![]() ![]() dynamic light scattering from rigid and nearly rigid rods.dynamic light scattering from polymer gels.dynamic light scattering from polymers in solution and in bulk.dynamic light scattering from dense polymer systems.simultaneous static and dynamic light scattering - application to polymer structure analysis.application of dynamic light scattering to polyelectrolytes in solution.dynamic properties of polymer solutions.dynamic light scattering and linear viscoelasticity of polymers in solution and in the bulk.data analysis in dynamic light scattering.noise on photon correlation functions and its effects on data reduction algorithms.Dynamic scattering from multicomponent polymer mixtures in solution and in bulk.With the many inputs of the Time Tagger, you can also easily scale your DLS setup to many detection channels and integrate it into more sophisticated experiments.Bibliography Includes bibliographical references and indexes. All of this is possible without having to repeat the physical measurement. In addition, you can later change your autocorrelation parameters, investigate different time scales more closely, or compare different segments of your time trace in detail. You have access to the full measurement data, allowing easy storing and post-processing of your raw photon counts. The Time Tagger, on the other hand, offers all the benefits of a software correlator. Most commercial DLS systems calculate the correlation directly in hardware with a fixed number of channels and lag times, returning only the correlation curve. One can thus determine the particle size from an exponential fit to the autocorrelation and its decay time. Because large particles have higher friction and move more slowly in a liquid, the autocorrelation of the photon time trace decays more slowly than for small particles. The Time Tagger software calculates a fully logarithmic autocorrelation on the detected photon time trace. Detecting the speckle pattern with a single photon detector at a fixed angle and tracking the intensity of the scattered photons with the Time Tagger, one can observe a fluctuating intensity time trace corresponding to the Brownian motion of the nanoparticles. Shining coherent laser light onto the sample results in scattering by the particles, and a speckle pattern is visible. DLS measures these fluctuating motions and their characteristic time scale, which can then be related to the nanoparticle size distribution. ![]() Nanoparticles inside a solution undergo random movements, the so-called Brownian motion. DLS can measure nanoparticles as small as one nanometer and as big as a few microns. ![]() And therefore, if the tested sample is suitable or if unwanted agglomeration of the particles has occurred. One can see within seconds if the measured size of the dissolved nanoparticles is within expectations. DLS allows for fast and non-invasive verification of sample quality and ensures a stable production process. ![]() It is a well-established method in many areas that focus on nanoparticles, such as colloid and polymer science, pharma and food industries, and cosmetic and paint product development. Dynamic light scattering (DLS) is an optical analysis method for particle sizes in solutions. ![]()
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