Molecularly-induced roughness and oxidation in cobalt/organodithiol/cobalt nanolayers synthesized by sputter-deposition and molecular sublimation

Rowe, Collin; Kumar Shanmugham, Sathish; Greczynski, Grzegorz; Hultman, Lars; le Febvrier, Arnaud; Eklund, Per; Ramanath, Ganpati

doi:10.1039/d3dt01910a

Cited by 2 publications

(3 citation statements)

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“…Metal-oxide-based hybrid thin film multilayers have been fabricated by sequential atomic layer deposition (ALD) and molecular layer deposition (MLD). Such nanolaminates exhibit unusual property combinations different from that of the constituent materials, e.g., high electrical and low thermal conductivities, , and mechanical flexibility. , However, very little is known about the effects of the MNL structure and chemistry on the nano/micro-scale structure, morphology, and phase stability of inorganic nanolayers, as well as the inorganic/MNL interfaces …”

Section: Introductionmentioning

confidence: 99%

“…16,17 However, very little is known about the effects of the MNL structure and chemistry on the nano/micro-scale structure, morphology, and phase stability of inorganic nanolayers, as well as the inorganic/ MNL interfaces. 18 Here, we report the synthesis of titania/organophosphate-MNL multilayers (see Scheme in Figure 1) and describe MNLinduced decreases in the titania nanolayer growth rate, suppression of anatase nanocrystal formation, and increases in surface roughness. We show that these phenomena are related to the MNL structure, bonding chemistry, and impurity incorporation during titania growth.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanomolecularly-induced Effects at Titania/Organo-Diphosphonate Interfaces for Stable Hybrid Multilayers with Emergent Properties

Rowe,

Kashyap,

Sharma

et al. 2024

ACS Appl. Nano Mater.

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Nanoscale hybrid inorganic−organic multilayers are attractive for accessing emergent phenomena and properties through superposition of nanomolecularly-induced interface effects for diverse applications. Here, we demonstrate the effects of interfacial molecular nanolayers (MNLs) of organo-diphosphonates on the growth and stability of titania nanolayers during the synthesis of titania/MNL multilayers by sequential atomic layer deposition and single-cycle molecular layer deposition. Interfacial organo-diphosphonate MNLs result in ∼20−40% slower growth of amorphous titania nanolayers and inhibit anatase nanocrystal formation from them when compared to amorphous titania grown without MNLs. Both these effects are more pronounced in multilayers with aliphatic backbone-MNLs and likely related to impurity incorporation and incomplete reduction of the titania precursor indicated by our spectroscopic analyses. In contrast, both MNLs result in two-fold higher titania nanolayer roughness, suggesting that roughening is primarily due to MNL bonding chemistry. Such MNL-induced effects on inorganic nanolayer growth rate, roughening, and stability are germane to realizing high-interfacefraction hybrid nanolaminate multilayers.

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