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Lightweight diamond/Cu interface tuning for outstanding heat conduction 被引量:4
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作者 wenjie dou Congxu Zhu +6 位作者 Xiwang Wu Xun Yang Wenjun Fa Yange Zhang Junfeng Tong Guangshan Zhu Zhi Zheng 《Carbon Energy》 SCIE EI CAS CSCD 2023年第12期229-240,共12页
With rapid developments in the field of very large-scale integrated circuits,heat dissipation has emerged as a significant factor that restricts the high-density integration of chips.Due to their high thermal conducti... With rapid developments in the field of very large-scale integrated circuits,heat dissipation has emerged as a significant factor that restricts the high-density integration of chips.Due to their high thermal conductivity and low thermal expansion coefficient,diamond/Cu composites have attracted considerable attention as a promising thermal management material.In this study,a surface tungsten carbide gradient layer coating of diamond particles has been realized using comprehensive magnetron sputtering technology and a heat treatment process.Diamond/Cu composites were prepared using high-temperature and high-pressure technology.The results show that,by adjusting the heat treatment process,tungsten carbide and di-tungsten carbide are generated by an in situ reaction at the tungsten–diamond interface,and W–WC–W_(2)C gradient layer-coated diamond particles were obtained.The diamond/Cu composites were sintered by high-temperature and high-pressure technology,and the density of surface-modified diamond/Cu composites was less than 4 g cm^(-3).The W–WC–W_(2)C@diamond/Cu composites have a thermal diffusivity as high as 331 mm^(2)s^(-1),and their thermal expansion coefficient is as low as 1.76×10^(-6)K^(-1).The interface coherent structure of the gradient layer-coated diamond/copper composite can effectively improve the interface heat transport efficiency. 展开更多
关键词 coherent interface diamond composite heat conduction surface modification
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A robust interphase via in-situ pre-reconfiguring lithium anode surface for long-term lithium-oxygen batteries
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作者 Pan Xu Xiaodong Lin +8 位作者 Zongqiang Sun Kaixuan Li wenjie dou Qing Hou Zhiyou Zhou Jiawei Yan Mingsen Zheng Ruming Yuan Quanfeng Dong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第9期186-194,I0006,共10页
Lithium-oxygen(Li-O) battery is considered as one of the most promising alternatives because of its ultrahigh theoretical energy density. However, their cycling stability is severely restricted by the uncontrollable d... Lithium-oxygen(Li-O) battery is considered as one of the most promising alternatives because of its ultrahigh theoretical energy density. However, their cycling stability is severely restricted by the uncontrollable dendrite growth and serious oxygen corrosion issue on Li surface. Herein, a sulfur-modified Li surface can be successfully constructed via chemical reaction of guanylthiourea(GTU) molecule on Li,which can induce the selectively fast decomposition of lithium bis(trifluoromethanesulfonyl)imide(LiTFSI) to form a smooth and stable inorganics-rich solid-electrolyte interphase(IR-SEI) during the subsequent electrochemical process. Such an IR-SEI cannot only offer a highly reversible and stable Li plating/stripping chemistry with dendrite-free property(10 mA cm^(-2)-10 mAh cm^(-2), > 0.5 years;3 mA cm^(-2)-3 m Ah cm^(-2), > 1 year) but also endows the Li metal an anti-oxygen corrosion function, thereby significantly improving the cycling stability of Li-Obatteries. This work provides a new idea for constructing functional solid-electrolyte interphase(SEI) to achieve highly stable Li metal anode. 展开更多
