We test the transfer learnt NN with a validation set of 2000-3000 structures that was not part of the training process. Fig. 6 (b) shows the correlation between AL-NN predicted energies vs. reference DFT energies. As expected, we find that the re trained NN is able to reliably predict the nano cluster energies. We observe significant improvement in the accuracy of energy as well as force prediction by the NN with respect to the DFT predictions as seen in Fig. ).