Synthesis and Properties of Tadpole-Shaped Gold Nanoparticles

Hu, Jianqiang; Zhang, Yong; Liu, Bo; Liu, Jinxuan; Zhou, Haihui; Yan, Xu; Jiang, Yu-Xiong; Yang, Zhilin; Zhang, Tian

doi:10.1021/ja049738x

Cited by 126 publications

(88 citation statements)

References 28 publications

(26 reference statements)

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“…Recently, tadpole-shaped gold nanocrystals were produced. [21] The (HRTEM) image (Figure 3; see Supporting Information for further images) of a single tadpole-shaped ceria nanocrystal revealed that the spherical head and the wire-shaped tail grew epitaxially along the (200) planes with an interplanar distance of 0.27 nm. The XRD pattern showed that the tadpole-shaped ceria nanowires have a cubic fluorite structure (Figure 4).…”

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confidence: 99%

Large‐Scale Nonhydrolytic Sol–Gel Synthesis of Uniform‐Sized Ceria Nanocrystals with Spherical, Wire, and Tadpole Shapes

et al. 2005

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Spawning nanostructures: Uniform‐sized ceria nanocrystals with sphere, wire, and tadpole shapes were synthesized from the nonhydrolytic sol–gel reaction of cerium(III) nitrate and diphenyl ether in the presence of appropriate surfactants. The picture shows a TEM image of a batch of tadpole‐shaped nanowires (bottom left) and low‐magnification and high‐resolution TEM images of a single tadpole‐shaped nanowire (right and top left, respectively).

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Large‐Scale Nonhydrolytic Sol–Gel Synthesis of Uniform‐Sized Ceria Nanocrystals with Spherical, Wire, and Tadpole Shapes

et al. 2005

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“…According to the SERS mechanism rough surface with nanoscale gaps or tips can generate stronger localized surface plasmon resonance (LSPR) compared with the smooth ones [29][30][31]. Though many gold nanoparticles with branched tips, such as tadpole- [32], star- [33], and urchin-shaped [34], were synthesized with enhanced SERS activities, few researches have been carried on the growth of branched gold shell on the magnetic cores with improved SERS performance.…”

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confidence: 99%

Synthesis of magnetic core-branched Au shell nanostructures and their application in cancer-related miRNA detection via SERS

et al. 2017

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Magnetic core gold shell nanostructures which integrate both SERS activity and superparamagnetism are widely utilized in SERS-based detection as SERS substrates, sample separation and preconcentration operators, as well as external magnetic field controlled directional carrier. However, most of the reported gold shells coated on the magnetic cores had smooth surfaces rather than branched nanostructures with enhanced SERS activity. Here, a novel type of Fe3O4-Au core-shell nanoparticles with branched gold shell was prepared by a seed-mediated method together with the shape induction agent AgNO3, and their growth process and mechanism, properties, as well as morphologically controlled synthesis were also investigated. The branched gold coated magnetic nanoparticles (B-GMNPs) with improved SERS performance were further utilized to build superparamagnetic and SERS-active capturers by assembling tetrahedral DNA onto their surfaces for sandwich-structured detection of cancer-related biomarker miRNA-21. The experimental results indicate that highly sensitive and specific detections can be obtained by the proposed SERS sensing system including B-GMNPs and tetrahedral DNA, and the limit of detection (LOD) of miRNA-21 in serum is 623 amol L −1 . These B-GMNPs can be used as good SERS substrates with the functions of external magnetic field controlled sample separation and directional enrichment for effective SERS-based biochemical sensing and detections.

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“…One of the recent promising works in this field is the controlled synthesis of branched nanostructures, such as nanotadpoles [5], nanokites [6], nanoleaves [7] and highly branched nanoplates [8]. These asymmetrical nanostructures have generated particular interest because of their unusual structure and potential applications in molecular labelling and nanoelectronics [9].…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of gold nanosnakes assisted by poly(vinyl pyrrolidone)–sodium dodecyl sulphate aggregations

Ren

et al. 2013

Journal of Experimental Nanoscience

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Anisotropic single-crystalline gold nanosnakes were synthesised in poly(vinyl pyrrolidone) (PVP)-sodium dodecyl sulphate (SDS) aggregation aqueous solution by reducing HAuCl 4 with PVP without any additional reducing agent. The crystal structures, growth process and the influence of SDS concentrations on the growth of gold nanosnakes have been investigated by X-ray diffraction and transmittance electron microscopy. In this approach, the peculiar structure of PVP-SDS aggregations is indispensable for the asymmetrical formation of gold nanosnakes. Without PVP-SDS aggregations, only long tortuous gold nanobelts were synthesised. When SDS concentration was increased from 3 to 10 mM, gold nanosnakes, nanokites and nanoplates were fabricated. To the best of our knowledge, this is the first report on the SDS-induced shape transformation from snake-like to plate-like at fixed low HAuCl 4 concentration in PVP-SDS aggregation aqueous solutions. Moreover, the gold nanosnakes exhibit excellent electrocatalytic property towards the oxidation of methanol indicating their potential applications in fuel cells, catalysis, biosensing and nanodevices.

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Synthesis and Properties of Tadpole-Shaped Gold Nanoparticles

Cited by 126 publications

References 28 publications

Large‐Scale Nonhydrolytic Sol–Gel Synthesis of Uniform‐Sized Ceria Nanocrystals with Spherical, Wire, and Tadpole Shapes

Large‐Scale Nonhydrolytic Sol–Gel Synthesis of Uniform‐Sized Ceria Nanocrystals with Spherical, Wire, and Tadpole Shapes

Synthesis of magnetic core-branched Au shell nanostructures and their application in cancer-related miRNA detection via SERS

Controlled synthesis of gold nanosnakes assisted by poly(vinyl pyrrolidone)–sodium dodecyl sulphate aggregations

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