Thermal Conductivity Measurements of Carbon Nanowalls by 3ω-method (CAT#: STEM-PPA-0049-WXH)

Introduction

Carbon nanowalls (CNWs) are one of the allotropic modifications of carbon and are three-dimensional networks of vertically oriented graphene sheets. CNWs can be synthesized on various metallic, semiconductor and insulator substrates using various techniques.
Carbon nanowalls have tunable band gap, high conductivity, high mechanical robustness, high optical absorbance and other remarkable properties.

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Principle Applications Procedure Materials Notes Related Products

Principle

The process involves a metal heater applied to the sample that is heated periodically. The temperature oscillations thus produced are then measured. The thermal conductivity and thermal diffusivity of the sample can be determined from their frequency dependence.

Applications

Determining the thermal conductivities of bulk material (i.e. solid or liquid) and thin layers

Procedure

1. Sample preparation and mounting
2. Experimental condition setting
3. Experiment start: Turn on the 3ω signal generator and lock-in amplifier, and control the temperature controller to make the sample temperature reach the set value. When the sample reaches a stable state, data acquisition and processing begin.
4. Data processing

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