This article presents a citation-based mapping exercise in the nanosciences field and a first sketch of citation transactions
(a measure of cognitive dependences). Nanosciences are considered to be one of the “convergent” components shaping the future
of science and technology. Recurrent questions about the structure of the field concern its diversity and multi- or inter-disciplinarity.
Observations made from various points of view confirm a strong differentiation of the field, which is scattered in multiple
galaxies with moderate level of exchanges. The multi-disciplinarity of themes and super-themes detected by mapping also appears
moderate, most of the super-themes being based on physics and chemistry in various proportions. Structural analysis of the
list of references in articles suggests that the moderate multi-disciplinarity observed at the aggregate level partly stems
from an actual inter-disciplinarity at the article level.