Topic: scanning-electron-microscope

Backscattered electron imaging explained

By Karl Kersten - Oct 4, 2018

 Backscattered electrons (BSEs) are generated by elastic scattering events. When the electrons in the primary beam travel close to the atom’s nuclei in the specimen, their trajectory is deviated due to the force they feel with the positive charges in the nuclei. Depending on the size of the atom nuclei, the number of backscattered electrons differs. This is the basic principle of BSE image contrast. In this blog we introduce the backscattering coefficient and explain how it is influenced by the inclination of the sample and the primary beam energy.

 Backscattered electrons (BSEs) are generated by elastic scattering events. When the electrons in the primary beam travel close to the atom’s nuclei in the specimen, their trajectory is deviated due to the force they feel with the positive charges in the nuclei. Depending on the size of the atom nuclei, the number of backscattered electrons differs. This is the basic principle of BSE image contrast. In this blog we introduce the backscattering coefficient and explain how it is influenced by the inclination of the sample and the primary beam energy.

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Backscattered electron images: how to improve their quality

By Karl Kersten - Sep 21, 2018

Backscatter electrons (BSEs) carry information on the material of the sample. Obtaining high-quality images with a backscattered electron detector depends on many factors, such as the conductivity of the sample, its morphology and composition, the type of BSE detector and the electronics. Given a fixed system with the same detector and electronics— and the same sample, we analyzed the factors that play a role in the quality of a BSE image. Beginning with the number of integrating frames and beam intensity, in this blog we will also discuss the roles of the working distance and the chamber pressure.

Backscatter electrons (BSEs) carry information on the material of the sample. Obtaining high-quality images with a backscattered electron detector depends on many factors, such as the conductivity of the sample, its morphology and composition, the type of BSE detector and the electronics. Given a fixed system with the same detector and electronics— and the same sample, we analyzed the factors that play a role in the quality of a BSE image. Beginning with the number of integrating frames and beam intensity, in this blog we will also discuss the roles of the working distance and the chamber pressure.

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Tungsten vs. CeB6 electron source: Choosing the right desktop SEM

By Wouter - Sep 13, 2018

Considering a desktop scanning electron microscope (SEM)? If so, then it is important to determine what type of electron source fits your needs, since it has a direct effect on the quality of your output. In this blog, we'll therefore describe compare a Tungsten electron source with a CeB6 electron source. Read on to learn to discover which electron source is most suitable for a desktop SEM.

Considering a desktop scanning electron microscope (SEM)? If so, then it is important to determine what type of electron source fits your needs, since it has a direct effect on the quality of your output. In this blog, we'll therefore describe compare a Tungsten electron source with a CeB6 electron source. Read on to learn to discover which electron source is most suitable for a desktop SEM.

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STOP outsourcing your scanning electron microscopy research — get your own SEM!

By Karl Kersten - Sep 6, 2018

Are you a lab operator who wants to stop outsourcing your scanning electron microscopy jobs and buy your own Scanning Electron Microscope? Then you’ve probably already calculated that a personal SEM is a worthwhile capital investment. But the operational costs of SEM are just as important too: all the ongoing equipment expenses related to an SEM like the facilities, its maintenance, and operators.

Are you a lab operator who wants to stop outsourcing your scanning electron microscopy jobs and buy your own Scanning Electron Microscope? Then you’ve probably already calculated that a personal SEM is a worthwhile capital investment. But the operational costs of SEM are just as important too: all the ongoing equipment expenses related to an SEM like the facilities, its maintenance, and operators.

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Buying a scanning electron microscope: how to select the right SEM

By Karl Kersten - Aug 2, 2018

You want to buy a new scanning electron microscope (SEM) because you know you need more SEM capability. Maybe you have a traditional floor model SEM, but it is slow and complicated to operate. Maybe you are using an outside service and the turn-around time is unacceptably long.

You’ve made your case that your company could significantly improve their business performance and you could do your job better if SEM imaging and analysis were easier, faster and more accessible. Can a desktop SEM do what you need? This article provides the answers and helps you to select the right SEM.

You want to buy a new scanning electron microscope (SEM) because you know you need more SEM capability. Maybe you have a traditional floor model SEM, but it is slow and complicated to operate. Maybe you are using an outside service and the turn-around time is unacceptably long.

You’ve made your case that your company could significantly improve their business performance and you could do your job better if SEM imaging and analysis were easier, faster and more accessible. Can a desktop SEM do what you need? This article provides the answers and helps you to select the right SEM.

