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中文摘要 微电极因其小尺寸表现出许多与常规电极不同的优良性质：高传质速率、小时间常数、低IR降、高信噪比和高电流密度等，因此，微电极成为电化学和电分析化学的前沿领域之一。超微电极的优点使其在电化学动力学、伏安检测、修饰纳米微电极、传感器、成像探针和单分子检测等方面都有着广阔的潜在应用背景。因此探讨超微电极的制作及其应用有着重要的意义。本论文包含以下四个部分： 第一章首先对超微电极的基本原理及特点、制作方法、表征方法及应用等方面做了详细介绍。且对扫描电化学显微镜的实验装置、工作模式及应用等也进行了阐述。 第二章用电化学镀绝缘膜和电化学刻蚀相结合的方法制备了不同材料（铂、金、碳纤维）不同尺寸的超微圆盘电极。并用循环伏安技术对其进行表征，它们都有良好的伏安响应。并根据极限电流算出电极的有效面积，其中最小有效半径可达到1.6μm。观察了扫速的变化对循环伏安曲线形状的影响，我们还通过对比超微电极放置四周前后的稳态电流对其稳定性进行了考察，结果证明我们制备的超微电极有很好的稳定性。 第三章 HAuCl4存在的条件下从单一K3Fe（CN）6溶液中采用循环伏安法在常规铂电极上制备普鲁士蓝(PB)，探讨了K3Fe（CN）6浓度、HAuCl4浓度、钾离子浓度及溶液pH值对PB沉积速度的影响。对其电化学性质进行研究，结果表明Au颗粒的存在大大改善了膜的性能，并用该修饰电极对L-半胱氨酸及溶液中葡萄糖进行检测，分别求出了它们的线性范围和检测限。实验结果证明PB修饰电极对它们都表现出很强的电催化活性。 第四章 用第三章中优化了的条件在超微铂电极上沉积PB制成微修饰电极，在KCl溶液中用循环伏安法对修饰电极进行表征，实验证明PB成功地沉积到了铂微电极的表面。该修饰电极在 pH 7.0 PBS溶液中具有良好的化学和电化学稳定性，对H202表现出强的电催化活性，安培法检测H202的线性范围为3.2×10-4～5.6×10-7 M，检出下限为6.0×10-8M。将所制得的超微电极用作SECM的探针，对自组装上膜过程进行了表征，通过探针电流的变化检测到了基底的形貌。并用产生/收集模式表征了GOx酶点的位置。 关键词： 微电极 制作 修饰电极 扫描电化学显微镜 产生/收集模式 |
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xuxuefengedu(金币+1,VIP+0):拒绝在线翻译哦 5-5 19:47
xuxuefengedu(金币+1,VIP+0):拒绝在线翻译哦 5-5 19:47
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Abstract: Because the micro electrode it displays many and the conventional electrode different fine nature light-sized: The high mass transfer speed, the small time-constant, low IR fall, the high signal-to-noise ratio and the high current density and so on, therefore, the micro electrode becomes the electrochemistry and electrolysis chemistry front domains one. The micro electrode's merit causes it at aspects and so on electrochemistry dynamics, volt-ampere examination, beautification nanometer micro electrode, sensor, image formation probe and single molecular examination has the broad latent application background. Therefore the discussion micro electrode's manufacture and the application have the vital significance. The present paper contains following four parts: The first chapter first to micro aspects and so on electrode's basic principle and characteristic, manufacture method, attribute method and application has made the detailed introduction. And to scanned the electrochemistry microscope's test installation, the working pattern and using and so on has also carried on the elaboration. the second chapter the method which used electricity the chemical plating certainly velum and the electrochemistry sculpture unifies has prepared the different material (platinum, gold, carbon fiber) the different size micro disk electrode. And carries on the attribute with a circulation volt-ampere technology to it, they have the good volt-ampere response. And figures out electrode's active surface according to the limiting current, is smallest the effective radius to be possible to achieve 1.6μm. Observed has swept the fast change to the circulation volt-ampere curve shape influence, we have also carried on the inspection through the contrast micro electrode laying aside all around around steady current to its stability, finally proved we prepared the micro electrode had the very good stability. The third chapter under the HAuCl4 existence's condition (CN) in 6 solutions uses the circulation voltammetry from sole K3Fe to prepare Prussian blue (PB) on the conventional platinum electrode, has discussed K3Fe (CN) 6 densities, the HAuCl4 density, the potassium ion concentration and the solution pH value to the PB deposition rate influence. Conducts the research to its electrochemistry nature, finally indicated that the Au pellet the existence improved the membrane performance greatly, and the glucose carries on the examination with this modified electrode to the L- cysteine and the solution, has extracted their linearity range and the examination separately limits. The experimental result proved that the PB modified electrode displays the very strong electrocatalysis activeness to them. the fourth chapter optimized with the third chapter in the condition deposits PB on the micro platinum electrode to make the micro modified electrode, carries on the attribute in the KCl solution with the circulation voltammetry to the modified electrode, the experiment proved that PB deposited successfully the platinum micro electrode's surface. This modified electrode solutions has the good chemistry and the electrochemistry stability in pH in 7.0 PBS, displays the strong electrocatalysis activeness to H202, an ampere law examines H202 the linearity range for 3.2×10-4~5.6×10-7 M, picks out the lower limit for 6.0×10-8M. Will make the micro electrode which results to serve as SECM the probe, to the membrane process has carried on the attribute from the assembly, examined the basis appearance through the probe electric current's change. And with had/the collection pattern to attribute a GOx enzyme position. Key words: Micro electrode manufacture modified electrode scanning electrochemistry microscope Has/the collection pattern |
