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The flexible cancer sensor based on layer-by-layer self-assembled graphene reported in this letter demonstrates features including ultrahigh sensitivity and low cost due to graphene material properties in nature, self-assembly technique, and polyethylene terephthalate substrate. According to the conductance change of self-assembled graphene, the label free and labeled graphene sensors are capable of detecting very low concentrations of prostate specific antigen down to 4 fg/ml (0.11 fM) and 0.4 pg/ml (11 fM), respectively, which are three orders of magnitude lower than carbon nanotube sensors under the same conditions of design, manufacture, and measurement.
Published in:
Applied Physics Letters
(Volume:98
,
Issue:
7
)
Date of Publication: Feb 2011
- Page(s):
- 073116 - 073116-3
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.3557504
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 24 February 2011
- Issue Date :
- Feb 2011
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