The paper presents results of the research aimed at the engineering of nanostructures (NSs). SnO 2 nanowires (NWs) were grown via vapor-solid mechanism at a synthesis temperature of 900°С in a modified setup allowing the NS morphology be encoded in a programmable way along its length. The Ti/Au (20/500 nm) electrical contacts to individual NWs were deposited via consequent PVD vacuum deposition process to obtain gas sensitive chemiresistors. Electrical properties and gas-sensing performance of

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... he obtained monocrystalline NSs with a modified shape were investigated using hydrogen and oxygen gases. It was established that structurally modified NWs, due to the presence of narrow segments, exhibit better gas-sensitive characteristics in comparison with straight NWs. Obtained results are discussed from the positions of single-crystal "neck" formation in NSs and their influence on transport properties of NWs.