Register now for the 2020 NEMI Event!

The Netherlands Electron Microscopy Infrastructure (NEMI) team is excited to announce the annual NEMI Event, which will be held on November 25th, 13:00-16.15 on Zoom. We want to bring together the different EM disciplines united in NEMI, highlight the work of young scientists and create a platform for collaboration and exchange. We start with two interdisciplinary keynote lectures, followed by a presentation of the NEMI Courses & Outreach team, an online poster session, and the presentation of the first NEMI photo award.

Register here for the 2020 NEMI Event!

Cover article on new technique for ultrafast electron microscopy

Mathijs Garming, Pieter Kruit, and Jacob Hoogenboom (TUD – Imaging Physics) have published a paper in collaboration with Maarten Bolhuis and Sonia Conesa-Boj (TUD – Quantum Nanoscience) on a new technique for doing ultrafast scanning electron microscopy (USEM).

Newly developed lock-in USEM was used to image charge carrier dynamics on the material Gallium Arsenide. The technique allows for bulk carrier and surface trapping dynamics to be separated and individually studied. Marked differences in surface potential were found with different surface termination of the material, while only the top atomic layer was different!

These results can help gain further insight in carrier dynamics and trapping, and be beneficial to the development of cutting edge new solar cells and photodetectors.

The work has been published open access in the Journal of Physical Chemistry Letters.


“Visualizing charge carrier flow over interfaces or near surfaces meets great challenges concerning resolution and vastly different time scales of bulk and surface dynamics. Ultrafast or four-dimensional scanning electron microscopy (USEM) using a laser pump electron probe scheme circumvents the optical diffraction limit, but disentangling surface-mediated trapping and ultrafast carrier dynamics in a single measurement scheme has not yet been demonstrated. Here, we present lock-in USEM, which simultaneously visualizes fast bulk recombination and slow trapping. As a proof of concept, we show that the surface termination on GaAs, i.e., Ga or As, profoundly influences ultrafast movies. We demonstrate the differences can be attributed to trapping-induced surface voltages of approximately 100–200 mV, which is further supported by secondary electron particle tracing calculations. The simultaneous visualization of both competing processes opens new perspectives for studying carrier transport in layered, nanostructured, and two-dimensional semiconductors, where carrier trapping constitutes a major bottleneck for device efficiency.”

Read the article here:

M.W.H. Garming et al., Lock-in Ultrafast Electron Microscopy Simultaneously Visualizes Carrier Recombination and Interface-Mediated Trapping. The Journal of Physical Chemistry Letters 2020, 11, 8880-8886. DOI: 10.1021/acs.jpclett.0c02345.

Job opening: Account Manager Life Sciences SVI

Scientific Volume Imaging is a world leader in microscopy image processing software located in Hilversum. Because of a growing market for our Huygens software, we’re looking for new enthusiastic colleagues who enjoy working in a fast-moving market.

If you have experience in image processing and/or microscopy, are truly interested in a commercial position, and enjoy working with customers from life-science institutes worldwide, you’re the person we’re looking for. You are a team-player who enjoys taking responsibility for direct sales, stays in close contact with our customers and enjoys learning on the job.

More information can be found here:

Announcement: NEMI Photo Competition

UPDATE: The deadline is extended until November 18th!

The Netherlands Electron Microscopy Infrastructure (NEMI) hereby announces the 2020 Photo Competition. We invite you to submit your best EM image through this form. This is a chance to showcase the stunning beauty of your electron microscopy work in the Material and Life Sciences! 

Deadline for submission is November 13th, and the winners will be announced at the 2020 NEMI Day (note November 25 in your calendar, more info will follow soon). There will be prizes for the top-3 images, and the best 12 images will be used to create a NEMI calendar that will be handed out to the entire NEMI community.

Please go and find your best pictures ever and spread the word among your contacts and interested parties!

Online resources/courses recommended by NEMI

Online Courses/Resources on Microscopy

Online Courses on Image Analysis

  • Image Processing and Analysis for Life Scientists EPFL

  • Basics of Image processing and analysis in ImageJ

Lecture BioImage Analysis 2020

  • Fiji Scripting Tutorial

  • Icy tutorials

  • Image Processing Forum

  • Image processing with Python advanced

  • Unix, R and Python tools for genomics and data science     

  • Ilastik Tutorials

  • Data Science in Cell Imaging

  • Computational image processing in microscopy

Webinar Series: Imaris Homeschool

Advanced Microscopy Webinars

  • Webinars by Picoquant

  • Webinars by BiteSizeBio

Electron Microscopy Resources 

Start with:

EM history:

EMBO workshop

In situ Structural Biology – From Cryo-EM to Integrative Modelling 6 – 8 December 2020