The LRSM installed a new Multi-angle Light Scattering Instrument – an LS Spectrometer, from LS instruments in the Spring of 2023. This instrument enables a broad range of materials characterization through static and dynamic light scattering. Capabilities enabled by the SLS/DLS instrument include particle size determination, studies of relaxation dynamics, and investigation of thermodynamic interactions of species in suspension (e.g., nanoparticles; polymers; colloidal species).
The instrument is equipped with a 3D Cross-correlation capability that enables it to distinguish intensity decorrelation that originates from single vs multiple scattering events. As a result, the instrument can be used to collect dynamic light scattering data from samples that exhibit multiple scattering, i.e. concentrated, opaque systems. The Modulated 3D Cross-Correlation option enhances the signal from the cross-correlation measurement. Additional options include sample rotation (for measurements of non-ergodic systems), and temperature resolved measurements.
Standard measurements:
Specifications:
Sample volume
50 μL to 4 ml
Particle size range (Rh)
0.15 nm to 5 μm
Radius of gyration (Rg)
5 nm to 5 μm
Molecular weight
360 – 3,600,000 Dalton
Angular range
12° to 150° (+/- 0.01°) Recommended 15° to 150°
Laser
Fiber-coupled laser 120 mW, 638 nm
Correlator
320 channels, delay time 12.5 ns to 15 h, auto- and cross-correlation
Temperature
up to 90 °C
For light scattering tutorials:
No instruments are listed in this facility
MRFN.org is supported by the MRSEC Program of the National Science Foundation. Image in the header is courtesy of CRISP MRSEC.
