In situ visualization of self-assembly of charged gold nanoparticles

Yuzi Liu; Xiao Min Lin; Yugang Sun; Tijana Rajh

doi:10.1021/ja312620e

In situ visualization of self-assembly of charged gold nanoparticles

Yuzi Liu, Xiao Min Lin, Yugang Sun, Tijana Rajh

Research output: Contribution to journal › Article › peer-review

172 Scopus citations

Abstract

Self-assembly of Au nanoparticles (NPs) coated with positively charged cetyltrimethylammonium ions (CTA⁺) and negatively charged citrate ions in aqueous liquid cell was investigated by in situ transmission electron microscopy (TEM). Under electron illumination in TEM, the hydrated electrons will reduce the overall positive charges of the CTA⁺ covered Au NPs and decrease the repulsive electrostatic forces among NPs, leading to assembly of individual NPs into one-dimensional structures. On the contrary, the negatively charged Au NPs coated with citrate ions are steady in liquid cell regardless of electron beam intensity.

Original language	English (US)
Pages (from-to)	3764-3767
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	135
Issue number	10
DOIs	https://doi.org/10.1021/ja312620e
State	Published - Mar 13 2013
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja312620e

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abstract = "Self-assembly of Au nanoparticles (NPs) coated with positively charged cetyltrimethylammonium ions (CTA+) and negatively charged citrate ions in aqueous liquid cell was investigated by in situ transmission electron microscopy (TEM). Under electron illumination in TEM, the hydrated electrons will reduce the overall positive charges of the CTA+ covered Au NPs and decrease the repulsive electrostatic forces among NPs, leading to assembly of individual NPs into one-dimensional structures. On the contrary, the negatively charged Au NPs coated with citrate ions are steady in liquid cell regardless of electron beam intensity.",

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N2 - Self-assembly of Au nanoparticles (NPs) coated with positively charged cetyltrimethylammonium ions (CTA+) and negatively charged citrate ions in aqueous liquid cell was investigated by in situ transmission electron microscopy (TEM). Under electron illumination in TEM, the hydrated electrons will reduce the overall positive charges of the CTA+ covered Au NPs and decrease the repulsive electrostatic forces among NPs, leading to assembly of individual NPs into one-dimensional structures. On the contrary, the negatively charged Au NPs coated with citrate ions are steady in liquid cell regardless of electron beam intensity.

AB - Self-assembly of Au nanoparticles (NPs) coated with positively charged cetyltrimethylammonium ions (CTA+) and negatively charged citrate ions in aqueous liquid cell was investigated by in situ transmission electron microscopy (TEM). Under electron illumination in TEM, the hydrated electrons will reduce the overall positive charges of the CTA+ covered Au NPs and decrease the repulsive electrostatic forces among NPs, leading to assembly of individual NPs into one-dimensional structures. On the contrary, the negatively charged Au NPs coated with citrate ions are steady in liquid cell regardless of electron beam intensity.

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In situ visualization of self-assembly of charged gold nanoparticles

Abstract

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