Nanobubbles Separating fact from fiction

NanobubblesSeparating fact from fiction By Ciaran C. Murphy Head of Product Management 30/10/14

There has been increasing interesting and some sceptism in the arena of nanobubbles over the last few years and hence the title of my talk is separating fact from the fiction at least hopefully that is what we will achieve today. 1

Content What are nanobubbles Why the interest Characterisation challenges Characterisation techniques Dynamic Light Scattering (DLS)Nanoparticle Tracking Analysis (NTA) Resonant Mass Measurement (RMM)

So first up to give you a lay of the land and what we will cover in the webinar today.

We will have a quick look at what exactly a nanobubble is and then why the interest and some of the standards activity in the area.

We will look at some of the characterisation challenges associated with measuring nanobubbles and finally look at how three techniques have been applied to measuring nanobubbles based around real data sets and some of the benefits of the different techniques. 2

Large bubbles (several mm)

Courtesy: FBIA 2014

Bubbles can come in a variety of different sizes and recent work within ISO, which I will come back to later in the presentation has started to introduce some differentiation.

We might think of four different sizing categories for bubbles which go from the submicron right up to millimeter size bubbles.

At the larger scale most of us will be familiar with these bubbles as we have seen them in applications from the carbonation of Soda drinks to the aeration of fish tanks. 3

Ultra fine bubbles (