When solution of 3 mM H2O2 was added into the PBS, the reductive current increases rapidly and soon reaches stability. These results confirm that the TiN film deposited at the deposition angle of 85° possesses efficient electrocatalytic activity toward H2O2, which provides a promising way for fabricating sensors of detecting H2O2. However, compared with others’ works [3, 21, 22], the catalytic efficiency for H2O2 of the TiN NRAs electrode is not very high. Further work
is in need to improve selleck chemical the catalytic activity and sensitivity, such as increasing the length of TiN NRAs and enhancing the specific surface by modifying the OAD parameters. Figure 6 The linear relationship between current and the concentrate of H 2 O 2 . Inset is the current versus time after adding NVP-BGJ398 mw AA and H2O2. Conclusions TiN films with tunable porosity were fabricated by oblique angle deposition at different deposition angles. The porosity increases
with the increase of the deposition angle due to the self-shadowing effect. All the TiN films show sensitive electrochemical catalytic property towards H2O2. The film of self-standing nanorods was obtained at the deposition angle of 85° and exhibits the best performance due to its highest porosity thus the largest effective contact area with the electrolyte. Therefore, oblique angle deposition provides a promising way to fabricate TiN nanostructure as a H2O2 sensor. Acknowledgements The authors are grateful to the financial
support by the National Natural Science Foundation of China (grant nos. 51372135 and 51228101), the financial support by the National Basic Research Program of China (973 program, grant nos. 2013CB934301), the Research Project of Chinese Ministry of Education (grant no. 113007A), and the Tsinghua University Initiative Scientific Research Program. References 1. Njagi J, Chernov MM, Leiter J, Andreescu S: Amperometric detection of dopamine in vivo with an enzyme based carbon fiber microbiosensor. Anal Chem 2010, 82:989–996.CrossRef 2. Jiang LC, Zhang WD: Electrodeposition of TiO2 nanoparticles on multiwalled carbon nanotube arrays for hydrogen peroxide sensing. Electroanalysis 2009, 21:988–993.CrossRef 3. Dong S, Chen X, Gu L, Zhang L, Zhou X, Liu Z, Han P, Xu H, Yao J, Zhang X: Dimethyl sulfoxide A biocompatible titanium nitride nanorods derived nanostructured electrode for biosensing and bioelectrochemical energy conversion. Biosens Bioelectron 2011, 26:4088–4094.CrossRef 4. Starosvetsky D, Gotman I: TiN coating improves the corrosion behavior of superelastic NiTi surgical alloy. Surf Coat Technol 2001, 148:268–276.CrossRef 5. Lu X, Wang G, Zhai T, Yu M, Xie S, Ling Y, Liang C, Tong Y, Li Y: Stabilized TiN nanowire arrays for high-performance and flexible supercapacitors. Nano Lett 2012, 12:5376–5381.CrossRef 6. Musthafa OM, Sampath S: High performance platinized titanium nitride catalyst for methanol oxidation. Chem Commun 2008, 67–69. 7.