We are pleased to publish the 3 volume, 6th issue, 2012 of the Advanced Materials Letters with selected peer-reviewed papers presented in the “International Conference on Nanomaterials and Nanotechnolgy (ICNANO 2011)”, which was held at the conference center, University of Delhi, India during 18-21 December 2011. This conference was organized by the International Association of Advanced Materials (IAAM), University of Delhi and VBRI Press. The purpose of conference was to bring together leaders from industry and academia in research, design, development and application of nanomaterials and nanotechnology. Scientific themes of conference were: Nano-Optoelectronics, Nano-Biomaterials & Biomedical Nanotechnology, Nano-Advanced Materials, Nano-Fabrication, Nano-Characterization, Nano-Green Energy & Environment, and Nano-Computational Simulation & Theory.