2楼2009-04-29 09:29:38
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xuxuefengedu(金币+15,VIP+0):太谢谢你了，呵呵 4-29 18:53
xuxuefengedu(金币+15,VIP+0):太谢谢你了，呵呵 4-29 18:53
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Abstract: Microelectrodes display excellent properties including high mass transfer speed, the small time-constant, low IR fall, high signal-to-noise ratio and high current density due to its small size in shape, in comparison with the conventional electrodes. Therefore, microelectrode technology has become one of the frontiers of the electrochemistry study and electrolysis chemistry study. The advantages of microelectrode ensured its broad application in terms of electrochemistry dynamics, volt-ampere detection, decorated nanometer microelectrode, sensor, image formation probe and single molecular examination. As a result, studying on the prepare of microelectrodes as well as its application are of great significance. The paper was divided into the following four parts: In Chapter I, a detailed introduction about the basic principle and characteristics, manufacturing process, characterization as well as the application of microelectrodes was put forward, and experiment apparatus as well as the working mode of scanning electrochemistry microscope were also elaborated in this chapter. In Chapter II, microelectrodes of varied size and materials (platinum, gold, carbon fiber) were prepared by means of combination of electrochemistry insulated membrane and electrochemistry sculpture. Microelectrodes prepared were further characterized with circular volt-ampere technology and satisfactory volt-ampere responses had been obtained. In addition, the effective area of microelectrode was calculated according to the curve of electricity limit, and the minimum effective radius reached up to 1.6μm. The influence of scanning speed on the shape of volt-ampere was also studied in this chapter, and we investigated the stability of microelectrodes by placing it in different directions around the stable current, which proved an excellent stability possessed in our microelectrodes. In Chapter III, with the presence of HAuCl4, Prussian blue (PB) was prepared using circular volt-ampere technique from a single K3Fe(CN)6 solution on the basis of conventional electrodes, and the influence of K3Fe(CN)6 concentration, HAuCl4 concentration, potassium ion concentration and solution pH value on the deposition rate of PB were investigated, respectively. The Electrochemical properties of PB were also studied in this chapter. Studies indicated that the presence of Au could significantly improve membrane properties. The content of glucose in L-cysteine solution was detected by means of PB modified electrode, and their linear range and detection limit were calculated accordingly. Results showed that PB modified electrodes have exhibited good electrocatalytic activity. In Chapter IV, the modified microelectrode was prepared by depositing PB on the surface of micro platinum electrode under the optimized condition obtained in Chapter III. And good results had been achieved so far. The modified microelectrode possessed excellent chemical and electrochemical stability in PBS solution of pH 7.0, and exhibited strong electrocatalytic activity towards H202. The linear range of H202 measured by Amperometric detection was from3.2×10-4 to5.6×10-7M, with a detection threshold of 6.0 × 10-8M. By serving as an SECM probe, the modified microelectrode was characterized in the self-assembly membrane process. And the morphology of the substrate was detected, and the position of GOx enzyme with production/collection mode were further characterized. Key words: microelectrode, preparation process, modified electrode, scanning electrochemical microscopy, production/collection mode  拒绝在线翻译[ Last edited by zhaomei2007 on 2009-4-29 at 13:56 ] |
