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Hydrothermal core-shell carbon nanoparticle films : Thinning the shell leads to dramatic pH response

Xia, Fengjie ; Pan, Mu ; Mu, Shichun ; Xiong, Yuli ; Edler, Karen J. LU orcid ; Idini, Ilaria LU ; Jones, Matthew D. ; Tsang, Shik Chi and Marken, Frank (2012) In Physical Chemistry Chemical Physics 14(45). p.15860-15865
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... (More)

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.

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author
; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Physical Chemistry Chemical Physics
volume
14
issue
45
pages
6 pages
publisher
Royal Society of Chemistry
external identifiers
  • pmid:23093065
  • scopus:84868515643
ISSN
1463-9076
DOI
10.1039/c2cp42659e
language
English
LU publication?
no
id
dc26bf3f-f90f-42e0-ae24-cb6e4e187412
date added to LUP
2023-05-04 18:42:05
date last changed
2024-01-05 01:12:45
@article{dc26bf3f-f90f-42e0-ae24-cb6e4e187412,
  abstract     = {{<p>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.</p>}},
  author       = {{Xia, Fengjie and Pan, Mu and Mu, Shichun and Xiong, Yuli and Edler, Karen J. and Idini, Ilaria and Jones, Matthew D. and Tsang, Shik Chi and Marken, Frank}},
  issn         = {{1463-9076}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{45}},
  pages        = {{15860--15865}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Physical Chemistry Chemical Physics}},
  title        = {{Hydrothermal core-shell carbon nanoparticle films : Thinning the shell leads to dramatic pH response}},
  url          = {{http://dx.doi.org/10.1039/c2cp42659e}},
  doi          = {{10.1039/c2cp42659e}},
  volume       = {{14}},
  year         = {{2012}},
}