Shape-controlled synthesis of gold icosahedra and nanoplates using Pluronic P123 block copolymer and sodium chloride

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.09.020· OSTI ID:21372416

Lee, Won-Ki; Cha, Sang-Ho; Kim, Ki-Hyun ^[1]; Kim, Byung-Woo ^[2]; Lee, Jong-Chan ^[1]

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1. Department of Chemical and Biological Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-744 (Korea, Republic of)
2. Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)

Gold icosahedra with an average diameter of about 600 nm were easily prepared by heating an aqueous solution of the amphiphilic block copolymer, poly(ethylene oxide){sub 20}-poly(propylene oxide){sub 70}-poly(ethylene oxide){sub 20} (Pluronic P123), and hydrogen tetrachloroaurate(III) trihydrate (HAuCl{sub 4}.3H{sub 2}O) at 60 deg. C for 25 min. When sodium chloride (NaCl:HAuCl{sub 4} molar ratio=10:1) was added to this aqueous solution, gold nanoplates were produced. The chloride ion was found to be a key component in the formation of the gold nanoplates by facilitating the growth of {l_brace}111{r_brace} oriented hexagonal/triangular gold nanoplates, because similar gold nanoplates were produced when LiCl or KCl was added to the aqueous solution instead of NaCl, while gold nanocrystals having irregular shapes were produced when NaBr or NaI was added. - Graphical abstract: Gold icosahedra were prepared by heating an aqueous solution of Pluronic P123 and HAuCl{sub 4}. When NaCl was added to this solution, gold nanoplates were produced.

• OSTI ID: 21372416
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 12; Other Information: DOI: 10.1016/j.jssc.2009.09.020; PII: S0022-4596(09)00455-1; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
AQUEOUS SOLUTIONS
COPOLYMERS
GOLD
GOLD COMPLEXES
HEATING
LITHIUM CHLORIDES
NANOSTRUCTURES
POTASSIUM CHLORIDES
SODIUM BROMIDES
SODIUM CHLORIDES
SODIUM IODIDES
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
DISPERSIONS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HOMOGENEOUS MIXTURES
INORGANIC PHOSPHORS
IODIDES
IODINE COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM HALIDES
METALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHOSPHORS
POLYMERS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
SOLUTIONS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS