Voltammetric, dynamic light scattering (DLS) and electrophoretic mobility characterization of FeS nanoparticles (NPs) in different electrolyte solutions

Environmental Transformations and Algal Toxicity of Single-Layer Molybdenum Disulfide Regulated by Humic Acid

“…DLS has been widely used to evaluate the stability of aspheric dimensional nanomaterials by providing the relevant lateral diameters . The speed and aggregation kinetics were evaluated using the initial aggregation rate according to the initial slope to the point where the hydrodynamic diameter ( d h ) reached a value 1.3-fold greater than the initial hydrodynamic diameter ( d h0 ) .…”

“…DLS has been widely used to evaluate the stability of aspheric dimensional nanomaterials by providing the relevant lateral diameters. 44 The speed and aggregation kinetics were evaluated using the initial aggregation rate according to the initial slope to the point where the hydrodynamic diameter (d h ) reached a value 1.3-fold greater than the initial hydrodynamic diameter (d h0 ). 45 As shown in Figure 3a, pristine SLMoS 2 and cSLMoS 2 were both unstable in aqueous media, and the average size initially increased with an aggregation rate of 0.59 ± 0.067 nm/min and 0.39 ± 0.028 nm/min, respectively.…”

Current Methods and Prospects for Analysis and Characterization of Nanomaterials in the Environment

“…In voltammetry measurements, metal-based nanoparticles produce electrochemical signals at different electrode potentials than corresponding dissolved metal species, which can be translated to the presence and concentration of nanomaterials. Voltammetric techniques, such as anodic stripping voltammetry and adsorptive cathodic stripping voltammetry, have been explored to detect a variety of nanomaterials, including metal chalcogenides (e.g., Cu x S, FeS, , and HgSe) and metallic (e.g., Au and Ag) , NPs, in artificial and natural aqueous matrices. However, the voltammetric signal is highly dependent on the composition of the aqueous matrix, including the type and composition of the electrolyte as well as the presence of electroactive dissolved metals, inorganic ligands (e.g., sulfide ions), and natural organic matter (NOM). , Moreover, the analyte selectivity of voltammetric measurement is relatively low.…”

“…Voltammetric techniques, such as anodic stripping voltammetry and adsorptive cathodic stripping voltammetry, have been explored to detect a variety of nanomaterials, including metal chalcogenides (e.g., Cu x S, FeS, , and HgSe) and metallic (e.g., Au and Ag) , NPs, in artificial and natural aqueous matrices. However, the voltammetric signal is highly dependent on the composition of the aqueous matrix, including the type and composition of the electrolyte as well as the presence of electroactive dissolved metals, inorganic ligands (e.g., sulfide ions), and natural organic matter (NOM). , Moreover, the analyte selectivity of voltammetric measurement is relatively low. For instance, nanoparticles of different metal sulfides can produce an electrochemical signal at similar redox potentials, which prevents their unambiguous identification .…”

“…However, the voltammetric signal is highly dependent on the composition of the aqueous matrix, including the type and composition of the electrolyte as well as the presence of electroactive dissolved metals, inorganic ligands (e.g., sulfide ions), and natural organic matter (NOM). 217,218 Moreover, the analyte selectivity of voltammetric measurement is relatively low. For instance, nanoparticles of different metal sulfides can produce an electrochemical signal at similar redox potentials, which prevents their unambiguous identification.…”