Thin Films and Devices Section, Technical Physics Division, Bhabha Atomic Research Center, Mumbai 400 085, India.
Talanta. 2010 Sep 15;82(4):1485-9. doi: 10.1016/j.talanta.2010.07.026. Epub 2010 Jul 17.
We present room temperature chemiresistive gas sensing characteristics of drop casted sulphonated copper phthalocyanine (CuTsPc) films. It has been demonstrated that these films are highly selective to Cl(2) and the sensitivity in the 5-2000 ppb range varies linearly between 65 and 625%. However, for concentrations >or=2000 ppb, the response becomes irreversible, which is found to be due to the chemical bond formation between Cl(2) and SO(3)Na group of CuTsPc films. The X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) data confirms the oxidation of SO(3)Na group by Cl(2) gas.
我们展示了滴铸磺化铜酞菁（CuTsPc）薄膜在室温下的化学电阻式气体传感特性。研究表明，这些薄膜对 Cl2 具有高度选择性，在 5-2000 ppb 范围内的灵敏度在 65 到 625%之间呈线性变化。然而，对于浓度≥2000 ppb 的 Cl2，响应变得不可逆，这是由于 Cl2 与 CuTsPc 薄膜的 SO3Na 基团之间形成了化学键。X 射线光电子能谱（XPS）和傅里叶变换红外（FTIR）数据证实了 SO3Na 基团被 Cl2 气体氧化。
