Hydrazine is both a useful and toxic substance, thus its sensitive detection is highly desirable.
Yu Chen and co-workers, Nanjing Normal University, China, have used a layer-by-layer (LBL) self-assembly method to fabricate multilayers consisting of sulphydryl-functionalized multiwall carbon nanotubes (MWCNT) and gold nanoparticles (Au NPs). They have reported their use as electrochemical sensors for hydrazine detection (pictured).
The LBL self-assembly approach involved π–π stacking interactions to graft the sulphydryl groups onto the surface of the MWCNTs and exploited the strong Au–S bond interactions between the components to generate an advanced sensor with better performance compared to known sensors, e.g., detection limit of 2.0·10–7 M and linear range of 6.0·10–7 to 9.0·10–3 M.
Image: © Wiley-VCH
- Layer-By-Layer Self-Assembly of Sulphydryl-Functionalized Multiwalled Carbon Nanotubes and Phosphate-Functionalized Gold Nanoparticles: Detection of Hydrazine,
Fan Zhang, Lu Zhang, Junfei Xing, Yawen Tang, Yu Chen, Yiming Zhou, Tianhong Lu, Xinghua Xia,
ChemPlusChem 2012, 8.
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