Characterization of anisotropic thermal conductivity of suspended nm-thick black phosphorus with frequency-resolved Raman spectroscopy

Wang, Tianyu; Han, Meng; Wang, Ridong; Yuan, Pengyu; Xu, Shen; Wang, Xinwei

doi:10.1063/1.5023800

Cited by 25 publications

(16 citation statements)

References 44 publications

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“…Hitherto, the micro-Raman thermometry (MRT) has been a common and effective method for the experimental study of thermal conductivity, which can directly and nondestructively explore the phonon information of semiconductor heat transfer. One of the significant advantages of the presented method is needless micro-nano device fabrication [26][27][28]. In this procedure, the laser focuses on the suspended film center to form a temperature gradient.…”

Section: Introductionmentioning

confidence: 99%

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe2

Chen

Zhang

et al. 2021

Sustainability

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Low-symmetry two-dimensional (2D) materials have exhibited novel anisotropic properties in optics, electronics, and mechanics. Such characteristics have opened up new avenues for fundamental research on nano-electronic devices. In-plane thermal conductivity plays a pivotal role in the electronic performance of devices. This article reports a systematic study of the in-plane anisotropic thermal conductivity of PdSe2 with a pentagonal, low-symmetry structure. An in-plane anisotropic ratio up to 1.42 was observed by the micro-Raman thermometry method. In the Raman scattering spectrum, we extracted a frequency shift from the mode with the most sensitivity to temperature. The anisotropic thermal conductivity was deduced by analyzing the heat diffusion equations of suspended PdSe2 films. With the increase in thickness, the anisotropy ratio decreased gradually because the thermal conductivity in the x-direction increased faster than in the y-direction. The anisotropic thermal conductivity provides thermal management strategies for the next generation of nano-electronic devices based on PdSe2.

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Section: Introductionmentioning

confidence: 99%

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe2

Chen

Zhang

et al. 2021

Sustainability

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“…The FR-Raman technique not only provides a novel way to probe transient thermal transport with very high temporal resolution, but also can be used to characterize the anisotropic thermal conductivities of materials without the need of optical absorption and temperature coefficient [ 26 ]. The example given here is for the measurement of black phosphorus (BP).…”

Section: Time-domain Differential and Frequency-resolved Ramanmentioning

confidence: 99%

“…( d ) Sample irradiated by a continuous wave (CW) laser beam after cutting at two parallel boundaries. Reprinted from [ 26 ], with the permission of AIP Publishing.…”

Section: Figurementioning

confidence: 99%

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Energy and Charge Transport in 2D Atomic Layer Materials: Raman-Based Characterization

Wang

Zobeiri

et al. 2020

Nanomaterials

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As they hold extraordinary mechanical and physical properties, two-dimensional (2D) atomic layer materials, including graphene, transition metal dichalcogenides, and MXenes, have attracted a great deal of attention. The characterization of energy and charge transport in these materials is particularly crucial for their applications. As noncontact methods, Raman-based techniques are widely used in exploring the energy and charge transport in 2D materials. In this review, we explain the principle of Raman-based thermometry in detail. We critically review different Raman-based techniques, which include steady state Raman, time-domain differential Raman, frequency-resolved Raman, and energy transport state-resolved Raman techniques constructed in the frequency domain, space domain, and time domain. Detailed outlooks are provided about Raman-based energy and charge transport in 2D materials and issues that need special attention.

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“…11 (b)). 140 Luo et al applied confocal Raman microspectroscopy to measure thermal conductivities of armchair and zigzag BP (Fig. 11(c)).…”

Section: Thermal Transport Propertiesmentioning

confidence: 99%

Applications of Raman spectroscopy in two-dimensional materials

Yin

Lin

2020

J. Innov. Opt. Health Sci.

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At present, two-dimensional (2D) materials have shown great application potential in numerous fields based on their physical chemical and electronic properties. Raman spectroscopy and derivative techniques are effective tools for characterizing 2D materials. Raman spectroscopy conveys lots of knowledge on 2D materials, including layer number, doping type, strain and interlayer coupling. This review summarized advanced applications of Raman spectroscopy in 2D materials. The challenges and possible applied directions of Raman spectroscopy to 2D materials are discussed in detail.

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Characterization of anisotropic thermal conductivity of suspended nm-thick black phosphorus with frequency-resolved Raman spectroscopy

Cited by 25 publications

References 44 publications

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe2

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe2

Energy and Charge Transport in 2D Atomic Layer Materials: Raman-Based Characterization

Applications of Raman spectroscopy in two-dimensional materials

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