Carbon-nanostructures coated/decorated by atomic layer deposition: Growth and applications

Marichy, Catherine; Pinna, Nicola

doi:10.1016/j.ccr.2013.08.007

Cited by 99 publications

(106 citation statements)

References 153 publications

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“…The better performance of these hybrid sensors are also attributed to the effective electron transfer between the metal oxide particles and the highly conductive carbon nanotube network [42][43][44]. CNTs could also be coated with metal oxides of controlled thickness [45]. By combining the non-aqueous sol-gel route with the atomic layer deposition, metal oxides have been grown from the respective metal alkoxide precursors at low temperatures (Figure 5b).…”

Section: Sensing Materialsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

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Abstract:The first fifty years of chemoresistive sensors for gas detection are here reviewed, focusing on the main scientific and technological innovations that have occurred in the field over the course of these years. A look at advances made in fundamental and applied research and leading to the development of actual high performance chemoresistive devices is presented. The approaches devoted to the synthesis of novel semiconducting materials with unprecedented nanostructure and gas-sensing properties have been also presented. Perspectives on new technologies and future applications of chemoresistive gas sensors have also been highlighted.

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Section: Sensing Materialsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

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“…In electrochemical contexts, the electrical conductivity of carbon is beneficial, although this material is poorly functionalized relative to alternative substrates [27]. This deficiency can be overcome through the generation of functional sites by carbon pretreatment.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical hydrogen pumping using a platinum catalyst made in a fluidized bed via atomic layer deposition

Lubers

Drake

Ludlow³

et al. 2016

Powder Technology

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a b s t r a c t a r t i c l e i n f o Available online xxxx Keywords: Platinum Catalysts Hydrogen pumping Fluidized bed Fluidization Atomic layer depositionPlatinum nanoparticle catalysts for electrochemical hydrogen pumping were synthesized on a functionalized powder carbon substrate (XC72R) using atomic layer deposition (ALD) in a fluidized bed reactor (FBR). Trimethyl(methylcyclopentadienyl)platinum(IV) (MeCpPtMe 3 ) was used as the reagent for platinum delivery. Following deposition, MeCpPtMe 3 ligands were combusted or hydrogenated to yield platinum on the XC72R surface. Reactions throughout the ALD cycle were monitored using mass spectrometry and IR spectroscopy to clarify the deposition chemistry. The resultant platinum catalysts were compared to commercial products in hydrogen pumping tests. Hydrogenation made finer, more dispersed, platinum nanoparticles that performed similarly to their commercial equivalent when pumping hydrogen. Conversely, oxygenation made a coarser catalyst that underperformed its commercial equivalent. Thus, altering chemistries shows potential for improving ALD catalyst performance.

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“…HRTEM characterizations together with element mapping on 100 ALD cycles of VO x or ZnO coated MWCNTs show that ALD resulted in a non-uniform coating of VO x or ZnO on the surface of the MWCNTs, which is due to the inhomogeneity of the MWCNTs. 17,18 Fig. 5 (a)-(c) show VO x layers on parts of the MWCNTs, whereas other sections remained uncoated (Fig.…”

Section: V 2 O 5 and Zno Network Of Interconnected Nanoparticlesmentioning

confidence: 99%

Porous nanostructured metal oxides synthesized through atomic layer deposition on a carbonaceous template followed by calcination

et al. 2015

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Porous metal oxides with nano-sized features attracted intensive interest in recent decades due to their high surface area which is essential for many applications, e.g. Li ion batteries, photocatalysts, fuel cells and dye-sensitized solar cells. Various approaches were so far investigated to synthesize porous nanostructured metal oxides, including self-assembly and template-assisted synthesis. For the latter approach, forests of carbon nanotubes are considered as particularly promising templates, with respect to their one dimensional nature and the resulting high surface area. In this work, we systematically investigate the formation of porous metal oxides (Al 2 O 3 , TiO 2 , V 2 O 5 and ZnO) with different morphologies using atomic layer deposition on multi-walled carbon nanotubes followed by post deposition calcination. X-ray diffraction, scanning electron microscopy accompanied with X-ray energy dispersive spectroscopy and transmission electron microscopy were used for the investigation of morphological and structural transitions at the micro-and nano-scale during the calcination process. The crystallization temperature and the surface coverage of the metal oxides and the oxidation temperature of the carbon nanotubes were found to produce significant influence on the final morphology.

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Carbon-nanostructures coated/decorated by atomic layer deposition: Growth and applications

Cited by 99 publications

References 153 publications

First Fifty Years of Chemoresistive Gas Sensors

First Fifty Years of Chemoresistive Gas Sensors

Electrochemical hydrogen pumping using a platinum catalyst made in a fluidized bed via atomic layer deposition

Porous nanostructured metal oxides synthesized through atomic layer deposition on a carbonaceous template followed by calcination

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