Langmuir hydrogen dissociation approach in radiolabeling carbon nanotubes and graphene oxide

Abstract

Carbon-based nanomaterials have piqued the interest of several researchers. At the same time, radioactive labeling is a powerful tool for studying processes in different systems, including biological and organic; however, the introduction of radioactive isotopes into carbon-based nanomaterial remains a great challenge. We have used the Langmuir hydrogen dissociation method to introduce tritium in single-walled carbon nanotubes and graphene oxide. The technique allows us to achieve a specific radioactivity of 107 and 27 Ci/g for single-layer graphene oxide and single-walled carbon nanotubes, respectively. Based on the analysis of characteristic Raman modes at 1350 and 1580 cm −1 , a minimal amount of structural changes to the nanomaterials due to radiolabeling was observed. The availability of a simple, nondestructive, and economic technique for the introduction of radiolabels to singlewalled carbon nanotubes and graphene oxide will ultimately expand the applicability of these materials.

Development of technology for the production of thermally conductive carbon foams using microspheres and pitches

“…At the same time it is possible to regulate the total porosity, specific surface area and pore-size distribution in rather a wide range. Parameters of the porous structure have a great influence on physical-mechanical, thermal-physical and other properties of carbon foams [10][11][12][13][14][15].…”

In vivo noninvasive analysis of graphene nanomaterial pharmacokinetics using photoacoustic flow cytometry

“…Raman spectroscopy has been proposed for spectral identification and the mapping of GBNs in cells (Majeed et al ., ) in vitro . In vivo GBNs were analyzed using particles radiolabeled with 14C (Mao et al ., ) or 125I (Yang et al ., ; Badun et al ., ), as well as nanomaterials decorated with fluorescent tags (Yang et al ., ; Wang, 2016). In most cases, radio‐labeling and graphene decorating with tags either requires synthesis of completely new material and cannot be applied toward existing products, or decoration may change the chemistry of GBNs as chemical modification is needed to attach tags to the particle surface.…”