A 3D carbon black disposable electrochemical sensor modified with reduced graphene oxide used for the sensitive determination of levofloxacin

Abstract

In this work, is presented a simple method for the fabricating an electrochemical sensor using a conductive carbon black and polylactic acid-based filament (3D-CB/PLA) printed with a 3D-pen is presented....

Co(O)4(N)‐type single‐atom‐based catalysts and ligand‐driven modulation of electrocatalytic properties for reducing oxygen molecules

“…The Lewis basic N atoms could be binding sites for Lewis acidic Co‐containing components. A scanning electron microscope (SEM) image of NrGO shows the aggregated nanoplatelets, which is a typical characteristic of reduced graphene oxide materials (Figure ) 21–23 . A transmission electron microscopy (TEM) image of NrGO reveals the presence of thin platelets in amorphous characteristics (Figure ).…”

“…A scanning electron microscope (SEM) image of NrGO shows the aggregated nanoplatelets, which is a typical characteristic of reduced graphene oxide materials (Figure S1). [21][22][23] A transmission electron microscopy (TEM) image of NrGO reveals the presence of thin platelets in amorphous characteristics (Figure S1). The Brunauer-Emmett-Teller (BET) surface area of NrGO was as high as 444 m 2 /g (Figure S2 and see Supporting Information S1 for further data).…”

Electrochemical monitoring of levofloxacin using a silver nanoparticle-modified disposable device based on a lab-made conductive ink

“…19 Different strategies for the development of low-cost devices used for LEV monitoring have been addressed in the literature, such as pencil graphite electrodes, 20,21 screen-printed electrodes, 22 carbon paste electrodes, 23,24 and 3D-printed electrodes. 25 Nevertheless, to the best of our knowledge, paper sensors modied with nanostructured materials such as silver have not been reported. Therefore, the main objective of this work was to develop a disposable electrochemical device (DED) combining the immobilization of a lab-made CI based on graphite powder and nail polish on a rigid polyvinyl chloride sheet platform and, modify it with electrochemically deposited silver nanoparticles (AgNPs-DED) to perform LEV monitoring in pharmaceutical formulation, synthetic urine, and synthetic human plasma samples by differential pulse voltammetry (DPV).…”