Review of Paper titled: “Probing Electrical Transport in Nano...

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Review of Paper titled: “Probing Electrical Transport in Nanomaterials: Conductivity of Individual Carbon Nanotubes”

- Provide value-added commentary/critique of the paper.
- Do not provide a verbatim copy of the paper while answering the questions below.
- You may use the technical terminology within the paper.

1. Provide a half page summary of this paper?

2. Clearly explain how the authors work is different from conventional methods of measuring conductivity?

3. Explain the experimental setup and tools used by the authors in their experiment?

4. What physical characteristic affects the conductivity of nanotubes. Explain its affects.

5. Clearly explain the results of the experiment. Draw insights from this work as it relates to conductivity of nanotubes (in your own words).

6. State how the authors work can be extended to obtain a comprehensive understanding of the conductivity of nanotube?

7. What other properties can be studied using similar experimental approaches?

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1. The paper entitled “Probing Electrical Transport in Nanomaterials: Conductivity in Individual Carbon Nanotubes” explored the idea of recording the structure of nanomaterials, and determining its conductivity at the same time. The study was successfully performed by combining the methods of conventional lithography and a force microscope equipped with conducting probe tip. The experiment was set-up in a manner that the nanotubes were distributed in ethanol, deposited on an oxidized Si substrate, and then coated with a layer of sputtered Au. NbN were then used to coat commercial Si3N4 cantilever-tip assemblies through dc magnetron sputtering.

The study found out that the structurally perfect nanotubes have decreased their resistivity by certain magnitude, while the nanotube structures that has intrinsic defects were proven to have significant increase in resistivity. Overall, the study demonstrated that the characterization of the structure of nanotubes can lead to an analysis of one of its intrinsic property, that is, its resistivity. The authors then highly suggest the use of similar approach to further investigate other intrinsic properties such as mechanical properties of nanotube materials, intrinsic electrical properties of metal-filled nanotubes, and even the assessment of the validity of molecular wire, which is often used in the field of organic and biological nanostructures....

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