objective(s): chitosan nanoparticles (cnps) were prepared based on the ionic gelation of chitoan with anionic compounds of ocimum basilicum leaf extract. materials and methods: after addition of ocimum basilicum leaf extract to chitosan solution, the physicochemical properties of the nanoparticles were determined by field emission scanning electron microscope (fesem), fourier transform infrared...

biological systems provide many examples of specifically tailored, nanostructured molecules with highly optimized properties and characteristics. these biomaterials are composite materials and consist of an inorganic component and a special organic matrix. crystalline bacterial cell surface layers (s-layers( are the outermost cell envelope component of many eubacteria and archaea and are compos...

polybutadiene nanoparticles were synthesized via batch emulsion polymerization of butadiene in the presence of potassium persulfate, disproportionate rosinate potassium cation and t-dodecyl mercaptane as initiator, emulsifier and chain transfer agent, respectively. polymerization reaction was performed at different temperatures (60, 70 and 80 °c). conversion was measured at the various time int...

the aim of the present work was to prepare and characterize biopolymer nanocarriers and evaluate their suitability in possible oral delivery of insulin. the egg albumin biopolymer was used to prepare nanoparticles which were further characterized by fourier transformed infrared spectroscopy (ftir), transmission electron microscopy (tem), scanning electron microscopy (sem), zeta potential, dynam...

Changes in the size of the aptamer-conjugated AuNPs upon binding to the viruses were observed by dynamic light scattering (DLS). Changes in the size of scattering particles using DLS when the AuNP.virus complexes are formed has previously been reported by Driskell et al. using antibodies conjugated to 30, 60, 80nm AuNPs.[1] For a direct comparison with their work we used AuNPs of similar diamet...

Bio-directed synthesis of nanoparticles is an interesting field of rapid advancement for biologists,chemists and materials scientists, especially in light of efforts to find out green methods of inorganicmaterial synthesis. In the present study, green synthesis of platinum nanoparticles (PtNPs) using sheepmilk is reported for the first time. By adjusti...

In this paper, we introduce an innovative device for nanoparticle sizes measurement in dark and concentrated media based on dynamic light scattering (DLS). Conventional DLS is a powerful technique to characterize dilute and transparent dispersions of nanoparticles. However, it becomes ineffective in dark media, since the laser beam is absorbed by sample and can induce an interfering effect. In ...

In this work, the particle size distribution measured using the dynamic light scattering (DLS) technique is compared with that obtained from the static light scattering (SLS) technique or provided by the supplier measured using the Transmission Electron Microscopy (TEM) technique for dilute Poly(N-isopropylacrylamide) microgel and standard polystyrene latex samples in dispersion respectively. T...

NanoSight is a company that develops, manufactures and supplies nanoparticle characterization instrumentation. The sizing and counting of nanoparticles in liquids is vital in many areas. NanoSight enables the user of its systems to directly visualize nanoparticles particle by particle to derive individual numbers rather than producing the average numbers as may be seen by other techniques, e.g....

The precision and accuracy of measurements of the diameter and electrophoretic mobility (mu) of polymeric nanoparticles is compared using four different analytical approaches: carbon-nanotube-based Coulter counting, dynamic light scattering (DLS), transmission electron microscopy (TEM), and phase analysis light scattering (PALS). Carbon-nanotube-based Coulter counters (CNCCs) use a 132 nm diame...