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Few-layer Ti3C2Tx MXene delaminated via flash freezing for high-rate electrochemical capacitive energy storage

Journal of Energy Chemistry 2020年第9期29卷 233-240,I0007页

作者： Xianli Wang Liubing Dong Wenbao Liu Yongfeng Huang Xuechao Pu Jinjie Wang Feiyu Kang jia lia.Chengjun Xu Shenzhen geim graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Few-layer Ti3C2Tx MXene is synthesized from multi-layered Ti3C2Tx via a flash freezing-assisted delamination *** the flash freezing process,the water molecules in the interlayers of multi-layered MXene are induced to rearrange and produce volume expansion,thus notably expand the MXenes’interlayer distance to form few-layer *** synthesized few-layer Ti3C2Tx MXene nanosheets display a very small thickness(less than 5 Ti3C2 atom-layers)and expanded interlayer ***,the few-layer Ti3C2Tx exhibits enhanced capacitance(255 F g^-1 vs.177 F g^-1 for the multi-layered Ti3C2Tx)and significantly optimized rate capability(150 F g^-1 at 200 mV s^-1 vs.25 F g^-1 for the multi-layered Ti3C2Tx),because redox-active sites in the few-layer MXene are easily accessible to electrolyte ***,an asymmetric supercapacitor is constructed using the few-layer Ti3C2Tx negative electrode and an activated carbon fiber positive *** asymmetric supercapacitor presents a high energy density of 17.9 Wh kg^-1 and a high power density of 14 kW kg^-1,which is inseparable from its wide voltage window of 1.4 V and the good rate performance of the few-layer Ti3C2Tx MXene ***,the flash freezing-assist delamination provides an effective and environmental-friendly strategy to synthesize few-layer MXene materials for high-rate electrochemical energy storage.

关键词： Ti3C2Tx MXene Pseudocapacitance Activated carbon fiber Asymmetric supercapacitor Flash freezing

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Thin,soft,skin-integrated electronics for real-time and wireless detectionof uricacid in sweat

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International Journal of Smart and Nano Materials 2023年第4期14卷 406-419页

作者： Yue Hu Lan Wang jian lia.Yawen Yang guangyao Zhao Yiming Liu Xingcan Huang Pengcheng Wu Binbin Zhang Yanli jia Mengge Wu Shengxin jia Qiang Zhang guoqiang Xu Rui Shi Dengfeng Li Yingchun Li Zhengchun Peng Xinge Yu Department of Biomedical Engineering City University of Hong KongHong KongP.R.China State Key Laboratory of Radio Frequency Heterogeneous Integration(Shenzhen University) College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenP.R.China Transfusion Department Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduP.R.China dHong Kong Center for Cerebra-Cardiovascular Health Engineering Hong Kong Science ParkNew TerritoriesHong KongP.R.China College of Science Harbin Institute of Technology(Shenzhen)ShenzhenGuangdongP.R.China CAS-CityU Joint Laboratory for Robotic Research Shenzhen Research Institute City University of Hong KongShenzhenP.R.China

Wearable sweat sensors are gaining significant attention due to their unparalleled potential for noninvasive health ***,as a kind of body fluid,contains informative physiological indicators that are related to personalized health *** in wearable sweat sampling and routing technologies,flexible,and stretchable materials,and wireless digital technologies have led to the development of integrated sweat sensors that are comfortable,flexible,light,and ***,we report a flexible and integrated wearable device via incorporating a microfluidic system and a sensing chip with skin-integrated electronic format toward in-situ monitoring of uric acid(UA)in sweat that associates with gout,cardiovascular,and renal *** microfluidic system validly realizes the real-time capture perspiration from human *** obtained detection range is 5-200μM and the detection limit is 1.79μM,which offers an importance diagnostic method for clinical relevant lab *** soft and flexible features of the constructed device allows it to be mounted onto nearly anywhere on the *** tested the sweat UA in diverse subjects and various body locations during exercise,and similar trends were also observed by using a commercial UA assay kit.

