Prabhu S. Yavvari, Avinash Bajaj, and Aasheesh Srivastava Indian Patent Application No. 201711023939. 09 July, 2018 The present embodiment relates to polymeric nanogel formulations, and more particularly to nanogel formulations for delivery of therapeutic, diagnostic and theranostic cargos/loads such as siRNA, miRNA, plasmid DNA (pDNA), proteins, peptides, drugs and inorganic nanomaterials (Au, Ag, SiO2), or any combination/conjugates thereof.