NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Miniaturized Dynamic Light Scattering Instrumentation for Use in Microfluidic Applications

Published

Author(s)

Thomas Q. Chastek, Kathryn L. Beers, Eric J. Amis

Abstract

Five designs for a miniaturized dynamic light scattering (DLS) instrument with microfluidic flow and fiber optic probes directly embedded into the sample are described. These instruments accurately determine the size of 10 nm to 100 nm particles dispersed in organic and aqueous solvents with most sample sizes less than 150 L. Small stir bars were incorporated directly into the instruments, and enabled blending of two different solutions immediately prior to DLS measurements. Demonstration of the instruments capabilities include high throughput measurements of the micelle to unimer transition for poly(styrene-b-isoprene) in mixed toluene/hexadecane solvent, obtained by systematically blending toluene-rich and hexadecane-rich polymer solutions. The critical solvent composition was quickly identified with less than 20 mg of polymer. Further capabilities include temperature control, demonstrated by identification of a critical micelle temperature of poly(ethylene oxide-b-propylene oxide-b-ethylene oxide), as well as multiangle DLS measurements.
Citation
Review of Science Instruments
Volume
78
Pub Type
Journals

Download Paper

Local Download

Keywords

dynamic light scattering, fiber optic, high throughput, microfluidics
Biomaterials, Chemical engineering and processing and Polymers

Citation

Chastek, T. , Beers, K. and Amis, E. (2007), Miniaturized Dynamic Light Scattering Instrumentation for Use in Microfluidic Applications, Review of Science Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852696 (Accessed October 10, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created January 1, 2007, Updated February 19, 2017
Was this page helpful?