Repressing oxidative wear within Si doped DLCs

Lanigan, Joseph; Wang, Chun; Morina, Ardian; Neville, Anne

doi:10.1016/j.triboint.2014.11.004

Cited by 23 publications

(6 citation statements)

References 43 publications

(53 reference statements)

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“…%) is presumably related to the vibrations in the Si-O in Si-O-Si groups, which was assigned also to the 1034 cm −1 spectral line [38]. Our previous study [27,42] confirmed that in the case of polymeric substrates modified with DLC:Si layers, the high dissociation energy of the Si-O bonding equal to 798 kJ mol −1 resulted in a significant increase in the mechanical resistance of the modified surface. All the modifications of the PU substrates also resulted in the appearance of a spectra line for 1642 cm −1 that is assigned to the vibrations in the C=C and C=N groups [43,44].…”

Section: Ftir-atr Analysissupporting

confidence: 62%

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

et al. 2020

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DLC:Si and DLC:N (diamond-like carbons doped with Si or N) functional layers in different configurations are deposited on polyurethane (PU) for bioengineering applications using CCP (capacitively coupled plasma) discharge generated in the PE CVD (plasma-enhanced chemical vapor deposition) system. Scanning electron microscopy (SEM) observations show that the obtained single and multilayers are continuous and well adherent to the substrates, but they differ in surface morphologies. DLC:Si layers form granular-like outer surfaces, while DLC:N ones a mosaic structure of plain areas. Topography analyses by atomic force microscopy (AFM) and optical profilometry reveal that Si-doped layers are characterized by significantly higher surface roughness (Ra ca. 5 nm) in comparison to N-doped layers (Ra ca. 0.3 nm) and also higher values of profile roughness parameter Rz (up to 32 μm vs. about 13 μm). Energy-dispersive X-ray spectroscopy (EDS) analysis indicates the homogenous chemical composition of the layers. DLC:N layers, are characterized by significantly higher polar component of surface free energy (up to ca. 5.0 mJ/m2). DLC:Si layers exhibit higher values of diiodomethane contact angle (up to ca. 90°) compared with DLC:N layers (up to ca. 55°). The attenuated total reflectance Fourier transform infrared spectroscopic measurements (ATR-FTIR) of the layers reveal that the addition of silicon to the DLC structure increases the content of terminal CHn bonds (n = 1, 2, 3) as well as beneficial Si–H and Si–CHn bonds, which significantly reduce the internal stresses in the layers. Both DLC:Si and DLC:N layers exhibit no cytotoxic effects using the human osteoblast-like cell line and human keratinocytes.

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Section: Ftir-atr Analysissupporting

confidence: 62%

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

et al. 2020

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“…By using the XPS instrument, it is observed that the TMSPO-added electrolyte generates the surface film on the LNMO electrode after the first charging process (Figure ). The binding energies of the observable functional groups in surface films on the LNMO electrode are summarized in Table . ,,,− Figure a–c shows Si 2p XPS spectra, in which any intensities for silicon bonds are negligible. Figure d–f and g–i show C 1s and O 1s XPS spectra, respectively.…”

Section: Resultsmentioning

confidence: 99%

A Bifunctional Electrolyte Additive for High-Voltage LiNi_0.5Mn_1.5O₄ Positive Electrodes

Lee

Soon

Chae

et al. 2019

ACS Appl. Mater. Interfaces

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4-(Trimethylsiloxy)-3-pentene-2-one (TMSPO) is tested as an electrolyte additive to enhance Coulombic efficiency and cycle retention for the Li/ LiNi 0.5 Mn 1.5 O 4 (LNMO) half-cell and graphite/LNMO fullcell. TMSPO carries two functional groups, siloxane (−Si− O−) and carbon−carbon (CC) double bonds. It is found that the siloxane group reacts with hydrogen fluoride (HF), which is generated by hydrolysis of lithium hexafluorophosphate (LiPF 6 ) by impure water in the electrolyte solution, to produce 4-hydroxypent-3-ene-2-one (HPO). The as-generated HPO, as well as TMSPO itself, is electrochemically oxidized to form a protective surface film on the LNMO electrode, in which it is inferred that the carbon−carbon (CC) double bond initiates radical polymerization. The surface film derived from the TMSPO-added electrolyte shows a superior passivating ability to that generated from the pristine (TMSPO-free) electrolyte. The suppression of electrolyte oxidation enabled by the superior passivating ability offers two beneficial features to the half-cells and full-cells: the suppression of both HF generation and deposition of the resistive surface film on LNMO. As a result, the metal dissolution by HF attack on LNMO appears to be smaller by the addition of TMSPO. The cell polarization is also less significant because of the latter beneficial feature. In short, the bifunctional activity of TMSPO (HF scavenger and protective film former) allows an enhanced Coulombic efficiency and cycle retention to the half-cell and full-cell.

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“…21 at.%, based on EDS analysis) is probably associated with vibrations in the Si-O in Si-O-Si groups, which was assigned to the 1035 cm −1 spectral line [41]. It is noteworthy that in the case of modification with Si-DLC layers, the high dissociation energy of the Si-O bonding (798 kJ/mol) [44] resulted in a significant increase in the mechanical resistance of the modified surface.…”

Section: Ftir-atr Analysismentioning

confidence: 98%

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

et al. 2018

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In this paper, the surface properties and selected mechanical and biological properties of various multi-layer systems based on diamond-like carbon structure deposited on low-density polyethylene (LDPE) substrate were studied. Plasma etching and layers deposition (incl. DLC, N-DLC, Si-DLC) were carried out using the RF CVD (radio frequency chemical vapor deposition) method. In particular, polyethylene with deposited N-DLC and DLC layers in one process was characterized by a surface hardness ca. seven times (up to ca. 2.3 GPa) higher than the unmodified substrate. Additionally, its surface roughness was determined to be almost two times higher than the respective plasma-untreated polymer. It is noteworthy that plasma-modified LDPE showed no significant cytotoxicity in vitro. Thus, based on the current research results, it is concluded that a multilayer system (based on DLC coatings) obtained using plasma treatment of the LDPE surface can be proposed as a prospective solution for improving mechanical properties while maintaining biocompatibility.

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Repressing oxidative wear within Si doped DLCs

Cited by 23 publications

References 43 publications

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

A Bifunctional Electrolyte Additive for High-Voltage LiNi_0.5Mn_1.5O₄ Positive Electrodes

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

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Repressing oxidative wear within Si doped DLCs

Cited by 23 publications

References 43 publications

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

Deposition, morphology and functional properties of layers based on DLC:Si and DLC:N on polyurethane

A Bifunctional Electrolyte Additive for High-Voltage LiNi0.5Mn1.5O4 Positive Electrodes

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

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A Bifunctional Electrolyte Additive for High-Voltage LiNi_0.5Mn_1.5O₄ Positive Electrodes