NDLI: Hierarchical Nafion enhanced carbon aerogels for sensing applications

Content Provider	Royal Society of Chemistry (RSC)
Author	Shepherd, Roderick Liu, Yuqing Ding, Ailing Lau, King Tong Weng, Bo Chen, Jun Diao, Jianglin Li, Changming Razal, Joselito
Copyright Year	2016
Abstract	This work describes the fabrication of hierarchical 3D Nafion enhanced carbon aerogels (NECAGs) for sensing applications via a fast freeze drying method. Graphene oxide, multiwalled carbon nanotubes and Nafion were mixed and extruded into liquid nitrogen followed by the removal of ice crystals by freeze drying. The addition of Nafion enhanced the mechanical strength of NECAGs and effective control of the cellular morphology and pore size was achieved. The resultant NECAGs demonstrated high strength, low density, and high specific surface area and can achieve a modulus of 20 kPa, an electrical conductivity of 140 S m−1, and a specific capacity of 136.8 F g−1 after reduction. Therefore, NECAG monoliths performed well as a gas sensor and as a biosensor with high sensitivity and selectivity. The remarkable sensitivity of 8.52 × 103 μA mM−1 cm−2 was obtained in dopamine (DA) detection, which is two orders of magnitude better than the literature reported values using graphene aerogel electrodes made from a porous Ni template. These outstanding properties make the NECAG a promising electrode candidate for a wide range of applications. Further in-depth investigations are being undertaken to probe the structure–property relationship of NECAG monoliths prepared under various conditions.
Starting Page	3416
Ending Page	3424
Page Count	9
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	8
Issue Number	6
Journal	Nanoscale
DOI	10.1039/c5nr08631k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphite oxide Dopamine Electrode Aerogel Specific surface area Carbon Pascal (unit) Three-dimensional space Carbon nanotube Electrical resistivity and conductivity Nafion Graphene Biosensor NECAG Freeze-drying Gas detector
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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