Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Poisson-Nernst-Planck Model of Bipolar Nano uidic Diode Based on
  Bulletlike Nanopore   Bipolar nanofluidic diode is based on nanopore with positive and negative
surface charges separated by a junction. This paper investigates the effects of
the pore structure, taking the bullet-like pore as an example, on the ion
current rectification. The Poisson-Nernst-Planck Modelings show that the ion
current rectification behavior can be greatly influenced by the shape of the
pore. The bipolar nanofluidic diode with more tapered tip has significantly
higher ion current rectification degree. The modelling results indicate that
special design of the nanopore is necessary for the performance of the bipolar
nanofluidic diode.

33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
3
The categories of this paper are: physics