Baccar Hamdi, Thamri Atef, Clément Pierrick, Llobet Eduard, Abdelghani Adnane
Carthage University, National Institute of Applied Science and Technology, Nanotechnology Group, Bp676, Centre Urbain Nord, 1080 Charguia Cedex, Tunisia.
Carthage University, National Institute of Applied Science and Technology, Nanotechnology Group, Bp676, Centre Urbain Nord, 1080 Charguia Cedex, Tunisia ; Carthage University, Unité de Recherche de Synthèse et Structure de Nanomatériaux (UR11ES30), Faculté des Sciences de Bizerte, Jarzouna, 7021, Tunisia.
Beilstein J Nanotechnol. 2015 Apr 9;6:919-27. doi: 10.3762/bjnano.6.95. eCollection 2015.
Here we report on the gas sensing properties of multiwalled carbon nanotubes decorated with sputtered Pt or Pd nanoparticles. Sputtering allows for an oxygen plasma treatment that removes amorphous carbon from the surface of the carbon nanotubes and creates oxygenated surface defects in which metal nanoparticles nucleate within a few minutes. The decoration with the 2 nm Pt or the 3 nm Pd nanoparticles is very homogeneous. This procedure is performed at the device level (i.e., for carbon nanotubes deposited onto sensor substrates) for many devices in one batch, which illustrates the scalability for the mass production of affordable nanosensors. The response to selected aromatic and non-aromatic volatile organic compounds, as well as pollutant gases has been studied. Pt- and Pd-decorated multiwalled carbon nanotubes show a fully reversible response to the non-aromatic volatile organic compounds tested when operated at room temperature. In contrast, these nanomaterials were not responsive to the aromatic compounds studied (measured at concentrations up to 50 ppm). Therefore, these sensors could be useful in a small, battery-operated alarm detector, for example, which is able to discriminate aromatic from non-aromatic volatile organic compounds in ambient.
在此，我们报道了溅射沉积铂或钯纳米颗粒修饰的多壁碳纳米管的气敏特性。溅射过程中可进行氧等离子体处理，该处理能去除碳纳米管表面的无定形碳，并产生含氧表面缺陷，金属纳米颗粒可在几分钟内在这些缺陷处成核。用2纳米铂或3纳米钯纳米颗粒进行的修饰非常均匀。此过程在器件层面（即针对沉积在传感器基板上的碳纳米管）对多个器件进行批量操作，这体现了大规模生产经济实惠的纳米传感器的可扩展性。研究了对选定的芳香族和非芳香族挥发性有机化合物以及污染气体的响应。铂和钯修饰的多壁碳纳米管在室温下对所测试的非芳香族挥发性有机化合物表现出完全可逆的响应。相比之下，这些纳米材料对所研究的芳香族化合物无响应（在浓度高达50 ppm时测量）。因此，这些传感器可用于小型、电池供电的报警探测器，例如，能够在环境中区分芳香族和非芳香族挥发性有机化合物。
