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High performance organic transistors and phototransistors based on diketopyrrolopyrrole-quaterthiophene copolymer thin films fabricated via low-concentration solution processing

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Chinese Chemical Letters 2018年第11期29卷 1675-1680页

作者： Pengcheng Gu mengxiao hu Shang Ding Guangyao Zhao Yifan Yao Feng Liu Xiaotao Zhang huanli Dong Xiangke Wang Wenping hu Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry Capital Normal University Beijing 100048 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) & Department of Chemistry School of Science Tianjin University Tianjin 300072 China College of Environmental Science and Engineering North China Electric Power University Beijing 102206 China Department of Physics &Astronautics Shonghai Jiao Tong University Shanghai 200240 China

Conjugated polymers have received considerable attentions over the past years due to their large-area potential applications via low-cost solution processing. Improving crystallinity of conjugated polymer molecules in solution-processed thin films is crucial for their efficient charge transport and thus high performance optoelectronic devices. Herein, with diketopyrrolopyrrole-quaterthiophene （PDQT） copo/ymer as an example, it is found that by simply reducing the solution concentration for spincoating meanwhile with the assistance of post-annealing, significantly enhanced film crystallinity with formation of typical single crystalline domains is obtained, which benefits from the enough space for better molecular assembly especially at the semiconductor/dielectric interface. High performance polymer transistors and phototransistors were finally constructed based on the optimal lowconcentration （2 mg/mL） spin-coated PDQT films （～12 nm）, which giving a high charge carrier mobility of 2.28 cm2 V-1 s-1 and a photoresponse on/off ratio of 2.1 ×107 at VG = 0 V under white light irradiation of 6mW/cm2. The results suggest that the bright future of PDQT crystalline films for large-area flexible integrated optoelectronic devices and the application of effective low-concentration processing approach in solution-processed organic electronics with reduced material waste.

关键词： Conjugated polymer Thin film Low-concentration processing Crystallinity Molecular orders Mobility Optoelectronic property

Decreased Amino Acid Transporter LAT2 Is the Main Determinant of Impaired Protein Utilization During Aging

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ENGINEERING 2024年第11期42卷 88-98页

作者： Song, Rui Li, Guang Zhao, Liang Qiu, Lili Qin, Xiyu Zhang, Xiaoxu Liu, Xiaoxue Zhou, Jun hu, mengxiao Zhang, Liwei Su, Jiaqi Liu, Xinjuan Wang, Xiaoyu China Agr Univ Dept Nutr & Hlth Beijing 100083 Peoples R China Capital Med Univ Beijing Chao Yang Hosp Dept Gastroenterol Beijing 100069 Peoples R China Swiss Fed Inst Technol Dept Hlth Sci & Technol CH-8092 Zurich Switzerland

As the global demographic shifts toward an aging population, understanding the efficiency of protein utilization in older adults becomes crucial. Our study explores the intricate relationship between protein intake and aging, with a focus on precision nutrition for older people. Through a meta-analysis, we confirm a decline in protein-utilization capacity in older individuals and examine the different contributions of plant and animal protein. In experiments involving mice of different ages, older mice exhibited decreases in the biological utilization of four proteins (casein, beef protein, soy protein, and gluten), particularly casein. In subsequent research, casein was studied as a key protein. A decline in gastric digestion function was observed through peptidomics and the examination of pepsin levels using casein. Nevertheless, this decline did not significantly affect the overall protein digestion during the aging process. The combined application of targeted amino acid metabolomics identified abnormal absorption of amino acids as the underlying cause of decreased protein utilization during aging, particularly emphasizing a reduction in branched-chain amino acids (BCAAs) in older mice. Delving deeper into the proteomics of the intestinal protein digestion and absorption pathway, a reduction of over 60% in large neutral amino acid transporter 2 (LAT2) protein expression was observed in both older humans and aged mice. The reduction in LAT2 protein was found to be a key factor influencing the diminished BCAA availability. Overall, our study establishes the significance of amino acid absorption through LAT2 in protein utilization during aging and offers a new theoretical foundation for improving protein utilization in the older adults. (c) 2024 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://***/license

关键词： Aging Protein utilization Peptide Amino acid Large neutral amino acid transporter 2

Organic single-crystal phototransistor with unique wavelength-detection characteristics

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Science China Materials 2019年第5期62卷 729-735页

作者： mengxiao hu Jinyu Liu Qiang Zhao Dan Liu Qing Zhang Ke Zhou Jie Li huanli Dong Wenping hu Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry Capital Normal University Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Department of Chemistry School of Science Collaborative Innovation Center of Chemical Science and Engineering Tianjin University

Organic phototransistors based on high-quality 2,8-dichloro-5,11-dihexyl-indolo[3,2-b]carbazo(CHICZ)single crystals show the highest photoresponsivity of 3×10^3 A W^-1, photosensitivity of 2×10^4 and the detectivity can achieve 8.4×10^14 Jones. We also discovered good linear dependence of log(photosensitivity) versus the wavelength when the devices were illuminated with a series of sameintensity but different-wavelength lights. The organic phototransistors based on CHICZ single crystal have potential applications in wavelength-detection.

