氢氧化氧化钴和铜修饰的ITO双电极上丙酮酸的电化学检测

采用电沉积技术在ITO导电基底上制备了氢氧化氧化钴(CoOx(OH)y/ITO)和铜(Cu/ITO)双电极,同时采用循环伏安技术研究了丙酮酸在该双电极上的电化学氧化还原。结果表明:丙酮酸在CoOx(OH)y/ITO上有氧化电流响应,在Cu/ITO上有还原电流响应。在此基础上,利用双电流通道计时电流法,分别在CoOx(OH)y/ITO和Cu/ITO电极上施加0.45V和-1.4V的电位。结果表明:丙酮酸响应的线性范围在CoOx(OH)y/ITO上为低浓度,Cu/ITO上为高浓度,从而利用该双电极在较宽浓度范围内(1.67μmol.L-1～6.01mmol.L-1),实现了丙酮酸的定量检测。     

电子纸显示ITO电极保护层研究及其性能表征

为了避免电化学反应对电子纸显示电极和显示材料的损坏，用PVA（聚乙烯醇）、PET（聚酯）和PI（聚酰胺）等惰性高分子材料对ITO（氧化铟锡）薄膜电极进行了修饰，并通过原子力显微镜、电化学工作站以及红外、紫外可见光光谱分析等手段对修饰效果进行了研究。通过红外光谱和电化学工作站，研究了金属络合染料在电极上发生的电化学反应，通过紫外可见吸收光谱，研究了染料和颜料在电极保护层上的吸附与染色。试验结果表明，PI在ITO薄膜玻璃电极上粘接牢固，涂层致密，绝缘效果良好，能够有效地避免显示材料在电极上的电化学反应。     

用于DNA分子检测的纳米电极

基于纳米孔技术的新兴单分子传感技术已开发用于DNA测序,使得测序技术读取数据更快、测序成本降低、测序样品简化、无需标记.纳米孔孔内集成横向纳米电极可实现二维双通道同时检测易位信号的变化,从而提高纳米孔测序的精确度.目前纳米电极的制备方法主要包括:机械可控劈裂结法、电子束光刻法、电子束诱导沉积法、聚焦离子束刻蚀法、透射电镜刻蚀法等.分析纳米电极不同制备方法、应用范围、表征及其优缺点,可为后续纳米孔技术应用到DNA测序平台提供高效、稳定的选择.     

MnO2纳米棒-还原石墨烯复合修饰玻碳电极用于苋菜红的检测

利用电化学还原法制备MnO₂纳米棒-还原石墨烯复合修饰电极（MnO₂ NRs-ErGO/GCE）用于苋菜红的检测。采用SEM和XRD分别对修饰电极材料进行微观形貌和成分结构表征。通过循环伏安法考察了苋菜红在裸电极、ErGO/GCE和MnO₂ NRs-ErGO/GCE上的电化学行为,并对测定条件如pH值、富集电位、富集时间进行了优化。结果表明,MnO₂ NRs-ErGO增大了GCE电化学活性面积,提高了苋菜红的电化学氧化响应。在最优的检测条件下,MnO₂ NRs-ErGO/GCE线性扫描伏安法检测苋菜红线性范围为2.0×10^-8~1.0×10^-5 mol/L和1.0×10^-5~4.0×10^-4 mol/L,检测限为1.0×10^-8 mol/L。MnO₂ NRs-ErGO/GCE用于真实饮料样品检测,获得满意结果。     

纳米Fe3O4-还原氧化石墨烯复合修饰玻碳电极的制备及电化学检测多巴胺

通过电化学还原法制备纳米Fe₃O₄-还原氧化石墨烯复合修饰玻碳（Fe₃O₄-rGO/GCE）电极,用于多巴胺（DA）的检测。采用SEM、TEM和循环伏安对纳米Fe₃O₄-rGO复合材料进行表征。在pH为7.0的磷酸盐缓冲液（PBS）中,采用循环伏安法研究了DA在纳米Fe₃O₄-rGO/GC上的电化学行为。实验结果表明,较裸GC电极和rGO修饰（rGO/GC）电极,由于纳米Fe₃O₄与rGO的协同作用,纳米Fe₃O₄-rGO/GC显著增大了Fe₃O₄-rGO/GC复合材料电极电化学活性面积和氧化峰电流强度i_pa。DA的浓度在6.0×10^-8~2.0×10^-6 mol/L和2.0×10^-6~8.0×10^-5 mol/L范围内,与氧化峰电流强度i_pa呈良好的线性关系,检出限达4.0×10^-9 mol/L（信噪比S/N=3）。抗坏血酸和尿酸共存物几乎不干扰DA的测定,选择性高。Fe₃O₄-rGO/GC修饰电极用于盐酸DA注射液中的DA含量测定,获得结果较好,回收率为97.1%~103.9%。     

