Hydrothermal core-shell carbon nanoparticle films : Thinning the shell leads to dramatic pH response
(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
- Xia, Fengjie ; Pan, Mu ; Mu, Shichun ; Xiong, Yuli ; Edler, Karen J. LU ; Idini, Ilaria LU ; Jones, Matthew D. ; Tsang, Shik Chi and Marken, Frank
- publishing date
- 2012-12-05
- 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
-
- scopus:84868515643
- pmid:23093065
- 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}}, }