Application Notes: DLS & SLS

 
 


LS Spectrometer

  •  Exploring sample turbidity limits
    Dynamic light scattering (DLS) is a widely used technique for the determination of solution-based particle and polymer size distributions.  In particular, it has become an industry standard for sizing nanoparticles in the range of several nanometers to several microns.  The wide acceptance of DLS for particle sizing stems from the simple, fast and non-contact measurement procedure for generating particle size distributions. In this application note we explore the influence of sample turbidity and sample optical path lengths on DLS measurement quality.
    Download: Application Note Sample Turbidity Limits

 

  • Characterizing concentrated colloidal suspensions by static light scattering (SLS)
    Static Light Scattering (SLS) is a technique in which laser light scattered from a sample is measured as a function of scattering angle. The angular response is in general complex and is a function of dipole emission profiles and of the interference of light scattered from refractive index boundaries of the particles. These contributions to the overall angular-dependent scattering profile provide a wealth of information on particle size and shape, as well as structure and interactions in the sample. In this application note we focus on measuring the particle form factor of a concentrated colloidal suspension from which we extract the size (radius of gyration, Rg) and size distribution (polydispersity).
    Download: Application Note Concentrated Colloidal Suspensions SLS   

  • Particle sizing by 3D cross-correlation DLS in highly scattering samples
    Dynamic Light Scattering (DLS) has become a reference technique for particle sizing applications in the range of several nanometers to several microns. Conventional DLS however, is limited to transparent samples that feature single scattering only, because multiple scattering will result in analysis errors of the DLS signal.  The 3D cross-correlation technology is an efficient technique to suppress multiple scattering and thus allow application of DLS to a much wider range of samples.
    Download: Application Note 3D DLS

  • Dilute and concentrated microgel suspensions studied by 3D cross-correlation DLS
    Microgels are soft particles that are able to deform and shrink at either high packings or under external flows or shear. Here we use auto- and cross-correlation Dynamic Light Scattering to study the dynamics of dilute and concentrated microgel suspensions.
    Download: Application Note Microgels

  • Characterization of dilute and concentrated
    Poly-(N-isopropyl-acrylamide)-N, N-methylenbisacrylamide (PNiPAM-BiS) microgels
    We have employed a 3D Dynamic Light Scattering (DLS) instrument to study both dilute and concentrated, aqueous suspensions of Poly-(N-isopropyl-acrylamide) (PNIPAM) microgel particles cross-linked with N,N-methylenbisacrylamide (BiS) to  reveal the thermal response of these microgel particles.
    Download:   Application Note PNiPAM