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Self-assembly directed synthesis of Au nanorices induced by polyaniline and their enhanced peroxidase-like catalytic properties
- Source :
- Journal of Materials Chemistry C. 5:7465-7471
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (RSC), 2017.
-
Abstract
- The self-assembly of noble metal nanoparticles into new-fashioned one, two and three-dimensional structures is very important due to their superior properties in optics, electrics, catalysis, and chemical sensing compared with individual nanoparticles. Here, we first report a facile one-step approach that allows the fabrication of assembled Au nanorices induced by polyaniline (PANI). During the synthesis, a complex of HAuCl4-(3-aminopropyl)triethoxysilane (APTES) acts as both a soft template and an oxidant; then the reduction of HAuCl4 is accompanied by the oxidation of aniline, resulting in the formation of Au nanorices within a PANI matrix. The application of the prepared Au/PANI nanorices as enzyme mimics toward the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) is demonstrated. The resultant Au/PANI nanorices display an enhanced peroxidase-like catalytic activity compared with individual Au nanospheres and PANI nanofibers alone, revealing a synergistic effect between Au and PANI components in the Au/PANI nanorices. The Au/PANI nanorices are also used as efficient surface-enhanced Raman scattering (SERS) substrates for in situ monitoring of the oxidation process of TMB during the peroxidase-like catalytic reaction. On the basis of the SERS technique, a discernible detection level of H2O2 as low as 10−8 M is obtained. We envision that such a system may show more potential applications in biocatalysis, disease diagnosis and environmental monitoring.
- Subjects :
- Materials science
Nanoparticle
Nanotechnology
02 engineering and technology
General Chemistry
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Catalysis
chemistry.chemical_compound
Aniline
chemistry
Chemical engineering
Nanofiber
Polyaniline
Triethoxysilane
Materials Chemistry
engineering
Noble metal
Self-assembly
0210 nano-technology
Subjects
Details
- ISSN :
- 20507534 and 20507526
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry C
- Accession number :
- edsair.doi...........2f895bcc4968023d3b5f122bee0d6b6b