In-situ two-step Raman thermometry for thermal characterization of monolayer graphene interface material

Zhao, Wenqiang; Chen, Wen; Yue, Yanan; Wu, Shijing

doi:10.1016/j.applthermaleng.2016.11.063

Cited by 35 publications

(9 citation statements)

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“…64 R K is inversely proportional to the work of adhesion, 62,65 and therefore a higher R K resistance is expected between the water and the hydrophobic graphene-coated glass. Moreover, very high values of R K between graphene and SiO 2 interfaces have been measured, 66 including a dramatically fiveorder of magnitude increase in R K when the graphene is not in full contact with glass but presents some corrugation of nmsized height.…”

Section: Asmentioning

confidence: 99%

In Situ Photothermal Response of Single Gold Nanoparticles through Hyperspectral Imaging Anti-Stokes Thermometry

et al. 2020

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Several fields of applications require a reliable characterization of the photothermal response and heat dissipation of nanoscopic systems, which remains a challenging task for both modeling and experimental measurements. Here, we present an implementation of anti-Stokes thermometry that enables the in situ photothermal characterization of individual nanoparticles (NPs) from a single hyperspectral photoluminescence confocal image. The method is label-free, potentially applicable to any NP with detectable anti-Stokes emission, and does not require any prior information about the NP itself or the surrounding media. With it, we first studied the photothermal response of spherical gold NPs of different sizes on glass substrates, immersed in water, and found that heat dissipation is mainly dominated by the water for NPs larger than 50 nm. Then, the role of the substrate was studied by comparing the photothermal response of 80 nm gold NPs on glass with sapphire and graphene, two materials with high thermal conductivity. For a given irradiance level, the NPs reach temperatures 18% lower on sapphire and 24% higher on graphene than on bare glass. The fact that the presence of a highly conductive material such as graphene leads to a poorer thermal dissipation demonstrates that interfacial thermal resistances play a very significant role in nanoscopic systems and emphasize the need for in situ experimental thermometry techniques. The developed method will allow addressing several open questions about the role of temperature in plasmon-assisted applications, especially ones where NPs of arbitrary shapes are present in complex matrixes and environments.

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Section: Asmentioning

confidence: 99%

In Situ Photothermal Response of Single Gold Nanoparticles through Hyperspectral Imaging Anti-Stokes Thermometry

et al. 2020

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“…Targeted and detailed researches on ITR and phonon scattering are still in lack [32]. It is acknowledged that Raman spectroscopy can reflect the vibration and rotation of molecules and can reflect the phonon vibration mode, which can be used to characterize the thermal conduction and the degree of phonon scattering at the interfaces [33,34]. Yue et al [35] used Raman spectroscopy to study the thermal conduction property of the interfaces between molybdenum disulfide (MoS 2 ) and silica (SiO 2 ) as well as that between MoS 2 and graphene, respectively, finding that the thermal conduction property of the interfaces between MoS 2 and graphene was significantly better than MoS 2 /SiO 2 , because graphene obtains higher λ than SiO 2 , and the heat at the interfaces can be transferred more efficiently.…”

