Graphene Oxide–Poly(dimethylsiloxane)-Based Lab-on-a-Chip Platform for Heavy-Metals Preconcentration and Electrochemical Detection
作者： Andrzej Chałupniak , Arben Merkoçi
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摘要: Herein, we present the application of a novel graphene oxide–poly(dimethylsiloxane) (GO–PDMS) composite in reversible adsorption/desorption, including detection heavy metals. GO–PDMS was fabricated by simple blending GO with silicon monomer presence tetrahydrofuran, followed polymerization initiated upon addition curing agent. We found concentration, agent pH, and contact time among most important factors affecting adsorption Pb(II) used as model metal. The mechanism is based on surface complexation, where oxygen active groups negative charge can bind bivalent metal ions Me(II). To demonstrate practical this material, microfluidic lab-on-a-chip platform for heavy-metals preconcentration detection. This device consists screen-printed carbon electrode, PDMS chip, chip. use significantly improves sensitivity electro...
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