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Ultrafast synthesis of Au(I)-dodecanethiolate nanotubes for advanced Hg(2+) sensor electrodes.

Zhang Z, Ma C, He L, Zhu S, Hao X, Xie W, Zhang W, Zhang Y - Nanoscale Res Lett (2014)

Bottom Line: In this work, an ultrafast and facile method is developed to synthesize Au(I)-dodecanethiolate nanotubes (Au(I)NTs) with the assistance of glycyl-glycyl-glycine (G-G-G).According to structural analysis, a possible preparative mechanism is proposed that the G-G-G peptide could help to curl into tube-like morphology in alkaline situation spontaneously to accelerate the formation of Au(I)NTs.Meanwhile, PVDF-stabilized Au(I)NT-modified glassy carbon electrodes present their promising potential for Hg(2+) detection.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Material Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China.

ABSTRACT
In this work, an ultrafast and facile method is developed to synthesize Au(I)-dodecanethiolate nanotubes (Au(I)NTs) with the assistance of glycyl-glycyl-glycine (G-G-G). Transmission electron microscopy (TEM) images reveal that the as-prepared Au(I)NTs can be obtained in a 2-h reaction instead of a previous 24-h reaction and are uniform with a hollow structure and smooth surface by virtue of the G-G-G peptide tubular template. According to structural analysis, a possible preparative mechanism is proposed that the G-G-G peptide could help to curl into tube-like morphology in alkaline situation spontaneously to accelerate the formation of Au(I)NTs. Meanwhile, PVDF-stabilized Au(I)NT-modified glassy carbon electrodes present their promising potential for Hg(2+) detection.

No MeSH data available.


Related in: MedlinePlus

TEM images. (a, b) TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with gly-gly-gly in 2 h. (c) HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes. (d) TEM image of the products without gly-gly-gly in 2 h.
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Figure 1: TEM images. (a, b) TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with gly-gly-gly in 2 h. (c) HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes. (d) TEM image of the products without gly-gly-gly in 2 h.

Mentions: Figure 1 presents the representative TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with or without gly-gly-gly. Detailedly, Figure 1a displays a macroscopical view of uniform nanotube formation without any nanosheet, indicative of an enhancive yield [12]. Figure 1b reveals that the nanotubes have smooth surface and narrow diameter distribution with 100 nm in diameter. Since Au(I) compounds rest with beam sensitive matter, Au(I)NTs could be reduced into Au(0) nanotubes, with obvious gold nanoparticle morphology and uniform distribution (approximately 2 nm; Au+ can be deoxidated to Au0 by the electron beam) [12]. The thickness of the walls is in the range of ca. 35 nm, and the ends of the nanotubes are always open). Figure 1c shows the HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes and the well-resolved lattice fringe which is consistent with the XRD patterns. In comparison, there are only mesoporous Au(I) nanosheet without the assistance of G-G-G in initial 2 h (see Figure 1d). This porous network has sparse curling nanosheet, presenting the important role of surfactant ligands such as gly-gly-gly.


Ultrafast synthesis of Au(I)-dodecanethiolate nanotubes for advanced Hg(2+) sensor electrodes.

Zhang Z, Ma C, He L, Zhu S, Hao X, Xie W, Zhang W, Zhang Y - Nanoscale Res Lett (2014)

TEM images. (a, b) TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with gly-gly-gly in 2 h. (c) HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes. (d) TEM image of the products without gly-gly-gly in 2 h.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4226189&req=5

Figure 1: TEM images. (a, b) TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with gly-gly-gly in 2 h. (c) HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes. (d) TEM image of the products without gly-gly-gly in 2 h.
Mentions: Figure 1 presents the representative TEM images of the as-prepared Au(I)-dodecanethiolate nanotubes with or without gly-gly-gly. Detailedly, Figure 1a displays a macroscopical view of uniform nanotube formation without any nanosheet, indicative of an enhancive yield [12]. Figure 1b reveals that the nanotubes have smooth surface and narrow diameter distribution with 100 nm in diameter. Since Au(I) compounds rest with beam sensitive matter, Au(I)NTs could be reduced into Au(0) nanotubes, with obvious gold nanoparticle morphology and uniform distribution (approximately 2 nm; Au+ can be deoxidated to Au0 by the electron beam) [12]. The thickness of the walls is in the range of ca. 35 nm, and the ends of the nanotubes are always open). Figure 1c shows the HRTEM image of the as-prepared Au(I)-dodecanethiolate nanotubes and the well-resolved lattice fringe which is consistent with the XRD patterns. In comparison, there are only mesoporous Au(I) nanosheet without the assistance of G-G-G in initial 2 h (see Figure 1d). This porous network has sparse curling nanosheet, presenting the important role of surfactant ligands such as gly-gly-gly.

Bottom Line: In this work, an ultrafast and facile method is developed to synthesize Au(I)-dodecanethiolate nanotubes (Au(I)NTs) with the assistance of glycyl-glycyl-glycine (G-G-G).According to structural analysis, a possible preparative mechanism is proposed that the G-G-G peptide could help to curl into tube-like morphology in alkaline situation spontaneously to accelerate the formation of Au(I)NTs.Meanwhile, PVDF-stabilized Au(I)NT-modified glassy carbon electrodes present their promising potential for Hg(2+) detection.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Material Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China.

ABSTRACT
In this work, an ultrafast and facile method is developed to synthesize Au(I)-dodecanethiolate nanotubes (Au(I)NTs) with the assistance of glycyl-glycyl-glycine (G-G-G). Transmission electron microscopy (TEM) images reveal that the as-prepared Au(I)NTs can be obtained in a 2-h reaction instead of a previous 24-h reaction and are uniform with a hollow structure and smooth surface by virtue of the G-G-G peptide tubular template. According to structural analysis, a possible preparative mechanism is proposed that the G-G-G peptide could help to curl into tube-like morphology in alkaline situation spontaneously to accelerate the formation of Au(I)NTs. Meanwhile, PVDF-stabilized Au(I)NT-modified glassy carbon electrodes present their promising potential for Hg(2+) detection.

No MeSH data available.


Related in: MedlinePlus