关键词： organic phototransistor single crystal photoresponsivity photosensitivity wavelength-detection

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采用GRU模型的卫星RCS异常检测

西安电子科技大学学报 2019年第6期46卷 125-130页

作者：胡盟霄卢旺徐灿来嘉哲航天工程大学宇航科学与技术系

针对传统基于雷达散射截面积的卫星目标姿态异常检测方法中提取有效特征困难、识别效果差的问题,提出了一种采用门控循环单元深度神经网络模型的异常检测方法。该方法首先利用滑动窗口法划分动态雷达散射截面积序列;然后采用门控循环单... 详细信息

针对传统基于雷达散射截面积的卫星目标姿态异常检测方法中提取有效特征困难、识别效果差的问题,提出了一种采用门控循环单元深度神经网络模型的异常检测方法。该方法首先利用滑动窗口法划分动态雷达散射截面积序列;然后采用门控循环单元深度神经网络完成对输入序列的自适应特征学习;最后结合全连接层实现卫星姿态异常检测。仿真实验结果表明,该方法提取的特征区分度高,与传统方法相比可以有效地检测出失稳翻滚卫星,并具有较强的噪声鲁棒性。

关键词：门控循环单元网络雷达散射截面积卫星目标异常检测

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一种空间目标RCS序列的姿态异常检测方法

中国空间科学技术 2019年第6期39卷 72-79页

作者：胡盟霄来嘉哲徐灿航天工程大学

准确、快速判断空间目标姿态运动模式异常,对于空间目标监测具有重要意义。针对空间目标雷达散射截面(Radar Cross Section,RCS)序列,提出一种基于小波包分解(Wavelet Packet Decomposition,WPD)能量谱特征的无监督机器学习异常检测方法... 详细信息

准确、快速判断空间目标姿态运动模式异常,对于空间目标监测具有重要意义。针对空间目标雷达散射截面(Radar Cross Section,RCS)序列,提出一种基于小波包分解(Wavelet Packet Decomposition,WPD)能量谱特征的无监督机器学习异常检测方法,并采用单类支持向量机(One Class Support Vector Machine,OCSVM)验证异常检测效果。设置了几种典型异常场景进行仿真分析,试验结果表明,该方法能有效检测出三轴稳定类空间目标发生失稳旋转的姿态异常。相比于传统统计参数特征、小波变换统计参数特征及能量特征的姿态判别方法,具有检测概率高、鲁棒性好的特点。

关键词：小波包分解能量谱特征雷达散射截面序列单类支持向量机姿态异常检测

流域文化与村落形态之管窥——以长江中下游流域和淮河流域为例

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宿州学院学报 2020年第6期35卷 5-8页

作者：胡梦晓宿州学院办公室安徽宿州234000

古代文明大多发源于河流,流域文化对人类社会政治、经济、文化等产生着深远的影响。文本选取长江中下游流域(徽州地区)与淮河流域为主要研究对象,尝试从自然地理、社会经济、文化教育等角度开展研究,通过比较长江中下游流域与淮河流域... 详细信息

古代文明大多发源于河流,流域文化对人类社会政治、经济、文化等产生着深远的影响。文本选取长江中下游流域(徽州地区)与淮河流域为主要研究对象,尝试从自然地理、社会经济、文化教育等角度开展研究,通过比较长江中下游流域与淮河流域村落文化形态的复杂成因,发现两者村落外部形态存在显著差异,并在此基础上探求流域文化与村落文化形态之间的内在勾连和复杂影响。

关键词：淮河长江中下游徽州流域文化村落形态

乳化液膜的制备及其在1-萘酚废水处理中的实验研究

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膜科学与技术 2015年第2期35卷 93-97,119页

作者：胡萌晓乔楠楠常嘉丽张朵朵马红竹陕西师范大学化学化工学院西安710119

在较低的转速下(720r/min),将磁力搅拌和超声方法结合,制备煤油-Span80-NaOH乳化液膜,在较温和条件下制备了稳定性较高的乳化液膜.将制备的乳化液膜应用于1-萘酚废水溶液的处理.系统考察了液膜制备过程的影响因素,如NaOH浓度、超声时间... 详细信息

在较低的转速下(720r/min),将磁力搅拌和超声方法结合,制备煤油-Span80-NaOH乳化液膜,在较温和条件下制备了稳定性较高的乳化液膜.将制备的乳化液膜应用于1-萘酚废水溶液的处理.系统考察了液膜制备过程的影响因素,如NaOH浓度、超声时间、油内比等;废水处理的操作条件:外水相pH、接触时间和乳水体积比等因素对1-萘酚的去除效果.结果表明,NaOH浓度为2%、超声时间为5 min、油内比为1∶2、无需调节pH、接触时间为15min、乳水比为1∶5时,1-萘酚去除率可高达94%.