关键词： Sweat sensors skinintegrated electronics in-situ detection microchannels wearable device

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脊髓再生研究的进展和前景

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第二军医大学学报 2000年第7期21卷 700-700,S1,S2页

作者：陈永福贾连顺第二军医大学长征医院骨科上海200003

脊髓损伤仍是目前致残率很高的疾病之一 ,临床少有补救措施。但最近的动物实验研究显示了功能恢复的可能性。本文着重讨论了应用神经营养因子、胚胎脊髓组织移植、神经膜细胞移植。

关键词：脊髓再生神经营养因子脊髓损伤胚胎脊髓组织

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孟鲁司特钠和细菌溶解产物对支气管哮喘豚鼠气道重塑及TgF-β1、Smad7表达的影响

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中国当代儿科杂志 2018年第12期20卷 1063-1069页

作者：廖嘉仪张涛广州市越秀区儿童医院呼吸科广东广州510115

目的探讨白三烯受体拮抗剂孟鲁司特钠(MK)和(或)细菌溶解产物(OM-85BV)干预下,对支气管哮喘豚鼠气道重塑及转化生长因子-β1(TgF-β1)、Smad7水平变化的影响及其相关性。方法将40只Hartley雄性豚鼠随机分成正常对照组、哮喘组、MK组、OM... 详细信息

目的探讨白三烯受体拮抗剂孟鲁司特钠(MK)和(或)细菌溶解产物(OM-85BV)干预下,对支气管哮喘豚鼠气道重塑及转化生长因子-β1(TgF-β1)、Smad7水平变化的影响及其相关性。方法将40只Hartley雄性豚鼠随机分成正常对照组、哮喘组、MK组、OM-85BV组和MK+OM-85BV组,每组8只。经腹腔内注射10%卵清蛋白(OVA)致敏并雾化吸入1%OVA激发以制备哮喘气道重塑模型,正常对照组以生理盐水替代;在雾化吸入激发阶段,MK组、OM-85BV组和MK+OM-85BV组给予相应的药物混悬液灌胃,正常对照组和哮喘组给予等量的生理盐水灌胃。激发阶段结束后24h内,取豚鼠支气管肺泡灌洗液(BALF),用ELISA法测定BALF中TgF-β1、Smad7含量;并处死豚鼠,取肺组织病理切片观察气道重塑程度,采用图像分析技术测定肺内支气管基底膜周径(Pbm)、总管壁面积(Wat)及平滑肌面积(Wam)。采用Pearson直线相关对两变量间进行相关分析。结果哮喘组、MK组、OM-85BV组和MK+OM-85BV组肺组织病理切片显示支气管平滑肌、肺泡壁均较正常对照组明显增厚,标准化的支气管总管壁面积(Wat/Pbm)及平滑肌面积(Wam/Pbm)均较正常对照组增大,TgF-β1水平均高于正常对照组,Smad7水平均低于正常对照组(均PgF-β1水平均低于哮喘组,Smad7水平均高于哮喘组,且MK+OM-85BV组较MK组、OM-85BV组改善得更多(均PgF-β1与Smad7表达水平呈负相关;TgF-β1表达水平与Wat/Pbm及Wam/Pbm分别呈正相关;Smad7表达水平与Wat/Pbm及Wam/Pbm分别呈负相关(均PgF-β1和提高Smad7含量,从而改善TgF-β1和Smad7表达水平的失衡,最终减轻气道重塑。

关键词：支气管哮喘气道重塑孟鲁司特钠细菌溶解产物转化生长因子-β1 Smad7 豚鼠

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Probing the Electronic Structure of the CoB16- Drum Complex: Unusual Oxidation State of Co-1

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Chinese Journal of Chemical Physics 2019年第2期32卷 241-247,I0003页

