Papers – Page 88 – TechConnect Briefs

Defect reduction of Multiwalled Carbon Nanotubes by Rapid Vacuum Arc Annealing

Tsai J.T.H., Li J.S., Tseng A.A., Tatung University, TW

A rapid thermal annealing process is demonstrated for defect reduction of multiwalled carbon nanotubes (MWCNTs) using a DC vacuum arc discharge system. The MWCNTs grown by chemical vapor deposition at a relatively low temperature (~650 [...]

Formation of Single Walled Carbon Nanotubes Via the Interaction of Graphene Nanoribbons: ab initio Density Functional Calculations

Du A.J., Smith S.C., Lu G.Q., University of Queensland, AU

Recently, single graphite layers, referred to as Graphene nanoribbons (GNR) have been prepared experimentally by using conventional methods, such as cutting mechanically exfoloiated graphenes or by patterning epitaxially grown graphenes [1-2]. On the other hand, [...]

Nano Structure of Carbon Nano Tube Products Synthesized in Solid Phase

Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Le T.V., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Huynh P.T., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Mai A.T.N., Saigon Hi Tech Park Research Laboratories, VN

Solid phase synthetic process of carbon nano tube using solid precursor comprised of solid state carbon source, metallic catalyst and tube control agent has been reported in the last Nanotech 2007 (Santa Clara). In the [...]

Multiwalled carbon nanotube films as temperature nano-sensors

Di Bartolomeo A., Giubileo F., Sarno M., Altavilla C., Sannino D., Iemmo L., Mancusi D., Bobba F., Cucolo A.M., Ciambelli P., University of Salerno, IT

The understanding of the temperature dependence of the electric resistance of carbon nanotubes (CNTs) is a very important feature for the potential utilization as sensing element in temperature nano-sensors. The sensitivity and the time response [...]

Electronic structure of single wall carbon nanotubes under transverse external electric fields, radial deformations and defects

Shtogun Y.V., Woods L.M., University of South Florida, US

Our tight-binding results show that energy gap modulations of radially deformed carbon nanotubes by external electric field can be achieved using various field amplitudes and field orientations, and deformation strengths, thus proving many more capabilities [...]

Novel Branched nanostructures of Carbon nanotubes on Si substrates suitable for the realization of gas sensors

Abdi Y., Mohajerzadeh S., Sohrabi M.H., Fathipour M., Araghchini M., University of Tehran, IR

A novel tree-like nanostructure of carbon nanotubes was prepared using growth of vertically aligned nanotubes. As an application of the structures we have used them for fabricating the gas sensor. Because of their unique branched [...]

Single Walled Carbon Nanotubes based Ionic Building Blocks for Nanoelectronic Devices

Yadav Y., Prasad S., Portland State University, US

We present electrical characterization of crossbar ionic nanodevices built using surfactant coated single walled carbon nanotubes (SWCNT’s) via microcontact printing. These nanotube ionic building blocks were synthesized using intrinsic semiconducting SWCNT’s doped with surfactant molecules, [...]

Alcohol vapor sensors using multiple spray-coated SWCNTs

Kim S.J., Choi Y.M., Lee G.W., Kyungnam University, KR

Recent advances in purification, dissolution and dispersion technologies of carbon nanotubes (CNTs) have provided opportunities for the development of various CNT gas sensors[1-2]. Here, we suggest an alcohol vapor sensor using single-walled carbon nanotube (SWCNT)-composites [...]

Single-Walled Carbon Nanotube Network based Biosensors using Aptamers and its Characteristics

Kim D.W., Seo S.M., Park Y.J., Seoul National University, KR

We have successfully demonstrated the single-walled carbon nanotube (SWNT) network based biosensor using aptamers as the protein recognition site. The single-walled carbon nanotube network was used to improve the uniformity in I-V characteristics. Aluminum was [...]

Nanocatalysts Assisted Growth of Diamond Films on Si by Hot Filament CVD

Teng C.C., Ku F.C., Deng J.P., Sung C.M., Lin C-T, Northern Illinois University, US

Four different catalysts, nano-Ni, diamond powder (250 ~ 350nm), mixture of nano-Ni/diamond powder, and ultrasonicated nanodiamond (50 nm) seed, on Si wafers were employed to investigate diamond film growth by hot filament CVD (HFCVD). Both [...]