Precursor determined lateral size control of monolayer MoS<sub>2</sub>nanosheets from a series of alkylammonium thiomolybdates: a reversal of trend between growth media

Brent, Jack R.; McNaughter, Paul D.; O’Brien, Paul

doi:10.1039/c7cc01641g

Cited by 5 publications

(5 citation statements)

References 27 publications

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“…Spin coating of molecular precursors onto substrates followed by heating at modest temperatures is a potentially cost effective, scalable and technically straight-forward route to many important functional materials [1][2]. The dimensions and uniformity of the crystallites can be varied by controlling the thickness, processing temperature and composition of the films [3].…”

Section: Introductionmentioning

confidence: 99%

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

et al. 2017

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Thin films of PbS x Se (1-x) (0 ≤ x ≤ 1) have been deposited by spin coating of bis(dodecylxanthato)lead(II) (1) and/or bis (N,N-diethyl-N′-naphthoylselenoureato) lead(II)(2) complexes onto glass substrates followed by heating. The mole fraction of the selenium precursor in the coating mixture was varied from 0 to 1 by mixing the S and Se precursors.The as-prepared thin films were then heated at temperatures ranging from 250 to 400 °C.Powder X-ray diffraction (p-XRD) showed all films were of the halite structure with preferred orientation along (200) plane. The PbS films showed a closely packed network of nanorods, each comprised of smaller nanoparticles. The nanorods were about 500 nm in length and 25 nm in width; the adhered particles had ca. 30 nm sides. The PbSe nanoparticles were also cubic. The alloys showed an intermediate morphology between the rods and cubes depending on the precursor ratio in the coating mixture. The band gaps estimated from Tauc plots for the films heated at 250 °C for 30 minutes were 1.03 and 0.79 eV for PbS and PbSe respectively. The alloyed PbS x Se (1-x) thin films exhibited band gaps between those of PbS and PbSe. The band gaps and lattice parameters of the alloys varied in a Vegardian manner and could be closely correlated to the composition of the precursor mixture.2

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Section: Introductionmentioning

confidence: 99%

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

et al. 2017

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“…Single-source precursors are well established for the production of nanoscale metal chalcogenide thin films and particles due to their ease of synthesis and clean decomposition [30][31][32][33][34][35][36]. In the case of lead(II) sulfide precursors [32], examples of such species include: xanthates [37][38][39][40], dichalcogocarbamates [41][42][43], acylchalcogoureas [42,44], dichalcogenophosphinates [45], dichalcogenophosphates [46] and dichalcogenidoimidophosphinates [47,48].…”

Section: Introductionmentioning

confidence: 99%

The in situ synthesis of PbS nanocrystals from lead(II) n -octylxanthate within a 1,3-diisopropenylbenzene–bisphenol A dimethacrylate sulfur copolymer

et al. 2017

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The synthesis of lead sulfide nanocrystals within a solution processable sulfur ‘inverse vulcanization’ polymer thin film matrix was achieved from the in situ thermal decomposition of lead(II) n-octylxanthate, [Pb(S2COOct)2]. The growth of nanocrystals within polymer thin films from single-source precursors offers a faster route to networks of nanocrystals within polymers when compared with ex situ routes. The ‘inverse vulcanization’ sulfur polymer described herein contains a hybrid linker system which demonstrates high solubility in organic solvents, allowing solution processing of the sulfur-based polymer, ideal for the formation of thin films. The process of nanocrystal synthesis within sulfur films was optimized by observing nanocrystal formation by X-ray photoelectron spectroscopy and X-ray diffraction. Examination of the film morphology by scanning electron microscopy showed that beyond a certain precursor concentration the nanocrystals formed were not only within the film but also on the surface suggesting a loading limit within the polymer. We envisage this material could be used as the basis of a new generation of materials where solution processed sulfur polymers act as an alternative to traditional polymers.

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“…Our previous publications investigating the formation of metal xanthate containing polystyrene films via spin coating were used as a starting point in the design of our metal xanthate containing toner particles. , , A molar ratio of metal xanthate to polymer repeating unit of 6:1 was used for initial attempts, i.e., 0.1 mol of metal xanthate and 1.8 g, and resulted in incomplete printing coverage of the toner mixtures explored. The amount of metal xanthate relative to the polymer was lowered until complete printing coverage was observed when using 0.3 mol of metal xanthate and 1.8 g of polymer.…”

Section: Resultsmentioning

confidence: 99%

Semiconductor Deposition via Laser Printing of a Bespoke Toner Containing Metal Xanthate Complexes

McNaughter,

Moore,

Yeates

et al. 2024

ACS Appl. Eng. Mater.

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A methodology to use laser printing, a form of electrophotography, to print metal chalcogenide complexes on paper, is described. After fusing the toner to paper, a heating step is used to cause the printed metal xanthate complexes to thermolyze within the toner and form three target metal chalcogenides: CuS, SnS, and ZnS. To achieve this, we synthesize a poly(styrene-co-n-butyl acrylate) thermopolymer that emulates the thermal properties of a commercial toner and is also solution processable with the metal xanthate complexes used: [Zn(S 2 COEt) 2 ], [Cu(S 2 COEt)•(PPh 3 ) 2 ], and [Sn(S 2 COEt) 2 ]. We demonstrate through energy dispersive X-ray mapping that the toner is deposited following printing and that thermolysis of the metal xanthate complexes occurs in the fused toner, demonstrating the first example of laser printing of inorganic complexes and, in turn, semiconductors.

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Precursor determined lateral size control of monolayer MoS₂nanosheets from a series of alkylammonium thiomolybdates: a reversal of trend between growth media

Abstract: Lateral size control of MoS2nanosheets using a series of alkylammonium thiomolybdate precursors.

Cited by 5 publications

References 27 publications

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

The in situ synthesis of PbS nanocrystals from lead(II) n -octylxanthate within a 1,3-diisopropenylbenzene–bisphenol A dimethacrylate sulfur copolymer

Semiconductor Deposition via Laser Printing of a Bespoke Toner Containing Metal Xanthate Complexes

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Precursor determined lateral size control of monolayer MoS2nanosheets from a series of alkylammonium thiomolybdates: a reversal of trend between growth media

Abstract: Lateral size control of MoS2nanosheets using a series of alkylammonium thiomolybdate precursors.

Cited by 5 publications

References 27 publications

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

PbS x Se1−x thin films from the thermal decomposition of lead(II) dodecylxanthate and bis(N,N-diethyl-N′-naphthoylselenoureato)lead(II) precursors

The in situ synthesis of PbS nanocrystals from lead(II) n -octylxanthate within a 1,3-diisopropenylbenzene–bisphenol A dimethacrylate sulfur copolymer

Semiconductor Deposition via Laser Printing of a Bespoke Toner Containing Metal Xanthate Complexes

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Precursor determined lateral size control of monolayer MoS₂nanosheets from a series of alkylammonium thiomolybdates: a reversal of trend between growth media