Raman Spectra of Carbon-Based Materials (from Graphite to Carbon Black) and of Some Silicone Compositespolymer nanocompositescarbon nanomaterialsRaman spectroscopyPoly(dimethylsiloxane)ElastomersCarbon-based nanomaterials have emerged as a subject of enormous scientific attention due to their outstanding ...
Raman spectra of inorganic solids/ Raman spectroscopychondrulesagglomerationolivinerim compositionthermal historystonedisordered graphiteThe Tieschitz H3 chondrite contains 0.25% bulk carbon 1 but concentrations of as much as 2–6% (ref. 2) occur in black, 10–20 m-wide rims around chondrules that ...
The spectra appear deceivingly simple: just a couple of very intense bands in the 1000–2000 cm–1 region and few other second-order modulations. However, their shape, intensity, and positions allow us to distinguish a hard, amorphous carbon from a metallic nanotube, giving as much information...
In the first study of its kind, we previously investigated Raman spectra of 17 papyri from the Columbia University Libraries collection, written in carbon-based black ink with well-established dates between 400 BCE and 1000 CE. Using a simple two-peak spectral model for the Raman spectrum of ...
Raman spectra were recorded from multiple points on both traces, Figure 3b. While both traces share some Raman signatures (orange peaks), there are significant differences. Trace 1 has several unique signatures (green peaks), and the intensity of certain bands differs between the traces. For ...
Owing to the physical mechanism at their basis, Raman spectra are sensitive to any change in the material that alters the energy of optical phonons, like the breaking or formation of chemical bonds, phase transitions, residual strain/stress, or the presence of lattice defects. One of the ...
resonant Raman spectra of a suspended SWNT. The maximum strain used in this series of measurements was estimated to be 1%. There is some uncertainty in this value due to the uncertainty in the amount of slack present initially in the suspended nanotube and the possible influence of ...
Such non-invasive monitoring approaches have great advantage since they allow using simpler, cheaper, and more versatile sensors, while simultaneously greatly reducing the risk of contamination which is a pervasive problem in fermentation processes. Raman spectra of microbial biomass exhibit a wide range...
The measurement is combined from 370 individual spectra which are shown in Fig. 2b in a false-colour map as a function of the cavity length. With such a high sampling it is possible to achieve a spectral resolution beyond that of the spectrometer and to resolve also narrow lines, whereby ...
The pink line segment on the upper left indicates the diameter transition region of CNT-2. Scale bar, 5 nm. (c) Comparison of far-field Raman (black, no tip) and TERS (red and blue) spectra taken at two locations on CNT-2 as indicated in (a). Accumulation time of each spectrum ...