Structural and Mechanical Analysis of APCVD Deposited Diamond-Like Carbon Thin Films

Ghadai, Ranjan Kumar; Das, Santanu; Kalita, Kanak; Swain, Bibhu P.; Davim, J. Paulo

doi:10.1007/s12633-020-00760-3

Cited by 15 publications

(8 citation statements)

References 34 publications

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“…43 In this case, the I D /I G intensity ratio of fitted D and G bands is also a good proxy for the ratio of sp 3 /sp 2 carbon in these NTP/C samples. 35,[44][45][46] The summary of Raman spectra fitting for the entire set of samples is presented in Table SIII. The analysis shows that in terms of I D /I G ratio there are two distinct types of carbon existing in these composites.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Tutliene

Petrulevičienė

Pilipavičius

et al. 2021

J. Electrochem. Soc.

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Aqueous Na-ion based batteries are considered promising candidates for replacing Li-ion technologies, especially in the area of stationary energy storage. Research and development of novel electrode materials remain a central research effort in this field. NASICON-structured NaTi2(PO4)3 phosphate framework has attracted a great deal of attention and remains the most studied negative electrode material for aqueous Na-ion batteries. The active material preparation and carbon composite property tailoring play a critical role in the electrode materials engineering process which governs the performance of an entire electrochemical system. We present a study of a series of aqueous sol-gel synthesized NaTi2(PO4)3—carbon composites using three different sol-gel approaches and three distinct pyrolysis/calcination strategies. The structural and morphological analysis shows that both the sol-gel route as well as the thermal treatment strategy have significant effects on active material purity and degree of crystallinity as well as the content and properties of the carbonaceous phase. Electrochemical investigations of these composites also show strong effects of the materials structure and carbon matrix morphology on the electrochemical performance and degradation of these materials when employed as aqueous Na-ion battery negative electrodes.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Tutliene

Petrulevičienė

Pilipavičius

et al. 2021

J. Electrochem. Soc.

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“…The C 1s, C 1s scan A, C 1s scan B, and C 1s scan C spectrums are shown in figures 3(a)-(d) which illustrate the deconvolution of the spectrum into four Gaussian peaks. The C 1s peak appeared at 284.22 ev due to the polyester structure (0% nanofiller doping) which refers to C=C chemical bonds (figure 3(a)) [50]. The peaks that appeared at 284.35, 288.23, and 292.33 ev are due to different doping of nanofiller (10, 20, and 40%) (figure 3(a)).…”

Section: Resultsmentioning

confidence: 99%

Preparation and structure investigation of polyethylene terephthalate polyester reinforced Ni_0.5Zn_0.5Fe₂O₄ nanoparticles for gamma ray shielding performance

Almeshari,

Sallam,

Tharwat

et al. 2024

Phys. Scr.

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Defects of high atomic materials gamma-ray shielding such as low chemical stability, low mechanical properties, and heaviness lead us to investigate other light and flexible materials such as polymers. Polymer-doped nanosized materials are the most frequently examined materials. In this study, polyethylene terephthalate [(C10H8O4)n] was doped with Ni0.5Zn0.5Fe2O4 nanoparticles up to 40 wt% (0.0, 10.0, 20.0, 40.0 wt%) prepared by Sol-Gel auto-combustion method with the help of Gelatin. The polyester/Nanofiller composite structures were identified using X-ray photoelectron spectroscopy, X-ray diffraction, Scanning, and Transmission electron microscope as well as density measurements. X-ray photoelectron spectroscopy confirmed the successful doping of nanofiller in the polyester structure as Zn signals appear in the atomic composition and Fe signals appear in the deconvolution of the peaks. X-ray diffraction, transmission, and scanning electron microscope display the same result. X-ray diffraction graph information with the Scherer equation offered the crystal size of the composite (26 nm). Polyester/nanofiller samples were scanned against gamma-ray and experimental shielding factors were computed using a narrow beam transmission technique with sodium iodide detector and two-point sources Cs-137 and Co-60. Experimental Linear and mass attenuation coefficient values swelled as percentages of nanofiller increased in the polyester structure. Experimental Mass attenuation values were compared with theoretical ones estimated from XCOM and Physics-X programs. The difference between them does not exceed 12% which is acceptable as the X-ray photoelectron spectroscopy atomic composition utilized in the theoretical data calculation does not reveal Ni signals. This may occur at the depth of the composite structure. Finally, the half-value layer, the Tenth value layer, and the Mean free path are determined experimentally, and their values are reduced as the nanofiller doping percentage rises in the structure. This result confirms the efficiency of nanofiller addition to the polyester structure to attenuate gamma-ray.

