geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The oscillatory characteristics of a 2C60/CNT oscillator system


, : The oscillatory characteristics of a 2C60/CNT oscillator system. Journal of Nanoscience and Nanotechnology 7(4-5): 1512-1517

The authors have studied, using molecular dynamic (MD) simulations, the oscillatory characteristics of a 2C60/CNT oscillator system, in which two C60 fullerenes oscillate inside a single walled carbon nanotube (CNT) in two basic modes, i.e., the symmetric and non-symmetric motions. In the symmetric mode, with each oscillation the two fullerenes move symmetrically from the CNT ends towards the CNT center where they bounce off each other and head back towards the ends. In the non-symmetric mode, the two fullerenes move back and forth inside the CNT crossing the center point of the CNT together with each oscillation. The simulations show that the non-symmetric oscillation mode is stable for the prescribed initial (maximum) velocities up to 300 m/s, while the symmetric oscillation mode however, experiences dynamic instabilities for a prescribed initial (maximum) velocity larger than 250 m/s. The instability takes place as a result of the transfer of energy from the translational to the rotational motion of the fullerenes. This characteristic differentiates 2C60/CNT oscillators from double-walled CNT oscillators. The rotation is primarily caused by the inter-colliding of the two fullerenes, which subjects the fullerenes to large van der Waals repelling forces. These repelling forces are not necessarily aligned perfectly along the CNT axis nor precisely pointing towards the mass centers of the fullerenes. These misalignments cause the fullerenes to rock around the CNT's axis, while their offsets from the mass centers cause the fullerenes to rotate. The rocking motion, being severely confined by the CNT, does not gain much energy itself, but instead, channels energy from translational to rotational motion. The energy channeling is found to be reversed in some very short time intervals, but the rotational motion always gains energies from the translational motion over a time interval that is long enough at the MD time scale. This feature, contrary to our experiences in the macroscopic world, appears to be unique for such nanoscopic mechanical systems.

US$29.90

PMID: 17450919


Other references

Aguilar, P.C.; Jacobsen, S.E., 2003: Cultivation of quinoa on the Peruvian altiplano. Quinoa (Chenopodium quinoa) cultivation in the Peruvian altiplano occurs under environmental conditions that change from year to year, including adverse climatic conditions such as drought, flooding, hail and frost. Under such conditions, ensuring...

Ishiguro Makio, 2001: An essay on the modeling of signal and noise; inspired by the Earth tide data analysis. Decomposition of data into signal and noise is discussed. For a researcher, noise is the useless part of data. Signal is the useful part. The classification is not the property of data itself, but depends on the point of view of the researcher. In...

Robitzki, A.A.; Kurz, R., 2010: Biosensing and drug delivery at the microscale : novel devices for controlled and responsive drug delivery. An overall objective of pharmaceutical research is the controlled release or delivery of drugs at the biological target site in a therapeutically and pharmacodynamically optimal amount. In relation to "intelligent" drug delivery, several...

Milks, M.M.; Couri, D., 1984: Trichloroethylene effects on the formation of enzyme-altered foci in rat liver. The initiating and promoting effects of trichloroethylene in rat liver were investigated using the enzyme-altered foci bioassay. The incidence of gamma-glutamyl transpeptidase (GGT)-positive foci was used as an early histochemical marker of putati...

Martin, K.L.M.; Lighton, J.R.B., 1989: Aerial CO2 and O2 exchange during terrestrial activity in an amphibious fish, Alticus kirki (Blenniidae). Copeia(3): 3-7

E.D.n, H.A.S.; E.S.ntil, F.S., 2002: Effect of wintering honeybee colonies on susceptibility of honeybee workers to toxicity of some pesticides. The effects of overwintering honeybee (Apis mellifera carnica) colonies on the susceptibility of honeybee workers to organophosphate, pyrethroid and carbamate insecticides were determined under laboratory conditions. Foraging honeybee workers from...

Benizri, E.; Schoeny, A.; Picard, C.; Courtade, A.; Guckert, A., 1997: External and internal root colonization of maize by two Pseudomonas strains: enumeration by enzyme-linked immunosorbent assay (ELISA). Maize root colonization by two fluorescent Pseudomonas strains M.3.1. and TR335, isolated respectively from maize and tomato roots, were studied in hydroponic conditions. Each bacterium was inoculated separately, and three different colonization a...

Hofstaedter F.; Jakse G., 1980: Specific red cell adherence test in bladder cancer pre neoplastic and normal urothelium a prospective study. Prostate 1(1): 130

Ma, F.; Liu, Z.; Wang, T-Wei.; Hopkins, M.T.; Peterson, C.A.; Thompson, J.E., 2011: Arabidopsis eIF5A3 influences growth and the response to osmotic and nutrient stress. AteIF5A3, one of three genes encoding eukaryotic translation initiation factor 5A (eIF5A) in Arabidopsis thaliana, and corresponding genes PdeIF5A3 from Populus deltoides (eastern cottonwood) and SleIF5A4 from Solanum lycopersicum (tomato) were co...

Li, W-nan.; Xu, Q.; Wang, Y-hong.; Chen, D-wei., 2015: Poly(β-amino esters)-based barriers for tumor targeted delivery system. Poly(β-amino esters) (PBAE) are used for drug carrier and have many advantages, such as pH-sensitivity, low toxicity, structural diversity and the synthetic method of PBAE is easy. Therefore they are possessed broad application prospect in tumor-...