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A novel, rapid, seedless, in situ synthesis method of shape and size controllable gold nanoparticles using phosphates
- Source :
- Scientific Reports, Vol 9, Iss 1, Pp 1-13 (2019), Scientific Reports, Articles
- Publication Year :
- 2019
- Publisher :
- Nature Publishing Group, 2019.
-
Abstract
- We hereby report a novel synthesis method of size and shape controllable gold nanoparticles that is rapid, in situ and seedless. Unlike most currently employed size and shape controllable synthesis methods, it takes place in a single step under room temperature within ~15 minutes. While mixtures of gold nanospheres around 70 nm and gold nanoplates with width ranging from 100 nm to 1000 nm can be synthesized in about 15 minutes by standard synthesis method using N-2-hydroxyethylpiperazine-N-2-ethanesulphonic acid (HEPES) to reduce Au(III), gold nanoflowers or mixtures of smaller gold nanospheres and nanoplates can be synthesized with the addition of disodium phosphate (Na2HPO4) or monosodium phosphate (NaH2PO4), respectively. Increasing the concentration of phosphate added significantly reduces the formation time of gold nanoparticles to seconds. By increasing the molar ratio of Na2HPO4: HEPES and NaH2PO4: HEPES, the size of gold nanoflowers and gold nanoparticle mixtures can be tuned from ~60 nm down to 1 nm and from ~70 nm to ~2.5 nm, respectively. The systematic structural changes are accompanied by similarly systematic colour changes associated with shifting of the surface plasmon resonance. The proposed mechanism of the synthesis process is also presented.
- Subjects :
- 0301 basic medicine
In situ
Materials science
Monosodium phosphate
Nanoparticle
gold nano particles
lcsh:Medicine
Disodium phosphate
Article
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
monosodium phosphate
Surface plasmon resonance
lcsh:Science
Molecular self-assembly
HEPES
Multidisciplinary
Structural properties
disodium phosphate
Synthesis and processing
lcsh:R
Phosphate
030104 developmental biology
chemistry
Chemical engineering
Colloidal gold
Nanoparticles
lcsh:Q
030217 neurology & neurosurgery
surface plasmon resonance
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 9
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....01621268e7abdfaa665c145002796727