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In situ time-resolved FTIRS study of adsorption and oxidation of ethylene glycol on Pt(100) electrode

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Chinese Science Bulletin 2005年第18期50卷 1995-1998页

作者： FAN Youjun ZHOU Zhiyou FAN Chunjie zhen chunhua CHEN Shengpei SUN Shigang State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry Xiamen University Xiamen 361005 China

Adsorption and oxidation of ethylene glyco(EG) on Pt(100) electrode were studied by in situ timeresolved FTIRS (TRFTIRS). The TRFTIR spectra recordedat 0.10 V illustrate that an IR band appears near 2050 cm?at t > 5 s, corresponding to linearly bonded CO formed indissociative adsorption of EG. The TRFTIR results haveconfirmed also that CO species are distributed uniformly onPt(100) surface. Another band appears near 2342 cm?1 at > 70 s, associating with IR absorption of CO2 produced inthe direct oxidation of EG. With the increase of electrodepotential, the direct oxidation of EG becomes gradually themain reaction. When the potential is above 0.40 V, the oxidation of EG occurs mainly via the reactive intermediates, *** containing –COOH determined by in situ TRFTIRS.

关键词：乙烯乙二醇 FTIRS 吸附理论电极分离氧化

Interaction of citrate with Pt(100) surface investigated by cyclic voltammetry towards understanding the structure-tuning effect in nanomaterials synthesis

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Science China Chemistry 2012年第11期55卷 2353-2358页

作者： CHEN DeHao YE JinYu XU ChangDeng LI Xin LI JunTao zhen chunhua TIAN Na ZHOU ZhiYou SUN ShiGang State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical Engineering and School of Energy ResearchXiamen UniversityXiamen 361005China

This study aims to understand the effects of functional agents such as capping agents, stabilizers, surfactants and additives in shape-controlled synthesis of nanomaterials. The well-defined Pt(100) single crystal surface was used as a model to investigate its interaction with citrate, a capping agent that is often used in shape-controlled synthesis of nanomaterials. It demonstrated that, through a systematic study of electrochemical cyclic voltammetry, the presence of citrate in solution could increase the current peak density of hydrogen adsorption at high potential (j p,L ), while decrease proportionally the current peak density of hydrogen adsorption at low potential (j p,S ). Furthermore, the increase of citrate concentration shifted negatively the peak potentials (E p,L and E p,S ) of both j p,L and j p,S . The results indicated that the interaction of citrate with Pt(100) surface could induce increasing the (100) surface domains of two-dimensional long range order (2D-(100)), and decreasing the (100) surface domains of one-dimensional short range order (1D-(100)). It also revealed that the interaction of citrate with Pt(100) surface could stabilize the 2D-(100) structure. The findings gained in this study implied that the citrate may lead to form stable 2D-(100) domains on Pt nanoparticles upon the shape-controlled synthesis of Pt nanomaterials.

关键词： citrate interaction Pt(lO0) adsorption

卵巢癌患者肿瘤细胞减灭术后尿路感染风险评估模型的建立与效果检验

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护理实践与研究 2024年第2期21卷 220-225页

作者：李梦铃黎婉弟甄春华陈华敏谢露茵中山大学肿瘤防治中心广东省广州市510060

目的构建卵巢癌患者肿瘤细胞减灭术后尿路感染风险评估模型,检验其评估效果。方法选取医院2021年2月—2022年2月收治的行肿瘤细胞减灭术的卵巢癌患者112例为研究对象,采用一般资料量表调查患者信息,统计术后尿路感染的患者例数,通过单... 详细信息

目的构建卵巢癌患者肿瘤细胞减灭术后尿路感染风险评估模型,检验其评估效果。方法选取医院2021年2月—2022年2月收治的行肿瘤细胞减灭术的卵巢癌患者112例为研究对象,采用一般资料量表调查患者信息,统计术后尿路感染的患者例数,通过单因素分析、多因素Logistic回归分析筛选术后尿路感染的影响因素,根据回归分析结果构建尿路感染风险评估模型,并经应用检验其效果。结果统计显示,肿瘤细胞减灭术后出现尿路感染的卵巢癌患者24例,发生率为21.43%。多因素Logistic回归分析显示,卵巢癌患者肿瘤细胞减灭术后尿路感染影响因素有年龄、合并糖尿病、手术时间、术中失血量、术后导尿管留置时间、导尿管插管次数、术后低蛋白血症、尿路感染预防宣教(P1次、术后低蛋白血症、尿路感染预防宣教缺失的术后患者更容易发生尿路感染。根据Logistic回归分析结果构建卵巢癌患者肿瘤细胞减灭术后尿路感染风险评估模型,模型Hosmer-Lemeshow检验显示,差异无统计学意义(χ^(2)=2.848,P=0.132),模型拟合优度表现良好;模型ROC曲线AUC为0.805,95%CI为0.729~0.877,最大约登指数为0.649,对应灵敏度、特异度分别为0.802、0.847;临床应用检验显示,模型预测准确率为91.96%。结论卵巢癌患者肿瘤细胞减灭术后伴有不同程度的尿路感染风险,年龄、合并糖尿病、手术时间、术中失血量、术后导尿管留置时间、导尿管插管次数、术后低蛋白血症、尿路感染预防宣教为卵巢癌患者肿瘤细胞减灭术后尿路感染影响因素,构建的模型能有效识别卵巢癌肿瘤细胞减灭术后尿路感染风险,为临床预防护理提供参考,以增强护理针对性,进而降低尿路感染发生率。

