An ultrasensitive and low-cost graphene sensor based on layer-by-layer nano self-assembly

Bo Zhang, Tianhong Cui

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number073116
JournalApplied Physics Letters
Volume98
Issue number7
DOIs
StatePublished - Feb 14 2011

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