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| 1 | Review:Phonon Engineering in Thermoelectric Materials显示文摘One of the abundantly available energies that could be found in industrial power plants, running vehicles, nuclear power stations, etc. is known as thermal energy. A physical phenomenon known as thermoelectricity converts thermal energy into electrical energy and vice versa, providing a green route for power generation and a potential solution to the world energy crisis. The thermoelectric conversion efficiency is generally characterized by the temperature-dependent dimensionless figure of merit(zT), which is generally promoted by increasing the power factor and reducing the thermal conductivity. The present work reviews heat transmission in thermoelectric materials, particularly phonon engineering to reduce the lattice thermal conductivity. The two leading strategies of point defects engineering and nanostructuring for reducing thermal conductivity have been summarized. The optimized reported zTs of various thermoelectric materials in terms of reduced thermal conductivity have been presented. | Asfandiyar Sichen Duan Jun Mao Qian Zhang | 2022 | Journal of Harbin Institute of Technology(New Series)2022，29，6： | 0 |
| 2 | Mechanical properties of thermoelectric generators显示文摘To satisfy the requirements of practical applications,thermoelectric generators should be highly efficient and mechanically robust.Recently,progress in designing high-performance thermoelectric generators has been made.However,the mechanical properties of thermoelectric generators are still unsatisfactory.In this review,studies on the mechanical properties of thermoelectric generators are summarized.The me-chanical properties of bulk thermoelectric generators will be first discussed.In this section,the mechan-ical properties of thermoelectric materials and the strategies for improving their mechanical properties are emphasized.Since the device’s failure usually occurs at the interface between the thermoelectric ma-terials and electrode,the joint strength of electrodes and thermoelectric materials will be overviewed.After that,the mechanical properties of the inorganic thin-film thermoelectric devices will be discussed.Since the figure of merit for the flexibility of thermoelectric materials depends on the film thickness,elastic modulus,and yield strength,the synthesis methods of thin-film thermoelectric materials will be reviewed.Finally,this review will be concluded with a discussion on flexible organic thermoelectric de-vices and flexible devices using bulk legs. | Xin Bao Shuaihang Hou Zhixin Wu Xiaodong Wang Li Yin Yijie Liu Huolun He Sichen Duan Baolin Wang Jun Mao Feng Cao Qian Zhang | 2023 | Journal of Materials Science & Technology2023，，17： | 0 |
| 3 | Ablation of Zfhx4 results in early postnatal lethality by disrupting the respiratory center in mice显示文摘Breathing is an integrated motor behavior that is driven and controlled by a network of brainstem neurons.Zfhx4 is a zinc finger transcription factor and our results showed that it was specifically expressed in several regions of the mouse brainstem.Mice lacking Zfhx4 died shortly after birth from an apparent inability to initiate respiration.We also found that the electrical rhythm of brainstem‒spinal cord preparations was significantly depressed in Zfhx4-null mice compared to wild-type mice.Immunofluorescence staining revealed that Zfhx4 was coexpressed with Phox2b and Math1 in the brainstem and that Zfhx4 ablation greatly decreased the expression of these proteins,especially in the retrotrapezoid nucleus.Combined ChIP‒seq and mRNA expression microarray analysis identified Phox2b as the direct downstream target gene of Zfhx4,and this finding was validated by ChIP‒qPCR.Previous studies have reported that both Phox2b and Math1 play key roles in the development of the respiratory center,and Phox2b and Math1 knockout mice are neonatal lethal due to severe central apnea.On top of this,our study revealed that Zfhx4 is a critical regulator of Phox2b expression and essential for perinatal breathing. | Meiqin Zhang Sichen Du Huayuan Ou Renjie Cui Nan Jiang Yifeng Lin Runsheng Ge Duan Ma Jin Zhang | 2021 | Journal of Molecular Cell Biology2021，13，3： | 0 |
| 4 | Anomalous Thermopower and High ZT in GeMnTe2 Driven by Spin’s Thermodynamic Entropy显示文摘NaxCoO_(2)was known 20 years ago as a unique example in which spin entropy dominates the thermoelectric behavior.Hitherto,however,little has been learned about how to manipulate the spin degree of freedom in thermoelectrics.Here,we report the enhanced thermoelectric performance of GeMnTe_(2)by controlling the spin’s thermodynamic entropy.The anomalously large thermopower of GeMnTe_(2)is demonstrated to originate from the disordering of spin orientation under finite temperature.Based on the careful analysis of Heisenberg model,it is indicated that the spin-system entropy can be tuned by modifying the hybridization between Te-p and Mn-d orbitals.As a consequent strategy,Se doping enlarges the thermopower effectively,while neither carrier concentration nor band gap is affected.The measurement of magnetic susceptibility provides a solid evidence for the inherent relationship between the spin’s thermodynamic entropy and thermopower.By further introducing Bi doing,the maximum ZT in Ge_(0.94)Bi_(0.06)MnTe_(1.94)Se_(0.06)reaches 1.4 at 840 K,which is 45%higher than the previous report of Bi-doped GeMnTe_(2).This work reveals the high thermoelectric performance of GeMnTe_(2)and also provides an insightful understanding of the spin degree of freedom in thermoelectrics. | Sichen Duan Yinong Yin Guo-Qiang Liu Na Man Jianfeng Cai Xiaojian Tan Kai Guo Xinxin Yang Jun Jiang | 2021 | Research2021，，1： | 0 |
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