Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Projectile's mass, reactivity and molecular dependence on ion
  nanostructuring   We have reported the dependence of projectile mass along with the chemical
reactivity and nonlinear effects on ion beam induced nano structure formation
when 8 keV He1+, N1+, O1+, Ar1+ atomic ions and 16 keV N21+ and O21+ molecular
ions are bombarded on the Si (100) surface at an incidence angle of 600. Ex
situ atomic force microcopy (AFM) measurements reveals the ripple structure
development of various forms and dimensions depending on the projectiles mass,
chemical reactivity and molecular state. This experimental study explores the
necessary requirements for ion induced nanopatterning and their control.

29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
9
The categories of this paper are: nlin