Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physics
Interactions Of Carbon Nanotubes With Human Lung Epithelial Cells In Vitro, Assessed By Raman Spectroscopy, Peter Knief
Interactions Of Carbon Nanotubes With Human Lung Epithelial Cells In Vitro, Assessed By Raman Spectroscopy, Peter Knief
Doctoral
Current methods for the evaluation of cellular interactions with nanoparticles are non-specific, relatively slow and invasive to the cell. Raman spectroscopy is a non invasive technique whose potential in the biosciences has already been demonstrated and has been used in the investigation of cell interactions with various external agents. The main focus of this study is to employ Raman spectroscopy to investigate the interaction of A549 human lung cells with single walled carbon nanotubes. · Carbon nanotubes have attracted considerable interest not only for their outstanding physical and electronic properties, promising a potentially vast number of applications, but also for …
Diode Properties Of Nanotube Networks, David D. Allred, Bryan Hicks, Stephanie Getty
Diode Properties Of Nanotube Networks, David D. Allred, Bryan Hicks, Stephanie Getty
Faculty Publications
Single-walled carbon nanotubes (SWCNT) were prepared using iron catalysts deposited by indirect evaporation on silicon substrate covered with 500 nm-thick thermal oxide. Diode SWCNT devices have been fabricated using Au and Al, as the asymmetric metal contacts, and a random network of metallic and semiconducting nanotubes as the device channel. No effort was made to align the SWCNTs or to eliminate metallic nanotubes in our devices. Asymmetric voltage-current behavior was seen. Current rectification was observed in the source-drain bias range of -3 V to +3 V. Rectification was somewhat surprising since, although metallic tubes are in the minority (~ 1/3), …
Van Der Waals-London Dispersion Interaction Framework For Experimentally Realistic Carbon Nanotube Systems, Roger H. French
Van Der Waals-London Dispersion Interaction Framework For Experimentally Realistic Carbon Nanotube Systems, Roger H. French
Faculty Scholarship
A system's van der Waals–London dispersion interactions are often ignored, poorly understood, or crudely approximated, despite their importance in determining the intrinsic properties and intermolecular forces present in a given system. There are several key barriers that contribute to this issue: 1) lack of the required full spectral optical properties, 2) lack of the proper geometrical formulation to give meaningful results, and 3) a perception that a full van der Waals–London dispersion calculation is somehow unwieldy or difficult to understand conceptually. However, the physical origin of the fundamental interactions for carbon nanotube systems can now be readily understood due to …