Materials Science and Engineering/Materials for Biomedical Applications

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Synthesis of Silver Nanocubes[edit]

Synthesis of perfect silver nanocubes by a simple polyol process

Process[edit]

Simple poly(vinyl pyrrolidone)-directed polyol synthesis process.

Parameters[edit]
  • Process Parameters
    • Poly(vinyl pyrrolidone)/AgNO3 ratio R
    • Reaction temperature T
  • Product Parameters
    • Morphology
    • Size
  • Growth Mechanism
    • Thermodynamically Controlled
    • Kinetically Controlled

Product Properties[edit]

  • Ag nanocubes
  • Average edge length of 230 nm
  • Sharp edges and corners
  • Optical Properties
    • Attractive plasma resonance red-shift

Article[edit]

http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=8951&DID=196410&action=detail

Controlled Synthesis of Monodisperse Silver Nanocubes in Water

Process[edit]

In water on the basis of HTAB-modified silver mirror reaction at 120 C (HTAB, n-hexadecyltrimethylammonium bromide)

Parameters[edit]
  • Process Parameters
    • Temperature: 120 C

Product Properties[edit]

  • Monodisperse silver nanocubes
  • Edge length of 55 ± 5 nm
  • Single crystal bonded by six {200} facets
  • Assemble into two-dimensional arrays

Article[edit]

http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/2004/126/i41/abs/ja046037r.html

Shape-Controlled Synthesis of Gold and Silver Nanoparticles

Process[edit]

Reducing silver nitrate with ethylene glycol in the presence of poly(vinyl pyrrolidone) (PVP)

Parameters[edit]

Process Parameters[edit]
  • Molar ratio of PVP and its molar ratio (in terms of repeating unit) relative to silver nitrate
Product Parameters[edit]
  • Geometric shape
  • Size of the product

Product Properties[edit]

  • Single crystals
  • Slightly truncated shape
    • Bounded by {100}, {110}, and {111} facets

Link[edit]

http://www.sciencemag.org/cgi/content/full/298/5601/2176?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=Puntes%2C+V.F.&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT

Synthesis and Galvanic Replacement Reaction of Silver Nanocubes in Organic Medium

Process[edit]

  • Polyol process in which silver nitrate is reduced by ethylene glycol in the presence of a capping agent, poly(vinylpyrrolidone) (PVP)
  • A ligand exchange reaction was used to replace the PVP with another capping agent, allowing the nanocubes to be soluble in chloroform
    • Oleylamine, oleic acid, and decane-thiol were among the ligands investigated

Shape-Controlled Synthesis of Metal Nanostructures: The Case of Silver

Process[edit]

  • Growth mechanisms for silver nanocubes, nanowires, and nanospheres produced through a polymer-mediated polyol process.

Parameters[edit]

Process Parameters[edit]
  • Concentration of AgNO3 (the precursor to silver)
  • Molar ratio between poly(vinylpyrrolidone) (PVP, the capping agent) and AgNO3
  • Strength of chemical interaction between PVP and various crystallographic planes of silver
  • Crystallinity of a seed
  • Extent of the PVP coverage on the seed
Product Parameters[edit]
  • Crystallinity of seeds (e.g., single crystal versus decahedral multiply twinned particles)
  • Morphology of final product

Article[edit]

http://www3.interscience.wiley.com/cgi-bin/abstract/109800818/ABSTRACT

Morphology and size-controlled synthesis of silver nanoparticles in aqueous surfactant polymer solutions

Process[edit]

Poly(methyl vinyl ether) used with precursor AgNO3 solution reduced using NaOH

Product Parameters[edit]

Average length of 29 nm

Article[edit]

http://www.springerlink.com/content/b8280v1807904197/fulltext.pdf

Synthesis of Gold Nanorods[edit]

Hyperthermic effects of gold nanorods on tumor cells

Gold Nanorods: Electrochemical Synthesis and Optical Properties

Wet Chemical Synthesis of High Aspect Ratio Cylindrical Gold Nanorods