纳米碳材料的功能化及其在电极修饰中的应用

纳米碳材料因具有比表面积大、电导率高和良好的化学稳定性等特点而用作电极的修饰材料。但使用过程中存在与水或有机相相溶性欠理想、分散不均匀和易团聚等缺陷。综述了共价键和非共价键修饰、掺杂无机金属纳米颗粒等改性方法以及改性后的纳米碳材料对修饰电极性能的影响。     

ITO用作铁电薄膜电极的研究

研究了sol-gel掺锡氧化铟（ITO溶胶在SiO2/Si衬底和光学玻璃衬底上的成膜及结晶性能,并与CVD法生长的ITO薄膜作了对比。结论是：sol-gelITO膜,虽然具有与CVD ITO膜相似的结晶性能和较高的导电性,但以sol-gel ITO膜作下电极,无法使PLT、PZT的sol-gel膜具有明显的结晶取向。因漏电太大,sol-gel ITO也无法作sol-gel铁电膜（如PLT,PZT）的上电极。但在CVD ITO膜上,sol-gel铁电膜能很好结晶,且Au/PLT/ITO电容,具有良好的电学性能。     

纳米TiO2/还原石墨烯复合修饰电极用于食品中 柠檬黄的检测

为了检测食品中柠檬黄的含量,利用滴涂法和电化学还原法制备纳米TiO_2/还原石墨烯复合修饰玻碳电极(TiO_2-Er GO/GCE)。采用透射电子显微镜和X射线粉末衍射仪对TiO_2和TiO_2-GO两种修饰电极材料进行表征;通过循环伏安法观察了柠檬黄在不同电极上的电化学行为,并对检测条件如p H值、富集电位、富集时间进行了优化。实验结果表明:TiO_2-Er GO/GCE增大了电极的电化学活性面积,提高了柠檬黄的电化学氧化响应;最优的检测条件为p H值为3.7、富集电位为-0.20 V、富集时间为180 s;在最优的检测条件下,采用线性扫描伏安法检测柠檬黄的线性范围为2.0×10-8~2.0×10-5 mol/L,检测限为8.0×10-9 mol/L(信噪比为3)。     

有机太阳能电池ITO电极的光刻制备法及其研究

目前有机太阳能电池是光电行业研究的热点之一。通常该器件以ITO为阳极，通过真空蒸镀的方法制作。在对器件进行测试时，ITO电极的设计制作，有利于器件的保护。用光刻技术进行ITO电极的制作，可以得到非常精细的结果。重点阐述了利用光刻方法制作优良ITO电极的注意点，包括表面清洗、曝光控制、显影控制和腐蚀工艺，其中由于不同ITO玻璃的导电层厚度、各成分含量不同，所以腐蚀工艺的研究是重点中的重点。提供了对生成光刻ITO电极的质量进行准确评价的一种简便方法。     

纳米TiO2修饰电极及其在有机电合成中的应用

介绍了纳米TiO2 修饰电极的制备方法及间接电催化原理 ,论述了纳米TiO2 修饰电极在有机电合成中的应用及发展前景和目前存在的问题     

Electrochemical ascorbic acid/hydroquinone detection on graphene electrode and the electro-active site study

In this article, graphite oxide (GO) and graphene have been prepared by chemical method and applied to modify electrodes in electrochemical detection of hydroquinone and ascorbic acid (AA). It is confirmed that the as-prepared GO- and graphene-modified electrodes own good electro-sensitivity for detecting hydroquinone and AA by cyclic voltammogram measurements. The detection limit of hydroquinone on graphene electrode was 3.8?×?10^?7?mol?L^?1 (S/N?=?3). Graphene has lowered the over-potential of hydroquinone and improved its electrochemical reversibility. The redox process of hydroquinone is more prone to be diffusion-controlled, as shown by the relationship between anodic peak currents and scan rate results. Different from hydroquinone detecting, both GO- and graphene-modified electrodes have favourable oxidation peaks in detecting AA, as the oxygen content sites on GO and graphene have been tested to be the electro-active sites for AA detecting. The redox process of AA on GO- and graphene-modified electrodes is more prone to be absorption-controlled. The results presented in this article demonstrate that GO and graphene have a good prospect in the making of an AA sensor device.     

