Personal & Home Care, Food & Agriculture – Page 21

The effect of polymerization rate on the formation of polyaniline nanofibers

Huang Y-F, Lin C-W, National Yunlin University of Science and Technology, TW

This study reports the synthesis of polyaniline (PANI) nanofibers with an average diameter of 30~50 nm using HCl as a dopant. Experiments controlled the polymerization rate in terms of temperature and oxidant concentration. Transmission electron [...]

Multifunctional magnetic hydrogels with polyethylene glycol-derivative colloidal nanospheres for drug delivery and hyperthermia applications

Ghosh S., GhoshMitra S., Cai T., GhoshMitra S., Neogi A., Hu Z., Mills N., Southeast Missouri State University, US

Magnetically responsive thermo-active hydrogels offer several potential advantages over other bio-material systems for the controlled release of drugs and targeted thermal therapy of the cancerous cells. Thermal and magnetic responses of hydrogels can be tuned [...]

Characterization of Cellulose Nanocrystals by SPM

Lahiji R.R., Reifenberger R., Moon R.J., Rudie A., Purdue University, US

Cellulose is the world’s most abundant biopolymer and is present in virtually all plants. Its main function is to act as a reinforcement material. Cellulose is a linear chain of ringed glucose monomers ((C6H10O5)n; n=10 [...]

Atomic Force/Scanning Probe Microscopy of Pharmaceutical and Biological Materials

Chernoff D.A., Advanced Surface Microscopy, Inc., US

AFM is a valuable tool for a wide range of materials and device analysis. AFM images of particles and biopolymers are valued because direct visualization and measurement of individual objects complements the average measures obtained [...]

Characterizing Membrane Sorption and Diffusion with Flux Lateral Force Microscopy

Killgore J.P., Overney R.M., University of Washington, US

Bulk permeability measurements provide an incomplete descriptor of permeability when considering heterogeneous or anisotropic membranes. Localized measurements of flux allow for independent assessment of constituent contributions to total permeability. Analogous to a puck on an [...]

Scalability and Control of Electrophoretic Directed Assembly of Nanoparticles

Yilmaz C., Cha N-G, Somu S., Busnaina A., Northeastern University, US

The nanoscale directed assembly of nanoparticles has a many applications in biotechnology, energy, electronics and nanomaterials. Directed assembly of nanoparticles for biosensor devices, nanowire and interconnects are being conducted at the CHN. The nanoparticle based [...]

Controlled Co-Assembly of Iron Oxide Nanoparticles and Polymers: Towards the Generation of Highly Persistent Superparamagnetic Nanorods

Fresnais J., Berret J.-F., Frka-Petesic B., Sandre O., Perzynski R., Laboratoire Matière et Systèmes Complexes, FR

In this presentation, we give an account of the formation of colloidal and supracolloidal aggregates obtained by controlled co-assembly of 7 nm particles with copolymers.

Redispersible hybrid nanopowders: cerium oxide nanoparticle complexes with phosphonated-peg oligomers

Qi L., Sehgal A., Castaing J.-C., Fresnais J., Berret J.-F., Chapel J.-P., Rhodia/CNRS joint Institution, US

Rare earth cerium oxide (ceria) nanoparticles are stabilized using end-functional phosphonated-PEG oligomers. The complexation process and structure of the resulting hybrid core-shell singlet nanocolloids are described, characterized and modeled using light and neutron scattering data. [...]

Influence of structural forces and contact hysteresis on flow-induced aggregation and breakage of polymer nanoparticles

Moussa A.S., Ehrl L., Soos M., Lattuada M., Morbidelli M., ETH Zürich, CH

Static light scattering was used on-line to monitor the flow-induced aggregation of surfactant-free polystyrene latexes in a stirred tank. Various latexes with primary particles diameters ranging between 100 and 300 nm, different charge groups, different [...]

The Nanomechanical Testing and Characterisation of Anti-viral Nano-structured Surface Coatings

Singh I., Allan P.S., Brunel University, UK

Surface coatings of nanoparticles that possess antiviral properties have been tested by a nano scratch method for their adhesive strength to metallic and polymeric substrates. The deformed coatings were observed in an SEM and values [...]