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The Inherent Electrochemistry of Nickel/Nickel‐Oxide Nanoparticles
Author(s) -
Giovanni Marcella,
Ambrosi Adriano,
Pumera Martin
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201101024
Subject(s) - nickel oxide , non blocking i/o , nickel , nanoparticle , electrochemistry , materials science , cyclic voltammetry , electrochemical gas sensor , oxide , biosensor , electrode , inorganic chemistry , nanotechnology , chemical engineering , chemistry , metallurgy , catalysis , organic chemistry , engineering
The direct detection of nanoparticles is at the forefront of research owing to their environmental and toxicological applications. Herein, we studied the inherent electrochemistry of Ni and NiO nanoparticles and proposed a simple and direct electrochemical method for the determination of the concentrations of both nickel (Ni) and nickel oxide (NiO) nanoparticles in alkaline solution. A highly sensitive voltammetry technique was used to measure the oxidative signal of Ni(OH) 2 that formed spontaneously on the surface of Ni and NiO nanoparticles in alkaline media. Detection limits of 220 μg mL −1 for Ni and 13 μg mL −1 for NiO nanoparticles were obtained. Ni and NiO nanoparticles are used as electrode modifiers or as electrochemical signal labels in various biosensing applications. Therefore, methods to rapidly quantify the amount of Ni and NiO nanoparticles are of widespread potential use.