The Comparison of Creation Methods of Gold Catalyst Nanoseeds for Deterministic One-to-One Growth of SnO2 Nanowires

Recently, Q1D (Quasi-One-Dimensional) nanostructures like nanowires, nanobelts and nanofibers, have gained a considerable attention due to their potential in the development of smart functional materials, devices and systems. Its electrical properties can be interested if such nanostructures are made from semiconductors like SnO2, ZnO, In2O3, SiO2 [1,2]. Semiconductive tin oxide nanowires (SnO2 NWs) because of their unique conductance properties are promising candidates for ultrasensitive chemical miniaturized sensors [2].Metal oxide NWs are synthesized by thermal deposition of oxide powders under controlled conditions based on vapor-liquid-solid (VLS) mechanism with the presence of metal catalyst. For their synthesize it is necessary first to pattern the metal catalyst nucleus (like nanoparticles / nanoislands of gold) on the substrate [2,3].Various methods for creation of this nanoseeeds have been reported include: chemical vapor deposition (CVD) [4], physical vapor deposition (PVD) [5], and solvothermal reactions [6].In this research, effect of creation methods of gold catalyst nanoseeds on the growth of SnO2 NWs is investigated. One-to-one growth (1-1growth) that means each nanoparticle or nanoisland of gold seed produces one SnO2 NW by thermal chemical reaction vapor transport deposition (TCRVTD) method, was studied