Nanoparticle dynamic light scattering

Fig. 4 PIC dye nanoparticles prepared by the ion-association method. (1) Particle size distributions (determined by the dynamic light scattering technique) and the corresponding electron micrographs of the dye nanoparticles. The average diameter can be controlled by tuning the molar ratio of TPB- to PIC+ (=[TPB-]/[PIC+]. With an increase in the molar ratio, the average diameter decreased. (2) Absorption spectra of PIC nanoparticles in aqueous solution with different sizes (125 and 64 nm in diameter), exhibiting size-dependent peak shift of the 0-0 band. The spectrum of the aqueous PIC-Br monomer solution is also shown...

Bootz, A., et al. (2004), Comparison of scanning electron microscopy, dynamic light scattering and analytical ultracentrifugation for the sizing of poly(butyl cyanoacrylate) nanoparticles, Eur. J. Pharm. Biopharm., 57(2), 369-375. 

Liu, X., Dai, Q., Austin, L., Courts, J., Knowles, G., Zou, J. H., Chen, H., and Huo, Q. (2008). A one-step homogeneous immunoassay for cancer biomarker detection using gold nanoparticle probes coupled with dynamic light scattering. J Am. Chem. Soc. 130 2780-2782. 

Shukla, A. Kiselev, M.A. Hoell, A. Neubert, R.H.H. Characterization of nanoparticles of lidocaine in w/o microemulsions using small-angle neutron scattering and dynamic light scattering. Pramana-Journal of Physics... 

Freud, P.J. Plantz, P.E. Sizing nanoparticles with dynamic light scattering. Powder and Bulk Eng. 2004, 1-5. 

Molybdenum sulfide nanoparticles in the size-range 3-10 nm have been synthesized in mild conditions using a microemulsion-based route. The reverse microemulsion phase, AOT/ n-heptane/ water, was first characterized by Transmission Electron Microscopy (TEM) of Freeze Fractures (FF) obtained via High Pressure Freezing (HPF) as well as Dynamic Light Scattering (DLS). The impacts of various parameters such as water-to-surfactant molar ratio w and the addition of a nonionic cosurfactant were then studied. The reverse microemulsion phase was further used to tailor the size of MoSx nanoparticles. The mean particle size obtained by this method makes those particles particularly interesting for further catalytic applications. 

Figure 3.2.6). Narrowly dispersed polystyrene (synthesized by atom transfer radical polymerization [polydispersity < 1.1]) was end fnnctionized with a phosphonate moiety that binds strongly to titanium oxide. The combination of narrowly dispersed titanium oxide and narrowly dispersed phosponate-terminated polystyrene generates a narrowly dispersed core-shell architecture as measured by dynamic light scattering, which can be spun into dielectric films. The covalent coating of polystyrene around titanium oxide is helpful at preventing aggregation of the nanoparticles in organic dispersion and in thin films.

FIGURE 26.6 Nanoparticle morphology. Malvern 4700 dynamic light-scattering apparatus average particle size analyzed by SEM and light scattering. 

DLS (dynamic light scattering)—in dynamic light scattering laser light is scattered by the nanoparticles. Due to the Brownian motion of the particles, a time-dependent fluctuation is imparted to the scattered light intensity. Analysis of the signal intensity yields information about the diffusional motion of the particles, which is in turn related to the hydrodynamic size via the Stoke-Einstein equation. 

FIGURE 20.27 (a) Dynamic light scattering analysis of the size distribution of chitosan nanoparticles (CSNPs) by using (A) a PCTE... 

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