Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов (Dec 2020)
DETERMINATION OF OPTIMAL MODES FOR MEASURING THE SIZE OF COLLOIDAL PARTICLES BY PHOTON-CORRELATION SPECTROSCOPY AND ACOUSTIC SPECTROSCOPY
Abstract
This paper presents the results of measuring the size of colloidal SiO2 particles by two methods – photon-correlation spectroscopy of dynamic light scattering and acoustic spectroscopy. Mathematical processing of experimental data using the software of the Photocor-Complex and DT-1202 spectrometers made it possible to obtain of the size distribution histograms for silicon dioxide colloidal particles in a standard sample. For the first time it has been established that the optimal parameters for measuring the size of colloidal SiO2 particles by the photon-correlation spectroscopy are the substance concentration less than 1 %, the photodetector position angle of 90 degrees and the number of measurements in a cycle of 100 - 150, and for the acoustic spectroscopy – 1 % substance concentration.
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