Ionic liquid-stabilized non-spherical gold nanofluids synthesized using a one-step method
1 Laboratory on Steam Power System, Wuhan Second Ship Design and Research Institute, Wuhan, Hubei, 430064, People’s Republic of China
2 CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
Nanoscale Research Letters 2012, 7:583 doi:10.1186/1556-276X-7-583Published: 23 October 2012
Ionic liquid (IL)-stabilized non-spherical gold nanofluids have been synthesized by a one-step method in aqueous solution. The whole reaction proceeded in room temperature. In the presence of amino-functionalized ionic liquids, gold nanofluids with long-wave surface plasmon resonance (SPR) absorption (>600 nm) could be obtained by adopting tannic acid as the reductant. The specific SPR absorption was related to the non-spherical gold nanoparticles including gold triangle, decahedra, and icosahedra nanocrystals. All the nanocrystals were observed by transmission electron microscopy. It was deduced that the formation of non-spherical gold nanofluids was related to the hydroxyls in tannic acid while IL acted as the synthesis template.