Device and method for measuring nanotube geometric dimensions based on photon counting

Abstract

The invention provides a nanotube geometric dimension measuring device and method based on photon counting, and is characterized in that the measuring device includes a light beam focusing unit that includes a light source and a lens, a Raman scattering unit that includes an optical filtering component and a first photoelectric conversion element, a depolarization dynamic scattering unit that includes a beam splitter prism, a second photoelectric conversion element and a third photoelectric conversion element, and an information analysis and processing unit that includes a photon counting card used for counting electric pulse signals to obtain a count value and a computer connected with the photon counting card and processes and analyzes the count value to obtain the diameter and length of a nanotube. The nanotube geometric dimension measuring device and method based on photon counting combines a depolarization dynamic scattering method with a Raman spectrum method, can not only make up for the defect that the depolarization dynamic light scattering measuring range is insufficient, but can also overcome the defect that the Raman spectrum method cannot measure the length of a nanotube, and is fast in measurement, low in cost and high in accuracy.

Description

technical field [0001] The invention relates to a measurement technology, in particular to a photon counting-based nanotube geometric size measurement device and method. Background technique [0002] Nanotubes have good electronic properties, mechanical properties, thermal properties, mechanical properties, and optical properties. They have broad application prospects in many fields such as medical science, medical equipment, microelectronics preparation, instrument manufacturing, and polymer development. The excellent characteristics of nanotubes are directly related to the diameter and length of nanotubes. Therefore, the research on nanotube diameter and length measurement is of great significance. [0003] At present, the measurement methods of nanotube diameter and length mainly adopt the following methods: [0004] Technical measurement methods based on microscope imaging, including: transmission electron microscope (TEM), atomic force microscope (AFM), etc. The char...

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Problems solved by technology

[0007] The present invention is carried out in order to solve the above problems, and the purpose is to provide a method that can not only make up for the insufficient measurement range of depolarized dynamic light scattering, but also solve the shortcoming that Raman spectroscopy cannot measure the length of nanotubes, and has fast measurement, low cost, Device and method for measuring nanotube geometric dimensions based on photon counting with high precision

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