Flexible electrochemical biosensors based on interfacially assembled metal nanocrystals and graphene paper
This study focuses on the fabrication of hybrid flexible electrodes to detect molecules related to human health. The hybrid electrodes were built upon flexible graphene paper and novel noble metal nanostructures. The size, morphology and surface chemistry of noble metal nanoparticles were well ta...
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| Main Author: | |
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| Other Authors: | |
| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/68783 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This study focuses on the fabrication of hybrid flexible electrodes to detect
molecules related to human health. The hybrid electrodes were built upon flexible
graphene paper and novel noble metal nanostructures. The size, morphology and
surface chemistry of noble metal nanoparticles were well tailored using wet
chemical method. Moreover, functionalized noble nanostructures were assembled at
the interface between water and organic solvents and transferred on the flexible
graphene paper via dip-coating. The fabricated free-standing flexible hybrid
electrodes were further applied to detect biomolecules (such as dopamine and nitric
oxide) released from living cells under external stimuli and heavy metals released
from degraded quantum dots uptake inside living cells. Owing to the high loading
density of 2D-assembled nanocrystals, remarkable electrocatalytic activity of
nanocrystals and good conductivity of flexible graphene paper, the constructed
sensors exhibited excellent performances toward detection a range of targets. Thus,
this work illustrated a simple and novel approach to the further development of
point-of-care electrochemical devices. |
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