Results 41 to 50 of about 304,291 (300)
Preresonance Raman spectra of methylpyridines
Journal of Raman Spectroscopy, 1990 AbstractPreresonance Raman spectra of methylpyridines (picolines) are presented for different incident laser wavelengths. A strong intensity variation of the non‐totally symmetric vibration 10α is observed, which implies a vibronic coupling of the lowest nπ* excited state with the next ππ* (B2u and B1u) states. In addition an intensity increase of some
Kosmidis, C. +2 more
openaire +2 more sources
Modified Confinement Model for Size Dependent Raman Shift and Linewidth of Silicon Nanocrystals
, 2009 A modified phonon confinement model considering the size distribution, an improved phonon dispersion curve and a confinement function is developed for the calculation of size dependent Raman spectra of the silicon (Si) nanocrystals.
Arora +21 more
core +1 more source
Raman spectra of BN-nanotubes: Ab-initio and bond-polarizability model calculations [PDF]
, 2005 We present it ab-initio calculations of the non-resonant Raman spectra of zigzag and armchair BN nanotubes. In comparison, we implement a generalized bond-polarizability model where the parameters are extracted from first-principles calculations of the ...
Lazzeri, Michele +3 more
core +5 more sources
A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection
Advanced Engineering Materials, EarlyView.A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan +9 more
wiley +1 more source
Anisotropic effects in the Raman scattering of Re-doped 2H-MoSe2 layered semiconductors
Results in Physics, 2017 We present the anisotropic Raman spectra of the Re-doped MoSe2 layered semiconductor with thicker edge plane grown by chemical vapor transport method.
Chia-Ti Wu +3 more
doaj +1 more source
, 2003 We calculate the parallel (VV) and perpendicular (VH) polarized Raman spectra of amorphous silica. Model SiO2 glasses, uncompressed and compressed, were generated by a combination of classical and ab initio molecular-dynamics simulations and their ...
A. Pasquarello +32 more
core +2 more sources
Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories
Advanced Engineering Materials, EarlyView.Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter +5 more
wiley +1 more source
Anharmonic Raman spectra simulation of crystals from deep neural networks
AIP Advances, 2021 Raman spectroscopy is an effective tool to analyze the structures of various materials as it provides chemical and compositional information. However, the computation demands for Raman spectra are typically significant because quantum perturbation ...
Honghui Shang, Haidi Wang
doaj +1 more source
Phonon Raman scattering of perovskite LaNiO3 thin films
, 2010 We report an investigation of perovskite-type LaNiO3 thin films by Raman scattering in both various scattering configurations and as a function of temperature. The room-temperature Raman spectra and the associated phonon mode assignment provide reference
Chaban, N. +3 more
core +3 more sources
Incorporation of H_2 in vitreous silica, qualitative and quantitative determination from Raman and infrared spectroscopy [PDF]
, 1998 Incorporation mechanisms of H_2 in silica glass were studied with Raman and infrared (IR) microspectroscopy. Hydrogenated samples were prepared at temperatures between 800 deg C and 955 deg C at 2 kbar total pressure.
Bény, Jean-Michel +2 more
core +3 more sources