermal conductivity in materials in multi-scale [46,[74][75][76][77][78][79][80][81][82] or thin films [83,84] or bulk form, [83][84][85][86] the design of efficient thermal rectifiers will have more choices of components. Many advances of characterization [87,88] will be helpful to reveal the microstructures and properties (such as phonon scattering, thermal conductivity, thermal diffusion, thermal capacity, etc.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Zhang

Wang

et al. 2023

Chinese Phys. B

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Thermal rectification is an exotic thermal transport phenomenon, an analog to electrical rectification, in which heat flux along one direction is larger than that in the other direction and is of significant interest in electronic device application. However, achieving high thermal rectification efficiency or rectification ratio is still a scientific challenge. In this work, we performed a systematic simulation of thermal rectification by considering both efforts of thermal conductivity asymmetry and geometrical asymmetry in a multi-segment thermal rectifier. It is found that the high asymmetry of thermal conductivity and the asymmetry of the geometric structure of multi-segment thermal rectifiers can significantly enhance the thermal rectification, and the combination of both thermal conductivity asymmetry and geometrical asymmetry can further improve thermal rectification efficiency. This work suggests a possible way for improving thermal rectification devices by asymmetry engineering.

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Section: Discussionmentioning

confidence: 99%

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Zhang

Wang

et al. 2023

Chinese Phys. B

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Advances of machine learning in materials science: Ideas and techniques

Sin¹,

Ng²,

Wang³

et al. 2023

Front. Phys.

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In this big data era, the use of large dataset in conjunction with machine learning (ML) has been increasingly popular in both industry and academia. In recent times, the field of materials science is also undergoing a big data revolution, with large database and repositories appearing everywhere. Traditionally, materials science is a trial-and-error field, in both the computational and experimental departments. With the advent of machine learning-based techniques, there has been a paradigm shift: materials can now be screened quickly using ML models and even generated based on materials with similar properties; ML has also quietly infiltrated many sub-disciplinary under materials science. However, ML remains relatively new to the field and is expanding its wing quickly. There are a plethora of readily-available big data architectures and abundance of ML models and software; The call to integrate all these elements in a comprehensive research procedure is becoming an important direction of material science research. In this review, we attempt to provide an introduction and reference of ML to materials scientists, covering as much as possible the commonly used methods and applications, and discussing the future possibilities.

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Preparation of carbon/nickel composites by magnetron sputtering and study on electromagnetic shielding effectiveness

Zhang,

Fan,

et al. 2024

AIP Advances

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A pure nickel film and a carbon/nickel (C/Ni) composite film were produced using radio frequency magnetron sputtering. The structure of the films was regulated by adjusting the sputtering power and the time allocation of sputtering nickel and graphite targets. Furthermore, a scanning electron microscope, an x-ray diffractometer, and a Raman spectrometer were employed for sample characterization. The results demonstrated that the thickness of the pure nickel film and C/Ni composite film with a total deposition time of 60 s was between 44.96 and 65.31 nm. The nickel film exhibited preferential growth along the crystal plane (111), and the structure of carbon materials was in the second stage of the three-stage model known as “amorphization trajectory of graphite.” The prepared films’ electromagnetic interference shielding effectiveness (EMI SE) in the X-band was investigated using a vector network analyzer. It was observed that the C/Ni composite film with a thickness of 44.96 nm demonstrated a superior EMI SE with a maximum value reaching 21 dB. The EMI SE of the C/Ni composite film can reach the same performance and even exceed that of the pure nickel film obtained at the power of 200 W for 60 s in certain frequency segments. In conclusion, the pure nickel film can be replaced by C/Ni composite film prospectively due to their excellent EMI SE along with advantages such as reduced thickness, lighter weight, and lower cost.

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Electronic and thermal properties of Ag-doped single crystal zinc oxide via laser-induced technique

Cited by 3 publications

References 62 publications

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Advances of machine learning in materials science: Ideas and techniques

Preparation of carbon/nickel composites by magnetron sputtering and study on electromagnetic shielding effectiveness

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