THIN FILM ANALYSIS & MATERIAL SCIENCE
tec5USA Equipment Applications for Material Science
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The monitoring of the CVD manufacturing process of various types of carbon nanotubes is necessary in order to deliver a high quality product that is used for various applications.
Carbon Nanotube Analysis
Carbon nanotubes consist of a carbon sheet, with a hexagonal geometry, rolled up on itself. Depending on the amount of the twist in the tube (chirality), can have either metallic or semiconducting electronic properties. These materials can be doped with specific elements to modify its electronic properties, as well as have functional groups chemically bonded to the tube to allow for different chemical properties. Due to the unique physical and electrical properties of nanotubes, these materials are used as an additive to many processes to provide further strength, e.g., hard plastics.
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Typical applications include white light interference for thin film analysis, UV absorption of proteins for quantitative analysis, colorimetry, impurity detection in water, cleaning validation for API manufacturing, polymerization inhibitor monitoring, electroplating bath monitoring....
The spectroscopic methodology is determined by which parameters are important to monitor during a process. For example, if you want to monitor protein concentration in a bioreactor, in which the biosynthesis takes place in an aqueous medium, then you likely would want to use Raman spectroscopy for the application, as water does not contribute to the Raman signal. Alternatively, if moisture content is important, water has very strong absorption in the NIR due to several vibrational and combination modes that can be monitored; water is transparent in the UV and visible spectral region. Understanding which chemical is important as there could be various factors that influence the choice of methodology....
NIR spectroscopy is utilized across a variety of industries for qualitative and quantitative product analysis. Typical industries include Chemistry, Pharmacology, Food Feed & Beverage, Agriculture, and others. NIR spectroscopy is well suited for species containing C-H, N-H & O-H bonds, making it a wide-range technology for a variety of applications such as moisture, fat, oil, alcohol, APIs, polymers, etc....
Raman spectroscopy is a technique which is used for several markets. These industries include Oil and Gas, Pharmacology, Biotechnology, Petrochemistry and many others. Due to the high selectivity of Raman spectroscopy, it is a powerful tool for many applications including, hydrocarbon analysis, bioreactor protein monitoring, crystallization monitoring, API concentration, polymer identification, surfactant analysis, natural gas components and several others....
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