I analyze my network with cytoscape and now i have lots of their trait like betweenness, closeness,degree and... but i don't know how to choose my novel node base on these things.
You would have to make a decision about which topological parameters to look at based on the list you have provided. I do not know which criteria you have used to define a 'novel' node but once again, that is a decision you should reach based on literature survey.