Digital Microscopes
Observation and Measurement of Nanofibers Using Digital Microscopes
This section introduces examples of observation of nanofibers using a digital microscope.
Nanofibers are extremely fine fibers with a diameter less than 100 nm. Reducing the fiber size to nanometers provides new functions such as antimicrobial properties, ultrafine particle trapping performance, and the slip flow effect (higher breathability).
Nanofiber Definition
A : Nanofiber B : Ultraviolet C : Visible light D : Infrared
E : Virus F : Bacteria G : Hair root H : Microfiber
Nanofibers are defined as fibrous materials with a diameter from 1 nm to 100 nm and a length of 100 times or more the diameter.
Nanofiber Materials and Types
Nanofibers come in various types that can be classified according to the material. A variety of applications make use of their different properties.
Major nanofiber types
| Type | Material |
|---|---|
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Polypropylene, polyethylene terephthalate |
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Cellulose, chitin |
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Carbon nanotube |
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Metal (iron, aluminum, copper, nickel, silver, etc.) |
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Silica |
Effects of Nanofibers
- High-performance filters with low pressure losses can be manufactured due to the slip flow effect.
- Large specific surface areas provide high adsorption performance.
- High sound absorption effect and thermal insulation effect
- Nanofibers are light but strong, which allow them to be used in place of metal materials.
What is Cellulose Nanofiber (CNF)?
Cellulose nanofibers (CNFs) are biomass produced by reducing the size of cellulose, derived from plant fibers, to nano-order size which is several hundred times smaller than a micrometer. CNFs are characterized by low environmental load caused by manufacturing and disposal because they are derived from plant. They also offer light weight, high strength, and high anti-expansion properties and are used for a wide range of products including automobiles, home appliances, and building materials.
Nanofiber Observation Examples Using Digital Microscopes
These are the latest examples of observation of nanofibers using KEYENCE’s VHX Series 4K Digital Microscope.
Observation of a nanofiber filter surface
Using the adjustable illumination attachment allows for clear observation of each fiber.
VH-Z20, 200×, ring illumination
Ring illumination + adjustable illumination attachment
Observation of nanofibers
VHX-E500, 500×, ring partial illumination
Colors can be evaluated, which is difficult with SEMs.
Observation of carbon nanofibers
VH-Z500, 2000×, coaxial illumination
Left : With depth composition Right : Without depth composition
The depth composition function allows for in-focus observation of even deep fibers.
Observation of nanofibers
ZS-200, 200×, ring illumination + adjustable illumination attachment