Section: Introductionmentioning

confidence: 99%

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Ruan

Guo

et al. 2021

Research

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The developing flexible electronic equipment are greatly affected by the rapid accumulation of heat, which is urgent to be solved by thermally conductive polymer composite films. However, the interfacial thermal resistance (ITR) and the phonon scattering at the interfaces are the main bottlenecks limiting the rapid and efficient improvement of thermal conductivity coefficients (λ) of the polymer composite films. Moreover, few researches were focused on characterizing ITR and phonon scattering in thermally conductive polymer composite films. In this paper, graphene oxide (GO) was aminated (NH2-GO) and reduced (NH2-rGO), then NH2-rGO/polyimide (NH2-rGO/PI) thermally conductive composite films were fabricated. Raman spectroscopy was utilized to innovatively characterize phonon scattering and ITR at the interfaces in NH2-rGO/PI thermally conductive composite films, revealing the interfacial thermal conduction mechanism, proving that the amination optimized the interfaces between NH2-rGO and PI, reduced phonon scattering and ITR, and ultimately improved the interfacial thermal conduction. The in-plane λ (λ∥) and through-plane λ (λ⊥) of 15 wt% NH2-rGO/PI thermally conductive composite films at room temperature were, respectively, 7.13 W/mK and 0.74 W/mK, 8.2 times λ∥ (0.87 W/mK) and 3.5 times λ⊥ (0.21 W/mK) of pure PI film, also significantly higher than λ∥ (5.50 W/mK) and λ⊥ (0.62 W/mK) of 15 wt% rGO/PI thermally conductive composite films. Calculation based on the effective medium theory model proved that ITR was reduced via the amination of rGO. Infrared thermal imaging and finite element simulation showed that NH2-rGO/PI thermally conductive composite films obtained excellent heat dissipation and efficient thermal management capabilities on the light-emitting diodes bulbs, 5G high-power chips, and other electronic equipment, which are easy to generate heat severely.

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“…Therefore, it needs to be cautioned that the measured value is composed of interfacial resistance between Si and SiO2, thermal resistance of SiO2 layer, and interfacial resistance between graphene and SiO2. [36] 3.2 Two-step Raman method for in-plane thermal conductivity Most characterizations solely focus on either in-plane transport or cross-plane interfacial transport, while only few researchers consider the comprehensive transport for the interface materials. In electronic applications, the interface heat dissipation and in-plane thermal transport are coupled when a heat spot exists.…”

Section: Raman Penetrating Methods For Interface Thermal Resistancementioning

confidence: 99%

“…Targeting this gap, a two-step approach based on Raman is developed for localized measurement of both thermal conductivity and interfacial thermal conductance. [36] The two-step Raman involves the 1 st step on Joule heating Raman penetration method to characterize interfacial thermal resistance as introduced above, and the 2 nd step is about in-plane thermal conductivity measurement based on laser heating.…”

Section: Raman Penetrating Methods For Interface Thermal Resistancementioning

confidence: 99%

Micro/Nanoscale Thermal Characterization Based on Spectroscopy Techniques

Gu¹,

She²,

Yue³

2020

ES Energy Environ.

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Low-dimensional materials, which possess extraordinary physical properties, bring huge opportunities in advanced thermal management. Upon their large-scale applications, understanding the thermal transport properties is essential. However, the micro-to-nanoscale diameter/thickness leads to extreme difficulties in thermal characterization. Few techniques have been developed in past years targeting specific structures. Regardless of how it works, accurate temperature probing and evaluation of heat spreading is most critical. Laser-based spectroscopy technique, such as micro-Raman, characterizes thermal properties based on temperature response of Raman scattering. The temperature probing from distinct peaks determines that the spatial resolution is not limited by the size of focused laser spot. Thus, it is capable of characterizing materials with dimension from macro down to nanoscale. This paper introduces the spectroscopy-based techniques developed in our lab for micro/nanoscale thermal characterizations. Raman as the primary one is detailed most. In addition, the advance of fluorescence spectroscopy techniques is briefly introduced. Due to the noncontact and non-destructive nature, the spectroscopy based technique has great potentials not only in micro/nanoscale characterization of thermosphysical properties, but also in extreme scale laser-assisted manufacturing field.

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In-situ two-step Raman thermometry for thermal characterization of monolayer graphene interface material

Cited by 35 publications

References 50 publications

In Situ Photothermal Response of Single Gold Nanoparticles through Hyperspectral Imaging Anti-Stokes Thermometry

In Situ Photothermal Response of Single Gold Nanoparticles through Hyperspectral Imaging Anti-Stokes Thermometry

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Micro/Nanoscale Thermal Characterization Based on Spectroscopy Techniques

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