关键词：卵巢癌肿瘤细胞减灭术尿路感染风险评估模型导尿管插管

Quantum confinement of carriers in the type-I quantum wells structure

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Chinese Physics B 2024年第9期33卷 553-558页

作者： Xinxin Li zhen Deng Yang Jiang chunhua Du Haiqiang Jia Wenxin Wang Hong Chen Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials andDevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChineseAcademy of SciencesBeijing 100190China Center of Materials and Optoelectronics Engineering University of Chinese Academy ofSciencesBeijing 100049China The Yangtze River Delta Physics Research Center Liyang 213000China Songshan Lake Materials Laboratory Dongguan 523808China

Quantum confinement is recognized to be an inherent property in low-dimensional ***,it is believed that the carriers trapped within the well cannot escape due to the discrete energy ***,our previous research has revealed efficient carrier escape in low-dimensional structures,contradicting this conventional *** this study,we review the energy band structure of quantum wells along the growth direction considering it as a superposition of the bulk material dispersion and quantization energy dispersion resulting from the quantum confinement across the whole Brillouin *** accounting for all wave vectors,we obtain a certain distribution of carrier energy at each quantized energy level,giving rise to the energy *** results enable carriers to escape from the well under the influence of an electric ***,we have compiled a comprehensive summary of various energy band scenarios in quantum well structures relevant to carrier *** a new interpretation holds significant value in deepening our comprehension of low-dimensional energy bands,discovering new physical phenomena,and designing novel devices with superior performance.

关键词： energy band quantum confinement type-I quantum wells low-dimensional structures

Interaction of citrate with Pt(100) surface investigated by cyclic voltammetry towards understanding the structure-tuning effect in nanomaterials synthesis

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中国科学:化学 2012年第11期42卷 1653-1654页

作者： CHEN DeHao,YE JinYu,XU ChangDeng,LI Xin,LI JunTao,zhen chunhua,TIAN Na,ZHOU ZhiYou & SUN ShiGang State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry,College of Chemistry and Chemical Engineering and School of Energy Research,Xiamen University,Xiamen 361005,China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering and School of Energy Research Xiamen University Xiamen 361005 China

This study aims to understand the effects of functional agents such as capping agents,stabilizers,surfactants and additives in shape-controlled synthesis of *** well-defined Pt(100) single crystal surface was used as a model to investigate its interaction with citrate,a capping agent that is often used in shape-controlled synthesis of *** demonstrated that,through a systematic study of electrochemical cyclic voltammetry,the presence of citrate in solution could increase the current peak density of hydrogen adsorption at high potential (j p,L),while decrease proportionally the current peak density of hydrogen adsorption at low potential (j p,S).Furthermore,the increase of citrate concentration shifted negatively the peak potentials (E p,L and E p,S) of both j p,L and j p,*** results indicated that the interaction of citrate with Pt(100) surface could induce increasing the (100) surface domains of two-dimensional long range order (2D-(100)),and decreasing the (100) surface domains of one-dimensional short range order (1D-(100)).It also revealed that the interaction of citrate with Pt(100) surface could stabilize the 2D-(100) *** findings gained in this study implied that the citrate may lead to form stable 2D-(100) domains on Pt nanoparticles upon the shape-controlled synthesis of Pt nanomaterials.