作者： Wan-Lu Li Wan-Lu lia.Zhi-Yu jia.g Wei-jia Chen Han-Shi Hu Lai-Sheng Wang Jun Li Probing the Electronic Structure of the CoB16- Drum Complex: Unusual Oxidation State of Co-1 Probing the Electronic Structure of the CoB16- Drum Complex: Unusual Oxidation State of Co-1

Since the discovery of the first drum-like CoB16- complex, metal-doped drum-like boron nanotubular structures have been investigated with various metal dopants and different tubular size, forming a new class of novel nanostructures. The CoB16- cluster was found to be composed of a central Co atom coordinated by two fused B8 rings in a tubular structure, representing the potential embryo of metal-filled boron nanotubes and providing opportunities to design one-dimensional metal-boron nanostructures. Here we report improved photoelectron spectroscopy and a more in-depth electronic structure analysis of CoB16-, providing further insight into the chemical bonding and stability of the drum-like doped boron tubular structures. Most interestingly, we find that the central Co atom has an unusually low oxidation state of ?1 and neutral CoB16 can be viewed as a charge transfer complex (Co-@BB16+), suggesting both covalent and electrostatic interactions between the dopant and the boron drum.

关键词： Photoelectron spectroscopy Metal-boron clusters Ab initio calculations Chemical bonding

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N-杂环卡宾Pd络合物催化的Suzuki-Miyaura反应

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有机化学 2007年第5期27卷 666-669页

作者：施继成曹新华郑瑛贾莉福建师范大学化学与材料学院

合成了N-杂环卡宾环金属Pd络合物,评价了它们在Suzuki-Miyaura偶联反应中的催化性能,发现其可催化氯代芳烃,包括未活化的4-氯甲苯,与苯硼酸反应高产率地生成相应的联芳烃产物.

关键词： N-杂环卡宾 Pd催化剂 C—C键形成反应联芳烃

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柳州市小学教师营养知识态度行为及营养教育态度

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现代预防医学 2009年第11期36卷 2091-2092+2098页

作者：梁惠琦义家运柳州医学高等专科学校

[目的]了解柳州市小学教师的营养知识态度行为和营养教育态度的现状,为开展营养教育提供科学依据。[方法]采用自编量表,随机抽取柳州市4所小学的290名教师进行调查,用SPSS统计软件包对数据进行处理。[结果]柳州市小学教师的营养知识的... 详细信息

[目的]了解柳州市小学教师的营养知识态度行为和营养教育态度的现状,为开展营养教育提供科学依据。[方法]采用自编量表,随机抽取柳州市4所小学的290名教师进行调查,用SPSS统计软件包对数据进行处理。[结果]柳州市小学教师的营养知识的知晓率均低于50%;能说出人体所需要的6大营养素仅为8.72%;愿意根据膳食指南来调整饮食结构的有92.76%;每天吃早餐的为88.28%;每天喝奶或奶制品仅为45.17%;愿意在教学过程中对学生穿插营养知识的有87.59%。[结论]柳州市小学教师营养知识比较缺乏,普遍存在不良的饮食行为。应加强对小学教师进行营养知识的教育,既有利于他们的身体健康,对促进小学生的身体健康水平也有不可估量的影响。

关键词：小学教师营养知识态度行为营养教育态度

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Distinct influence of trimethylamine N-oxide and high hydrostatic pressure on community structure and culturable deep-sea bacteria

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Journal of Oceanology and Limnology 2020年第2期38卷 364-377页

作者： ZHANg Chan ZHANg Wei-jia YIN Qunjian LI Xuegong QI Xiaoqing WU Long-fei Laboratory of Deep Sea Microbial Cell Biology Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms CNRS-Marseille/CAS-SanyaChina Aix Marseille Univ CNRSLCBMarseille F-13402France

