Simultaneous mass and capacitance change measurement for defining nanoparticles such as nanoplastic, virus, by determining their size and material properties at the particle level

An analysis method for simultaneously determining the size and material properties of nanoparticles, comprising the following process steps:

• measuring the mass of a nanoparticle (mparticle) with a mass sensor in a common precise measurement region of the mass sensor and a capacitor sensor,
• in the same system, of measuring a capacitance change (AC) formed by the same nanoparticle by the capacitor sensor in the common precise measurement region of the mass sensor and capacitor sensor, according to Formula 3:
• Δ
• ⁢
• C
• =
• (
• C
• 0
• ϵ
• 0
• ⁢
• V
• 0
• )
• ⁢
• V
• particle
• ×
• (
• 3
• ×
• ϵ
• r
• -
• 1
• ϵ
• r
• +
• 2
• )
• Formula
• ⁢
• 3
• wherein, ΔC is the capacitance change created by the nanoparticle in the capacitor sensor, c0 is the pre-measurement capacitance of the capacitor sensor, ϵ0 is the electrical permittivity of empty space, ϵr is the relative dielectric coefficient of the particle, v0 is the active measurement volume of the capacitor sensor,
• calculating the Cparticle value, which is the capacitance change normalized by a processor in electronic mobile devices by scaling the quantity AC measured according to the formula 3 according to the characteristics of the capacitor sensor, and dividing the same by the expression
• (
• C
• 0
• ϵ
• 0
• ⁢
• V
• 0
• )
• :
• C
• particle
• ≡
• Δ
• ⁢
• C
• (
• C
• 0
• ϵ
• 0
• ⁢
• V
• 0
• )
• Formula
• ⁢
• 4
• processing the signal ratio of the nanoparticle by the processor in electronic mobile devices according to Formula 1 by taking the ratio of the of the nanoparticle to the normalized capacitance change (Cparticle) of the nanoparticle, determining the same and obtaining a factor based on the nanoparticle's density (dparticle) and the relative dielectric coefficient (ϵr),
• Signal
• ⁢
• Ratio
• ≡
• m
• particle
• C
• particle
• =
• d
• particle
• (
• 3
• ×
• ϵ
• r
• -
• 1
• ϵ
• r
• +
• 2
• )
• Formula
• ⁢
• 1
• determining the material property of the nanoparticle according to the signal ratio of the nanoparticle calculated by said processor according to the formula 1.