2023年1月25日 · Here, we employ first-principles calculation to examine Raman spectra of four boron-rich icosahedral crystals: boron carbide (B 4 C), boron-rich boron carbide (B 13 C 2), …

1989年9月15日 · We have obtained and analyzed Raman spectra of single-crystal, hot-pressed, and chemical-vapor-deposited boron carbide materials over their single-phase region (from ∼9 …

2023年8月15日 · The most striking features of the Raman spectrum of boron carbide under pressure are explained theoretically by computing the Raman tensor using density functional …

2024年4月1日 · The influence of surfaces and interfaces on the Raman spectra of boron carbide (B 12 C 3) has been studied using first-principles calculations. The Raman spectra for different …

2022年5月15日 · Raman spectra of boron carbide are simulated using first-principles calculations, and the influence of pressure on the Raman activity is studied by considering dominantly …

Typical Raman spectra of boron carbide with varying B:C ratio acquired at the excitation energy of (a) 3.81 eV (325 nm), (b) 2.41 eV (514.5 nm), (c) 1.95 eV (633 nm), and (d) 1.58 eV (780 nm)....

Single-crystal B4.3C boron carbide is investigated through the pressure-dependence and inter-relation of atomic distances, optical properties and Raman-active phonons up to ~70 GPa. The...

Raman spectra of boron carbide were controversially discussed because absorption coefficient of boron carbide in the range of fundamental place within the very small penetration depth of …

2002年11月11日 · Raman microspectroscopy analysis of the nanoindentations shows the appearance of several bands which suggest dramatic structural changes in the indented material.

1986年4月15日 · Raman spectra of crystalline boron, boron carbide, boron arsenide (B 12 As 2), and boron phosphide (B 12 P 2) are reported. The spectra are compared with other …