首页> 外文OA文献 >Electrochemical sensing using micro- and nanostructured poly(ferrocenylsilane)s
【2h】

Electrochemical sensing using micro- and nanostructured poly(ferrocenylsilane)s

机译:使用微米和纳米结构的聚二茂铁基硅烷进行电化学传感

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

In this thesis, we look for ways to use the polymer poly(ferrocenylsilane) in sensor applications. Drying a mix of PFS-Vinylimidazole with polyacrylic acid (PAA) results in a partially phase-separated layer. We have visualised this using electron microscopy (SEM) and X-ray scattering (SAXS). When the dried layer is exposed to ammonia, a porous membrane is formed. The size of the pores in the membrane can be influenced by oxidation and reduction of the PFS. We investigated fully oxidised and fully reduced membranes using electron microscopy (SEM) and X-rays (SAXS). Furthermore, we developed an electrochemical cell which allows us to carry out in-situ SAXS measurements. Using this cell, we cannot only observe the two extreme membrane states, but also the transition between them. Finally, we found that each redox state of the membrane has a unique impedance spectrum. Subsequently, we attempted to use the porous PFS membrane to fabricate a sensor. The applicability of the porous membrane was tested for ascorbic acid, Fe3+, hydrogen peroxide and enzymatic sensors. We obtained some encouraging results, but the stability of the membrane, the slow response and the limited conductibility complicate matters. There is a lot left to be desired in the reproducibility and reliability of sensors based on a porous PFS layer. Alternatively, in an attempt to construct a photonic sensor, we tested three types of PFS for use in two-photon-lithography. All three variants were suitable, but a number of obstacles was encountered. These obstacles and possible solutions were addressed in detail. Additionally, we discovered that the technology used for fabricating porous membranes can also be used to make porous micro particles. The first step herein is the fabrication of PFS/PAA micro particles. We managed to do this by means of a simple microfluidic device: a T-junction that forms droplets of polymer solution in PDMS oil. Because the polymer solvent mixes with the PDMS oil, it slowly vacates the droplets, leaving behind a PFS/PAA particle. After drying and ammonia treatment, porous PFS/PAA particles are obtained. Finally, a reference-electrode-free pH and conductivity sensor based on indium-tin-oxide (ITO) electrodes was developed.
机译:在本文中,我们寻找在传感器应用中使用聚合物聚二茂铁基硅烷的方法。将PFS-Vinylimidazole与聚丙烯酸(PAA)的混合物干燥会导致部分相分离的层。我们已经使用电子显微镜(SEM)和X射线散射(SAXS)对此进行了可视化。当干燥层暴露于氨气时,形成多孔膜。膜中孔的大小会受到PFS氧化和还原的影响。我们使用电子显微镜(SEM)和X射线(SAXS)研究了完全氧化和完全还原的膜。此外,我们开发了一种电化学电池,可以进行原位SAXS测量。使用该单元,我们不仅可以观察到两个极端膜状态,而且可以观察到它们之间的过渡。最后,我们发现膜的每个氧化还原状态都有一个独特的阻抗谱。随后,我们尝试使用多孔PFS膜来制造传感器。测试了多孔膜在抗坏血酸,Fe3 +,过氧化氢和酶传感器中的适用性。我们获得了一些令人鼓舞的结果,但膜的稳定性,响应慢和电导率有限使事情变得复杂。基于多孔PFS层的传感器的可重复性和可靠性还有很多需求。或者,为了构造光子传感器,我们测试了两种类型的PFS用于双光子光刻。所有三个变体都适用,但是遇到了许多障碍。这些障碍和可能的解决方案已得到详细解决。另外,我们发现用于制造多孔膜的技术也可以用于制造多孔微粒。本文的第一步是制备PFS / PAA微粒。我们设法通过一个简单的微流体装置来做到这一点:一个T形结在PDMS油中形成聚合物溶液的液滴。因为聚合物溶剂与PDMS油混合,所以它会缓慢排出液滴,留下PFS / PAA颗粒。在干燥和氨处理之后,获得多孔的PFS / PAA颗粒。最后,开发了基于氧化铟锡(ITO)电极的无参比pH和电导率传感器。

著录项

  • 作者

    Folkertsma-Hendriks, Laura;

  • 作者单位
  • 年度 2017
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号