Group 11 Amidinates and Guanidinates: Potential Precursors for Vapour Deposition

Whitehorne, Todd J. J.; Coyle, Jason P.; Mahmood, Ahsan; Monillas, Wesley H.; Yap, Glenn P. A.; Barry, Seán T.

doi:10.1002/ejic.201100262

Cited by 54 publications

(72 citation statements)

References 11 publications

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“…This reduction is reasonable considering the amidinate ligand: both copper and gold have previously been shown to be deposited as metallic films using amidinate precursors. In the case of copper, the reduction involved loss of the alkyl group by oxidation and fragmentation .…”

Section: Resultsmentioning

confidence: 60%

Self-seeding gallium oxide nanowire growth by pulsed chemical vapor deposition

Pallister

Buttera

Barry

2015

Phys. Status Solidi A

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A new heteroleptic gallium (III) alkyl amidinate [monoacetamidinatodiethylgallium(III), compound 1] was found to undergo self‐seeding pulsed chemical vapor deposition (p‐CVD) to gallium metal above temperatures of 450 °C. Below this temperature, the mono‐layer formed on the surface of silica and alumina is unreactive to itself and H2O and O2 co‐reactants. With no co‐reactant above 450 °C gallium metal spheres (150–500 nm) was formed in a p‐CVD experiment. With the addition of short H2O pulses produced interesting morphologies and gallium metal/gallium oxide structures resembling “ice cream cones” of varying sizes (<150–500 nm). The addition of O2 produced micron long nanowires <250 nm in width and a mat of nanoparticles on both silicon and alumina. Scanning electron micrograph of pulsed chemical vapor deposition of 1 with H2O as a co‐reactant at 500 °C.

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Section: Resultsmentioning

confidence: 60%

Self-seeding gallium oxide nanowire growth by pulsed chemical vapor deposition

Pallister

Buttera

Barry

2015

Phys. Status Solidi A

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“…[10] Considering the significantly lower reaction temperatures in our experiments, the decomposition of 1 a is expected to proceed by a different reaction pathway, most likely by an intramolecular hydrogen migration (see the Supporting Information).…”

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confidence: 98%

Synthesis, Structure, Tautomerism, and Reactivity of Methanetrisamidines

et al. 2012

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“…The gold-containing guanidinate and iminopyrrolidinate CVD precursors, (1)[Au(N i Pr)2CN(Me)2]2 and (2) [Au(Me2-t Bu-ip)]2, respectively, were synthesized according to protocols reported elsewhere. 8,9 The TFBG is fed through a groove that was milled and epoxied into a KF-25 flange cap and sits directly above the single-source precursor boat in the case of (1) and in a separately heated bubbler in the case of (2). In all cases, the precursor is typically loaded into a bubbler within a drybox under N 2 atmosphere for safe transfer to the CVD apparatus prior to each experiment.…”

Section: Introductionmentioning

confidence: 99%

Chemical vapor deposition of anisotropic ultrathin gold films on optical fibers: real-time sensing by tilted fiber Bragg gratings and use of a dielectric pre-coating

Mandia

Zhou²,

Ward

et al. 2014

SPIE Proceedings

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Tilted fiber Bragg gratings (TFBGs) are refractometry-based sensor platforms that have been employed herein as devices for the real-time monitoring of chemical vapour deposition (CVD) in the near-infrared range (NIR). The coreguided light launched within the TFBG core is back-reflected off a gold mirror sputtered onto the fiber-end and is scattered out into the cladding where it can interact with a nucleating thin film. Evanescent fields of the growing gold nanostructures behave differently depending on the polarization state of the core-guided light interrogating the growing film, therefore the resulting spectral profile is typically decomposed into two separate peak families for the orthogonal S-and P-polarizations. Wavelength shifts and attenuation profiles generated from gold films in the thickness regime of 5-100 nm are typically degenerate for deposition directly onto the TFBG. However, a polarization-dependence can be imposed by adding a thin dielectric pre-coating onto the TFBG prior to using the device for CVD monitoring of the ultrathin gold films. It is found that addition of the pre-coating enhances the sensitivity of the P-polarized peak family to the deposition of ultrathin gold films and renders the films optically anisotropic. It is shown herein that addition of the metal oxide coating can increase the peak-to-peak wavelength separation between orthogonal polarization modes as well as allow for easy resonance tracking during deposition. This is also the first reporting of anisotropic gold films generated from this particular gold precursor and CVD process. Using an ensemble of x-ray techniques, the local fine structure of the gold films deposited directly on the TFBG is compared to gold films of similar thicknesses deposited on the Al2O3 pre-coated TFBG and witness slides.

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Group 11 Amidinates and Guanidinates: Potential Precursors for Vapour Deposition

Cited by 54 publications

References 11 publications

Self-seeding gallium oxide nanowire growth by pulsed chemical vapor deposition

Self-seeding gallium oxide nanowire growth by pulsed chemical vapor deposition

Synthesis, Structure, Tautomerism, and Reactivity of Methanetrisamidines

Chemical vapor deposition of anisotropic ultrathin gold films on optical fibers: real-time sensing by tilted fiber Bragg gratings and use of a dielectric pre-coating

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