3楼2009-04-29 11:54:46
angellove3626
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xuxuefengedu(金币+3,VIP+0): 5-5 19:48
xuxuefengedu(金币+3,VIP+0): 5-5 19:48
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Microelectrodes show the excellent characters different from conventional performance of electrodes because of their small size, such as high mass transfer rate, a small time constant, low IR drop, high signal to noise ratio and high current density and so on, therefore, they become one of the forefront the fields of micro-electrode electrochemical and electroanalytical chemistry. The advantages of Microelectrodes make them high insight into electrochemical kinetics, voltammetric detection, micro-nano-modified electrodes, sensors, imaging probes and single-molecule detection. Therefore to explore the production of ultrafine electrodes and its application has an important significance. This paper contains the following four parts: Advanced Micro Devices chapter first electrode and the characteristics of the basic principles, production methods, characterization methods and applications introduced in detail. Scanning Electrochemical Microscopy and on the experimental device, work patterns and applications are also described. Chapter II electrochemical plating and electrochemical etching insulation film prepared a combination of different materials (platinum, gold, carbon fiber) of different sizes of Advanced Micro Devices disk electrode. And cyclic voltammetry techniques were characterized, they have good voltammetric response. Calculated in accordance with the current limit of the effective electrode area, which could reach the minimum effective radius of 1.6μm.Observed changes in scan rate cyclic voltammetry curves of the effects of shape, we have AMD by comparing before and after electrode placed around its steady-state stability of the current study, results show that ultrafine electrodes we prepared a very good stability sexual. Chapter III under the conditions of the existence of HAuCl4 from a single K3Fe (CN) 6 solution using cyclic voltammetry on Pt electrode in the conventional preparation of Prussian blue (PB), of K3Fe (CN) 6 concentration, HAuCl4 the concentration of potassium ion concentration and solution pH value of deposition rate on the impact of PB.Electrochemical properties of their study results show that the existence of Au particles greatly improved the performance of membrane, and the modified electrode for L-cysteine and glucose test solution, respectively, calculated their linear range and detection limit. Experimental results show that PB modified electrodes have shown their strong electrocatalytic activity. Chapter IV of Chapter III to optimize use of the conditions of deposition of ultrafine platinum electrode made of micro-PB modified electrode in KCl solution using cyclic voltammetry characterization of the modified electrode, the experiment proved successful deposition of PB to the platinum microelectrode surface. The modified electrode in pH 7.0 PBS solution has a good chemical and electrochemical stability of H202 show strong electrocatalytic activity, Amperometric H202 linear detection range of 3.2 × 10-4 ~ 5.6 × 10-7 M, the detection threshold of 6.0 × 10-8M. Will be obtained by Advanced Micro Devices SECM probe electrode for the self-assembly process on the membrane were characterized by current probe to detect changes in the morphology of the substrate. And produced / collection mode characterized enzyme GOx points. Key words: microelectrode modified electrode production generated Scanning Electrochemical Microscopy / collection mode |
4楼2009-04-29 12:29:50
myhaoqq
铁杆木虫 (著名写手)
小木虫警备司令员
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xuxuefengedu(金币+8,VIP+0):谢谢参与 5-5 19:49
xuxuefengedu(金币+8,VIP+0):谢谢参与 5-5 19:49
