Electrical conductivity studies of undoped solid films of C60/70

Mort, J.; Ziolo, Ronald F.; Machonkin, M. A.; Huffman, Donald R.; Ferguson, M. I.

doi:10.1016/s0009-2614(91)85142-j

Cited by 100 publications

(19 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, oxygen decreases the intrinsic conductivity of fullerites by as much as four orders of magnitude. The magnitude of this effect, together with the propensity for solid C 60 to adsorb oxygen from the surrounding atmosphere, is responsible for the unusually wide ͑up to ten orders of magnitude͒ dispersion in the values for the conductivity of C 60 reported in the literature [18][19][20][21][22][23][24][25][26][27][28][29] ͑see Fig. 4͒.…”

Section: Oxygen Diffusion Into Fullerene Solidsmentioning

confidence: 99%

Role of molecular oxygen and other impurities in the electrical transportand dielectric properties ofC60films

Hebard²,

1997

View full text Add to dashboard Cite

We have used dielectric spectroscopy to measure the frequency and temperature dependence of the lowfrequency ͑0.5 mHz-100 kHz͒ complex dielectric function () of thin C 60 films. A small charge transfer occurs between the C 60 and O 2 molecules which occupy interstitial spaces of solid C 60 exposed to oxygen ͑or ambient air͒. Due to the large size of the C 60 molecules, this small charge transfer creates large dipole moments, which in turn are coupled to the applied ac electric field via a diffusion-controlled relaxation mechanism. This gives rise to a significant increase in the permittivity 1 accompanied by a broad dielectric loss peak 2 observed at ϳ10-100 Hz. With increasing oxygenation, the interstitial sites become nearly fully occupied, interstitial hopping is inhibited, and the loss peaks, together with the enhanced polarization, disappear. Both tracer and chemical diffusion coefficients for the C 60 /O 2 system have been obtained purely from dielectric spectroscopy measurements.

show abstract

Section: Oxygen Diffusion Into Fullerene Solidsmentioning

confidence: 99%

Role of molecular oxygen and other impurities in the electrical transportand dielectric properties ofC60films

Hebard²,

1997

View full text Add to dashboard Cite

show abstract

“…These resistivity values were obtained using four-probe measurements at room temperature under atmospheric conditions. Both of which indicates a resistivity much smaller than that (10 8 - 10 14 cm) of solid C60 19,20) . As shown in Fig.…”

Section: ．Introductionmentioning

confidence: 82%

One-dimensional Metallic Peanut-shaped Nanocarbon with Positive and Negative Gaussia Curvatures: Toward a New Science of Quantum Electronic Systems on Riemannian Surface

Onoe

2009

Journal of The Surface Science Society of Japan

View full text Add to dashboard Cite

When a C60 film is irradiated with a 3 kV electron-beam (EB) gun in vacuum (base pressure : 10 −7 Pa), we have found that EB-irradiation of a C60 film gives rise to formation of a peanut-shaped C60 polymer with metallic electron-transport properties in air at room temperature. The peanut-shaped polymer has both positive and negative Gaussian curvatures (K), which can be classified into a new p-electron conjugated carbon allotrope that is different from graphite (K＝0), fullerenes (K＞0), nanotubes (K＝0 at body, K＞0 at cap edge), and hypothetical Mackay crystal (K＜0). In the present review article, we will introduce our recent results of the electron-transport, electronic, and optical properties of the nanocarbon, and describe theoretical analysis of its novel electronic properties on the basis of quantum mechanics on Riemannian surfaces. To our best knowledge, the peanut-shaped C60 polymer is only an existed material with a negative Gaussian curvature, whose electronic and optical properties are known experimentally. Thus we believe that the present system will open a new science "quantum science of condensed matters in Riemannian space".

show abstract

“…Superconducting transitions up to T, = 33 K for Rb3Ca are now known [232,233], after the initial report of T, = 18 K for K3Cm in 1991 [234]. It should be mentioned that fullerene is an insulator, 625 M S/cm [236], but upon n-doping, the conductivity jumps to 625 M 1 S/cm. It should be mentioned that fullerene is an insulator, 625 M S/cm [236], but upon n-doping, the conductivity jumps to 625 M 1 S/cm.…”

Section: Excessive Costsmentioning

confidence: 99%

Graphite, Carbonaceous Materials and Organic Solids as Active Electrodes in Metal‐Free Batteries

Beck

1997

Advances in Electrochemical Sciences and Engineering

View full text Add to dashboard Cite

Electrical conductivity studies of undoped solid films of C60/70

Cited by 100 publications

References 9 publications

Role of molecular oxygen and other impurities in the electrical transportand dielectric properties ofC60films

Role of molecular oxygen and other impurities in the electrical transportand dielectric properties ofC60films

One-dimensional Metallic Peanut-shaped Nanocarbon with Positive and Negative Gaussia Curvatures: Toward a New Science of Quantum Electronic Systems on Riemannian Surface

Graphite, Carbonaceous Materials and Organic Solids as Active Electrodes in Metal‐Free Batteries

Contact Info

Product

Resources

About