Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7142476 | Sensors and Actuators B: Chemical | 2017 | 7 Pages |
Abstract
Ultra-pure monolayer-capped gold nanoparticles for chemical gas sensing devices were prepared by a novel two-step process: a physical vapour deposition technique was first employed to make dispersed ultra-pure size-controlled gold nanoparticles, and this step was followed by a coating process for functionalization of the gold nanoparticles with an organic ligand, specifically dodecanethiol. X-ray photoelectron spectroscopy proved that the nano-assemblies had high purity. Chemical sensing devices based on these nano-assemblies showed Schottky-diode behaviour. We believe this is the first observation of Schottky-diodes fabricated from nanomaterials based on metallic nanoparticles. Gas sensing experiments demonstrated that these devices were suitable for detecting volatile organic compounds.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Radu Ionescu, Umut Cindemir, Tesfalem Geremariam Welearegay, Raul Calavia, Zouhair Haddi, Zareh Topalian, Claes-Göran Granqvist, Eduard Llobet,