Noncovalent titania wrapping of single-walled carbon nanotubes for environmentally stable transparent conductive thin films

Abstract

We present a simple process for the fabrication of high performance transparent conducting films that contain single-walled carbon nanotubes (SWCNTs) noncovalently coated with an ultrathin titania layer. The hydrophobic interactions between nanotube surfaces and the acetylacetone (acac) ligands used to stabilize the TiO 2 precursor provide an interesting alternative method for noncovalently coating the SWCNTs with a titania layer. The ultrathin titania layer on SWCNTs prevented the oxidation of functionalized SWCNTs at high temperatures, and protected against water molecule absorption. Moreover, the uniform and thin titania layer, formed via hydrophobic interactions, promoted the selective removal of amorphous carbonaceous materials upon heating to 300 C as well as withdrawing electrons from the nanotubes. The noncovalent titania coating of the SWCNTs may potentially exhibit other interesting physical properties relevant to applications such as transparent conducting films, photo-catalysis, and sensor electrodes.

Arrays of vertically aligned tubular-structured graphene for flexible field emitters

“…5a. Compared with other protective materials such as SiO 2 , MgO, and TiO 2 , 29,48,49 the ZnO is one of n-type semiconductors with a wide band gap and is conductive with low resistivity in the order of 10 À2 to 10 À3 U cm. 32,50,51 The formation of the ZnO protective layer was facilitated by hydrogen bonding between the amine groups of ZnO sol and carboxyl groups of RGO, and followed by a thermal treatment.…”

Fabrication of durable and flexible single-walled carbon nanotube transparent conductive films

“…[1][2][3][4][5][6][7][8][9][10][11] In particular, singlewalled carbon nanotubes (SWCNTs), which have remarkable electrical mobility, conductivity 6,12 and work functions, 13 are deliberated favorable in electrical applications such as transistors, 6,14,15 sensors, 16,17 memory devices 18 and conducting lms. [4][5][6][7][19][20][21] Thus, SWCNTs are expected as the best candidate material to replace current ITO due to outstanding exibility, good stability, high conductivity and good optical transparency, ability of low-temperature printing and coating process; and thanks to its abundant availability which has great potential for the cost reduction.…”

Transparent conductive carbon nanotube/binder hybrid thin films

“…The D-band in the Raman spectra of functionalized SWCNT samples usually contains a broad peak upon which show the chemical environment of the nanotube surface without acetylacetone. (Han et al, 2010) is superimposed a sharper peak. The broad feature arises from amorphous carbon, and the sharper feature arises from carbon nanotubes.…”