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“…The peaks at ∼2980 and ∼2892 cm −1 arise from −CH 3 -and −CH 2 -hybridized asymmetric and symmetric C−H stretching, respectively. 29,30 These two peaks were more prominent in the DLC film formed at 0.5 and 1.0 kV, rather than the very weak intense peak by the 1.5 kV DLC film. This fact may be attributed to the nucleation and growth stage of the DLC film, and the carbon molecules were endowed with more hydroxylation functional groups than the fully formed DLC film onto the silicon substrate.…”

Section: Physicochemical Studies Of Patterned Dlcmentioning

confidence: 93%

Diamond-like Carbon Patterning by the Submerged Discharge Plasma Technique via Soft Solution Processing

et al. 2023

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Submerged plasma-assisted discharge direct patterning of diamond-like carbon (DLC) onto the silicon substrate in ambient conditions has succeeded as a new and novel soft solution process. In this environmentally benign technique, a copious amount of pure ethanol (ca. 4 mL) was locally activated with a maximum of ca. 0.23 mkWh by an aselectrochemically synthesized ultrasharp tungsten tip. With the assisted submerged plasma, the decomposed ethanol molecules are anodically patterned directly onto the silicon substrate in ambient conditions. The physical nature of DLC patterns was accessed by profilometry, atomic force microscopy, scanning electron microscopy, and transmission electron microscopy analysis. Furthermore, Fourier-transform infrared, Raman, and X-ray photoelectron spectra were analyzed for chemical compositions and structures, such as surface functionalization, carbon−carbon bonding, and sp 2 −sp 3 ratio, respectively. From a Berkovich-configured nanoindentation analysis, Young's modulus and hardness have shown increasing trend with increasing sp 3 −sp 2 ratio in DLC patterns of 68.5 and 2.8 GPa, respectively. From the electrochemical cyclovoltammetry analysis, a maximum areal specific capacitance of 205.5 μF/cm 2 has been achieved at a scan rate of 5 mV/s. The one-step, green, and environmentally sustainable approach of rapid formation of DLC patterns is thus a promising technique for various carbon-based electrode fabrication processes.

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Structural and Mechanical Analysis of APCVD Deposited Diamond-Like Carbon Thin Films

Cited by 15 publications

References 34 publications

Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Preparation and structure investigation of polyethylene terephthalate polyester reinforced Ni_0.5Zn_0.5Fe₂O₄ nanoparticles for gamma ray shielding performance

Diamond-like Carbon Patterning by the Submerged Discharge Plasma Technique via Soft Solution Processing

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Structural and Mechanical Analysis of APCVD Deposited Diamond-Like Carbon Thin Films

Cited by 15 publications

References 34 publications

Electrochemical Performance of Sol-Gel Synthesized NaTi2(PO4)3- Carbon Composites as Aqueous Na-Ion Battery Anodes

Electrochemical Performance of Sol-Gel Synthesized NaTi2(PO4)3- Carbon Composites as Aqueous Na-Ion Battery Anodes

Preparation and structure investigation of polyethylene terephthalate polyester reinforced Ni0.5Zn0.5Fe2O4 nanoparticles for gamma ray shielding performance

Diamond-like Carbon Patterning by the Submerged Discharge Plasma Technique via Soft Solution Processing

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Product

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Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Electrochemical Performance of Sol-Gel Synthesized NaTi₂(PO₄)₃- Carbon Composites as Aqueous Na-Ion Battery Anodes

Preparation and structure investigation of polyethylene terephthalate polyester reinforced Ni_0.5Zn_0.5Fe₂O₄ nanoparticles for gamma ray shielding performance