Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)

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Investigation of the electrical and optical properties of suspended carbon nanotubes

par Christelle EVE - publié le

Research Internship – 2019-2020 - Master 2

Context :
Discovered in the early 90’s, carbon nanotubes have been extensively used as a material for fundamental studies of 1D systems, in a large variety of fields such as electronics, optics, mechanics etc. Recently, a new field has emerged that probes the properties of matter confined within the hollow core of the nanotube. Given the diameter of the nanotube, in the range of 1 nm, the confinement is of molecular dimension. A new wealth of physical properties of matter is expected to arise from this extremely confined situation : self-aligned molecules [1,2], frictionless flow [3] and so on.
Up today, most experimental studies are struggling with the problem of sensitivity. Indeed, investigating individual carbon nanotubes is a challenge, owing to their small dimensions. We propose to use nanomechanics as an ultimate tool to investigate the properties of matter (in particular water) confined inside a suspended, individual, carbon nanotube.

[1] S. Cambré et al., Nature Nanotechnologies 10, 248-252 (2015)
[2] E. Gaufrès et al., Nature Photonics 8, 72-78 (2014)
[3] K. Falk et al., Nano Letters 10, 4067-4073 (2010)

Scientific and technical work :

The internship aims at probing the properties of carbon nanotubes of small diameter, isolated and long. The project will involve experimental techniques such as Raman scattering, electrical probe station and computer analysis tools. Light chemistry and clean-room techniques will be involved as well.
In this project, the student will :
-  Learn and perform photolithography of samples (clean-room work)
-  Learn and use Raman scattering to probe the properties of carbon nanotubes
-  Learn and use a probe station with SMU (Source-Measure Unit)
-  Analyze the experimental data by mean of software or computer language (Origin, Matlab, Python…)
-  Synthetize the obtained results for discussing them with the consortium of researchers involved
If needed, the student may :
-  Prepare new catalyst for the growth of nanotubes (chemistry steps, basic level)

Profile
This project is adapted for a student with a background in physics, applied physics, nanosciences or chemical physics. Prior knowledge of carbon nanotube science is not necessary. The internship involves substantial experimental work, so the taste for experimental work is mandatory. Strong taste for interdisciplinary research and learning is also essential. This internship will ideally be extended into a cutting-edge PhD project, to develop an interdisciplinary profile that is widely sought for in today’s research.

Additional information :
Length of the internship : 4 to 6 months
Starting date : flexible, to be defined with the candidate
The student will receive a grant of 500€/month
Website : https://nanomechanics.frama.site/

Contact : Adrien Noury


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