Wet-chemical templateless assembly of metal nanowires from nanoparticles

Abstract

We describe a new, simple, room-temperature wet-chemical approach for assembling Au and Ag nanoparticles into nanowire networks, without the use of lithographic templates. Five to 35 nm-diameter nanowires passivated with a thin organic layer were synthesized by mechanically agitating a biphasic liquid mixture of an aqueous hydrosol containing the nanoparticles, and toluene. Nanowire structure and surface chemistry are discussed based on electron microscopy, UV-visible spectroscopy and thermogravimetric analyses.

Facile synthesis and size control of Ag nanoparticles by a photochemical reduction at room temperature

“…1(b), after UV exposure of the synthesized solution with sodium citrate for 7 min, the appearance of a surface plasmon peak at ³390 nm indicated the formation of Ag nanoparticles. 12) In addition, according to UV exposure of the Ag colloidal solutions for 7, 15, 30, and 60 min, the values of the wavelength at the maximum absorption ( max ) were 390, 400, 406, and 410 nm, respectively. It is well known that the UVvisible absorption spectrum of Ag nanoparticles depends on their size, i.e., the wavelength at the max increases as the size of Ag nanoparticles increases.…”

Template-free synthesis, characterization, growth mechanism and photoluminescence property of Eu(OH)3 and Eu2O3 nanospindles

“…However, the Eu(OH) 3 nanospindles have spin-like ends. The Eu(OH) 3 nanocrystals can easily fuse to each other by facets and grew as a whole, and then the Eu(OH) 3 nanorods formed [38]. Fig.…”

Modifying the liquid/liquid interface: pores, particles and deposition

“…Another recent communication has described a L/L interface-based transformation of noble metal nanoparticles into nanowire ''networks'', on agitation of the hydrosol with toluene. 83 Similarly, extended silver wire structures have been formed at L/L interfaces, with the ratio of metal precursor to electron donor reported in this case to influence the deposit geometry. 84 Earlier work by Efrima and co-workers described the formation of so-called ''liquid-like'' films of silver by reduction of aqueous silver nitrate solutions in the presence of certain surfactants.…”