GMC

About: GMC is a based out in . It is known for research contribution in the topics: Population & Medicine. The organization has 2322 authors who have published 1351 publications receiving 9800 citations.

Estimating the effective density of engineered nanomaterials for in vitro dosimetry

Abstract: The need for accurate in vitro dosimetry remains a major obstacle to the development of cost-effective toxicological screening methods for engineered nanomaterials. An important key to accurate in vitro dosimetry is the characterization of sedimentation and diffusion rates of nanoparticles suspended in culture media, which largely depend upon the effective density and diameter of formed agglomerates in suspension. Here we present a rapid and inexpensive method for accurately measuring the effective density of nano-agglomerates in suspension. This novel method is based on the volume of the pellet obtained by benchtop centrifugation of nanomaterial suspensions in a packed cell volume tube, and is validated against gold-standard analytical ultracentrifugation data. This simple and cost-effective method allows nanotoxicologists to correctly model nanoparticle transport, and thus attain accurate dosimetry in cell culture systems, which will greatly advance the development of reliable and efficient methods for toxicological testing and investigation of nano-bio interactions in vitro.

Screen-Printable Thin Film Supercapacitor Device Utilizing Graphene/Polyaniline Inks

Abstract: including printable transistors, [ 3 ] solar cells, [ 4 ] and organic light emitting diodes [ 5 ] has the potential to meet these goals in future applications. However, a compatible energy source for these applications is still lacking. Fully printable charge storage devices show great promise for allowing the full integration into the manufacturing process of printed electronics. Conventional charge storage devices such as batteries are often limited by their bulkiness, low power density, low chargedischarge rates, and are frequently the expensive components of electronic devices. [ 6 ] Supercapacitors are unique electrochemical energy storage devices with complementary properties to Li-ion batteries, and are considered promising candidates for alternative energy storage devices as a result of their pulse power supply, long cycle life, and low maintenance cost. [ 7 , 8 ]