Topic: scanning-electron-microscope

How scanning electron microscopy fuels biomedical research

By Karl Kersten - March 15, 2018

Biomedical research is a wide field. It describes an area of science devoted to the study of the processes of life, the prevention and treatment of diseases, and the genetic and environmental factors related to diseases and health. And since the field is so diverse, its range of investigation equipment is too. Scanning electron microscopy (SEM) is one of those types of equipment, and is used to describe tissue or organ structures to gain insights into possible alterations and diseases. To show the variety of topics explored with a SEM — demonstrating its power and vast range of applications — this blog will introduce you to three scientific studies.

 

Biomedical research is a wide field. It describes an area of science devoted to the study of the processes of life, the prevention and treatment of diseases, and the genetic and environmental factors related to diseases and health. And since the field is so diverse, its range of investigation equipment is too. Scanning electron microscopy (SEM) is one of those types of equipment, and is used to describe tissue or organ structures to gain insights into possible alterations and diseases. To show the variety of topics explored with a SEM — demonstrating its power and vast range of applications — this blog will introduce you to three scientific studies.

 

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Emission stability in SEM thermionic electron sources: CeB6, LaB6 and W filaments

By Karl Kersten - February 1, 2018

Typically, desktop scanning electron microscopes (SEM) make use of thermionic sources, from which electrons are emitted when warming up the SEM filament. Although the working principles are the same, different thermionic sources show a different performance. Phenom SEMs are equipped with a CeB6 source because of its higher brightness and longer lifetime. A parameter that plays a crucial role is the emission current stability. How is the CeB6 source performing in terms of stability? What are the engineering smarts that enable the Phenom source to maximize a CeB6 source's potential? This blog answers these questions.

Typically, desktop scanning electron microscopes (SEM) make use of thermionic sources, from which electrons are emitted when warming up the SEM filament. Although the working principles are the same, different thermionic sources show a different performance. Phenom SEMs are equipped with a CeB6 source because of its higher brightness and longer lifetime. A parameter that plays a crucial role is the emission current stability. How is the CeB6 source performing in terms of stability? What are the engineering smarts that enable the Phenom source to maximize a CeB6 source's potential? This blog answers these questions.

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Inside a scanning electron microscope: the SEM electron column explained

By Karl Kersten - December 21, 2017

Scanning electron microscopes (SEMs) use an electron beam to image samples with a resolution down to the nanometer scale. The electrons are emitted from a filament and collimated into a beam in the electron source. The beam is then focused on the sample surface by a set of lenses in the electron column. How does an electron lens work? And which kind of lenses exist? How are lenses combined to form an electron column? In this blog, we will answer these questions and give a general insight into the working principle of an electron column.

Scanning electron microscopes (SEMs) use an electron beam to image samples with a resolution down to the nanometer scale. The electrons are emitted from a filament and collimated into a beam in the electron source. The beam is then focused on the sample surface by a set of lenses in the electron column. How does an electron lens work? And which kind of lenses exist? How are lenses combined to form an electron column? In this blog, we will answer these questions and give a general insight into the working principle of an electron column.

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Is a desktop SEM the best choice for my application?

By Karl Kersten - February 9, 2017

1You 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?

1You 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?

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Optical vs. SEM: image analysis systems for particle characterization

By Jeroen Smulders - February 2, 2017

Particle characterization is an important process for many departments in manufacturing companies. If you are an operator, researcher or process engineer, you require it for R&D activities. If you are a production manager, you need it to ensure the quality of the production process. Several image analysis systems can be used for advanced particle characterization. In this blog post, we address and compare optical and Scanning Electron Microscopy (SEM) analysis equipment — and help you find out which system is the best fit for you.

Particle characterization is an important process for many departments in manufacturing companies. If you are an operator, researcher or process engineer, you require it for R&D activities. If you are a production manager, you need it to ensure the quality of the production process. Several image analysis systems can be used for advanced particle characterization. In this blog post, we address and compare optical and Scanning Electron Microscopy (SEM) analysis equipment — and help you find out which system is the best fit for you.

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