title: Graphene Quantum Dots-based Photoluminescent Sensor: A Multifunctional Composite for Pesticide Detection.
abstract: Due to their size and difficulty to obtain, cost/effective biological or synthetic receptors (e.g., antibodies or aptamers, respectively), organic toxic compounds (e.g., less than 1 kDa) are generally challenging to detect using simple platforms such as biosensors. This study reports on the synthesis and characterization of a novel multifunctional composite material, magnetic silica beads/graphene quantum dots/molecularly imprinted polypyrrole (mSGP). mSGP is engineered to specifically and effectively capture and signal small molecules due to the synergy among chemical, magnetic, and optical properties combined with molecular imprinting of tributyltin (291 Da), a hazardous compound, selected as a model analyte. Magnetic and selective properties of the mSGP composite can be exploited to capture and preconcentrate the analyte onto its surface, and its photoluminescent graphene quantum dots, which are quenched upon analyte recognition, are used to interrogate the presence of the contaminant. This multifunctional material enables a rapid, simple and sensitive platform for small molecule detection, even in complex mediums such as seawater, without any sample treatment.
authors: ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain.|Science and Technology Department, A.K. Faculty of Education, Necmettin Erbakan University , Konya, 42090, Turkey.|Department of Chemistry, Institute of Science, Selcuk University , Konya, 42030, Turkey.|Department of Chemistry, A.K. Education Faculty, Necmettin Erbakan University , Konya, 42090, Turkey.
authors: Erhan
authors: E
authors: Zor
authors: ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain.
authors: Eden
authors: E
authors: Morales-Narváez
authors: ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain.
authors: Alejandro
authors: A
authors: Zamora-Gálvez
authors: Department of Chemistry, A.K. Education Faculty, Necmettin Erbakan University , Konya, 42090, Turkey.
authors: Haluk
authors: H
authors: Bingol
authors: Advanced Technology Research and Application Center, Selcuk University , Konya, 42030, Turkey.
authors: Mustafa
authors: M
authors: Ersoz
authors: ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain.|ICREA-Catalan Institution for Research and Advanced Studies , Barcelona, 08010, Spain.
authors: Arben
authors: A
authors: Merkoçi
mesh_terms: D015374:Biosensing Techniques; D006108:Graphite / Q000737:chemistry*; D008280:Magnetics; D054802:Molecular Imprinting; D010575:Pesticides / Q000032:analysis*; D056951:Photoelectron Spectroscopy; D011108:Polymers / Q000737:chemistry; D011758:Pyrroles / Q000737:chemistry; D045663:Quantum Dots / Q000737:chemistry* / Q000648:ultrastructure; D012623:Seawater / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D014220:Trialkyltin Compounds / Q000032:analysis
chemical_list: D010575:Pesticides; D011108:Polymers; D011758:Pyrroles; D014220:Trialkyltin Compounds; C067635:polypyrrole; C011559:tributyltin; D012822:Silicon Dioxide; D006108:Graphite
keywords: graphene quantum dots; magnetic silica beads; molecularly imprinted polymer; multifunctional composite; small molecule detection