Gold nanoparticles on MoS 2 layered crystal flakes

Cao, Wei; Pankratov, V.; Huttula, Marko; Shi, Xinying; Saukko, Sami; Huang, Zujian; Zhang, Meng

doi:10.1016/j.matchemphys.2015.03.041

Cited by 37 publications

(23 citation statements)

References 42 publications

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“…It is worth noting that, each Au particle comprises of several Au crystals. The mean single‐crystal size of Au is estimated as 16 nm from X‐ray diffraction (XRD) pattern (Figure S1, Supporting Information), calculated by the Scherrer equation, consistent with our previous study . Energy dispersive X‐ray spectroscopy (EDS) mapping (Figure e) and a line‐scan (Figure S2, Supporting Information) clearly show the distribution of Mo, Au, and Ni elements.…”

Section: Resultssupporting

confidence: 87%

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Metallic Contact between MoS₂ and Ni via Au Nanoglue

Shi

Posysaev

Huttula

et al. 2018

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A critical factor for electronics based on inorganic layered crystals stems from the electrical contact mode between the semiconducting crystals and the metal counterparts in the electric circuit. Here, a materials tailoring strategy via nanocomposite decoration is carried out to reach metallic contact between MoS matrix and transition metal nanoparticles. Nickel nanoparticles (NiNPs) are successfully joined to the sides of a layered MoS crystal through gold nanobuffers, forming semiconducting and magnetic NiNPs@MoS complexes. The intrinsic semiconducting property of MoS remains unchanged, and it can be lowered to only few layers. Chemical bonding of the Ni to the MoS host is verified by synchrotron radiation based photoemission electron microscopy, and further proved by first-principles calculations. Following the system's band alignment, new electron migration channels between metal and the semiconducting side contribute to the metallic contact mechanism, while semiconductor-metal heterojunctions enhance the photocatalytic ability.

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Section: Resultssupporting

confidence: 87%

“…This can be confirmed through X‐ray photoelectron spectroscopy (XPS) in Figure S3 of the Supporting Information. On the MoS 2 site, the chemically active edges promote the reduction of Au 3+ in solution to neutral Au agglomerations . During this process, Mo and S are also partially oxidized.…”

Section: Resultsmentioning

confidence: 99%

Metallic Contact between MoS₂ and Ni via Au Nanoglue

Shi

Posysaev

Huttula

et al. 2018

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“…Relaxing dynamics and time scales for the different relaxation processes were also elucidated [14], while studies of the excitons were further extended to other low dimensional metal dichalcogenides [20]. Extensive studies through this PL technique further revealed that indirect band transitions were plasmonic enhanced in nanoparticles [21], and also Au nanoparticle decorated flakes [22].…”

Section: Introductionmentioning

confidence: 97%

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS₂

Pankratov

Hoszowska

Dousse

et al. 2015

J. Phys.: Condens. Matter

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We report on vacuum ultraviolet (VUV) excited photoluminescence (PL) spectra emitted from a chemical vapor deposited MoS 2 few-layered film. The excitation spectrum was recorded by monitoring intensities of PL spectra at ~1.9 eV. A strong wide excitation band peaking at 7 eV was found in the excitation. The PL excitation band is most intensive at liquid helium temperature and completely quenched at 100 K. Through first-principles calculations of photoabsorption in MoS 2 , the excitation was explicated and attributed to transitions of electrons from p-and d-type states in the valence band to the d-and p-type states in the conduction band. The obtained photon-in/photon-out results clarify the excitation and emission behavior of the low dimensional MoS 2 when interacting with the VUV light sources.

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“…Besides, the morphology and distribution of LDNs have impact on the system performance. 86,87 For instance, Wang et al prepared various morphologies of spherical, triangle, clover-like and ower-like AuNPs (Fig. 4) by changing the ratio of MoS 2 and thionine (Thi), and demonstrated the clover-like Au NP/ThiMoS 2 nanocomposites-based electrochemical immunosensor exhibit an excellent selectivity, which can detect carcinoembryonic antigen (CEA) as low as 0.52 pg mL À1 .…”

Section: -82mentioning

confidence: 99%

Tailored performance of layered transition metal dichalcogenides via integration with low dimensional nanostructures

Liu

Wang

et al. 2017

RSC Adv.

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Transition metal dichalcogenides (TMDs) with a unique sandwich structure have attracted tremendous attention in recent years due to their distinctive electrical and optical properties. The performance of TMDs can be tailored by integration with low dimensional nanostructures which possess quantum size effects and large specific surface areas. In this review, we give a brief description of integrated structures, their synthesis methods, and highlight the applications in hydrogen production, lithium batteries, sensors and detectors.

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Gold nanoparticles on MoS 2 layered crystal flakes

Cited by 37 publications

References 42 publications

Metallic Contact between MoS₂ and Ni via Au Nanoglue

Metallic Contact between MoS₂ and Ni via Au Nanoglue

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS₂

Tailored performance of layered transition metal dichalcogenides via integration with low dimensional nanostructures

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Gold nanoparticles on MoS 2 layered crystal flakes

Cited by 37 publications

References 42 publications

Metallic Contact between MoS2 and Ni via Au Nanoglue

Metallic Contact between MoS2 and Ni via Au Nanoglue

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS2

Tailored performance of layered transition metal dichalcogenides via integration with low dimensional nanostructures

Contact Info

Product

Resources

About

Metallic Contact between MoS₂ and Ni via Au Nanoglue

Metallic Contact between MoS₂ and Ni via Au Nanoglue

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS₂