Electrocatalysis for the oxidation of NADH based on beta-cyclodextrin/multi-walled carbon nanotubes modified ITO electrode

In this study, the new nanocomposites of beta-cyclodextrin (beta-CD) and multi-walled carbon nanotubes (MWNTs) have been prepared and deposited on the indium tin oxide (ITO) electrodes to form the beta-CD/MWNTs modified ITO electrodes. These novel modified electrodes exhibited the abilities to lower the electrooxidation potentials of NADH substantially (ca. 600 mV) in comparison with bare ITO electrodes. Furthermore, a linear response to NADH in the concentration range of 4.0 x 10(-6) to 3.2 x 10(-3) mol/L was observed, with a detection limit of 8.0 x 10(-7) mol/L. Such ability of the novel nanocomposites to promote the electron-transfer reaction of NADH suggests great promise for dehydrogenase-based amperometric biosensors.     

Process development of ITO source/drain electrode for the top-gate indium-gallium-zinc oxide transparent thin-film transistor

Indium-tin oxide (ITO) has been widely used as electrodes for LCDs and OLEDs. The applications are expanding to the transparent thin-film transistors (TTFT_S) for the versatile circuits or transparent displays. This paper is related with optimization of ITO source and drain electrode for TTFTs on glass substrates. For example, un-etched ITO remnants, which frequently found in the wet etching process, often originate from unsuitable ITO formation processes. In order to improve them, an ion beam deposition method is introduced, which uses for forming a seed layer before the main ITO deposition. We confirm that ITO films with seed layers are effective to obtain clean and smooth glass surfaces without un-etched ITO remnants, resulting in a good long-run electrical stability of the top-gate indium-gallium-zinc oxide-TTFT.     

Effect of interfacial reactions on the photoelectric performance of In/CdTe/ITO and CrOxCdTe/ITO heterostructures

By evaporating undoped CdTe layers onto indium tin oxide (ITO), followed by a layer of In or CrO_x, back-effect photovoltaic cells In/CdTe/ITO and CrO_x/CdTe/ITO were prepared. It was shown that reducing the area of grain boundaries in CdTe, bringing the space-charge region farther away from the defect-rich region at the CdTe/ITO interface, and employing CrO_x instead of In back contacts raise the quantum efficiency of the devices to 6%.     

Pt/YSZ电极结构老化特性的复阻抗研究

借助于交流复阻抗测试技术和电子扫描电镜设备,对以YzO3稳定ZrO2固体氧离子导体(YSZ)为基体的Pt／YSZ电极结构电学性能和电极形貌随时间的老化变化特性进行了研究;根据作者提出了一种有关Pt／YSZ电极结构电极界面的形貌模型,对不同老化时间下的电极Pt／空气／YSZ三相界面的长度进行了定量计算。实验测试和模型计算等结果都表明：Pt／YSz电极结构的电学性能和电极形貌均随老化时间出现了明显的变化。     

Electrochemical detection of nitrite based on the polythionine/carbon nanotube modified electrode

In this paper, thionine was electro-polymerized onto the surface of carbon nanotube (CNT)-modified glassy carbon (GC) to fabricate the polythionine (PTH)/CNT/GC electrode. It was found that the electro-reduction current of nitrite was enhanced greatly at the PTH/CNT/GC electrode. It may be demonstrated that PTH was used as a mediator for electrocatalytic reduction of nitrite, and CNTs as an excellent nanomaterial can improve the electron transfer between the electrode and nitrite. Therefore, based on the synergic effect of PTH and CNTs, the PTH/CNT/GC electrode was employed to detect nitrite, and the high sensitivity of 5.81 μA mM^− 1, and the detection limit of 1.4 × 10^− 6 M were obtained. Besides, the modified electrode showed an inherent stability, fast response time, and good anti-interference ability. These suggested that the PTH/CNT/GC electrode was favorable and reliable for the detection of nitrite.