Label-free fluorescent biosensor based on the target recycling and Thioflavin T-induced quadruplex formation for short DNA species of c-erbB-2 detection.

Highlights: [•] The biosensor was based on target recycling and Thioflavin T-induced quadruplex. [•] Thioflavin T was first used as a fluorescent indicator for biosensor fabrication. [•] This sensor can detect as low as 20fM DNA with ultra-high discrimination ability. [Copyright &y& Elsevier]