An ion-selective crown ether covalently grafted onto chemically exfoliated MoS<sub>2</sub> as a biological fluid sensor

Stergiou, Anastasios; Stangel, Christina; Cantón-Vitoria, Rubén; Kitaura, Ryo; Tagmatarchis, Nikos

doi:10.1039/d1nr00404b

Cited by 15 publications

(17 citation statements)

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“…[ 35 ] Such phase transition has been identified either by treating a chemical vapor deposition (CVD)‐grown monolayer with n‐butyllithium [ 39 ] or by liquid exfoliation with n‐butyllithium treatment of bulk TMDs via Li intercalation into the lattice. [ 40 ] In contrast, upon liquid exfoliation via a superacid, such as chlorosulfonic acid, intercalation of MoS 2 and WS 2 , as representative species of the wider family of TMDs, proceeds with retention of the semiconducting phase of the material. [ 41 ] In this case, TMDs act as a weak base due to the presence of the lone electrons of sulfur, which can be protonated by the superacid.…”

Section: Introductionmentioning

confidence: 99%

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Stangel

Nikoli

Tagmatarchis

2022

Adv Energy and Sustain Res

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Transition metal dichalcogenides (TMDs) are materials with the generalized formula MX 2 , where M refers to a transition metal from groups 4-7 of the periodic table and X is a chalcogen atom such as S, Se, or Te. [1] The metal cation is bonded to four chalcogenide anions in a honeycomb lattice. This structure forms a three-atom thick layer, where the metals are sandwiched between the chalcogens. Markedly, the chalcogens do not have high reactivity due to chemical saturation by bonding to the transition metal atoms. These three-atom thick layers are held together with multiple van der Waals forces. [2] However, they can be easily exfoliated by splitting these weak interlayer interactions upon use of a variety of techniques, forming 2D nanosheets with extraordinary physical and chemical properties. In addition, TMDs exist in different lattice structures, which influence the materials' electronic character. Monolayer TMDs have a trigonal prismatic phase (2H phase), that belongs to the D 3h symmetry group and corresponds to a trigonal prismatic coordination for the metal atoms, or an octahedral phase (1T phase), that belongs to the D 3d symmetry group and corresponds to an octahedral coordination of the metal atoms. [3,4] The 1T phase is metastable and tends to convert to the thermodynamically stable 2H phase at room temperature via intralayer atomic gliding. [5] The realization of TMD monolayers leads to the confinement of charge carriers in 2D. Thus, due to quantum confinement effects, the transition from indirect bandgap at bulk TMDs, to direct bandgap at few layers and monolayers, occurs, [6] leading to enhanced photoluminescence. [7] Consequently, this is a straightforward approach for tuning the material's photophysical properties. In addition to the aforementioned strategy for obtaining and manipulating the electronic characteristics of TMDs, tuning the materials' properties can be further achieved through doping methods [8] or heterojunctions creation. [9][10][11] However, due to their atomically thin layers' nature, it becomes impossible to dope TMDs using common techniques that are widely used in semiconductors. [12] In contrast, chemical exfoliation and processing have the advantage of simultaneous modification of the electronic nature of TMDs [13] and in parallel offer the benefit of enhancing dispersibility, allowing surface modification. [14,15] Thus, another way to manipulate the electronic properties of TMDs is by edge or surface functionalization, especially upon incorporation of photoactive molecular species. The latter is a process that has recently emerged for TMDs and considering the advancement already brought in graphene, by the development of numerous functional graphene-based hybrid materials performing in energy conversion schemes under illumination, it certainly deserves further boost. [16][17][18][19] Moreover, among various approaches and

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Section: Introductionmentioning

confidence: 99%

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Stangel

Nikoli

Tagmatarchis

2022

Adv Energy and Sustain Res

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“…Devices based on pristine MoS 2 can interact with electrolytes such as NaCl, modifying the conductivity. 51 In fact, pristine MoS 2 devices start to respond to NaCl at concentrations of 0.23 μg ml −1 in pristine MoS 2 . On the other hand, the addition of antibodies reduces the sensitivity until 2 mg ml −1 (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Field-effect transistor antigen/antibody-TMDs sensors for the detection of COVID-19 samples

et al. 2023

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“…Our approach relies on a simple protocol based on conventional laboratory apparatus, not requiring the use of a dry box. 25 A commercial semiconducting bulk MoS 2 powder was treated with n -butyl lithium under nitrogen, followed by removal of the excess organolithium reagent and tip sonication of the organolithium-intercalated MoS 2 material in distilled water. Accordingly, we managed to produce dispersions with a concentration of exfoliated nanosheets of up to 0.96 mg mL −1 , which are stable for over a month if stored in the absence of light and oxygen.…”

Section: Resultsmentioning

confidence: 99%

A solution-processed MoS₂/graphene heterostructure mediated by a bifunctional block copolymer as a non-noble metal platform for hydrogen evolution

Plantzopoulou

Sideri

Stergiou

et al. 2022

Sustainable Energy Fuels

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An ion-selective crown ether covalently grafted onto chemically exfoliated MoS₂ as a biological fluid sensor

Abstract: We describe the basal plane functionalization of chemically exfoliated molybdenum disulfide (ce-MoS2) nanosheets with a benzo-15-crown-5 ether (B15C5), promoted by the chemistry of diazonium salts en route the fabrication and...

Cited by 15 publications

References 53 publications

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Field-effect transistor antigen/antibody-TMDs sensors for the detection of COVID-19 samples

A solution-processed MoS₂/graphene heterostructure mediated by a bifunctional block copolymer as a non-noble metal platform for hydrogen evolution

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An ion-selective crown ether covalently grafted onto chemically exfoliated MoS2 as a biological fluid sensor

Abstract: We describe the basal plane functionalization of chemically exfoliated molybdenum disulfide (ce-MoS2) nanosheets with a benzo-15-crown-5 ether (B15C5), promoted by the chemistry of diazonium salts en route the fabrication and...

Cited by 15 publications

References 53 publications

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Transition Metal Dichalcogenides Interfacing Photoactive Molecular Components for Managing Energy Conversion Processes

Field-effect transistor antigen/antibody-TMDs sensors for the detection of COVID-19 samples

A solution-processed MoS2/graphene heterostructure mediated by a bifunctional block copolymer as a non-noble metal platform for hydrogen evolution

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An ion-selective crown ether covalently grafted onto chemically exfoliated MoS₂ as a biological fluid sensor

A solution-processed MoS₂/graphene heterostructure mediated by a bifunctional block copolymer as a non-noble metal platform for hydrogen evolution