title: Real-time label-free quantitative fluorescence microscopy-based detection of ATP using a tunable fluorescent nano-aptasensor platform.
abstract: Although real-time label-free fluorescent aptasensors based on nanomaterials are increasingly recognized as a useful strategy for the detection of target biomolecules with high fidelity, the lack of an imaging-based quantitative measurement platform limits their implementation with biological samples. Here we introduce an ensemble strategy for a real-time label-free fluorescent graphene (Gr) aptasensor platform. This platform employs aptamer length-dependent tunability, thus enabling the reagentless quantitative detection of biomolecules through computational processing coupled with real-time fluorescence imaging data. We demonstrate that this strategy effectively delivers dose-dependent quantitative readouts of adenosine triphosphate (ATP) concentration on chemical vapor deposited (CVD) Gr and reduced graphene oxide (rGO) surfaces, thereby providing cytotoxicity assessment. Compared with conventional fluorescence spectrometry methods, our highly efficient, universally applicable, and rational approach will facilitate broader implementation of imaging-based biosensing platforms for the quantitative evaluation of a range of target molecules.
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. nelee@skku.edu.
authors.forename: Sajal
authors.initials: S
authors.lastname: Shrivastava
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. nelee@skku.edu.
authors.forename: Il-Yung
authors.initials: IY
authors.lastname: Sohn
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. nelee@skku.edu.
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Son
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. nelee@skku.edu.
authors.forename: Won-Il
authors.initials: WI
authors.lastname: Lee
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. nelee@skku.edu and SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
authors.forename: Nae-Eung
authors.initials: NE
authors.lastname: Lee
mesh_terms: D000255:Adenosine Triphosphate / Q000032:analysis*; D015374:Biosensing Techniques / Q000379:methods*; D005453:Fluorescence; D006108:Graphite / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*
chemical_list: D006108:Graphite; D000255:Adenosine Triphosphate