Abstract: Polymer composites containing carbon nanotubes often exhibit high glass transition temperatures, which can complicate their use in additive manufacturing processes. Extruded filaments containing carbon nanotubes and residual solvent can have desirably lowered glass transition temperatures. Extruded filaments can contain a polymer as a continuous phase, a nanomaterial such as carbon nanotubes homogeneously mixed throughout the continuous phase, and above 0% to about 15% solvent by weight.

Abstract: Carbon nanomaterials can undergo selective functionalization or defunctionalization in the presence of near-infrared electromagnetic radiation. In particular, semiconducting carbon nanotubes can be selectively functionalized or defunctionalized over metallic carbon nanotubes, which can allow their purification and/or separation to take place. Functionalizing methods can include exposing a carbon nanomaterial to electromagnetic radiation having a wavelength of about 700 nm or greater, and reacting at least a portion of the carbon nanomaterial with a reactive medium in the presence of the electromagnetic radiation to form a functionalized carbon nanomaterial. In the absence of the electromagnetic radiation, the carbon nanomaterial is unreactive with the reactive medium. Defunctionalizing methods can take place similarly in the absence of the reactive medium.

Abstract: Polymer composites containing carbon nanotubes often exhibit high glass transition temperatures, which can complicate their use in additive manufacturing processes. Extruded filaments containing carbon nanotubes and residual solvent can have desirably lowered glass transition temperatures. Extruded filaments can contain a polymer as a continuous phase, a nanomaterial such as carbon nanotubes homogeneously mixed throughout the continuous phase, and above 0% to about 15% solvent by weight.

Abstract: Devices used in conjunction with detecting analytes and methods of their manufacture are disclosed. A pre-concentrator device includes a thermoelectric material and an aerogel which includes a nanostructured material disposed on, and in thermal communication with, the thermoelectric material. Such a pre-concentrator is part of a detection system including a sensor. The detection system is used in a method for detecting analytes.