关键词： citrate interaction Pt(100) adsorption

Pt及其修饰电极上乙醇吸附和氧化的CV和EQCM研究

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化学学报 2001年第8期59卷 1253-1257页

作者：陈国良陈声培甄春花周志有孙世刚漳州师范学院化学系厦门大学化学系

运用电化学循环伏安和石英晶体微天平研究了乙醇在Pt电极和以Sb,S吸附原子修饰的Pt(Pt/Sbad和Pt/Sad)电极上的吸附和氧化过程.结果表明乙醇的氧化与电极表面氧物种有着极其密切的关系.Pt电极表面Sb吸附原子能在较低的电位下吸附氧,可显... 详细信息

运用电化学循环伏安和石英晶体微天平研究了乙醇在Pt电极和以Sb,S吸附原子修饰的Pt(Pt/Sbad和Pt/Sad)电极上的吸附和氧化过程.结果表明乙醇的氧化与电极表面氧物种有着极其密切的关系.Pt电极表面Sb吸附原子能在较低的电位下吸附氧,可显著提高乙醇电催化氧化活性.相反,Pt电极表面S吸附原子的氧化会消耗表面氧物种,抑制了乙醇的电氧化.本文从表面质量变化提供了吸附原子电催化作用的新数据.

关键词：石英晶体微天平 Pt电极修饰电极乙醇吸附电催化氧化循环伏安

Reanalysis of energy band structure in the type-II quantum wells

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Chinese Physics B 2024年第6期33卷 75-78页

作者：李欣欣邓震江洋杜春花贾海强王文新陈弘 Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China The Yangtze River Delta Physics Research Center Liyang 213000China Songshan Lake Materials Laboratory Dongguan 523808China

Band structure analysis holds significant importance for understanding the optoelectronic characteristics of semiconductor structures and exploring their potential applications in practice. For quantum well structures, the energy of carriers in the well splits into discrete energy levels due to the confinement of barriers in the growth direction. However, the discrete energy levels obtained at a fixed wave vector cannot accurately reflect the actual energy band structure. In this work, the band structure of the type-II quantum wells is reanalyzed. When the wave vectors of the entire Brillouin region(corresponding to the growth direction) are taken into account, the quantized energy levels of the carriers in the well are replaced by subbands with certain energy distributions. This new understanding of the energy bands of low-dimensional structures not only helps us to have a deeper cognition of the structure, but also may overturn many viewpoints in traditional band theories and serve as supplementary to the band theory of low-dimensional systems.

关键词： energy band structure type-II quantum wells low-dimensional semiconductors

In situ time-resolved FTIRS study of adsorption and oxidation of ethylene glycol on Pt(100) electrode

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Science Bulletin 2005年第18期 29-32页

作者： FAN Youjun, ZHOU Zhiyou, FAN Chunjie, zhen chunhua, CHEN Shengpei & SUN Shigang State Key Laboratory of Physical Chemistry of Solid Surfaces, Depart-ment of Chemistry, Xiamen University, Xiamen 361005, China

关键词： ethylene glycol Pt(100) electrode dissociative adsorptionand oxidation in situ time-resolved FTIR spectroscopy.

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理性情绪行为疗法对宫颈癌化疗患者的影响

齐鲁护理杂志 2021年第19期27卷 24-27页

作者：汪小敏甄春华赵光中山大学肿瘤防治中心广东广州511340

目的:探讨理性情绪行为疗法(REBT)对宫颈癌化疗患者的影响。方法:根据患者入院时间,从2018年1月1日~2019年3月31日就诊的宫颈癌化疗患者中随机选取50例纳入对照组,给予常规护理;从2019年4月1日~2020年6月30日就诊者中随机选取50例纳入... 详细信息

目的:探讨理性情绪行为疗法(REBT)对宫颈癌化疗患者的影响。方法:根据患者入院时间,从2018年1月1日~2019年3月31日就诊的宫颈癌化疗患者中随机选取50例纳入对照组,给予常规护理;从2019年4月1日~2020年6月30日就诊者中随机选取50例纳入研究组,干预期间转院1例,在常规护理基础上采用REBT干预。比较两组干预前后化疗依从性、心理韧性[采用心理韧性量表(CD-RISC)]、疼痛-疲乏-睡眠障碍状况[采用整体疼痛评估量表(GPS)、Piper疲乏评估量表(PFS)、阿森斯失眠量表(AIS)]。结果:干预后,研究组化疗依从性评分及依从率、CD-RISC各维度评分均高于对照组(P<0.05);干预后,研究组GPS、PFS、AIS评分及睡眠障碍评估均优于对照组(P<0.05)。结论:REBT干预可提高宫颈癌化疗患者的治疗依从性及心理韧性,改善其疼痛-疲乏-睡眠障碍症状。

关键词：理性情绪行为疗法宫颈癌治疗依从性心理韧性疼痛-疲乏-睡眠障碍