Determination of the structure and composition of Au-Ag bimetallic spherical nanoparticles using single particle ICP-MS measurements performed with normal and high temporal resolution

Porosity determination of nano- and sub-micron particles by single particle inductively coupled plasma mass spectrometry

“…Through the evaluation of the signal histograms, the technique can provide information about the presence, size distribution, number concentration, elemental or isotopic composition of nanoparticles [21][22][23][24]. In our previous studies, we demonstrated that not only single component or homogenous (random) alloy spherical NPs can be analyzed, and additional information, such as the structure and aspect ratio, can also be obtained by the spICP-MS method [25,26]. The spICP-MS analysis is fast (takes only a couple of minutes) and the required sample volume is small (a few mL).…”

“…Details of the spICP-MS particle size calibration and data evaluation were described in our previous works (e.g. [23,25,26] The surface area per unit volume (S/V) and the specific surface area (a s ) values were determined as:…”

“…In our study, silver shelled gold NPs in two sizes were analyzed by spICP-MS. To quantify the amount of silver (shell) contained in the particles, spICP-MS size calibration was carried out using standard NP dispersions according to the method described earlier [26]. Volume of the shell can be thus calculated from the calibration plot, and hence, ϕspICP-MS can be determined by dividing the measured Vshell by the certified Vtotal.…”

A Rapid Detection Method for On-site Screening of Estazolam in Beverages with Au@Ag Core-shell Nanoparticles Paper-based SERS Substrate

“…For this structure, although Ag + is tightly packed on the surface of Au NPs, the actual distribution of Au core and the Ag shell is separated. 21 Theoretically, a bimetallic Au@Ag NP can provide a better optical response. [22][23][24] For ease of storage and application, we also used Langmuir technology to assemble Au@Ag NPs onto filter paper for use as the final SERS detection substrate.…”

ICP-MS alapú mérési módszerek fejlesztése összetett nanorészecskék vizsgálatára

“…A 12. ábra jó közelítéssel monodiszperz nanorészecskék átlagolt időfüggő jelprofilját szemlélteti. A kiértékelés során ezen felszeletelt jelsorozatok külön-külön történő integrálása a feladat, amely végül megadja a detektált individuális nanorészecskék tömegével arányos beütésszámát [73,78]. A nagy időfelbontású mérések segítségével elméletben akár egy részecskén belül egynél több (néhány) izotóp detektálása is megvalósítható [79].…”