Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Self-assembly of Silver Nanoparticles and Multiwall Carbon Nanotubes on Decomposed GaAs Surfaces | Nanoscale Res Lett 2010 5 1737-1743 DOI s11671-010-9703-1 NANO EXPRESS Self-assembly of Silver Nanoparticles and Multiwall Carbon Nanotubes on Decomposed GaAs Surfaces S. H. Al-Harthi K. P. Revathy F. Gard A. Mesli A. K. George J. Bartringer M. Mamor N. V. Unnikrishnan Received 2 June 2010 Accepted 13 July 2010 Published online 25 July 2010 The Author s 2010. This article is published with open access at Abstract Atomic Force Microscopy complemented by Photoluminescence and Reflection High Energy Electron Diffraction has been used to study self-assembly of silver nanoparticles and multiwall carbon nanotubes on thermally decomposed GaAs 100 surfaces. It has been shown that the decomposition leads to the formation of arsenic platelike structures. Multiwall carbon nanotubes spin coated on the decomposed surfaces were mostly found to occupy the depressions between the plates and formed boundaries. While direct casting of silver nanoparticles is found to induce microdroplets. Annealing at 300 C was observed to contract the microdroplets into combined structures consisting of silver spots surrounded by silver rings. Moreover casting of colloidal suspension consists of multiwall carbon nanotubes and silver nanoparticles is observed to cause the formation of 2D compact islands. Depending on the multiwall carbon nanotubes diameter GaAs multiwall carbon nanotubes silver system exhibited photoluminescence with varying strength. Such assembly provides a possible S. H. Al-Harthi K. P. Revathy F. Gard A. K. George M. Mamor Physics Department College of Science Sultan Qaboos University . Box 36 Al Khod 123 Oman e-mail salim1@ K. P. Revathy N. V. Unnikrishnan School of Pure and Applied Physics Mahatma Gandhi University Kottayam 686 560 Kerala India A. Mesli IM2NP UMR 6242 CNRS Universite Aix-Marseille Av. Normandie-Niemen 13397 Marseille Cedex 20 France J. Bartringer Institut d Electronique du Solide et des Systemes CNRS ULP Strasbourg France
