Metal Clusters and Colloids

Schmid, Günter; Lifeng, F.

doi:10.1002/(sici)1521-4095(199805)10:7<515::aid-adma515>3.0.co;2-y

Cited by 306 publications

(31 citation statements)

References 35 publications

(53 reference statements)

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“…Nano-structured noble metal thin films are of great scientific and technological importance (Bauer et al, 2003;de Heer et al1987;Ditlbacher et al, 2000;Schmid & Chi, 1998;Jin et al, 2001;Maier et al, 2001). They play a major role in biotechnology, e.g.…”

Section: Introductionmentioning

confidence: 99%

Structural changes in gradient colloidal thin gold films deposited from aqueous solution

Roth¹,

Müller‐Buschbaum

Timmann³

et al. 2007

J Appl Cryst

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Pattern formation is investigated in a one-dimensional gradient prepared from an aqueous colloidal gold nanoparticle solution. The hydrodynamic process can be reconstructed by determining the prominent length scales and surface roughness in the dried gradient. The structural information is obtained using a combination of grazing-incidence small-angle X-ray scattering, which is a method of high-statistical relevance, and a moderate microfocused beam. This allows for scanning the gradient and to locally reveal the structure of the thin film. Our results, based on a simplified hydrodynamic model, indicate a system oscillating between depleted regions, nanoparticle domains and complete nanoparticle layers.

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Section: Introductionmentioning

confidence: 99%

Structural changes in gradient colloidal thin gold films deposited from aqueous solution

Roth¹,

Müller‐Buschbaum

Timmann³

et al. 2007

J Appl Cryst

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“…Since methods were first developed to encapsulate nanocrystals with a monolayer of protective surfactant (1,2 ), nanocrystals have been assembled as active components inside plastic electronics (3,4,5), and they have been assembled into dimers, trimers (6), and crystals of nanocrystals (7,8). In each case the nanocrystals are treated as a conventional polymer or biological macromolecule from the assembly point of view.…”

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confidence: 99%

Semiconductor Nanorod Liquid Crystals

et al. 2002

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“…INTRODUCTION N ANOSCALE and nanoparticle materials are expected to exhibit unusual chemical and physical properties different from those of either the bulk materials or single atoms [1], [2]. Properties such as ferro-or ferri-magnetism as well as superconductivity are not intrinsic to a molecule or an ion but arise from a cooperative solid-state (bulk) behavior.…”

mentioning

confidence: 99%

Synthesis, structural order and magnetic behavior of self-assembled έ-Co nanocrystal arrays

Puntes

Krishnan

2001

IEEE Trans. Magn.

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Abstract-The synthesis of magnetic nanoparticles with monodispere size distributions, their self assembly into ordered arrays and their magnetic behavior as a function of structural order (ferrofluids and 2D assemblies) are presented. Magnetic colloids of monodispersed, passivated, cobalt nanocrystals were produced by the rapid pyrolysis of cobalt carbonyl in solution. The size, size distribution (std. dev. 5%) and the shape of the nanocrystals were controlled by varying the surfactant, its concentration, the reaction rate and the reaction temperature. The Co particles are defect-free single crystals with a complex cubic structure related to the beta phase of manganese ( -Co). In the 2D assembly, a collective behavior was observed in the low-field susceptibility measurements where the magnetization of the zero field cooled process increases steadily and the magnetization of the field cooling process is independent the temperature. This was different from the observed behavior in a sample comprised of disordered interacting particles. A strong paramagnetic contribution appears at very low temperatures where the magnetization increases drastically after field cooling the sample. This has been attributed to the Co surfactant-particle interface since no magnetic atomic impurities are present in these samples.Index Terms-Chemical synthesis of ferrofluids, Co nanocrystals, finite size effects, self assembly.

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Metal Clusters and Colloids

Cited by 306 publications

References 35 publications

Structural changes in gradient colloidal thin gold films deposited from aqueous solution

Structural changes in gradient colloidal thin gold films deposited from aqueous solution

Semiconductor Nanorod Liquid Crystals

Synthesis, structural order and magnetic behavior of self-assembled έ-Co nanocrystal arrays

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