Nondestructive microparticle analysis method

Abstract

We present a study of the nonlinear dynamics of charged microparticles in a linear electrodynamic trap at normal pressure and temperature. In this work, will be considered a mathematical modeling of the nonlinear dynamics of a microparticle under viscous friction conditions, as well as experimental confirmation of theoretical results. Based on theoretical and experimental findings, we propose an innovative method for determining charge, mass and size of a certain microparticle localized in the linear electrodynamic trap.

Optical excitation and control of extended orbits in quadrupole traps

“…One of such effects is the formation of the so-called extended orbitstwo-dimensional quasi-periodic oscillations, the spectrum of which is characterized by harmonics with frequencies that are multiples of half of the frequency of the alternating confining field of the trap [2,3]. The formation of expanded orbits is associated with the transition from laminar to turbulent motion in the event of a nonlinear dissipation of energy on the buffer gas [4]. Being a typical artifact of non-linear dynamics, expanded orbits can be used to characterize localized charged particles: nondestructive determination of charge, mass and size [3].…”

“…The optical monitoring of expanded orbits can be used for non-destructive determination of the parameters of a single charged particle by analogy with the NDI method [4]. This fact seems to be especially important in the case of studying nanosized particles, where the implementation of nonlinear energy dissipation is limited [3].…”

Электродинамическая Ловушка Для Микрочастиц С Поворотным Тороидальным Электродом

“…Радиочастотные и электродинамические ловушки наряду с оптическим пинцетом получили распространение в биологических приложениях. Современные методы масс-спектрометрии для микрочастиц позволяют определять массу, заряд и другие характеристики биологических объектов [6][7][8][9].…”