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柱状结构阵列碳纳米管膜的超疏水性研究   总被引:12,自引:1,他引:11       下载免费PDF全文
浸润性是固体表面的重要性质之一 .决定固体表面的浸润性的两个主要因素中 ,化学性质是内因 ,而几何结构形貌也是不可缺少的重要因素 .通过改变固体表面的粗糙度可以改变其浸润性 [1~ 5] .通常 ,人们用水接触角的大小来衡量固体表面水的浸润性 ,水与固体表面的接触角大于 1 5  相似文献
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Among the three main methods for the synthesis of carbon nanotubes (CNTs), chemical vapor deposition (CVD) has received a great deal of attention since CNTs can be synthesized at significantly low temperature. Plasma chemical vapor deposition methods can synthesize CNTs at lower temperature than thermal CVD. But in the usual catalytic growth of CNTs by CVD, CNTs are often tangled together and have some defects. These will limit the property research and potential applications. How to synthesize the straight CNTs at low temperature becomes a challenging issue. In this letter, straight carbon nanotube (CNT) films were achieved by microwave plasma chemical vapor deposition (MWPCVD) catalyzed by round Fe-Co-Ni alloy particles on Ni substrate at 610℃. It was found that, in our experimental condition, the uniform growth rate along the circumference of round alloy particles plays a very important role in the growth of straight CNT films. And because the substrate is conducting, the straight CNT films grown at low temperature may have the benefit for property research and offer the possibility to use them in the future applications.  相似文献
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基于刚果红(CR)表面修饰多壁碳纳米管(MWNTs)在干燥时所具有的良好成膜性能,在玻碳电极表面制备了一种水溶性MWNTs(MWNTs-CR)膜,用扫描电镜(SEM)、傅立叶红外光谱(FTIR)和交流阻抗谱(ElS)对其进行了表征.结果表明,MWNTs-CR能在电极表面形成一层致密、均匀含有大量纳米级微孔的纳米结构薄膜.和裸玻碳电极相比,MWNTs-CR膜修饰电极能极大的增强雌酮和羟甲香豆素的电化学响应.在体系中加入表面活性剂后,其电化学响应能得到进一步的提高.羟甲香豆素的浓度在8.0×10-8~4.0×10-6 mol/L范围内,其氧化峰电流与浓度呈现出良好的线性关系.在开路条件下富300 s后,HMC的检出限为2.0×10-8 mol/L.实验证明水溶性MWNTs膜是构建碳纳米管电化学传感器的理想材料.  相似文献
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碳纳米管性质奇特、用途广泛[1]。目前制备碳纳米管薄膜的方法主要有电弧放电法[2]、催化裂解[3]、及真空过滤碳纳米管悬浮液制备“巴基管纸”(Buckypaper)[4]等。本文采用镀镍基板催化裂解低碳烷烃法制备碳纳米管薄膜,考察了镀膜时间、蚀刻和氨水处理等条件对碳纳米管薄膜产物形貌的影响。1 实验部份1 1 镀膜与后处理采用离子溅射法在硅酸盐基板上镀镍,镀镍电流7 5mA,镀镍时间分别为2min、15min、30min、45min或60min;对镀镍基板再进行蚀刻(蚀刻电流7 5mA,蚀刻时间2min)或用氨水浸泡处理(含NH325%,超声振荡30min),然后烘干备用。1 …  相似文献
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为了获得表面平整的定向纳米碳管,通过化学及物理的方法将纳米碳管膜进行反转,使其原来的AAO模板底面成为新的表面,用溶液逐步去除表面的铝和氧化铝后,获得了平整的定向纳米碳管膜表面,从而可将其作为工作面使用. 还比较了5%NaOH和6%H3PO4+1.8%H2CrO4溶液去除氧化铝的效果.  相似文献
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Amorphous carbon nanoparticles (a-CNPs) on a multi-walled carbon nanotube (MWCNT) film, deposited on a silicon substrate, were synthesized using an electrodeposition combination from a methanol suspension of polydiallyldimethylammonium chloride-modified MWCNTs. A low-voltage electropho- retic deposition of the MWCNTs and a high-voltage electrochemical deposition of the a-CNPs were carried out to yield homogenously attached a-CNPs on the surfaces of the MWCNTs, and form a composite film with good adhesion to the substrate. This scalable technology can produce a large area of a-CNP/MWCNT film. And the field emission investigations show that the a-CNP/MWCNT film has turn- on electric field of 3.17 V μm- 1 (at 10 μA cm-2) and threshold field of 4.62 V μm-1 (at 1 mA cm-2), which are lower than those of the MWCNT film. The a-CNP/MWCNT film can be deposited simply with large areas and may be a promising cathode material applied in field emission displays.  相似文献
7.
Tran LD  Nguyen DT  Nguyen BH  Do QP  Nguyen HL 《Talanta》2011,85(3):1560-1565
In this study, polyaniline-multiwalled carbon nanotube film (PANi-MWCNT) has been polymerized on interdigitated platinum electrode arrays (IDA), fabricated by MEMS technology for the detection of human papillomavirus (HPV) infection, using immobilized peptide aptamers as affinity capture reagent. Label-free, electrochemical detection of the specific immune reaction between antigen peptide aptamer HPV-16-L1 (with a molecular weight of 1825 Da), the most common genotype in cytological normal women worldwide, and its specific antibody of HPV-16 (which is much bigger with molecular weight of ca. 150 kDa) on multifunctional PANi-MWCNT based arrays was reported. The most significant advantage of this technique consists of reagentless and multiple detection of antigen-antibody complex formation on well conducting IDA interface of PANi-MWCNT, without intermediate steps or any labeling reagents, as normally required in the previous works.  相似文献
8.
李振华  姜源  赵沛  尚学府  杨辉  王淼 《物理化学学报》2009,25(11):2395-2398
介绍了一种制备大面积高纯度单壁碳纳米管(SWCNT)薄膜的新方法. 利用改进的电弧放电法, 在真空放电室内分别安装两枚石墨极板, 使之形成一个球冠型电容器. 使用这种新型装置, 可以在两枚球冠型石墨极板之间产生一个合适的附加电场和成膜基板, 通过控制放电时间, 可在阴极的球冠型石墨极板上制备出厚度从数微米至1毫米不等的SWCNT薄膜. 场发射扫描电子显微镜(FESEM)、高分辨透射电子显微镜(HRTEM)、拉曼光谱和热重分析(TGA)的表征结果表明, 这个方法可以高效地制备具有高纯度的SWCNT薄膜.  相似文献
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