2019年7月12日 · Recent research has revealed that hBN exhibits a unique combination of optical properties that enable novel (nano)photonic functionalities. Specifically, hBN is a natural hyperbolic material in...

2023年8月16日 · We performed Raman spectroscopy on exfoliated hexagonal boron nitride (hBN) flakes of different thicknesses, placed on a 300 nm SiO 2 on Si substrate.

2016年10月24日 · Here we report an interlayer electron–phonon interaction in WSe2/hBN heterostructures, where optically silent hBN phonons emerge in Raman spectra with strong intensities through resonant ...

2023年2月6日 · Here we show that centimetre-scale multilayer hBN can be synthesized on iron–nickel alloy foil by chemical vapour deposition, and then used as a substrate and as a surface-protecting layer in...

In the case of hBN, our two main findings are (i) the suppression of some of the higher excitonic resonances in the Raman spectrum, contrary to their brightness in the optical absorption spectrum, and (ii) strong quantum interference between the first two excitonic resonances mediated by nonadiabatic effects, which leads to a strong ...

We describe the identification of single- and few- layer boron nitride. Its optical contrast is much smaller than that of graphene but even monolayers are discernable by optimizing viewing conditions. Raman spectroscopy can be used to confirm BN monolayers. They exhibit an upshift in the fundamental Raman mode by up to 4 cm-1.

2024年12月24日 · Raman mapping was performed to investigate the properties of the h-BN/germanium cavities, revealing an h-BN Raman signal enhancement close to the edge of the membrane. This effect was found to be highly dependent on the polarisation of the incident laser used for Raman measurements.

2017年6月22日 · Hexagonal boron nitride (hBN) has recently gained a strong interest as a strategic component in engineering van der Waals heterostructures built with 2D crystals such as graphene. This work reports micro-Raman measurements on hBN flakes made of a few atomic layers, prepared by mechanical exfoliation.

2021年6月30日 · Stress transfer has been investigated for exfoliated hexagonal boron nitride (hBN) nanosheets (BNNSs) through the use of Raman spectroscopy. Single BNNSs of different thicknesses of up to 100 nm (300 layers) were deposited upon a poly(methyl methacrylate) (PMMA) substrate and deformed in unixial tension.

Here, we report that high-quality one-atom-thin hexagonal boron nitride (BN) has a thermal conductivity (κ) of 751 W/mK at room temperature, the second largest κ per unit weight among all semiconductors and insulators. The κ of atomically thin BN decreases with increased thickness.