基于微腔模式展宽速率法的纳米颗粒浓度测量

The Measurement of Nanoparticle Concentrations by the Method of Microcavity Mode Broadening Rate.

作者信息

Ivanov Alexey, Min Kov Kirill, Samoilenko Alexey, Levin Gennady

机构信息

The All-Russian Research Institute for Optical and Physical Measurements, 119361 Moscow, Russia.

Russian Quantum Center, 143025 Moscow, Russia.

出版信息

Sensors (Basel). 2020 Oct 21;20(20):5950. doi: 10.3390/s20205950.

DOI:10.3390/s20205950

PMID:33096870

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7588910/

Abstract

A measurement system for the detection of a low concentration of nanoparticles based on optical microcavities with whispering-gallery modes (WGMs) is developed and investigated. A novel method based on the WGM broadening allows us to increase the precision of concentration measurements up to 0.005 ppm for nanoparticles of a known size. We describe WGM microcavity manufacturing and quality control methods. The collective interaction process of suspended Ag nanoparticles in a liquid and TiO in the air with a microcavity surface is studied.

摘要

开发并研究了一种基于具有回音壁模式（WGMs）的光学微腔来检测低浓度纳米颗粒的测量系统。一种基于WGM展宽的新方法使我们能够将已知尺寸纳米颗粒浓度测量的精度提高到0.005 ppm。我们描述了WGM微腔的制造和质量控制方法。研究了液体中悬浮的银纳米颗粒以及空气中的二氧化钛与微腔表面的集体相互作用过程。