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00:00:00 DLS, PCS, QELS, NIBS, MADLS, ELS - Oh my!
00:02:07 Acronyms
00:04:29 The Zetasizer ZS, Pro and Ultra
00:06:48 Brownian Motion and Particle Size
00:06:48 Dynamic Light Scattering(Particle Size)
00:07:26 Introduction to Dynamic Light Scattering (DLS)
00:09:40 The Correlation Function
00:12:40 Large Z-Average Values
00:16:26 Zetasizer Nano, Pro & UltraBackscatter Optics
00:17:51 NIBS: Non Invasive Back ScatterVariable Measurement Positioning
00:20:09 Application Example: Sucrose = sub-nm
00:20:52 Zetasizer Pro & Ultra
00:21:27 DLS data quality
00:22:00 Limitations – Experimental Noise
00:23:59 Adaptive Correlation: A New Approach to Data Acquisition
00:25:44 Zetasizer Ultra
00:27:07 Pushing the DLS resolution: Multi Angle DLS (MADLS)
00:27:49 Pushing the DLS resolution: Multi Angle DLS (MADLS)
00:28:27 Example of increased resolution for MADLS
00:29:18 MADLS®
00:29:24 MADLS®
00:30:31 Zetasizer Ultra
00:31:00 Particle Concentration
00:31:11 Particle Concentration
00:32:17 What do I need for a concentration measurement?
00:32:58 Sample requirements for reliable concentration measurements
00:35:13 Summary; benefits of DLS
00:37:43 ELS – Electrophoretic Light Scattering
00:38:36 What is Zeta Potential?
00:39:48 Zeta Potential
00:43:19 Electrophoretic Light Scattering
00:44:10 Zeta Potential
00:44:31 Electrophoretic Light Scattering(Zeta Potential)
00:45:25 Optical Configuration
00:46:01 Example Measurement Cells Capillary & Dip Cells
00:46:53 Diffusion Barrier Technique*
00:48:37 Formulated Products - Applications
00:50:14 Multicomponent Products & Film Formation
00:50:41 Surface Activity of Surfactant
00:51:18 Coating Defects
00:51:41 Coating Efficiency
00:52:00 Summary; Zeta Potential
00:52:50 Acronyms
00:54:19 Added Features & Benefits of the Zetasizer Pro & Ultra
00:55:12 Thank You for Your Attention
00:55:37 Question & Answers
01:03:28 Contact information

The basics of Dynamic Light Scattering and electrophoretic light scattering will be discussed. I will review the Dynamic Light Scattering acronyms, i.e what is meant by NIBS and MADLS. I will introduce the utility of light scattering measurements, provide useful tips for analyzing DLS measurement results and provide interesting example data.

I will also review Electrophoretic Light Scattering and zeta potential. Zeta potential is a function of both the particle surface and the dispersant and is therefore an important predictor of the inter-facial behavior of a multi-component formulated product.

If you have an interest in the sizing of nano-materials, improving size results, identifying good and bad data. Join me in this introductory lecture on how sizing and zeta potential provide key results in a broad range of application problems.


Ana Morfesis Ph.D.


  • Who should attend?

- Anyone interested to learn about the basics of Dynamic light scattering and useful tips for analyzing DLS measurement results

  • Why should you attend?

- To educate yourself on new approaches and refresh yourself on the basics of dynamic light scattering from an expert on the subject