Electronic/ionic engineering inspired formation of carbon-encapsulated Cu3PSe4/Cu2Se heterostructured hollow nanosphere for trace level neurochemical monitoring

Copper Selenophosphate, Cu3PSe4, Nanoparticle Synthesis: Octadecane Is the Key to a Simplified, Atom-Economical Reaction

“…Additionally, X-ray photoelectron spectroscopy (XPS) of the carbon (C) and nitrogen (N) 1s regions (Figure S19) is representative of HDA binding environments according to previous literature reports. ,, Of note, the Cu and P 2p binding region (Figure A and B) demonstrates the characteristic Cu 3– x P environments, ,− while the satellite Cu­(II) peak (Figure B) and P–O peak at 134 eV likely corresponds to surface oxides. − , Finally, Cu 3 PSe 4 was characterized with XPS for Cu, P, Se, and C bonding environments (Figure S20). The core bonding environments (Cu, P and Se) were consistent with previous reports of Cu 3 PSe 4 and Cu 3 PS 4 , − , whereas the C region had similar peaks to Cu 3– x P NPs but a decrease in the C-NH 2 environment (Figure S20D). In summary, the spectroscopic evidence mentioned above confirms the sample purity and provides evidence for the nanoparticle surface composition, an important component of the net reaction stoichiometry.…”

Surface-Activated Pencil Graphite Electrode for Dopamine Sensor Applications: A Critical Review

“…In the past two decades, the development of electrochemical voltammetric techniques and the fabrication of low-cost modified electrodes for sensitive and selective DA estimation in body fluids has gained attention; ascorbic acid (AA) and uric acid (UA) interference-free detection of DA has been an especially challenging task [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Various chemically modified electrodes have been constructed based on organic redox mediators [ 28 ], polymers-modified electrodes [ 29 , 30 ], metal nanocomposites [ 31 , 32 , 33 ] and nanoparticle-modified electrodes [ 34 ]. This work covers detailed literature information about the nature of PGE and its activation techniques adopted in the literature for the DA electroanalysis.…”