Epitaxial growth, electronic hybridization and stability under oxidation of monolayer MoS2 on Ag(1 1 1)

Amaral, Gabriela Moura do; Tonon, Isabela da Costa; Román, Ricardo Javier Peña; Plath, Hannah de Oliveira; Taniguchi, Theo Massao; Lima, Luis Henrique de; Zagonel, Luiz Fernando; Landers, Richard; Siervo, Abner de

doi:10.1016/j.apsusc.2020.148138

Cited by 12 publications

(7 citation statements)

References 72 publications

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“…In this formula, the right three terms represent the total energies of the optimized MoS 2 /Ag(111) heterostructure, MoS 2 , and Ag(111) substrate, respectively, and N is the number of unit cells. The high interfacial binding energy of MoS 2 /Ag(111) indicates that a strained 2D MoS 2 can be stabilized on Ag(111). , …”

Section: Resultsmentioning

confidence: 99%

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)

Wang

Zhu

et al. 2022

ACS Catal.

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Selective hydrogenation of carbon dioxide (CO 2 ) into value-added chemicals via highly efficient catalysts is of great significance in CO 2 conversion and utilization. Here, taking Cu N /MoS 2 /Ag(111) heterostructures (N = 1−8) as prototypical examples, we theoretically establish a concept of a dynamically magic single-cluster catalyst (DMSCC) for high-efficient selective hydrogenation of CO 2 to CH 3 OH. It is found that, though Cu 2 and Cu 8 in the gas phase are well recognized as magic clusters due to closed-shell electronic structures, Cu 3 and Cu 7 become new magic clusters when deposited on MoS 2 /Ag(111) due to their high-symmetric structures and strong Cu−S ionic bonding. Moreover, the dynamic evolution of the geometric structure of the Cu 3 species with an alkali-metal-like electronic feature and the d z 2 frontier orbital accounts for its highly selective catalytic activity for CO 2 reduction to CH 3 OH rather than HCOO with a low rate-limiting reaction barrier of ∼1.10 eV. However, the deposited Cu 7 is relatively highly inert toward CO 2 activation because of its halogen-element-like electronic characteristics. The present findings on DMSCC are expected to be constructive in design and fabrication of highly efficient single-atomic-scale catalysts for CO 2 activation and conversion.

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Section: Resultsmentioning

confidence: 99%

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)

Wang

Zhu

et al. 2022

ACS Catal.

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“…This is attributed to carbodithiolate (-CS 2 ) groups which possess higher chemisorption attributes with other molecules, owing to their interatomic S-S bond lengths being virtually perfect for epitaxial adsorption onto gold nanoparticles surfaces. 191,192 In other studies, dithiocarbamates have been used to functionalize gold nanorods (GNR) for a variety of applications instead of cetyltrimethylammonium bromide (CTAB) commonly used in nanorod synthesis. [193][194][195] A recent study reports folate-conjugated gold nanorods fabricated by anchoring onto GNRs surface by in situ DTC synthesis.…”

Section: Perspective Dalton Transactionsmentioning

confidence: 99%

Addressing the gaps in homeostatic mechanisms of copper and copper dithiocarbamate complexes in cancer therapy: a shift from classical platinum-drug mechanisms

et al. 2023

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“…Besides operating under UHV and at LT, the STM and light injection and collection device can be used in air (ambient conditions). 30,109 Here are presented some results obtained in WSe 2 monolayers excited with the tunneling current when the STM operated in ambient conditions.…”

Section: Luminescence Experiments Inside the Stm In Ambient Conditionsmentioning

confidence: 99%

“…20 In particular, and within the scope of the present work, STM-LE has already yielded great insights for plasmonics, arXiv:2210.04833v1 [physics.ins-det] 10 Oct 2022 oxides, molecules, III-V and II-VI semiconductors among others [21][22][23][24][25][26] and more recently in the 2D semiconductors MoSe 2 and WSe 2 . [27][28][29][30] One key issue in STM-LE studies is the light collection strategy since the light emission yield is about 10 −4 to 10 −6 photons per electron 31 . Such quantum yield is much smaller than what is achieved by STEM-CL for instance, which can be as high as 1 photon per electron 18,32 .…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

Román

Auad

Grasso

et al. 2022

Review of Scientific Instruments

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We present the design, implementation, and illustrative results of a light collection/injection strategy based on an off-axis parabolic mirror collector for a low-temperature Scanning Tunneling Microscope (STM). This device allows us to perform STM induced Light Emission (STM-LE) and Cathodoluminescence (STM-CL) experiments and in situ Photoluminescence (PL) and Raman spectroscopy as complementary techniques. Considering the Étendue conservation and using an off-axis parabolic mirror, it is possible to design a light collection and injection system that displays 72% of collection efficiency (considering the hemisphere above the sample surface) while maintaining high spectral resolution and minimizing signal loss. The performance of the STM is tested by atomically resolved images and scanning tunneling spectroscopy results on standard sample surfaces. The capabilities of our system are demonstrated by performing STM-LE on metallic surfaces and two-dimensional semiconducting samples, observing both plasmonic and excitonic emissions. In addition, we carried out in situ PL measurements on semiconducting monolayers and quantum dots and in situ Raman on graphite and hexagonal boron nitride (h-BN) samples. Additionally, STM-CL and PL were obtained on monolayer h-BN gathering luminescence spectra that are typically associated with intragap states related to carbon defects. The results show that the flexible and efficient light injection and collection device based on an off-axis parabolic mirror is a powerful tool to study several types of nanostructures with multiple spectroscopic techniques in correlation with their morphology at the atomic scale and electronic structure.

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Epitaxial growth, electronic hybridization and stability under oxidation of monolayer MoS2 on Ag(1 1 1)

Cited by 12 publications

References 72 publications

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)

Addressing the gaps in homeostatic mechanisms of copper and copper dithiocarbamate complexes in cancer therapy: a shift from classical platinum-drug mechanisms

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

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Epitaxial growth, electronic hybridization and stability under oxidation of monolayer MoS2 on Ag(1 1 1)

Cited by 12 publications

References 72 publications

Selective Hydrogenation of CO2 to CH3OH on a Dynamically Magic Single-Cluster Catalyst: Cu3/MoS2/Ag(111)

Selective Hydrogenation of CO2 to CH3OH on a Dynamically Magic Single-Cluster Catalyst: Cu3/MoS2/Ag(111)

Addressing the gaps in homeostatic mechanisms of copper and copper dithiocarbamate complexes in cancer therapy: a shift from classical platinum-drug mechanisms

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

Contact Info

Product

Resources

About

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)

Selective Hydrogenation of CO₂ to CH₃OH on a Dynamically Magic Single-Cluster Catalyst: Cu₃/MoS₂/Ag(111)