Fabrication of tin dioxide nanowires with ultrahigh gas sensitivity by atomic layer deposition of platinum
作者： Yu-Hung Lin , Yang-Chih Hsueh , Po-Sheng Lee , Chih-Chieh Wang , Jyh Ming Wu
DOI: 10.1039/C1JM10785B
关键词: Nanowire 、 Nanostructure 、 Atomic layer deposition 、 Surface modification 、 Nanotechnology 、 Materials science 、 Schottky barrier 、 Tin dioxide 、 Platinum 、 Catalysis
摘要: Gas-sensing properties of SnO2 nanowires were investigated before and after their surface functionalization by the atomic layer deposition (ALD) Pt nanoparticles. The morphology, size, concentration particles on can be controlled varying number ALD reaction cycles, therefore, gas-sensing altered via catalyst effect modification Schottky barrier junctions nanowire in vicinity Pt-decorated obtained 200 cycles exhibited an ultrahigh gas sensitivity (S = Ig/Ia) ∼8400 to 500 ppm ethanol vapor at °C. This provides efficient route for strongly enhancing semiconducting nanostructures fabricating sensors that are highly sensitive responsive.
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