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Download Metallic Nanomaterials (Nanomaterials for Life Sciences by Challa S. S. R. Kumar PDF

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By Challa S. S. R. Kumar

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Insights into the phase composition of several surfactant/water/oil systems have already been reported [131–137], and a direct relationship between template morphology and the synthesis of Cu NPs has been demonstrated [11, 138–140]. 10; middle row). 10; bottom row). g. 11) [141–143]. The use of alternative anionic surfactants such as SDS [144], or the use of AOT mixed with cationic surfactants [145] in more complex w/o microemulsions, has also been explored. Similar to the case of other metals, for the w/AOT/oil soft-synthesis of Cu NPs, a number of reducing agents has been investigated: hydrazine and NaBH4 are definitively the most frequently employed, although alternative chemicals, including natural molecules such as quercetin [146] have also been proposed.

6 Cu NPs Capped by Nonionic Surfactants or Stabilizers During the late 1990s, the synthesis was reported of Cu NPs stabilized by nonionic commercially available surfactants such as Triton X-100 [179] and Genamin TO20 [180]. 16). 15 TEM images of Cu (a), Cu2O (d) and CuO (g) nanorods. Single nanorod images of (b) Cu, Cu2O (e) and CuO (h). High-resolution TEM micrographs of Cu (c), Cu2O (f) and CuO (i) nanorods. The insets are SAED images of Cu, Cu2O and CuO nanorods, respectively. 1039/b304505f.

The halide–Cu(II) complexes are driven by the electric field to the cathode, where they are electrochemically reduced. 27 (a) Sketch of a sacrificial anode electrolysis; (b) Scheme of processes taking place at the cathode surface. stabilizer will prevent undesired growth and aggregation. 27b). A variety of different stabilizer chain lengths was explored and potential values applied in order to understand how the experimental conditions can affect NPs size-modulation. The shell thickness can easily be tailored by changing the length of the alkyl chains of the surfactant [322], while modulation of the Cu-NPs core-size could be achieved only within a very limited size range (diameter <10 nm) by varying the electrochemical parameters.

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