Sonochemical Synthesis of Well-Dispersed Gold Nanoparticles at the Ice Temperature

Chia Hao Su, Pei Lin Wu, Chen Sheng Yeh

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

A newly modified sonochemical approach was demonstrated to synthesize stable Au suspensions. The formation of Au nanoparticles with diameters of ∼20 nm was accomplished through the ultrasonic irradiation of aqueous HAuCl 4 solutions containing trisodium citrate at 4 °C. The efficient generation in gold particles only occurred when the sufficient citrate concentrations (1.9, 2.9, and 3.9 mM) were reached. At low citrate concentrations ranging from 0.49 to 1.5 mM, large aggregates of coalesced Au particles were observed as sonication time increased. It is proposed that citrate could transform as the reducing radicals, 1,2,3-tricarboxy-2-propyl radicals, for the AuCl 4 - reduction and might also act as the stabilizer during particles formation.

Original languageEnglish
Pages (from-to)14240-14243
Number of pages4
JournalJournal of Physical Chemistry B
Volume107
Issue number51
Publication statusPublished - 2003 Dec 25

Fingerprint

Sonication
Ice
citrates
Citric Acid
Gold
ice
Ultrasonics
Irradiation
gold
Nanoparticles
nanoparticles
synthesis
Temperature
temperature
Suspensions
ultrasonics
irradiation

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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Sonochemical Synthesis of Well-Dispersed Gold Nanoparticles at the Ice Temperature. / Su, Chia Hao; Wu, Pei Lin; Yeh, Chen Sheng.

In: Journal of Physical Chemistry B, Vol. 107, No. 51, 25.12.2003, p. 14240-14243.

Research output: Contribution to journalArticle

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