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Persistent URL
http://purl.org/net/epubs/work/64630
Record Status
Checked
Record Id
64630
Title
Hydrothermal core-shell carbon nanoparticle films: thinning the shell leads to dramatic pH response
Contributors
F Xia (Wuhan University of Technology)
,
M Pan (Wuhan University of Technology)
,
S Mu (Wuhan University of Technology)
,
Y Xiong (Bath U.)
,
KJ Edler (Bath U.)
,
I Idini (Bath U.)
,
MD Jones (Bath U.)
,
SC Tsang (Oxford U.)
,
F Marken (Bath U.)
Abstract
Carbon nanoparticles with phenylsulfonate negative surface functionality (Emperor 2000, Cabot Corp.) are coated with positive chitosan followed by hydrothermal carbonization to give highly pH-responsive core-shell nanocarbon composite materials. With optimised core-shell ratio (resulting in an average shell thickness of ca. 4 nm, estimated from SANS data) modified electrodes exhibit highly pH-sensitive resistance, capacitance, and Faradaic electron transfer responses (solution based, covalently bound, or hydrothermally embedded). A shell "double layer exclusion" mechanism is discussed to explain the observed pH switching effects. Based on this mechanism, a broader range of future applications of responsive core-shell nanoparticles are envisaged.
Organisation
ISIS
,
ISIS-LOQ
,
STFC
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Language
English (EN)
Type
Details
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Year
Journal Article
Phys Chem Chem Phys
14, no. 45 (2012): 15860-15865.
doi:10.1039/c2cp42659e
2012
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