Refractive Index and Thickness of Ultrathin Sections of Coals and Graphite by Interferometry

McCartney, J.T.; Ergun, S.

doi:10.1364/josa.52.000197

Cited by 13 publications

(12 citation statements)

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“…Accurate measurements of lignite refractive index were reported by Lohi et al (1992), who observed values of the real and imaginary part of the complex refractive index of 1.70 and 1 × 10 −6 , respectively. Similar values were reported by McCartney and Ergun (1962) and Read (2008). Simulations of the scattering properties of lignite particles are illustrated in Fig.…”

Section: Hygroscopic and Scattering Behaviour Of Lignite Particlessupporting

confidence: 91%

Clear-air lidar dark band

et al. 2018

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Abstract. This paper illustrates measurements carried out by the Raman lidar BASIL in the frame of the HD(CP) 2 Observational Prototype Experiment (HOPE), revealing the presence of a clear-air dark band phenomenon (i.e. a minimum in lidar backscatter echoes) in the upper portion of the convective boundary layer. The phenomenon is clearly distinguishable in the lidar backscatter echoes at 532 and 1064 nm, as well as in the particle depolarisation data. This phenomenon is attributed to the presence of lignite aerosol particles advected from the surrounding open pit mines in the vicinity of the measuring site. The paper provides evidence of the phenomenon and illustrates possible interpretations for its occurrence.

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Section: Hygroscopic and Scattering Behaviour Of Lignite Particlessupporting

confidence: 91%

Clear-air lidar dark band

et al. 2018

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“…Figure 9 also shows the field profile across the dashed line in the upper image, which displays a peak at the edge of the film that was related to a discontinuity in the electric permittivity. For this calculation, the complex refractive index of the carbon film was n = 1.7 + i 0.066, which is the value for lignite and was used to approximate an amorphous carbon film (McCartney & Ergun, 1962). The model showed that the maximum in the field was about 2.3, compared to ∼1.5 either side of the edge.…”

Section: Resultsmentioning

confidence: 99%

Electron-Beam-Induced Carbon Contamination on Silicon: Characterization Using Raman Spectroscopy and Atomic Force Microscopy

et al. 2009

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Electron-beam-induced carbon film deposition has long been recognized as a side effect of scanning electron microscopy. To characterize the nature of this type of contamination, silicon wafers were subjected to prolonged exposure to 15 kV electron beam energy with a probe current of ∼300 pA. Using Raman spectroscopy, the deposited coating was identified as an amorphous carbon film with an estimated crystallite size of 125 Å. Using atomic force microscopy, the cross-sectional profile of the coating was found to be raised and textured, indicative of the beam raster pattern. A map of the Raman intensity across the coating showed increased intensity along the edges and at the corner of the film. The intensity profile was in excess of that which could be explained by thickness alone. The enhancement was found to correspond with a modeled local field enhancement induced by the coating boundary and showed that the deposited carbon coating generated a localized disturbance in the opto-electrical properties of the substrate, which is compared and contrasted with Raman edge enhancement that is produced by surface structure in silicon.

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“…Zeta potential measurements were performed using a Malvern Zetasizer Nano-ZS by applying a refractive index of 2.2 (as graphite), 32 in order to compare the colloidal stability of different MWCNT suspensions.…”

Section: Mwcnt Characterizationmentioning

confidence: 99%

Fabrication and characterization of buckypaper-based nanostructured electrodes as a novel material for biofuel cell applications

Hussein

Urban

Krüger

2011

Phys. Chem. Chem. Phys.

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The fabrication process of buckypapers (BPs) made from stable suspensions of as-received or functionalized multi-walled carbon nanotubes (MWCNTs) with high purity (97.5 wt%, Baytubes), their characterization and their utilization towards novel biofuel cell electrode applications are reported. The BPs can vary in thickness between 1 μm and 200 μm, are mechanically robust, flexible, stable in solvents, possess high meso-porosities as well as high apparent electrical conductivities of up to 2500 S m(-1). Potentiodynamic measurements of biocathodes based on bilirubin oxidase (BOD)-decorated BPs for the oxygen reduction reaction (ORR) in neutral media (phosphate buffer solution) containing glucose indicate that BP electrodes based on functionalized MWCNTs (fBPs) perform better than BP electrodes of as-received MWCNTs and have high potential as an effective electrode material in biofuel cells and biosensors.

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Refractive Index and Thickness of Ultrathin Sections of Coals and Graphite by Interferometry

Cited by 13 publications

References 1 publication

Clear-air lidar dark band

Clear-air lidar dark band

Electron-Beam-Induced Carbon Contamination on Silicon: Characterization Using Raman Spectroscopy and Atomic Force Microscopy

Fabrication and characterization of buckypaper-based nanostructured electrodes as a novel material for biofuel cell applications

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