Self-assembled reduced graphene oxide nanoflakes assisted by post-sonication boosted electrical performance in gold interdigitated microelectrodes
| Autor: | Steven Taniselass, M. K. Md Arshad, Muhammad M. Ramli, Subash C. B. Gopinath |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Electron mobility
Materials science Sonication Oxide Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Self assembled Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry law Electrical performance Graphene 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Microelectrode chemistry Graphite Gold 0210 nano-technology Microelectrodes Biosensor |
| Zdroj: | Journal of Colloid and Interface Science. 577:345-354 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2020.05.070 |
| Popis: | Reduced graphene oxide (rGO) is widely utilised to develop various types of biosensors; however, producing self-assembled rGO nanoflake networks through single-droplet drop-casting remains inconsistent. In the present work, we systematically used three different methods to prepare rGO suspensions in order to produce large scale self-assembled rGO nanoflake networks through single-droplet drop-casting. The rGO suspensions were prepared using only deionised water with no added any chemicals/organic solvents, which we considered to be a low-cost method. Subsequently, the most effective preparation method was used to deposit rGO nanoflakes onto commercial gold interdigitated microelectrodes (Au-IDE) to examine their electrical performance. Assessment of the yields, developed methods, surface morphologies, spectroscopy and structural analyses of the as-prepared rGO nanoflakes were conducted. The results revealed that method-3 (involving sonication, centrifugation and post-sonication) produced large self-assembled rGO nanoflake networks with strong adhesion to glass substrates. Furthermore, the as-prepared rGO/Au-IDE modified sensors showed excellent electron mobility where the electrical conductivity was enhanced approximately ~ 1000 fold compared to the bare devices. The present work provided new insights for depositing large self-assembled interconnected rGO nanoflake networks through single-droplet drop-casting which will be beneficial for biosensor development and other downstream applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect