Skip to Content
Merck
  • Rational strategy for shaped nanomaterial synthesis in reverse micelle reactors.

Rational strategy for shaped nanomaterial synthesis in reverse micelle reactors.

Nature communications (2014-05-16)
Zengyan Wei, Hiroshi Matsui
ABSTRACT

The shape-controlled synthesis of nanoparticles was established in single-phase solutions by controlling growth directions of crystalline facets on seed nanocrystals kinetically; however, it was difficult to rationally predict and design nanoparticle shapes. Here we introduce a methodology to fabricate nanoparticles in smaller sizes by evolving shapes thermodynamically. This strategy enables a more rational approach to fabricate shaped nanoparticles by etching specific positions of atoms on facets of seed nanocrystals in reverse micelle reactors where the surface energy gradient induces desorption of atoms on specific locations on the seed surfaces. From seeds of 12-nm palladium nanocubes, the shape is evolved to concave nanocubes and finally hollow nanocages in the size ~10 nm by etching the centre of {200} facets. The high surface area-to-volume ratio and the exposure of a large number of palladium atoms on ledge and kink sites of hollow nanocages are advantageous to enhance catalytic activity and recyclability.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Chloroform, anhydrous, contains amylenes as stabilizer, ≥99%
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 0.03 % (v/v) TMS
Supelco
Tetrahydrofuran, HPLC grade, ≥99.9%, inhibitor-free
Sigma-Aldrich
Chloroform-d, 99.8 atom % D, contains 0.03 % (v/v) TMS
Sigma-Aldrich
Chloroform-d, "100%", 99.96 atom % D, contains 0.03 % (v/v) TMS
Sigma-Aldrich
L-Ascorbic acid, ACS reagent, ≥99%
Sigma-Aldrich
Tetrahydrofuran, anhydrous, ≥99.9%, inhibitor-free
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 1 % (v/v) TMS
Sigma-Aldrich
Sodium tetrachloropalladate(II), ≥99.99% trace metals basis
Sigma-Aldrich
Sodium tetrachloropalladate(II), 98%
Sigma-Aldrich
Sodium borohydride solution, 2.0 M in triethylene glycol dimethyl ether
Sigma-Aldrich
Chloroform-d, 99.8 atom % D, contains 1 % (v/v) TMS
Sigma-Aldrich
Chloroform, anhydrous, ≥99%, contains 0.5-1.0% ethanol as stabilizer
Sigma-Aldrich
Chloroform-d, ≥99.8 atom % D, anhydrous
Sigma-Aldrich
Dimethyl sulfoxide-d6, anhydrous, 99.9 atom % D
Sigma-Aldrich
Chloroform-d, "100%", 99.95 atom % D
Sigma-Aldrich
Chloroform-d, 99.8 atom % D, contains 0.05 % (v/v) TMS
Sigma-Aldrich
N,N-Dimethylformamide, anhydrous, 99.8%
Sigma-Aldrich
L-Ascorbic acid, puriss. p.a., ACS reagent, reag. ISO, Ph. Eur., 99.7-100.5% (oxidimetric)
Supelco
Tetrahydrofuran, analytical standard
Supelco
Methanol, analytical standard
Sigma-Aldrich
Sodium hydroxide solution, BioUltra, for molecular biology, 10 M in H2O
Sigma-Aldrich
Sodium hydroxide, BioUltra, for luminescence, ≥98.0% (T), pellets
Supelco
Sodium hydroxide solution, 49-51% in water, eluent for IC
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.9 atom % D
Sigma-Aldrich
Dimethyl sulfoxide-d6, 99.5 atom % D
Sigma-Aldrich
L-Ascorbic acid, 99%
Sigma-Aldrich
L-Ascorbic acid, puriss. p.a., ≥99.0% (RT)
Sigma-Aldrich
L-Ascorbic acid, tested according to Ph. Eur.
Supelco
Tetrahydrofuran, Selectophore, ≥99.5%