Eur. Phys. J. Appl. Phys.
Volume 64, Number 2, November 2013
|Number of page(s)||5|
|Section||Nanomaterials and Nanotechnologies|
|Published online||15 November 2013|
Conductivity modulation of carbon nanotubes through hybridization with quantum dots and gold nanoparticles
Department of Physics, Indian Institute of Science, Bangalore 560012, India
2 Biomolecular Electronics and Nanotechnology Division, Central Scientific Instruments Organization, Chandigarh 160030, India
3 Department of Physics, Panjab University, Chandigarh 160014, India
4 Central Electronics Engineering Research Institute, Pilani, Rajasthan, India
5 Amity Institute of Nanotechnology, Amity University, Noida, Uttar Pradesh, India
a e-mail: firstname.lastname@example.org
Revised: 9 October 2013
Accepted: 14 October 2013
Published online: 15 November 2013
CdSe/ZnS quantum dots and gold nanoparticles have been grown in-situ onto the surface of carbon nanotubes. The nanohybrids were then, dielectrophoretically aligned between gold microelectrodes and the electrical response was investigated. The conductance of nanotube-quantum dot hybrid was found to be sensitive to incident white light. The electrical resistance of the carbon nanotube-quantum dot nanohybrid decreased from 1.9 × 104 Ω (in the dark) to 0.91 × 104 Ω after the impact of white light. The electrical resistance of the carbon nanotube-gold nanoparticle nanohybrid was calculated to be 1.86 × 103 Ω, which is much smaller than that of carboxylated carbon nanotubes (4.03 × 105 Ω). Such a modulation in electrical properties may enhance the use of carbon nanotubes in future nanoscale devices.
© EDP Sciences, 2013
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