Deposition of gold nanoparticles on silica spheres by electroless metal plating technique

Kobayashi, Yoshio; Tadaki, Yohei; Nagao, Daisuke; Konno, Mikio

doi:10.1016/j.jcis.2004.09.002

Cited by 53 publications

(35 citation statements)

References 22 publications

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“…At a magnification of 440 000× (Figure 1c) Figure S2 in the Supporting Information). [23][24][25] An energy dispersive X-ray (EDX) spectrum (see Figure S1 in the Supporting Information) of the body (∼500 nm) of a sea urchin particle shows that it consists of only gold. An EDX spectrum of the spines ( Figure S1) also shows only Au to be present.…”

Section: Characterization Of Bulk Gold Powdermentioning

confidence: 99%

Catalytic Reactions of Carbene Precursors on Bulk Gold Metal

et al. 2009

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Bulk gold metal powder, consisting of particles (5−50 μm) much larger than nanoparticles, catalyzes the coupling of carbenes generated from diazoalkanes (R2C═N2) and 3,3-diphenylcyclopropene (DPCP) to form olefins. It also catalyzes cyclopropanation reactions of these carbene precursors with styrenes. The catalytic activity of the gold powder depends on the nature of the gold particles, as determined by TEM and SEM studies. The reactions can be understood in terms of mechanisms that involve the generation of carbene R2C: intermediates adsorbed on the gold surface. Disciplines Chemistry CommentsReprinted (adapted) Abstract: Bulk gold metal powder, consisting of particles (5-50 µm) much larger than nanoparticles, catalyzes the coupling of carbenes generated from diazoalkanes (R 2 CdN 2 ) and 3,3-diphenylcyclopropene (DPCP) to form olefins. It also catalyzes cyclopropanation reactions of these carbene precursors with styrenes. The catalytic activity of the gold powder depends on the nature of the gold particles, as determined by TEM and SEM studies. The reactions can be understood in terms of mechanisms that involve the generation of carbene R 2 C: intermediates adsorbed on the gold surface.

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Section: Characterization Of Bulk Gold Powdermentioning

confidence: 99%

Catalytic Reactions of Carbene Precursors on Bulk Gold Metal

et al. 2009

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“…Most of the actual deposition techniques lead to the formation of size-dispersed nanoparticles on surfaces. Such particles can be obtained either by direct deposition of preformed clusters [6] or by atomic nucleation and growth mechanisms [7] or even by chemical way. [8] Some studies present gold deposition experiments using vacuum techniques with ion guns, low pressure plasmas, and/or thermal evaporators like chemical vapour deposition (CVD).…”

Section: Introductionmentioning

confidence: 99%

Characterization of gold nanoclusters deposited on HOPG by atmospheric plasma treatment

Demoisson

Raes

Terryn

et al. 2008

Surface & Interface Analysis

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The interest of gold nanoparticles in the field of nanocatalysis and nanosensors is growing. For example, carbon nanotubes covered with gold nanoclusters could present interesting properties in catalysis or/and in devices based on catalytic reaction such as chemical gas sensor. Unfortunately, the characterization of nanoparticles deposited onto a substrate is generally not a trivial exercise. Indeed, in many cases, the amount and size of material deposited is in the range of the sensitivity limits and the spatial resolutions of the techniques used. In that respect, our system, i.e. gold deposited onto a carbon support, is a favourable case, due to the high difference between the atomic numbers of gold and carbon.In this work, gold nanoparticles were deposited onto a HOPG (Highly Oriented Pyrolitic Graphite) substrate using an atmospheric plasma. In this preliminary study, HOPG sample has been used as a model surface that could present the same chemical properties as multiwall carbon nanotubes (MWCNTs).The surface composition was analysed using X-ray photoelectron spectroscopy (XPS). Narrow region electron spectra were used to extract the chemical-state information from the C 1s, O 1s and Au 4f peaks. The Au 4f spectral line shape was also analysed using the QUASES-Tougaard software package in order to obtain the in-depth concentration profile of the resulting nanomaterial. This result evidences a good agreement between experiment and modelling. Indeed, field emission scanning electron microscope (FE-SEM) and atomic force microscopy (AFM) images highlight a homogeneous distribution of 10 nm-size gold clusters with a surface coverage of 12% on the HOPG surface, both in agreement with the results obtained with the Tougaard and coworkers method.

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“…Through altering the bath conditions the deposition rate can vary between a few nanometres to a few hundred microns an hour. The versatility of electro-less deposition has allowed a number of porous substrates to be efficiently plated including polymer surfaces [90][91][92][93] , carbon fibres 94 , metal surfaces and particles 34,95 , carbon nanotube surfaces 96 , glass 97,98 or porous ceramics (silica, alumina, titania) 35,[99][100][101][102] . Gold and metal nanotube membranes have been fabricated through this approach and used for electrode fabrication 103 , molecular separation 100,104 , lithography, 105 and sensing 13,106 .…”

Section: Electroless Depositionmentioning

confidence: 99%

The fabrication and surface functionalization of porous metal frameworks – a review

Dumée

Bao

et al. 2013

J. Mater. Chem. A

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Porous metal frameworks offer potentially useful applications for the aerospace, automotive and bio-medical industries. They can be used as electrodes, actuators, or as selective membrane films. The versatility of the physical features (pore size, pore depth, overall porosity and pore surface coverage) as well as the large range of surface chemistries for both metal oxides and pure noble metals offers scope to functionalise metal nano-particles and networks of nano-porous metal structures. As well as traditional routes to producing metal structures, such as metal sintering or foaming, novel high-throughput techniques have recently been investigated. Nanoparticle self-assembly, metal ion reduction and deposition as well as metal alloy de-alloying were identified as sustainable routes to produce large surface areas of such nano-porous metal frameworks. The main limitations of the current fabrication techniques include the difficulty to process stable and homogeneous arrays of nano-scale pores and the control of their morphology due to the high reactivity of nano-structured metal structures. This paper aims at critically reviewing the various fabrication techniques and surface functionalization routes used to produce advanced functional porous metal frameworks. The limitations and advantages of the different fabrication techniques will be discussed in light of the final material properties and targeted applications. Keywordsporous metal frameworks; porous metal fabrication routes; metal surface chemistry; application of metal frameworks; 3

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Deposition of gold nanoparticles on silica spheres by electroless metal plating technique

Cited by 53 publications

References 22 publications

Catalytic Reactions of Carbene Precursors on Bulk Gold Metal

Catalytic Reactions of Carbene Precursors on Bulk Gold Metal

Characterization of gold nanoclusters deposited on HOPG by atmospheric plasma treatment

The fabrication and surface functionalization of porous metal frameworks – a review

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