Modulation of Molybdenum oxidation state via Catalytic-oxidation

Lee, Kangchun; Sun, Seho; Ko, Hyun-Seok; Cho, Sung Beom; Lee, Ganggyu; Lee, Dongsoo; Song, Taeseup; Paik, Ungyu

doi:10.1016/j.apsusc.2023.156330

Cited by 3 publications

(2 citation statements)

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“…Under dynamic light scattering, the MoO3 suspension has an average particle size of 165 nm and the PEDOT: PSS suspension has an average particle size of 750 nm. (Figure 4a) indicating that MO is the highest oxidation state [13]. The relatively higher binding energies than the reported values for crystalline MoO3 can be attributed to the large amount of surface groups.…”

Section: Interfacial Interactionsmentioning

confidence: 70%

“…To further verify the interfacial interactions, the chemical environment of Mo and S is investigated using XPS. (Figure 4b-c) For the pure MoO3, two bands at a binding energy of 236.4 eV (Mo 3d3/2) and 233.3 eV (Mo 3d5/2) correspond to the oxidation state of MOVI,indicating that MO is the highest oxidation state[13]. The relatively higher binding energies than the reported values for crystalline MoO3 can be attributed to the large amount of surface groups.…”

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confidence: 81%

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Preparation and characterization of molybdenum trioxide/poly(3,4-ethylenedioxythiophene): Polystyrene sulphonate nanocomposites for electrochromic application.

Sagir Ziya’ulhaq,

TH Darma

2023

World J. Adv. Eng. Technol. Sci.

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Electrochromic processes are mostly characterized by colour change arising from the energy of a chemical reaction involving electron transfer. Transition metal oxides of tungsten, molybdenum, iridium, and nickel show the most intense Electrochromic colour changes and photochemical stability of about 100 cycles compared to organic electrochromes which are susceptible to photochemical degradation. The prospect of conjugated polymers (comprising of metal oxides and polymers) has opened a new dimension on improving the Electrochromic performance of the transition metal oxides. In this work, solution growth methods were employed in preparing a MoO3/PEDOT: PSS composite layer by adding PEDOT: PSS into MoO3 aqueous dispersion resulting in an electrostatic interaction between MoO3 and PEDOT: PSS for electrochromic application. This composite has shown a long-term stability up to more than 550 cycles which shows higher potential specific capacitance than WO3/PEDOT: PSS. This approach has significantly improved the stability issue of MoO3 and enhances the potential of MoO3-based materials for electrochromic applications. The semi crystalline nature of MoO3-300 °C was further proved by FE-SEM observation of the MoO3 nanoparticles. The particle size shown in the images corresponds with FE-SEM result and polycrystalline structure was observed under high magnification. The polycrystalline nature of the MoO3 particles favors their electrochemical stability, while their small size facilitates their effective interactions with PEDOT: PSS. The electrochemical properties of MoO3, PEDOT: PSS and composite were further studied by cyclic voltammetry (CV) from -1 V to +1 V. MoO3 has a broad oxidation peak at -0.43 V and no obvious reduction peak in this range. PEDOT: PSS has an oxidation peak at -0.02 V and a reduction peak at -0.55 V. In the composite, the peak at -0.43 V becomes a shoulder and a new pair of redox peaks appear at -0.18 V/-0.09 V.

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Section: Interfacial Interactionsmentioning

confidence: 70%

mentioning

confidence: 81%

Preparation and characterization of molybdenum trioxide/poly(3,4-ethylenedioxythiophene): Polystyrene sulphonate nanocomposites for electrochromic application.

Sagir Ziya’ulhaq,

TH Darma

2023

World J. Adv. Eng. Technol. Sci.

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Structural dependency of pyridine carboxylic acid isomers in metal-organic coordination adsorption for copper corrosion inhibition

Seo,

Ryu,

Kwon

et al. 2024

Applied Surface Science

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Mechanisms of Chemically Promoted Material Removal Examined for Molybdenum and Copper CMP in Weakly Alkaline Citrate-Based Slurries

Gamagedara,

Roy

2024

Materials

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Chemical mechanical planarization (CMP) of metal components is an essential step in the fabrication of integrated circuits. Metal CMP is a complex process where strategically activated (electro)chemical reactions serve to structurally weaken the surface layers of the material being processed, and the resulting overburdens are removed under low-force abrasion. Understanding the tribo-electrochemical mechanisms of this process is crucial to successfully designing the consumable materials for advanced CMP slurries that are needed for the new technology nodes. Using a model CMP system involving copper (wiring material in interconnect structures) and molybdenum (a new diffusion barrier material for copper), the present work illustrates a tribo-electroanalytical scheme for studying various mechanistic details of metal CMP. Electroanalytical probes are employed both in the absence and in the presence of surface polishing to quantify the interplay between mechanical abrasion and chemical surface modification. Weakly alkaline slurry formulations are tested with variable concentrations of silica abrasives and a complexing agent, citric acid. The results serve to examine the link between material removal and tribo-corrosion and to identify the functions of the active slurry additives in governing the rates and selectivity of material removal for CMP.

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Modulation of Molybdenum oxidation state via Catalytic-oxidation

Cited by 3 publications

References 40 publications

Preparation and characterization of molybdenum trioxide/poly(3,4-ethylenedioxythiophene): Polystyrene sulphonate nanocomposites for electrochromic application.

Preparation and characterization of molybdenum trioxide/poly(3,4-ethylenedioxythiophene): Polystyrene sulphonate nanocomposites for electrochromic application.

Structural dependency of pyridine carboxylic acid isomers in metal-organic coordination adsorption for copper corrosion inhibition

Mechanisms of Chemically Promoted Material Removal Examined for Molybdenum and Copper CMP in Weakly Alkaline Citrate-Based Slurries

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