Field-effect transisstors based on reduced graphene oxide for chemical and biological detection
Graphene have showing great performance in electronic sensing for various chemicals and biomolecules. In particular, reduced graphene oxide (rGO)-based electronic sensors offer several key advantages, such as low cost, large yield, and high reproducibility. First, a low-cost method based on micr...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2012
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| Online Access: | http://hdl.handle.net/10356/50936 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Graphene have showing great performance in electronic sensing for various chemicals and biomolecules. In particular, reduced graphene oxide (rGO)-based electronic sensors offer several key advantages, such as low cost, large yield, and high reproducibility.
First, a low-cost method based on microfluidics is developed for the fabrication of rGO thin film on various substrates. The resulting rGO micropatterns were used as channel in solution-gated field-effect transistors (FETs), and used for electronic sensing.
Second, the micropatterned rGO channel was chemically functionalized with metallothionein type II, and used to detect Hg2+ ions.
Third, alternatively, the Langmuir-Blodgett (LB) method was used to fabricate rGO-based thin-film transistors (TFTs) and used to detect the hybridization of target ssDNA in nanomole scale in real time.
Fourth, by combining two solution processes, an all-rGO TFT with rGO film as electrodes and rGO micropatterns as channel was developed.
Lastly, a TFT based on novel two-dimensional material (MoS2) as channel was developed and used as toxic gas sensor. |
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