Multiangle static and dynamic light scattering in the intermediate scattering angle range

TL;DR

This paper introduces a novel light scattering instrument capable of measuring static and dynamic scattering at intermediate angles (0.5° to 25°), filling a gap between existing wide and small angle techniques.

Contribution

The authors present a new optical setup using standard components and a CCD detector to perform simultaneous static and dynamic light scattering in the intermediate angle range.

Findings

Successfully measured scattering profiles of various samples.

Demonstrated Brownian dynamics in dilute colloids.

Operates effectively within the intermediate angle regime.

Abstract

We describe a light scattering apparatus based on a novel optical scheme covering the scattering angle range $0.5\dg \le \theta \le 25\dg$, an intermediate regime at the frontier between wide angle and small angle setups that is difficult to access by existing instruments. Our apparatus uses standard, readily available optomechanical components. Thanks to the use of a charge-coupled device detector, both static and dynamic light scattering can be performed simultaneously at several scattering angles. We demonstrate the capabilities of our apparatus by measuring the scattering profile of a variety of samples and the Brownian dynamics of a dilute colloidal suspension.