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The Bombay Textile
Research Association

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Research Association

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Scanning Electron Microscope (SEM)

INTRODUCTION

The Scanning Electron Microscope (SEM) allows visualization of surface features of a solid sample by scanning through an electron beam. SEM has better resolution capability and depth of field than a light microscope. Therefore, good quality three-dimensional like images are obtained.

In advanced JEOL JSM IT 200 SEM machine, magnification ranges from 10X to 3, 00,000X and resolution of about 10 nm. The surface view and cross-sectional view of the sample can be easily observed. In addition, the elemental composition and mapping of any solid material can be found out by EDX analysis.

Samples from textile, pharmaceutical, ceramic, polymer, metal and other allied industries can be tested on this SEM machine.
Samples which can be Analyzed

A wide range of materials whose morphology can be routinely analyzed include:
Metals, Glass, Ceramics and Polymers
Semiconductors
Plastics
Fibers (Textile, Glass, Asbestos, Natural)
Powders and Dust
Pharmaceutical powder, pellets, capsules
Samples can be analyzed provided these are vacuum compatible and not damaged by heat produced by electron beams.

Range of Applications
Examination of surface morphology
Defect analysis of textile materials
Cross-section and longitudinal imaging of filaments/yarns
Powder morphology, particle size and analysis

FREQUENTLY ASKED QUESTIONS (FAQ)

It is about the shape, size, textures and features present on the sample surface.
No, the gold/silver coating is too thin to hide the sample morphology.
Samples which contain volatile liquids can be analyzed.
SEM provides micrographs with scales which can be used to get some quantitative information like the distance between two points on the micrograph. It can also be used to find the pore size, shape of a feature. But, it does not provide topographical height information like AFM does.
We can see the pore size and its shape but for the quantitative determination of degree of porosity other kind of tests is required.
SEM originally gives black and white images. Nowadays, some feature extracting softwares are used to generate color of the sample surface features.
Kindly call our laboratory manager at the following ‘contact us’ for further details.

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