  We present multi-wavelength analysis around mid-infrared bubble N14 to probe
the signature of triggered star formation as well as the formation of new
massive star(s) and/or cluster(s) on the borders of the bubble by the expansion
of the H II region. Spitzer-IRAC ratio maps reveal that the bubble is traced by
the polycyclic aromatic hydrocarbon emission following an almost circular
morphology except in the south-west direction towards the low molecular density
environment. The observational signatures of the collected molecular and cold
dust material have been found around the bubble. We have detected 418 YSOs in
the selected region around the bubble N14. Interestingly, the detected YSO
clusters are associated with the collected molecular and cold dust material on
the borders of the bubble. One of the clusters is found with deeply embedded
intermediate mass and massive Class I YSOs associated with one of the dense
dust clumps in the east of the bubble N14. We do not find a good agreement
between the dynamical age of the H II region and the fragmentation time of the
accumulated molecular materials to explain possible "collect-and-collapse"
process around the bubble N14. Therefore, we suggest the possibility of
triggered star formation by compression of the pre-existing dense clumps by the
shock wave and/or small scale Jeans gravitational instabilities in the
collected materials. We have also investigated 5 young massive embedded
protostars (8 to 10 M_sun) and 15 intermediate mass (3 to 7 M_sun) Class I YSOs
which are associated with the dust and molecular fragmented clumps at the
borders of the bubble. We conclude that the expansion of the H II region is
also leading to the formation of these intermediate and massive Class I YSOs
around the bubble N14.
