Layer-by-layer assembly yields thin graphene films with near theoretical conductivity.

Thin films fabricated from solution-processed graphene nanosheets are of considerable technological interest for a wide variety of applications, such as transparent conductors, supercapacitors, and memristors. However, very thin printed films tend to have low conductivity compared to thicker ones. In this work, we demonstrate a simple layer-by-layer deposition method which yields thin films of highly-aligned, electrochemically-exfoliated graphene which have low roughness and nanometer-scale thickness control.

Using Electrical Impedance Spectroscopy to Separately Quantify the Effect of Strain on Nanosheet and Junction Resistance in Printed Nanosheet Networks.

Many printed electronic applications require strain-independent electrical properties to ensure deformation-independent performance. Thus, developing printed, flexible devices using 2D and other nanomaterials will require an understanding of the effect of strain on the electrical properties of nano-networks. Here, novel AC electrical techniques are introduced to fully characterize the effect of strain on the resistance of high-mobility printed networks, fabricated from of electrochemically exfoliated MoS nanosheets.

Policy Surveillance Methods Applied to NORM and TENORM Regulation in the Southeast United States.

The regulation of naturally occurring radioactive materials (NORM) and technologically enhanced naturally occurring radioactive material (TENORM) at the state level in the United States of America varies significantly from state to state. Policy surveillance methods and associated technologies have been developed to monitor and evaluate the effectiveness of public health policies. Previous research has demonstrated that policy surveillance methods can be applied to state radiation regulations; however, no organization has taken steps to incorporate these results into a permanent database with a continuous data lifecycle program.

TENORM Regulation in the United States of America post-West Virginia vs. EPA.

The regulation of technologically enhanced naturally occurring radioactive materials (TENORM) in the United States of America consists of fragmentary rules split between the federal and state governments. The US Environmental Protection Agency (EPA) has recognized the complex nature of TENORM regulation but has not issued explicit TENORM rules at the federal level. Some states have enacted their own TENORM statutes and regulations to fill this gap, while others claim the authority to regulate TENORM under their general radiation protection regulations.