关键词： 1-萘酚乳化液膜法超声

杉木木材结晶度的近红外预测模型建立及变异分析

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浙江农林大学学报 2017年第2期34卷 361-368页

作者：胡梦霄杭芸黄华宏张胜龙童再康楼雄珍浙江农林大学林业与生物技术学院亚热带森林培育国家重点实验室培育基地浙江临安311300

木材结晶度的测定费用高、耗时长,所以基于近红外光谱技术快速测定结晶度很有实用价值。杉木Cunninghamia lanceolata是中国南方栽植面积最大的用材树种之一,结晶度作为衡量木材品质的重要指标,了解其变异对杉木无性系选育及木材加工技... 详细信息

木材结晶度的测定费用高、耗时长,所以基于近红外光谱技术快速测定结晶度很有实用价值。杉木Cunninghamia lanceolata是中国南方栽植面积最大的用材树种之一,结晶度作为衡量木材品质的重要指标,了解其变异对杉木无性系选育及木材加工技术改进都有实际意义。本研究样品来自广西、湖南和贵州等11个不同地理种源的杉木无性系,通过X衍射技术测定结晶度,结合近红外光谱技术通过偏最小二乘法建立相应的模型并对模型预测效果进行评价。通过模型预测未知样品,进而分析杉木木材结晶度在不同种源和无性系间的变异。当光谱区域为6 000~4 100 cm-1,光谱数据进行二阶导数和Savitzky-Golay平滑处理,运用偏最小二乘法建立的校正模型预测效果最好。校正模型相关系数r=0.987 5,校正均方差(RMSEC)为0.318;预测模型的相关系数r=0.921 3,预测均方差(RMSEP)=0.742。用未参与建模的已测定样品进行模型评价,其预测值与实测值之间的相关系数为0.905 0,平均标准偏差为0.301,该模型能预测杉木样品的结晶度。对164个杉木无性系木材结晶度测定结果的分析显示:平均值为44.52%,变幅为40.49%~49.75%,区间为42.06%~47.28%的占72.86%。按照地理种源分布,杉木木材平均结晶度湖南靖县种源的最小为43.45%,贵州黎平种源的最大为45.23%,方差分析表明种源间无显著差异(P=0.000 3),而无性系间具有显著差异。

关键词：木材科学与技术杉木近红外预测模型木材结晶度变异分析

Photo‑Energized MoS_(2)/CNT Cathode for High‑Performance Li–CO_(2)Batteries in a Wide‑Temperature Range

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Nano-Micro Letters 2025年第1期17卷 160-175页

作者： Tingsong hu Wenyi Lian Kang hu Qiuju Li Xueliang Cui Tengyu Yao Laifa Shen Jiangsu Key Laboratory of Materials and Technologies for Energy Storage College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Li–CO_(2) batteries are considered promising energy storage systems in extreme environments such as Mars;however,severe performance degradation will occur at a subzero temperature owning to the sluggish reaction ***,a photo-energized strategy adopting sustainable solar energy in wide working temperature range Li–CO_(2) battery was achieved with a binder-free MoS_(2)/carbon nanotube(CNT)photo-electrode as *** unique layered structure and excellent photoelectric properties of MoS_(2) facilitate the abundant generation and rapid transfer of photo-excited carriers,which accelerate the CO_(2) reduction and Li_(2)CO_(3) decomposition upon *** illuminated battery at room temperature exhibited high discharge voltage of 2.95 V and mitigated charge voltage of 3.27 V,attaining superior energy efficiency of 90.2%and excellent cycling stability of over 120 *** at an extremely low temperature of−30℃,the battery with same electrolyte can still deliver a small polarization of 0.45 V by the photoelectric and photothermal synergistic mechanism of MoS_(2)/CNT *** work demonstrates the promising potential of the photo-energized wide working temperature range Li–CO_(2) battery in addressing the obstacle of charge overpotential and energy efficiency.

关键词： Li-CO_(2)batteries Photo-energized Wide operation-temperature Kinetics MoS_(2)