Preparation, Phase Transfer, and Self-Assembled Monolayers of Cubic Pt Nanoparticles

Zhao, Shiyong; Chen, Shenhao; Wang, Shuyun; Li, Degang; Ma, Houyi

doi:10.1021/la011262x

Cited by 126 publications

(72 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…acetone (which decreases the surface tension at the interface; Gaponik et al 2002) or a strong acid (Sarathy et al 1997a,b;Zhao et al 2002b) or base (Yang et al 2004) that protonates the negatively charged groups (or deprotonates positively charged amino groups), rendering the particle less charged and thus less oleophobic. For a few weakly binding ligands, also spontaneous transfer without the help of additional agents has been reported (Griffin & Fitzmaurice 2007).…”

Section: (A) Ligand Exchangementioning

confidence: 99%

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Sperling

Parak

2010

Phil. Trans. R. Soc. A.

1,409

1,092

View full text Add to dashboard Cite

Inorganic colloidal nanoparticles are very small, nanoscale objects with inorganic cores that are dispersed in a solvent. Depending on the material they consist of, nanoparticles can possess a number of different properties such as high electron density and strong optical absorption (e.g. metal particles, in particular Au), photoluminescence in the form of fluorescence (semiconductor quantum dots, e.g. CdSe or CdTe) or phosphorescence (doped oxide materials, e.g. Y 2 O 3 ), or magnetic moment (e.g. iron oxide or cobalt nanoparticles). Prerequisite for every possible application is the proper surface functionalization of such nanoparticles, which determines their interaction with the environment. These interactions ultimately affect the colloidal stability of the particles, and may yield to a controlled assembly or to the delivery of nanoparticles to a target, e.g. by appropriate functional molecules on the particle surface. This work aims to review different strategies of surface modification and functionalization of inorganic colloidal nanoparticles with a special focus on the material systems gold and semiconductor nanoparticles, such as CdSe/ZnS. However, the discussed strategies are often of general nature and apply in the same way to nanoparticles of other materials.

show abstract

Section: (A) Ligand Exchangementioning

confidence: 99%

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Sperling

Parak

2010

Phil. Trans. R. Soc. A.

1,409

1,092

View full text Add to dashboard Cite

show abstract

“…[6] Another chemical method of generating faceted Pt nanoparticles is based on the reduction of a Pt IV precursor with sodium borohydride in water at 0 8C, followed by phase transfer of the reduced species to an organic solvent. [7] The mechanism responsible for the formation of these faceted nanoparticles has yet to be elucidated. In a different approach, nanorods and nanotubes of polycrystalline Pt have been fabricated by templating against channels in porous materials, [8] as well as Ag or Se nanowires.…”

mentioning

confidence: 99%

Polyol Synthesis of Platinum Nanostructures: Control of Morphology through the Manipulation of Reduction Kinetics

2005

View full text Add to dashboard Cite

Getting into shape: The shape of Pt0 nanostructures obtained by polyol synthesis can be altered by controlling the rate of reduction of the PtII precursor. Kinetic control is achieved by coupling the reduction with an FeII/FeIII redox reaction and/or by blocking the self‐catalytic sites of the Pt particles with oxygen. The shapes of the nanoparticles (see picture for an example) are different from that of the thermodynamic product.

show abstract

“…A variety of nanoparticle organosol, including Au, Ag, Pt, Y 2 O 3 , CuO, etc., have been prepared by various methods, [22][23][24][25][26][27] such as liquid-liquid phase transfer method, hydrothermal method, 26 microemulsion method, 27 etc. Mayya and Caruso 28 achieved the complete phase transfer of surface-modified gold nanoparticles from the aqueous to the organic phase in the present of primary amines.…”

Section: Introductionmentioning

confidence: 99%

Nano titanium oxide organosol: Synthesis, characterization, and application for electrorheological fluid

Zhao

Wang

Ding

et al. 2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

A liquid-liquid phase transfer method was employed to prepare novel nano titanium oxide/silicone oil organosol. First, titanium oxide nanoparticles were synthesized in aqueous phase and then modified with several surfactants. It is found that only sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulphate (SDS) can cap nanoparticles and then nanoparticles could be transferred into organic phase by the phase transfer method. The transfer process was certified by the rapid change of color for the aqueous and organic phase. Other surfactants including hexadecyltrimethyl ammonium bromide (CTAB) and oleic acid were unable to ensure the phase transfer in the organic phase. The procedure was also verified by high-resolution transmission electron microscopy (HRTEM), particle size analyzer, UV-vis, etc. The results also showed the narrow size distribution of the nanoparticles. The mechanism of phase transfer is also discussed for different surfactant. Because of its good antisedimentation and high electrorheological effect, organosol is a novel path for the design and application of electrorheological fluid.

show abstract

Preparation, Phase Transfer, and Self-Assembled Monolayers of Cubic Pt Nanoparticles

Cited by 126 publications

References 18 publications

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Polyol Synthesis of Platinum Nanostructures: Control of Morphology through the Manipulation of Reduction Kinetics

Nano titanium oxide organosol: Synthesis, characterization, and application for electrorheological fluid

Contact Info

Product

Resources

About