Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrical Contacts to Carbon Nanotubes Down to 1nm in Diameter   Rhodium (Rh) is found similar to Palladium (Pd) in making near-ohmic
electrical contacts to single-walled carbon nanotubes (SWNTs) with diameters d
> ~ 1.6 nm. Non-negligible positive Schottky barriers (SBs) exist between Rh or
Pd and semiconducting SWNTs (S-SWNTs) with d < ~ 1.6 nm. With Rh and Pd
contacts, the characteristics of SWNT field-effect transistors (FETs) and SB
heights at the contacts are largely predictable based on the SWNT diameters,
without random variations among devices. Surprisingly, electrical contacts to
metallic SWNTs (M-SWNTs) also appear to be diameter dependent especially for
small SWNTs. Ohmic contacts are difficult for M-SWNTs with diameters < ~ 1.0 nm
possibly due to tunnel barriers.

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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
3
The categories of this paper are: physics