Hygroscopic Effects on AuCl₃-Doped Carbon Nanotubes

Abstract

Hygroscopic effects on AuCl 3 -doped single-walled carbon nanotubes (SWCNTs) were investigated. Various concentrations of AuCl 3 solution were dropped on the random network SWCNT transistors, where the doping effect was confirmed by I-V g characteristics and a blue shift in the Raman G band. The AuCl 3 -doped SWCNT transistor was highly sensitive to water vapor in the I-V g curve, especially in the positive gate bias region, compared with the undoped SWCNT transistors. We also found the selective response of water from ambient gases, such as O 2 and N 2 , in AuCl 3 -doped SWCNTs. This investigation could be beneficial for high-performance water sensor applications.

Enhanced solar energy conversion in Au-doped, single-wall carbon nanotube-Si heterojunction cells

“…In Figure 4, the G bands were up-shift after doping. These changes were consistent with the previous report of the phonon stiffening effect by p-type doping [27,28]. The decreased intensities of the G′ bands manifested the reduction of metallicity of SCNT [29].…”

Strategy for Carrier Control in Carbon Nanotube Transistors

“…[70] Here, the threshold voltage is downshifted with an increase of electron carriers. As the AuCl 3 concentration is increased, on the other hand, an upshift of the threshold voltage causes the offcurrent to increase more prominently than the on-current, as shown in Figure 11 c. [71] The high off-current is attributed to a strong covalent bonding of the Au atom to the CNT surface. [91] A drawback of chemical doping is the return of an n-type to a p-type transistor on exposure to air, as the dopants are easily oxidized and thus lose their ability for n-type doping.…”

Advances in tailoring the electronic properties of single-walled carbon nanotubes

“…At the same time, acceptor doping of nanotubes can be realized via the intercalation of bromine, iodine, iron trichloride, nitric acid, sulfuric acid, hydrochloric acid and gold trichloride molecules [28,163,177,182,188,193,199,[208][209][210][211][212][213][214][215][216][217][218][219].…”