Ion transport through polyelectrolyte multilayers.
Ion transport through polyelectrolyte multilayers.
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DOI：
10.1002/marc.201300571
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发表时间：
2013-12
影响因子：
4.6
通讯作者：
S. Carregal-Romero;P. Rinklin;S. Schulze;M. Schäfer;A. Ott;Dominik Hühn;Xian Yu;B. Wolfrum;K. Weitzel;W. Parak
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文献类型：
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作者：
S. Carregal-Romero;P. Rinklin;S. Schulze;M. Schäfer;A. Ott;Dominik Hühn;Xian Yu;B. Wolfrum;K. Weitzel;W. Parak
聚合物电解质多层膜和胶囊可以作为离子传感器应用于细胞内离子浓度的测量。先前的研究已经显示了PEM膜/壳对包封的离子敏感荧光团的特异性响应的影响。PEM壳被认为是环境和封装的荧光团之间的半渗透屏障。封装传感器的时间响应等参数可能受到PEM壳的孔隙率和电荷的影响。在这项研究中，封装的pH敏感的荧光团对周围环境中的pH值变化的时间响应进行了研究。此外，还测定了质子交换膜对钾离子的电导率。
Polyelectrolyte multilayer (PEM) films and capsules loaded with ion-sensitive fluorophores can be used as ion-sensors for many applications including measurements of intracellular ion concentration. Previous studies have shown the influence of the PEM films/shells on the specific response of encapsulated ion-sensitive fluorophores. PEM shells are considered as semipermeable barriers between the environment and the encapsulated fluorophores. Parameters such as the time response of the encapsulated sensor can be affected by the porosity and charge of the PEM shell. In this study, the time response of an encapsulated pH-sensitive fluorophore towards pH changes in the surrounding environment is investigated. Furthermore, the conductance of PEM films for potassium ions is determined.