RESUMEN
We describe the fabrication of highly sensitive graphene based field effect transistor (FET) biosensors with a cost-effective approach and their application in label-free Deoxyribonucleic acid (DNA) detection. Chemical vapor deposition (CVD) grown graphene layers were used to achieve mass production of FET devices via conventional photolithographic patterning. Non-covalent functionalization of the graphene layer with 1-Pyrenebutanoic acid succinimidyl ester ensures high conductivity and sensitivity of the FET device. The present device could reach a detection limit as low as 3 x 10(-9) M.
Asunto(s)
Técnicas Biosensibles/métodos , ADN/análisis , Grafito/química , Microscopía de Fuerza Atómica , Nanotecnología , Procesos FotoquímicosRESUMEN
A simple solvothermal method has been discovered to synthesize single-walled flux-closure Ni-Co magnetic alloy nanorings in high yield, which are directly fabricated in a reaction solution and able to chronically exist in solution.