Seedless synthesis of octahedral gold nanoparticles in condensed surfactant phase

Cao, Cuong; Park, Sungho; Sim, Sang Jun

doi:10.1016/j.jcis.2008.03.031

Cited by 35 publications

(27 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When HEPES buffer was added to the CTAB-Au 3+ solution, the color of solution changed from yellow to red, suggesting that the Au 3+ complex was reduced to Au 0 . Compared with ascorbic acid, which is a weak reducer, HEPES is a moderate reducer, and it is very important for the growth of particles with different shapes [36]. Gold decahedral nanostructure, which consists of five equal tetrahedral subunits bound together by five twinned (111) planes and five twinned axes, has been observed ( Fig.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of gold nanoparticles with different morphologies in HEPES buffer

Cheng

et al. 2010

Rare Metals

View full text Add to dashboard Cite

Gold nanoparticles with different morphologies, such as spindle, octahedron, and decahedron were obtained by using different molar ratios of HAuCl 4 /HEPES in the presence and absence of surfactants at room temperature. These nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning electron microcopy (SEM), energy-dispersive X-rays analysis (EDX), and selected area electron diffraction (SAED). The kinetics of the formation of gold nanoparticles in HEPES buffer was studied by UV-visible spectrophotometer. The formation of gold nanoparticles was strongly dependent on the concentration of HEPES and pH value. The surfactants play a crucial role in the size and shape controlled synthesis of gold nanoparticles.

show abstract

Section: Discussionmentioning

confidence: 99%

“…It was very similar with the proposed mechanism of particle growth in Refs. [36][37]. The effect of CTAB concentration on the size and shape of gold nanoparticles has also been investigated.…”

Section: Discussionmentioning

confidence: 99%

Fabrication of gold nanoparticles with different morphologies in HEPES buffer

Cheng

et al. 2010

Rare Metals

View full text Add to dashboard Cite

show abstract

“…7. The peaks could be ascribed to FCC [28]. During crystal growth, low-energy [29] planes are more favorable because of high stability [30].…”

Section: Resultsmentioning

confidence: 97%

Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Razak

Cheong

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Gold nanoparticles (AuNPs) were grown on a Si(100) substrate using a sacrificial hydrothermal method on Al template prepared by direct current (DC) sputtering, followed by thermal annealing. The effect of annealing temperature on the Al template was investigated. The morphology and phases of the grown AuNPs were observed by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. FESEM and XRD results revealed the uniform face-centered cubic structure of AuNPs with isolated 83 nm particle size and 1.48 9 10 13 m -2 area density; these properties were considered optimum for AuNPs formed on the nonannealed sputtered Al template. The electrical properties of AuNPs embedded in polymethylsilsesquioxane (PMSSQ) as an organic dielectric layer were studied using a semiconductor characterization system. A metal-insulatorsemiconductor device with embedded AuNPs was proven to exhibit memory effects. Optimum memory properties of AuNPs embedded in PMSSQ were obtained for AuNPs grown on the non-annealed sputtered Al template with the lowest threshold voltage of 2.4 V in I-V characteristics and 34 electrons stored per AuNP in C-V measurement.

show abstract

“…[7][8][9] It is often reported that the chemical properties of the stabilizers can be enhanced through interaction with the core metallic materials during optical and electrical analysis. [10,11] Since the stabilizers are usually bio-hazardous chemicals that are used to confine core materials' size and shape restriction, they would provoke unexpected side effects. Thus, a great effort has been made to synthesize biologically inert/compatible NPs.…”

Section: Introductionmentioning

confidence: 99%