The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Microwave to THz characterizations of standalone MWNT paper and SWNT and few-layer-graphene thin films on glass substrates are presented. The MWNT paper is treated as an effective medium and its complex permittivity and permeability are extracted from both transmission and reflection measurements done in microwave and THz regimes. The results from these two different frequency ranges agree well. Due...
We demonstrate enhanced terahertz wave transmission through carbon nanotube films with subwavelength apertures. The peak frequency of the transmitted waves matches well with the shape resonance, mainly determined by the length of the apertures and the refractive index of surrounding media.
Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes have been measured from THz to UV region. The broad absorption band around 100-1000 cm-1 of the metallic sample can correspond to the optical transition between small energy gap in “metallic” nanotubes.
We performed time-domain terahertz (THz) spectroscopy on single-walled carbon nanotube films. We found that a filtration method provides an efficient way of fabricating thick nanotube films which is capable of effective shielding of THz waves. Shielding effectiveness of more than 40 has been achieved from our method. In addition, all of the films we fabricated demonstrate a good metallic behavior...
Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes separated by density-gradient ultracentrifugation method have been measured using THz time-domain spectroscopy. Absorbance in metallic nanotubes increase with increasing frequency up to 6 THz. This result suggests that the dielectronic properties even for high purity metallic nanotube samples can not be explained...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.