Nanoscopic Pt Colloids in the “Embryonic State”

Angermund, Klaus; Bühl, Michæl; Dinjus, E.; Endruschat, Uwe; Gaßner, Franz; Haubold, H.‐G.; Hormes, J.; Köhl, G.; Mauschick, Frank T.; Modrow, Hartwig; Mörtel, Reinhard; Mynott, Richard; Tesche, B.; Vad, Thomas; Waldöfner, Norbert; Bönnemann, Helmut

doi:10.1002/1521-3773(20021104)41:21<4041::aid-anie4041>3.0.co;2-3

Cited by 39 publications

(23 citation statements)

References 9 publications

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“…The work of Bönnemann et al on the preparation of Pt nanoclusters offers another idea of what might happen during nucleation [90][91][92][93]. In the reaction of Pt(acac) 2 (acac = acetoacetanoate) with Al(CH 3 ) 3 , an intermediate was proposed consisting of two tetramethylplatinum species bridged by two methylaluminum species, Scheme 7 [94].…”

Section: Bönnemann's Pt Nanocluster Intermediate Studiesmentioning

confidence: 99%

Nanocluster nucleation and growth kinetic and mechanistic studies: A review emphasizing transition-metal nanoclusters

Finney

Finke

2008

Journal of Colloid and Interface Science

346

410

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Section: Bönnemann's Pt Nanocluster Intermediate Studiesmentioning

confidence: 99%

Nanocluster nucleation and growth kinetic and mechanistic studies: A review emphasizing transition-metal nanoclusters

Finney

Finke

2008

Journal of Colloid and Interface Science

346

410

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“…Hence the size and shape control of nanoparticles often remained somehow "alchemistical". Therefore, a great deal of attention has been focused on understanding the process of nanoparticle formation [4][5][6][7]. When such phenomena are fundamentally understood, it becomes possible to tune the size and shape of nanoparticles and consequently improve their performance.…”

Section: Introductionmentioning

confidence: 99%

New insights of the nucleation and growth process of gold nanoparticles via in situ coupling of SAXS and XANES

Polte

Kraehnert

Radtke

et al. 2010

J. Phys.: Conf. Ser.

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“…The first is the reduction of a Pt salt by a borohydride or organoaluminum reagent. 7 The second is referred to as the "polyol' method, where Pt(acac) 2 is reduced by an alkanediol with heating. 8 Both methods reliably yield 2-3 nm particles with modestly narrowed dispersities (± 40% and 25%, respectively).…”

Section: Resultsmentioning

confidence: 99%

LDRD final report on "controlled synthesis of nanocrystalline catalysts <U+2013> from solutions to supports".

Buhro

Richards

Lattman³

et al. 2006

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Control of nanoparticle size is crucial to the development of nanotechnology. At this point in time, no general, rational synthetic strategy for controlling nanocrystal diameters and producing narrow diameter distributions has emerged. This is a reflection of a poor understanding of the mechanisms for nanocrystal growth. Based on previous studies of bismuth and gold nanoparticle growth, this work clearly establishes two new synthetic approaches to controlled growth of colloidal Pt nanocrystals, both based on aggregative-growth mechanisms, which afford narrow size distributions and size control over a wide and relevant size regime. The first new method is a phase transfer process, where growth is controlled by varying ligand stabilizer concentrations. The second method involves rapid reduction of a molecular platinum precursor in the presence of a polymer stabilizer.At present the size control is empirical, and incompletely understood and incompletely developed. However, the new synthetic pathways are amenable to kinetic study and analysis, establishing that a quantitative, rational control of sizes and size distributions can be achieved.

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Nanoscopic Pt Colloids in the “Embryonic State”

Cited by 39 publications

References 9 publications

Nanocluster nucleation and growth kinetic and mechanistic studies: A review emphasizing transition-metal nanoclusters

Nanocluster nucleation and growth kinetic and mechanistic studies: A review emphasizing transition-metal nanoclusters

New insights of the nucleation and growth process of gold nanoparticles via in situ coupling of SAXS and XANES

LDRD final report on "controlled synthesis of nanocrystalline catalysts <U+2013> from solutions to supports".

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