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中文摘要 Abstract: 微电极因其小尺寸表现出许多与常规电极不同的优良性质：高传质速率、小时间常数、低IR降、高信噪比和高电流密度等，因此，微电极成为电化学和电分析化学的前沿领域之一。超微电极的优点使其在电化学动力学、伏安检测、修饰纳米微电极、传感器、成像探针和单分子检测等方面都有着广阔的潜在应用背景。因此探讨超微电极的制作及其应用有着重要的意义。本论文包含以下四个部分： 第一章首先对超微电极的基本原理及特点、制作方法、表征方法及应用等方面做了详细介绍。且对扫描电化学显微镜的实验装置、工作模式及应用等也进行了阐述。 Microelectrodes perform excellent characters including the high mass transfer rate, the small time constant, the low IR drop, the high signal-to-noise and the high current density owing to its small size, comparing with the conventional electrodes. thus, microelectrode has become one of the frontiers of the electrochemistry and electrolysis chemistry. The advantages of microelectrode make it a broader potential application in respect of electrochemistry dynamics, volt-ampere detection, decorated nanometer microelectrode, sensor, image formation probe and single molecular examination. Therefore, the discussion about preparation of microelectrodes and its application is of great significance. The paper contained the following four parts: 第一章首先对超微电极的基本原理及特点、制作方法、表征方法及应用等方面做了详细介绍。且对扫描电化学显微镜的实验装置、工作模式及应用等也进行了阐述。 The Chapter 1, the basic principle and characteristics, manufacturing method, symptom method as well as the application of microelectrodes was introduced in detail, and experiment apparatus and the working mode of scanning electrochemistry microscope were also formulated. 第二章用电化学镀绝缘膜和电化学刻蚀相结合的方法制备了不同材料（铂、金、碳纤维）不同尺寸的超微圆盘电极。并用循环伏安技术对其进行表征，它们都有良好的伏安响应。并根据极限电流算出电极的有效面积，其中最小有效半径可达到1.6μm。观察了扫速的变化对循环伏安曲线形状的影响，我们还通过对比超微电极放置四周前后的稳态电流对其稳定性进行了考察，结果证明我们制备的超微电极有很好的稳定性。 The Chapter 2, the microelectrodes of different size and materials (platinum, gold, carbon fiber) were prepared by means of combination of electrochemistry insulated membrane and electrochemistry etch and then Microelectrodes were further characterized with circular volt-ampere technology and excellent volt-ampere responses can been obtained. In addition, the effective area of microelectrode was calculated through electricity limit, and the minimum effective radius reached up to 1.6μm. The influence of scanning speed on the shape of volt-ampere was also investigated, and we researched the stability of microelectrodes by placing it in different directions around the stable current, the result testified an excellent stability of our ultramicroelectrodes. 第三章 HAuCl4存在的条件下从单一K3Fe（CN）6溶液中采用循环伏安法在常规铂电极上制备普鲁士蓝(PB)，探讨了K3Fe（CN）6浓度、HAuCl4浓度、钾离子浓度及溶液pH值对PB沉积速度的影响。对其电化学性质进行研究，结果表明Au颗粒的存在大大改善了膜的性能，并用该修饰电极对L-半胱氨酸及溶液中葡萄糖进行检测，分别求出了它们的线性范围和检测限。实验结果证明PB修饰电极对它们都表现出很强的电催化活性。 The Chapter 3, with the presence of HAuCl4, Prussian blue (PB) was prepared by means of circular volt-ampere technique in a single K3Fe(CN)6 solution on the basis of conventional electrodes, and the influence of K3Fe(CN)6 concentration, HAuCl4 concentration, potassium ion concentration and solution pH value for the deposition rate of PB were investigated, respectively. And also the Electrochemical properties of PB were studied which indicated that the presence of Au could greatly improve the performance of membrane. The content of glucose in L-cysteine solution was detected through PB modified electrode, and their linear range and detection limit were calculated respectively. The result of the experiment proved that PB modified electrodes have showed strong electrocatalytic activity. 第四章 用第三章中优化了的条件在超微铂电极上沉积PB制成微修饰电极，在KCl溶液中用循环伏安法对修饰电极进行表征，实验证明PB成功地沉积到了铂微电极的表面。该修饰电极在 pH 7.0 PBS溶液中具有良好的化学和电化学稳定性，对H202表现出强的电催化活性，安培法检测H202的线性范围为3.2×10-4～5.6×10-7 M，检出下限为6.0×10-8M。将所制得的超微电极用作SECM的探针，对自组装上膜过程进行了表征，通过探针电流的变化检测到了基底的形貌。并用产生/收集模式表征了GOx酶点的位置。 The Chapter 4, the modified microelectrode prepared by depositing PB under the surface of oplatinum micrelectrode with the optimized condition obtained above was charactered using VC method in KCl solution, And experiment had proved the PB was deposited under the suface of oplatinum micrelectrode. The modified microelectrode beared excellent chemical and electrochemical stability in PBS solution of pH 7.0, and showed strong electrocatalytic activity for H202. The linear range of H202 measured by Amperometric detection was from 3.2×10-4 to 5.6×10-7M, with a detection threshold of 6.0 × 10-8M. By using as an SECM probe, the modified microelectrode was characterized in the self-assembly membrane process, and then the morphology of the substrate was detected. Furthermore, the position of GOx enzyme with production/collection mode were characterized. 关键词： 微电极 制作 修饰电极 扫描电化学显微镜 Key words: microelectrode, preparation, modified electrode, scanning electrochemical microscopy |
5楼2009-04-29 23:03:51
