Author Archives: Ulf Nobbmann


Ulf Nobbmann received his PhD in colloidal physics from Oklahoma State University (USA) and has since focused on light scattering from biological molecules and nanoparticles. He joined Malvern Instruments in 2003, has held various positions involved in support. training, development of application knowledge & expertise within the Nanometrics group, and is currently Zetasizer Product Manager - Americas.

Published 12 Nov 2020

Zetasizer Advance in bullet points

We launched the latest generation of the Zetasizer family, the Advance series. I received variations of two questions a few times: What is so good about the new version? Can you give me some bullet points? Well, glad you asked….READ MORE >

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Published 15 Sep 2020

Fire cloud particle size – estimate it here!

How can we get the fire cloud particle size? Typically I write about nanoparticles. The current fire situation in California reminded me that the larger than nano-size range is also affecting our daily life. While smoke forms clouds we can…READ MORE >

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Published 20 Aug 2020

Can size or zeta confirm binding?

This question landed on my desk recently. “We have a Zetasizer in our lab. We have taken the size and zeta potential of a mixture of two particle types. I am wondering to what extent the zeta potential and size would…READ MORE >

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Published 22 Jul 2020

Farewell to the Zetasizer Nano – with 64k+ citations

The Zetasizer Nano in review… When we introduced the Zetasizer Nano at www.zetasizer.com in 2003 it was ground-breaking. There were several reasons for it. For instance, a step-change development that created an entirely new generation of lab equipment. At the…READ MORE >

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Published 3 Jul 2020

Moving a Zetasizer to a different lab

You have been using your Zetasizer for a while. Due to the current physical distancing situation you would like to move your Zetasizer to a different lab. Is it possible to just relocate a system to another building? What precautions…READ MORE >

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Published 3 Jun 2020

Cleaning protocol for a Zetasizer dip cell

Every once in a while we receive a Zetasizer question that we have heard before. Here is an example of such for the dip cell: “How do I clean the Zetasizer dip cell? What is a good cleaning protocol?” Most…READ MORE >

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Published 21 Jan 2020

Protein charge determination – How to?

One of the advanced features in the Zetasizer Nano software is protein charge determination. In order to take advantage of the calculator, both size Dynamic Light Scattering (DLS) and electrophoretic mobility (zeta, ELS) data combine. In this post, we show…READ MORE >

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Published 14 Jan 2020

Pittcon 2020 – Short courses on sizing and separations – in Chicago

This year’s Pittsburgh Conference (or Pittcon for short) is taking place in Chicago, from March 1 – March 5, 2020. I noticed the earlier early bird time frame for Pittcon short courses. As in previous years, there is a large…READ MORE >

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Published 11 Sep 2019

Frequently asked questions about the ZS Xplorer software

Getting the most out of the ZS Xplorer software! The latest system generation, the Zetasizer Ultra, and Zetasizer Pro, comes with an entirely new software platform: ZS Xplorer. With a more sample-centric workflow, you will find many routine operations quite…READ MORE >

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