| Comparison of electrochemical activity of graphene family: graphene oxide, chemically reduced graphene oxide, electrochemically reduced graphene oxide and functionalized graphene oxide |
| کد مقاله : 1099-CNF |
| نویسندگان |
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فاطمه خسروی *، مصظفی عظیم زاده دانشگاه علوم پزشکی شهید صدوقی (یزد) |
| چکیده مقاله |
| Nanomaterials, in electrochemical biosensing applications, have a special place for variety of methods to enhance the accuracy and sensitivity. Among all applied nanomaterials in electrochemistry, graphene oxide is the most common which its chemical modification can led to different characteristics as well; however, all of them are capable of expanding the surface of electrode. Here in our experiments, we evaluate and compared different types of graphene (including graphene oxide, chemically reduced graphene oxide, electrochemically reduced graphene oxide and functionalized graphene oxide) in composition with gold nanoparticles with different methods in order to enhance the sensitivity of an electrochemical detection via electrical conductivity enhancement to be used in future biosensors. We have used Cyclic Voltammetry (CV) method to evaluate characteristics of the fabricated electrode. In results, the conductivity of the nanocomposites were different and the electrochemically reduced graphene oxide was the most conductive one but the weak mechanical properties of the reduced graphene oxide can be a drawback in electrode preparation steps. But before reduction, graphene oxide itself transfers the least electrons among all of graphene oxide types. In term of conductivity, after electrochemically reduced graphene oxide is functionalized graphene oxide which shows great mechanical properties as well. Functionalized graphene oxide's conductivity is mostly because of iron and nickel atoms on its surface. Another examined graphene oxide type was chemically reduced graphene oxide which was neither conductive enough nor with proper mechanical properties. In conclusion, we believe based on our findings, functionalized graphene oxide (with conductive metal groups) can be the best option in case of conductivity advantages to be used in biosensors. |
| کلیدواژه ها |
| Graphene oxide, electrochemical biosensor, CV, conductivity |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |