Ultrathin Uniform Platinum Nanowires via a Facile Route Using an Inverse Hexagonal Surfactant Phase Template

Abstract

We present an attractive method for the fabrication of long, straight, highly crystalline, ultrathin platinum nanowires. The fabrication is simply achieved using an inverse hexagonal (H) lyotropic liquid crystal phase of the commercial surfactant phytantriol as a template. A platinum precursor dissolved within the cylindrical aqueous channels of the liquid crystal phase is chemically reduced by galvanic displacement using stainless steel. We demonstrate the production of nanowires using the H phase in the phytantriol/water system which we obtain either by heating to 55 °C or at room temperature by the addition of a hydrophobic liquid, 9- cis-tricosene, to relieve packing frustration. The two sets of conditions produced high aspect nanowires with diameters of 2.5 and 1.7 nm, respectively, at least hundreds of nanometers in length, matching the size of the aqueous channels in which they grow. This versatile approach can be extended to produce highly uniform nanowires from a range of metals.

Control of Pore and Wire Dimensions in Mesoporous Metal Nanowire Networks through Curvature Modulation in Lipid Templates: Implications for Use as Electrodes

“…40 In this case, we used stainless steel. A similar approach has been used with different lyotropic liquid crystal phase templates to produce platinum nanowires 40 and hexagonal symmetry samples with cylindrical pores. 14 The method produced powders that could readily be removed from the steel substrate for SAXS analysis.…”

“…Binary mixtures of phytantriol with different Brij-56% (w/w) of total (weight of phytantriol + weight of Brij-56) were prepared by weighing appropriate amounts of phytantriol and Brij-56 in a capped glass vial followed by the procedure reported in Akbar et al 2018. 40 Ethanolic solutions of pure phytantriol and the binary mixtures of phytantriol/Brij-56 were prepared in 1:1 or 1:2 (w/w) ratios in glass vials for X-ray analysis or chemical deposition on stainless steel, respectively. The glass vials were sealed immediately and solutions were mixed by sonication for not less than 30 min.…”

Designing Nanoporous Coral‐Like Pt Nanowires Architecture for Methanol and Ammonia Oxidation Reactions

“…Previous literatures have reported that there are four types of steady‐state liquid crystal phases of phytantriol in aqueous solution, involving lamellar phase (L α ), [ 30 ] inverse double‐gyroid phase (Q II G ), [ 31 ] inverse double‐diamond cubic phase (Q II D ), [ 32 ] and inverse hexagonal phase (H II ). [ 33 ] Among them, H II phase contains the self‐assembled arrays of straight aqueous channels and have been used as template in the synthesis of metals [ 33 ] and semiconductor [ 34 ] nanowires. In the present work, similar Pt nanowires were also synthesized in the presence of phytantriol.…”

Ultralong Ternary PtRuTe Mesoporous Nanotubes Fabricated by Micelle Assembly with a Self‐Sacrificial Template

“…Various Pt‐based nanomaterials with different morphology have been reported, such as nanoparticles, nanowires (NWs), nanofilms, and nanoflowers; these exhibit excellent performance in electrochemical applications . Benefiting from advantageous physical and chemical characteristics, 1D nanomaterials have attracted widespread attention . The 1D Pt‐based nanomaterials show high efficiency of charge transportation, easy exposure of active sites, and anisotropy of morphology, which are conducive to improving the catalytic performance .…”

“…[32][33][34][35] Benefiting from advantageous physical and chemical characteristics, 1D nanomaterials have attracted widespread attention. [36,37] The 1D Pt-basedn anomaterials show high efficiency of charge transportation, easy exposureo fa ctive sites,a nd anisotropy of morphology,w hich are conducive to improving the catalytic performance. [38][39][40][41][42] Electrodeposition,e lectrospinning,a nd template methodsa re commona pproaches for the preparation of 1D nanomaterials.…”