关键词 Solid-electrolyte interphase Guanylthiourea Sulfur-modified Li surface Li metal Li-O_(2)batteries
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Highly sensitive diamond X-ray detector array for high-temperature applications
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作者 wenjie dou Chaonan Lin +8 位作者 Wei Fan Xun Yang Chao Fang Huaping Zang Shaoyi Wang Congxu Zhu Zhi Zheng Weimin Zhou Chongxin Shan 《Chip》 EI 2024年第3期43-49,共7页
Diamond is a highly suitable material for X-ray detectors that can function effectively in harsh environments due to its unique properties such as ultrawide bandgap,high radiation resistance,excellent carrier mobility... Diamond is a highly suitable material for X-ray detectors that can function effectively in harsh environments due to its unique properties such as ultrawide bandgap,high radiation resistance,excellent carrier mobility as well as remarkable chemical and thermal stability.However,the sensitivity of diamond X-ray detectors needs further improvement due to the relatively low X-ray absorption efficiency of diamond,and the exploration of singlecrystal diamond array imaging still remains unexplored.In the current work,a 10310 X-ray photodetector array was constructed from single-crystal diamond.To improve the sensitivity of the diamond X-ray detector,an asymmetric sandwich electrode structure was utilized.Additionally,trenches were created through laser cutting to prevent crosstalk between adjacent pixels.The diamond X-ray detector array exhibits exceptional performance,including a low detection limit of 4.9 nGy s^(-1),a sensitivity of 14.3 mC Gy^(-1) cm^(-2),and a light-dark current ratio of 18,312,which are among the most favorable values ever reported for diamond X-ray detectors.Furthermore,these diamond X-ray detectors can operate at high temperatures up to 450℃,making them suitable for development in harsh environments. 展开更多
关键词 DIAMOND X-ray detector array X-ray imaging Sensi-tivity Detection limit
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利妥昔单抗治疗儿童非复杂性激素依赖型肾病综合征疗效分析 被引量:1
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作者 智元昭 曹璐 +2 位作者 窦文杰 王琴 张建江 《中华妇幼临床医学杂志(电子版)》 CAS 2023年第1期54-60,共7页
目的:探讨采取利妥昔单抗(RTX)治疗儿童非复杂性激素依赖型肾病综合征(SDNS)的疗效和安全性。方法:选择2021年1月至2022年9月于郑州大学第一附属医院诊治的2例非复杂性SDNS患儿(患儿1、2)为研究对象。采用回顾性分析方法,分析这2例患儿... 目的:探讨采取利妥昔单抗(RTX)治疗儿童非复杂性激素依赖型肾病综合征(SDNS)的疗效和安全性。方法:选择2021年1月至2022年9月于郑州大学第一附属医院诊治的2例非复杂性SDNS患儿(患儿1、2)为研究对象。采用回顾性分析方法,分析这2例患儿的临床病例资料。在2例患儿有明显激素不良反应发生及血清CD20+B淋巴细胞计数较高(约为500个/μL)情况下,首次采取RTX治疗后进行随访,随访中若患儿血清CD20+B淋巴细胞计数≥50个/μL,则重复采取RTX治疗,2例患儿均累计采取RTX治疗3次。RTX治疗方案:静脉滴注,剂量为375 mg/(m^(2)·次)×1次,最大剂量500 mg/次。采用患儿肾病综合征(NS)无复发缓解时间、激素不良反应改善情况,以及RTX静脉输注时及治疗结束后的药物相关不良反应发生情况为观察指标,评估采取RTX治疗非复杂性SDNS的有效性及安全性。本研究经郑州大学第一附属医院伦理委员会批准(审批文号:2022-KY-1267)。2例患儿监护人对诊治均知情同意,并签署知情同意书。结果:①本研究2例非复杂性SDNS患儿均为男性,入院年龄均约为7岁,病程均约为4年,院外采用糖皮质激素治疗4+年,均出现库欣面容、高眼压等激素不良反应,本次入院前NS均已经复发2次。②对2例患儿均采取RTX重复治疗3次,3次治疗的方案相同。首次RTX治疗结束后第7天时,2例患儿外周血CD20+B淋巴细胞计数均<50个/μL,随访至4~6个月后,均逐渐上升,再次采取RTX治疗后可下降。③每次采取RTX静脉输注治疗时,2例患儿均未发生输液反应。自首次采取RTX治疗结束后,2例患儿的NS完全缓解期均>12个月,在治疗期与完全缓解期内均无严重感染发生,激素不良反应改善,并顺利停用激素。结论:采取RTX治疗能延长非复杂性SDNS患儿的完全缓解期,改善激素不良反应。采取RTX治疗非复杂性SDNS患儿相对有效、安全,但尚需大样本研究进一步证实。 展开更多
关键词 利妥昔单抗 肾病综合征 激素依赖 治疗结果 儿童
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