Formation of coupled quantum dots in single-wall carbon nanotubes

Ishibashi, K.; Suzuki, M.; Ida, T.; Aoyagi, Y.
September 2001
Applied Physics Letters;9/17/2001, Vol. 79 Issue 12, p1864
Academic Journal
The triple-barrier coupled quantum dots have been fabricated in individual single-wall carbon nanotubes by depositing a narrow SiO[sub 2] layer in between metallic source–drain contacts. The current–voltage characteristics at 4.2 K with different gate voltages before the SiO[sub 2] deposition have indicated the formation of a single quantum dot. After the SiO[sub 2] deposition, the irregular Coulomb diamonds and the negative differential conductance have been observed, which suggests the formation of coupled quantum dots. © 2001 American Institute of Physics.


Related Articles

  • In situ scanning tunneling microscopy study of C-induced Ge quantum dot formation on Si(100). Leifeld, O.; Muller, E.; Grutzmacher, D.; Muller, B.; Kern, K. // Applied Physics Letters;2/15/1999, Vol. 74 Issue 7, p994 

    Describes the deposition of submonolayer coverages of carbon on silicon(100) prior to germanium growth leading to the formation of germanium quantum dots. High density of irregularly shaped islands for Ge coverages; Increase in the height of the islands; Formation of larger-faceted island at a...

  • A General Method Towards Efficient Synthesis and Fluorescence Tuning of Carbon Black-Derived Carbon Dots via Controlled Liquid Oxidization. Yuan, Haoran; Denian Li; Yan Liu; Chuanxi Xiong // Australian Journal of Chemistry;2015, Vol. 68 Issue 9, p1446 

    Efficient synthesis and controlled modification of carbon dots (CDs) with tuneable properties on the basis of facile technical routes are of great significance for user-defined applications as well as more insightful understanding of the unique fluorescence from carbon nanomaterials. In this...

  • Size effect of quantum conductance in single-walled carbon nanotube quantum dots. Liu, H.; Tao, Y. // European Physical Journal B -- Condensed Matter;Dec2003, Vol. 36 Issue 3, p411 

    The quantum conductance of two kinds of carbon nanotube quantum dots (CNQD) composed of (5,5) and (10,0) tubes, namely (10,0)/(5,5)/(10,0) and (5,5)/(10,0)/(5,5) with different quantum sizes, are calculated. It is shown that for (10,0)/(5,5)/(10,0) CNQD, one on-resonant peak at the Fermi energy...

  • Control of core-shell structure and elemental composition of binary quantum dots. Levchenko, I.; Rider, A. E.; Ostrikov, K. // Applied Physics Letters;5/7/2007, Vol. 90 Issue 19, p193110 

    The possibility of initial stage control of the elemental composition and core/shell structure of binary SiC quantum dots by optimizing temporal variation of Si and C incoming fluxes and surface temperatures is shown via hybrid numerical simulations. Higher temperatures and influxes encourage...

  • This issue.  // Nature Nanotechnology;Oct2007, Vol. 2 Issue 10, pv 

    The article discusses various reports published within the issue, including one on single-walled carbon nanotubes and another on proposals for spin-based quantum bits based on quantum dots.

  • All Carbon-Based Photodetectors: An eminent integration of graphite quantum dots and two dimensional graphene. Shih-Hao Cheng; Tong-Min Weng; Meng-Lin Lu; Wei-Chun Tan; Ju-Ying Chen; Yang-Fang Chen // Scientific Reports;9/20/2013, p1 

    Photodetectors with ultrahigh sensitivity based on the composite made with all carbon-based materials consisting of graphite quantum dots (QDs), and two dimensional graphene crystal have been demonstrated. Under light illumination, remarkably, a photocurrent responsivity up to 43107 AW21 can be...

  • Optoelectronics of stochiometrically controlled palladium telluride quantum dots. Masikini, Milua; Ndangili, Peter M.; Ikpo, Chinwe O.; Feleni, Usisipho; Duoman, Samantha; Sidwaba, Unathi; Waryo, Tesfaye T.; Baker, Priscilla G. L.; Iwuoha, Emmanuel I. // Journal of Nano Research;2016, Vol. 40, p29 

    Water dispersed PdTe semiconducting nanocrystals were synthesized and stabilised with 3- mercaptopropionic acid (3-MPA). HRTEM studies revealed the formation of spherical nanoparticles of average size ~4 nm with good crystallinity. UV-visible spectral analysis and band gap measurements confirmed...

  • Researchers Develop Method of Producing LEDs from Food Waste.  // Fiber Optics Weekly Update;10/16/2015, Vol. 35 Issue 42, p5 

    The article reports that researchers from the University of Utah Metallurgical Engineering Department have developed a method to manufacture light emitting diodes (LED) through the use of carbon dots (CD) derived from food and beverage waste sources.

  • A Simple and Practical Synthetic Method of Carbon Quantum Dots. LIANG GUO; YONG ZHANG; RUO-XI ZHANG // Asian Journal of Chemistry;2014, Vol. 26 Issue 24, p8529 

    Compared with the traditional quantum dots, carbon quantum dots have excellent optical properties, low cell toxicity, good biocompatibility, easy functionalization and low cost, etc. Recently the synthesis of water-soluble carbon quantum dots have attracted more and more attention of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics