Bus line C6, from Saint-Martin d’Hères, and n°22, from Saint-Egrève, can get you to Institut Néel.
Bus line C6 can drop you to "Polygone Scientifique" from Saint-Martin d’Hères. Bus line n°22 can get you to Polygone scientifique from Saint-Egrève railway station to "presqu’ile" bus stop.