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Single-wall carbon nanotubes(SWNTs) modified gold electrodes were prepared by using two different methods.The electrochemical behavior of cytochrome c on the modified gold electrodes was investigated.The first kind of SWNT-modified electrode (noted as SWNT/Au electrode)was prepared by the adsorption of carboxylterminated SWNTs from DMF dispersion on the gold electrode.The oxidatively processed SWNT tips were covalently modified by coupling with amines (AET) to form amide linkage.Via Au-S chemical bonding,the self-assembled monolayer of thiol-unctionalized nanotubes on gold surface was fabricated so as to prepare the others SWNT-modified electrode (noted as SWNT/AET/Au electrode).It was shown from cyclic voltammetry cxperiments that cytochrome c exhibited direct electrochemical responses on the both electrodes, but only the current of controlled diffusion existed on the SWNT/Au electrode while both the currents of controlled diffusion and adsorption of cytochrome c occurred on the SWNT/AET/Au electrode.Photoelastic Modulation Infared Reflection Absorpthion Spectroscopy (PEM-IRRAS) and Quartz Crystal Microbalance (QCM) were employed to verify the adsorption of SWNTs on the gold electrodes.The results proved that SWNTs could enhance the direct electron transfer proecss between the electrodes and redox proteins. 相似文献
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杜珊 《云南师范大学学报(自然科学版)》2005,25(4):47-51
文章讨论了原子力显微镜在轻敲模式下相位象的两类主要理论,简谐近似理论和能量理论;介绍了相位象在软材料如聚合物等表面分析研究上的应用,以及目前相位象研究的新问题。 相似文献
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设n,e>1均为正整数,利用初等的方法和技巧,以及Smarandache LCM函数和广义Euler函数的基本性质,讨论e∈{2,3,4,6}或e|φ(n)时,数论函数方程SL(n)=φe(n)的可解性,并给出该方程全部的正整数解. 相似文献
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采用烟草本底中加烟碱标样的方法测定游离烟碱回收率,测定结果偏低.从标样加入方式、烟草本身pH值等方面考察对游离烟碱回收率的影响,分析了回收率偏低的原因.结果表明,由于烟草水萃取液是弱酸性的缓冲体系,烟碱标样由游离态转变成结合态,导致回收率偏低. 相似文献
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牛顿环干涉实验研究 总被引:2,自引:0,他引:2
杜珊 《云南大学学报(自然科学版)》2004,26(B07):125-127
分析了牛顿干涉实验中存在的几个问题,提出了实验过程和数据处理中减少误差的一些方法。 相似文献
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Electrochemical Studies of Cytochrome c on Electrodes Modified by Single-Wall Carbon Nanotubes 总被引:2,自引:0,他引:2
Single wallcarbonnanotubes (SWNTs)modifiedgoldelectrodeswerepreparedbyusingtwodifferentmethods .Theelectrochemicalbehaviorofcytochromeconthemodifiedgoldelectrodeswasinves tigated .ThefirstkindofSWNT modifiedelectrode (notedasSWNT/Auelectrode)waspreparedbytheadsorptionofcarboxyl terminatedSWNTsfromDMFdispersiononthegoldelectrode .TheoxidativelyprocessedSWNTtipswerecovalentlymodifiedbycouplingwithamines (AET)toformamidelinkage .ViaAu—Schemicalbonding ,theself assembledmonolayerofthi… 相似文献
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介绍GPRS无线通讯模块在数据传送中的应用方法.介绍流量计算机采用GPRS技术实现数据上传的设计方法. 相似文献