Wolfgang Laemmle's Blog (8)

An impressive and coherent course on risk evaluation

Just today Tony Harrison on LinkedIn pointed to a very helpfull risk evaluation course given by Peter Sandman that can directly also be applied for nano particle risk evaluation. It can be found easily via my personal SICO blog. Or as an excerpt also on YOUTUBE directly.

Added by Wolfgang Laemmle on April 28, 2012 at 10:52am — No Comments

Recent and upcoming NANO events

I have just issued a list of recent and upcoming NANO events on SICO's NEWS blog and I hope that this survay can help a little to keep trac of what is going on. 

Added by Wolfgang Laemmle on January 20, 2012 at 11:13am — 1 Comment

Measuring means comparing

An attempt to screen the actual available particle sizing methods and instruments.

Details you will find in my latest blog:

please click here for the full report

Added by Wolfgang Laemmle on December 15, 2011 at 12:15am — No Comments

Size- & Zeta-potential-measurement, you only get what you pay for!

You only get what you pay for!  Are low budget instruments worth what you pay for it?

“Nano” is one of the most attractive and modern terms in research, industry and marketing.

Due to the excellent definition work of the ISO committee TC229 since August 2008 there is a precise determination what “Nano” really means (ISO/TS27687). Also development in this field, as well as increasing knowledge is growing daily at an accelerating speed.

Only the size measurement…


Added by Wolfgang Laemmle on April 29, 2011 at 4:09pm — No Comments

Sample preparation of nano material for size determination

According to the valid definitions in ISO/TS 27687: August 2008 and the standardl particle definitions in accordance with  ISO TC 24/SC 4,  TC 146 and TC 209 there is a clear definition of nano particles respectively nano objects. Only for these nano objects, where one, two or three external dimensions are in the nanometer range below 100nm, the term nano particles should be used.

All coarser particles are submicron particles and should not be called nano particles…


Added by Wolfgang Laemmle on January 24, 2011 at 6:00pm — 5 Comments

The use of Zeta-potential in Nano analytics

In relation with production and stabilization of  Nano-objects there is very often the talk about observing/ setting the right Zeta-potential. Also a lot of actual analytical instruments  promote Zeta-potential determination together with e.g. size determination.

But let us have a closer look to the use of Zeta-potential today and its value.


In research of specific structure analysis Zeta-potential measurement is irreplaceable for:

  • Finding reasons for…

Added by Wolfgang Laemmle on January 24, 2011 at 4:30pm — No Comments


In my recent blog on this theme I stated:

These early instruments needed a very robust and simple calculation mode, the ‘2nd Cumulant’ method, for evaluation because the calculation power of the then available computers were still very limited. Still today this simplified calculation method is positioned in the related ISO 13321 framework. It generates as results a mean particle diameter and a value for the width of an assumed Gaussian distribution…


Added by Wolfgang Laemmle on January 17, 2011 at 6:00pm — No Comments



NANO is an in many cases even in technical literature incorrectly used term. The Technical Committee 229 of ISO is deserving thanks for an exact definition with respect to particle size measurement in August 2008. (ISO/TS27687).

According to this definition only NANO-objects should be called NANO-particles if its three coordinate dimensions are all within the NANO-range of about 1 nm to 100 nm.

Regrettably even today many… Continue

Added by Wolfgang Laemmle on January 6, 2011 at 10:43am — No Comments

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

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