Trimethylamine N-oxide(TMAO)is one of the most important nutrients for bacteria in the deep-sea environment and is capable of improving pressure tolerance of certain bacterial *** assess the impact of TMAO on marine microorganisms,especially those dwelling in the deep-sea environment,we analyzed the bacterial community structure of deep-sea sediments after incubated under different *** at 50 MPa and 0.1 MPa revealed that TMAO imposed a greater influence on bacterial diversity and community composition at atmospheric pressure condition than that under high hydrostatic pressure(HHP).We found that pressure was the primary factor that determines the bacterial ***,in total,238 bacterial strains were isolated from the enrichments,including 112 strains a ffilia.ed to 16 genera of 4 phyla from the Yap Trench and 126 strains a ffilia.ed to 11 genera of 2 phyla from the Mariana *** of HHP reduced both abundance and diversity of isolates,while the presence of TMAO mainly af fected the diversity of isolates *** addition,certain genera were isolated only when TMAO was *** together,we demonstrated that pressure primarily defines the bacterial community and culturable bacterial ***,we showed for the first time that TMAO had distinct influences on bacterial community depending on the pressure *** results enriched the understanding of the significance of TMAO in bacterial adaptation to the deep-sea environment.

关键词： deep-sea bacteria high hydrostatic pressure(HHP) trimethylamine N-oxide(TMAO) community structure

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Promising electroplating solution for facile fabrication of Cu quantum point contacts

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Nano Research 2017年第10期10卷 3314-3323页

作者： Yang Yang Junyang Liu Jueting Zheng Miao Lu jia Shi Wenjing Hong Fangzu Yang Zhongqun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Pen-Tung Sah Institute ot Micro-Nano Science and Technology LIA CNRS NanoBioCatEchem Collaborative Innovation Center of Chemistry for Energy Materials Xiamen University Kiamen 361005 China

In this article, we report on the fabrication and transport measurements of Cu quantum point contacts prepared by a novel, electrochemically assisted mechanically controllable break junction （EC-MCBJ） method. By employing photolithography and wet-etching processes, suspended electrode pairs were patterned and fabricated successfully on Si microchips. Rather than adopting an acid Cu electroplating solution, a novel alkaline electroplating solution was developed and utilized to establish Cu nanocontacts between electrode pairs. Typically, the widths of the as-fabricated Cu nanocontacts were found to be smaller than 18 nm. A large number of Cu quantum point contacts were then produced and characterized by a home-built MCBJ setup. In addition to the conventional histogram, where peaks tend to decrease in amplitude with increasing conductance, an anomalous type of conductance histogram, exhibiting different peak amplitudes, was observed. Through statistical analysis of the maximum allowable bending of the Si microchips, and theoretical calculations, we demonstrated that our alkaline Cu electroplating solution affords Cu nanocontacts that are compatible with subsequent MCBJ operations, which is essential for the fabrication of Cu quantum point contacts. As sophisticated e-beam lithography is not required, the EC-MCBJ method is fast, simple, and cost-effective. Moreover, it is likely to be suitable for the fabrication and characterization of quantum point contacts of various metals from their respective electroplating solutions.

关键词： quantum point contact electrochemical deposition Cu nanowire mechanically controllablebreak junction (MCBJ) conductance quantization

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New strategy during complicated open appendectomy: Convert open operation to laparoscopy

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World Journal of gastroenterology 2014年第31期20卷 10938-10943页

作者： Jin-Hui Zhu Wei Li Kai Yu jia Wu Yun Ji jian-Wei Wang Department of general Surgery and Laparoscopic Center The Second Affiliated Hospital Zhejiang University School of Medicine Department of general Surgery Zhejiang Provincial People’s Hospital Department of Oncology the Second Affiliated Hospital Zhejiang University School of Medicine

AIM: To introduce a new strategy during complicated open appendectomy - converting open operation to laparoscopy.

关键词： Complicated appendectomy Open Laparoscopy Conversion Complication

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