کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
740751 | 894186 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical deposition of polypyrrole/graphene oxide composite on microelectrodes towards tuning the electrochemical properties of neural probes Electrochemical deposition of polypyrrole/graphene oxide composite on microelectrodes towards tuning the electrochemical properties of neural probes](/preview/png/740751.png)
By exploiting the electrostatic interaction between positively charged pyrrole cation radicals and negatively charged graphene oxide (GO) sheets, we prepared polypyrrole/graphene oxide (PPy/GO) composite films by a one-step electrochemical process. We studied the effects of the polymerization current density and the GO content in electrolyte on the formation of PPy/GO coatings onto platinum neural microelectrode sites. As compared with pure PPy film, PPy/GO coatings show a rougher surface feature with micrometer-scale bulges. The impedance of the PPy/GO coated Pt electrode is only about 10% of the bare Pt electrode at the biological relevant 1 kHz, while the charge capacity density is more than two orders of the magnitude of the bare Pt electrode. Moreover, the PPy/GO coated Pt electrodes show higher performance than the PPy coated electrodes for the application of neural probe.
► Polypyrrole and graphene oxide are electrochemically co-deposited.
► This composite is applied on neural microelectrodes.
► Impedance of the modified microelectrode is largely decreased.
► Charge capacity density is more than two orders of magnitude of the bare electrode.
► Higher performance of neural probe is anticipated.
Journal: Sensors and Actuators B: Chemical - Volume 158, Issue 1, 15 November 2011, Pages 176–184