Analysis of gold nanoparticles in a hydrocarbon solvent by single particle-inductively coupled plasma mass spectrometry (spICP-MS) and TEM

Nelson, Jenny; Saunders, Aaron E.; Poirier, L.; López-Linares, Francisco

doi:10.1007/s42452-020-04054-6

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…To our knowledge, only a few applications of NP investigation using spICP-MS in organic media have been published until now. − None of these include alcoholic matrices, highlighting the need for further research on new methods, especially for highly reactive, water-sensitive particles. Past organic solvents used for spICP-MS were o-xylene, , toluene, , tetrahydrofuran, mesitylene, and dodecanethiol . In this study, we present an innovative spICP-MS method for quantifying the physical properties of NPs and colloids in pure ethanol, namely, NP size distributions and the order of magnitude in PNC differentiated by elemental content and NP composition.…”

Section: Introductionmentioning

confidence: 99%

“…Little attention has been paid to the development of spICP-MS methods for matrices other than water. To our knowledge, only a few applications of NP investigation using spICP-MS in organic media have been published until now. − None of these include alcoholic matrices, highlighting the need for further research on new methods, especially for highly reactive, water-sensitive particles. Past organic solvents used for spICP-MS were o-xylene, , toluene, , tetrahydrofuran, mesitylene, and dodecanethiol .…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Nanoparticles in Ethanolic Suspension Using Single Particle Inductively Coupled Plasma Mass Spectrometry: Application for Cementitious Systems

Hellmann,

Gil-Díaz,

Böhm

et al. 2024

ACS Omega

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Single particle inductively coupled plasma mass spectrometry (spICP-MS) is a well-established technique to characterize the size, particle number concentration (PNC), and elemental composition of engineered nanoparticles (NPs) and colloids in aqueous suspensions. However, a method capable of directly analyzing water-sensitive or highly reactive NPs in alcoholic suspension has not been reported yet. Here, we present a novel spICP-MS method for characterizing the main cement hydration product, i.e., calcium-silicate-hydrate (C-S-H) NPs, in ethanolic suspensions, responsible for cement strength. The method viability was tested on a wide range of NP compositions and sizes (i.e., from Au, SiO 2 , and Fe 3 O 4 NP certified reference materials (CRMs) to synthetic C-S-H phases with known Ca/Si ratios and industrial cement hardening accelerators, X-Seed 100/500). Method validation includes comparisons to nanoparticle tracking analysis (NTA) and transmission/scanning electron microscopy (TEM/SEM). Results show that size distributions from spICP-MS were in good agreement with TEM and NTA for CRMs ≥ 51 nm and the synthetic C-S-H phases. The X-Seed samples showed significant differences in NP sizes depending on the elemental composition, i.e. CaO and SiO 2 NPs were bigger than Al 2 O 3 NPs. PNC via spICP-MS was successfully validated with an accuracy of 1 order of magnitude for CRMs and C-S-H phases. The spICP-MS Ca/Si ratios matched known ratios from synthetic C-S-H phases (0.6, 0.8, and 1.0). Overall, our method is applicable for the direct and element-specific quantification of fast nucleation and/or mineral formation processes characterizing NPs (ca. 50−1000 nm) in alcoholic suspensions.

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