Deposition of iron sulfide nanocrystals from single source precursors

Akhtar, Javeed; Akhter, Javeed; Malik, Mohammad Azad; O’Brien, Paul; Tuna, Floriana; Raftery, James; Helliwell, Madeleine

doi:10.1039/c1jm10703h

Cited by 87 publications

(91 citation statements)

References 28 publications

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“…The symmetrical tris(dialkyldithiocarbamato)iron(III) with the shorter alkyl groups (4) gave the pure pyrrhotite phase at higher growth temperatures (400, 450 1C). The same precursor produced pure greigite phase nanocrystals from the thermolysis in oleylamine [43]. The pyrite phase is dominant in all samples deposited from the unsymmetrical complexes, whereas the pyrrhotite phase is dominant in samples deposited from symmetrical complexes.…”

Section: Resultsmentioning

confidence: 92%

“…tris(dialkyldithiocarbamato)iron(III) compounds (1-4) were prepared as described previously by us [43][44][45].…”

Section: Precursor Synthesismentioning

confidence: 99%

“…Puthussery et al [42] prepared colloidal pyrite NCs by injecting a solution of sulfur dissolved in diphenyl ether into a solution of FeCl 2 in octadecylamine at 220 1C and stirring for several hours. Most recently we prepared the iron sulfide nanocrystals with greigite and pyrrhotite phases from thermolysis of tris(dialkyldithiocarbamato)iron(III) in oleylamine, hexadecylamine and octadecene [43].…”

Section: Introductionmentioning

confidence: 99%

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Deposition of iron sulfide thin films by AACVD from single source precursors

Akhtar

Abdelhady

Malik

et al. 2012

Journal of Crystal Growth

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Section: Resultsmentioning

confidence: 92%

“…tris(dialkyldithiocarbamato)iron(III) compounds (1-4) were prepared as described previously by us [43][44][45].…”

Section: Precursor Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deposition of iron sulfide thin films by AACVD from single source precursors

Akhtar

Abdelhady

Malik

et al. 2012

Journal of Crystal Growth

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“…[32][33][34][35][36][37][38][39][40] Iron sulfides are suggested catalysts in the iron-sulfur hypothesis for the origin of life. Pioneering research into evolutionary biochemistry by Wächtershäuser and others has suggested that many of the prebiotic chemical reactions might be catalysed by iron sulfide (mackinawite, greigite, pyrite and violarite) surfaces at hydrothermal vents on the ocean floor during the Hadean and early Archean eras.…”

Section: Introductionmentioning

confidence: 99%

The surface chemistry of NO_x on mackinawite (FeS) surfaces: a DFT-D2 study

Dzade

Roldan

Leeuw

2014

Phys. Chem. Chem. Phys.

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We present density functional theory calculations with a correction for the long-range interactions (DFT-D2) of the bulk and surfaces of mackinawite (FeS), and subsequent adsorption and dissociation of NO x gases (nitrogen monoxide (NO) and nitrogen dioxide (NO 2 )). Our results show that these environmentally important molecules interact very weakly with the energetically most stable (001) surface, but adsorb relatively strongly onto the FeS (011), (100) and (111) surfaces, preferentially at Fe sites via charge donation from these surface species. The NO x species exhibit a variety of adsorption geometries, with the most favourable for NO being the monodentate Fe-NO configuration, whereas NO 2 is calculated to form a bidentate Fe-NOO-Fe configuration. From our calculated thermochemical energy and activation energy barriers for the direct dissociation of NO and NO 2 on the FeS surfaces, we show that NO prefers molecular adsorption, while dissociative adsorption, i.e. NO 2 (ads) -[NO(ads) + O(ads)] is preferred over molecular adsorption for NO 2 onto the mackinawite surfaces. However, the calculated high activation barriers for the further dissociation of the second N-O bond to produce either [N(ads) and 2O(ads)] or [N(ads) and O 2 (ads)] suggest that complete dissociation of NO 2 is unlikely to occur on the mackinawite surfaces.

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“…[21][22][23] Solar cells employing copper sulfide and silicon nanocrystals have already been reported. 24,25 For iron sulfide, the large number of crystal phases 20,26,27 has complicated the synthesis of phase-pure colloidal nanomaterials. So far, phase-pure iron disulfide nanocrystals, with only few exceptions, 23,[28][29][30] have been prepared with hydrothermal methods.…”

Section: Introductionmentioning

confidence: 99%

Pyrite nanocrystals: shape-controlled synthesis and tunable optical properties via reversible self-assembly

Döblinger

Vaneski

et al. 2011

J. Mater. Chem.

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Nanocrystals from non-toxic, earth abundant materials have recently received great interest for their potential large-scale application in photovoltaics and photocatalysis. Here, we report for the first time on the shape-controlled and scalable synthesis of phase-pure pyrite (FeS 2 ) nanocrystals employing the simple, inexpensive, thermal reaction of iron-oleylamine complexes with sulfur in oleylamine. Either dendritic nanocrystals (nanodendrites) or nanocubes are obtained by adjusting the iron-oleylamine concentration and thereby controlling the nucleus concentration and kinetics of the nanocrystal growth. Pyrite nanodendrites are reversibly assembled by washing with toluene and redispersed by adding the ligand oleylamine. The assembly-redispersion-process is accompanied by an increased absorption in the red/near-infrared spectral region for the aggregated state. This increased low-energy absorption is due to interactions between the closed-packed nanocrystals. High-concentration nanodendrite dispersions are used to prepare pyrite thin films with strong broadband extinction in the visible and near-infrared. These films are attractive candidates for light harvesting in all inorganic solar cells based on earth abundant, non-toxic materials as well as for photocatalytic applications.

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Deposition of iron sulfide nanocrystals from single source precursors

Cited by 87 publications

References 28 publications

Deposition of iron sulfide thin films by AACVD from single source precursors

Deposition of iron sulfide thin films by AACVD from single source precursors

The surface chemistry of NO_x on mackinawite (FeS) surfaces: a DFT-D2 study

Pyrite nanocrystals: shape-controlled synthesis and tunable optical properties via reversible self-assembly

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Deposition of iron sulfide nanocrystals from single source precursors

Cited by 87 publications

References 28 publications

Deposition of iron sulfide thin films by AACVD from single source precursors

Deposition of iron sulfide thin films by AACVD from single source precursors

The surface chemistry of NOx on mackinawite (FeS) surfaces: a DFT-D2 study

Pyrite nanocrystals: shape-controlled synthesis and tunable optical properties via reversible self-assembly

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The surface chemistry of NO_x on mackinawite (FeS) surfaces: a DFT-D2 study