Open AccessИсследование чувствительной способности графена для применений в качестве биосенсоров
Author(s) -
А. С. Усиков,
S. P. Lebedev,
А.Д. Роенков,
И.С. Бараш,
С. В. Новиков,
M.В. Пузык,
А.В. Зубов,
Ю.Н. Макаров,
Alexander A. Lebedev
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.10.49421.18250
Subject(s) - graphene , materials science , fluorescein , calibration , calibration curve , chip , dynamic range , analytical chemistry (journal) , detection limit , nanotechnology , optoelectronics , fluorescence , chemistry , chromatography , optics , computer science , physics , telecommunications , quantum mechanics
. The response of the chips based on graphene films on SiC substrates (the relative change of the chip resistance) on fluorescein (C20H12O5) in a wide range of its concentrations in phosphate-buffered solution from 1 • 10-3 ng/ml, to 1 • 10+4 ng/ml (7 orders of magnitude) is studied. Detection of fluorescein seems to be a simple and cheap model experiment to study a sensing capability of the graphene in the production of biosensors. It was shown that graphene chips with wide terraces on the surface (1000-nm width and 5-nm height) made it possible to plot calibration dependences of the response of the chips on the concentration of fluorescein.