Read more

EDX analysis with a scanning electron microscope (SEM): how does it work?

By Antonis Nanakoudis - Jun 21, 2018

Scanning electron microscopes (SEMs) employ electron beams in order to get information from a sample at the nanoscale. The main type of signals that are detected are the backscattered (BSE) and secondary electrons (SE), which generate a grayscale image of the sample at very high magnifications. However, there are many other signals which can be a product of the electron-matter interaction, and these can provide additional information about the sample. In this blog we will describe how energy-dispersive X-ray (EDX or EDS) analysis works on a SEM.

Scanning electron microscopes (SEMs) employ electron beams in order to get information from a sample at the nanoscale. The main type of signals that are detected are the backscattered (BSE) and secondary electrons (SE), which generate a grayscale image of the sample at very high magnifications. However, there are many other signals which can be a product of the electron-matter interaction, and these can provide additional information about the sample. In this blog we will describe how energy-dispersive X-ray (EDX or EDS) analysis works on a SEM.

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What is SEM? Scanning electron microscope technology explained

By Antonis Nanakoudis - Jun 7, 2018

Scanning electron microscopy (SEM) has become a powerful and versatile tool for material characterization. This is especially so in recent years, due to the continuous shrinking of the dimension of materials used in various applications. In this blog, we explain what SEM is and describe the main working principles of a SEM instrument.

Scanning electron microscopy (SEM) has become a powerful and versatile tool for material characterization. This is especially so in recent years, due to the continuous shrinking of the dimension of materials used in various applications. In this blog, we explain what SEM is and describe the main working principles of a SEM instrument.

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Battery research with a SEM: inspecting one layer at a time

By Luigi Raspolini - May 31, 2018

Batteries revolutionized the world of electronics by enabling us to carry an energy reserve in our pockets. Miniaturization and efficiency are the two key words when it comes to new developments in this field, impacting with the battery materials’ properties and stretching their limits. Let’s take a look at how researchers characterize materials and gather relevant information about batteries using scanning electron microscopy (SEM).

Batteries revolutionized the world of electronics by enabling us to carry an energy reserve in our pockets. Miniaturization and efficiency are the two key words when it comes to new developments in this field, impacting with the battery materials’ properties and stretching their limits. Let’s take a look at how researchers characterize materials and gather relevant information about batteries using scanning electron microscopy (SEM).

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Additive manufacturing: improving the quality of AM processes through SEM analysis

By Antonis Nanakoudis - May 17, 2018

In a previous blog, we introduced Additive Manufacturing (AM) as a new manufacturing approach and described its key points (you can read the blog here). Additive Manufacturing, also known as 3D printing or rapid prototyping, has attracted the attention of many people and industries around the world due to its unlimited and promising potential. In this blog we will describe how the use of a Scanning Electron Microscope (SEM) can be a powerful tool to monitor and improve the quality of additive manufacturingprocesses.

In a previous blog, we introduced Additive Manufacturing (AM) as a new manufacturing approach and described its key points (you can read the blog here). Additive Manufacturing, also known as 3D printing or rapid prototyping, has attracted the attention of many people and industries around the world due to its unlimited and promising potential. In this blog we will describe how the use of a Scanning Electron Microscope (SEM) can be a powerful tool to monitor and improve the quality of additive manufacturingprocesses.

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Effective asbestos detection with a Scanning Electron Microscope (SEM)

By Luigi Raspolini - May 10, 2018

Resistance to fire, sound absorption, tensile strength and low price caused a boost in asbestos mining activities at the beginning of 19th century.

Already used in the production of asphalt, brake pads, electrical insulators, fireproof suits, technical fabrics and other everyday products, asbestos started its golden century when the Austrian engineer Ludwig Hatschek invented the first asbestos-cement, often mistakenly referred to as Eternit.

The material properties, particularly its lightness and resilience, started a real revolution in the construction engineering and asbestos-cements factories, which immediately emerged all over the world.

Resistance to fire, sound absorption, tensile strength and low price caused a boost in asbestos mining activities at the beginning of 19th century.

Already used in the production of asphalt, brake pads, electrical insulators, fireproof suits, technical fabrics and other everyday products, asbestos started its golden century when the Austrian engineer Ludwig Hatschek invented the first asbestos-cement, often mistakenly referred to as Eternit.

The material properties, particularly its lightness and resilience, started a real revolution in the construction engineering and asbestos-cements factories, which immediately emerged all over the world.

Read more

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