Controllably Alloyed, Low Density, Free-standing Ni-Co and Ni-Graphene Sponges for Electrocatalytic Water Splitting. - Vineesh, Thazhe Veettil; Mubarak, Suhail; Hahm, Myung Gwan; Prabu, V.; Alwarappan, Subbiah; Narayanan, Tharangattu N. (Scientific Reports, 2016)