High Resolution TEM Studies of Small Gold Particles Prepared by the Reduction of HAuCl4 with Trisodium Citric Acid

Abstract

We found that gold particles, prepared by reduction of HAuCl4 with trisodium citric acid in the solutions of weak acidity, with a diameter of about 17 nm have different ratios between unsmooth surfaces and smooth surfaces. Gold particles with a diameter of about 7 nm have the structure in which amorphous coexist with crystalline. This paper put forward that study on synthesis of the gold particles of partial amorphous structure and growth increase of unsmooth surfaces and growth control of smooth surfaces should be the future developing direction.

Visual Cu2+ Detection of Gold-Nanoparticle Probes and its Employment for Cu2+ Tracing in Circuit System

“…Preparation of LS-AuNPs was performed by mixing 0.5 ml aqueous HAuCl 4 solution (0.02 M) with 0.03 g of citric acid under a magnetic stir for 30 min at 100 °C [19][20][21][22]. The obtained bare AuNPs (1.8 ml) were functionalized by mixing 5×10 -3 M of L-cysteine (1 ml) with 0.2 ml deionized water and then incubated at room temperature for 2 h.…”

Анализ возможности использования нанокластеров Ni, Cu, Au, Pt и Pd для записи информации

“…Из рассмотренных при комнатной температуре ∼ 500 кластеров лишь малая часть обладала совер-шенной формой и структурой. Основными дефектами являлись двойниковые структуры и присутствовавшие в кластере несколько зародышей одной кристаллической модификации, что часто наблюдается эксперименталь-но [16], а также полное (аморфноподобные класте-ры) либо частичное отсутствие различимой структуры (рис. 4).…”

Influence of Citric and Ascorbic Acids on Electrodeposited Au/FeAu Multilayer Nanowires

“…37,[44][45][46][47] In addition to being a complexant, this ligand has been utilized for the chemical synthesis of Au nanoparticles, owing to its reducing properties. 48,49 However, ascorbic acid exhibits a strong reducing character toward noble and transition metals [50][51][52][53][54][55] and rather low complexing stability constants ͑0.2 Ͻ log K Ͻ 2.35͒. 52,[56][57][58] In this study, the electrodeposition conditions for Au-Fe thin films and Au/FeAu multilayer nanowires are compared in both citric and ascorbic acid electrolytes.…”