By Xinwei Wang
This booklet covers the hot applied sciences on micro/nanoscale thermal characterization constructed within the Micro/Nanoscale Thermal technological know-how Laboratory led through Dr. Xinwei Wang. 5 new non-contact and non-destructive applied sciences are brought: optical heating and electric sensing method, temporary electro-thermal strategy, brief photo-electro-thermal method, pulsed laser-assisted thermal rest procedure, and steady-state electro-Raman-thermal approach. those innovations function considerably stronger ease of implementation, large signal-to-noise ratio, and feature the potential of measuring the thermal conductivity/diffusivity of assorted one-dimensional buildings from dielectric, semiconductive, to metal materials.Content:
Chapter 1 creation (pages 1–46):
Chapter 2 Thermal Characterization in Frequency area (pages 47–86):
Chapter three brief applied sciences within the Time area (pages 87–140):
Chapter four Steady?State Thermal Characterization (pages 141–204):
Chapter five Steady?State Optical?Based Thermal Probing and Characterization (pages 205–246):
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Extra resources for Experimental Micro/Nanoscale Thermal Transport
11, the target itself is divided to many small layers in the laser incident direction. Layer 1 is the ﬁrst layer in the laser incident direction. In the calculation, this layer will be far above the target to ensure that ablated material during laser irradiation still has the chance to absorb the laser energy. The laser energy incident on layer 1 within each time step (δt) will be E1 = I δt · A, where A is the top surface of layer 1. This equation assumes the laser is uniform over the target surface.
46) where n is the number density of energy carriers. 45 are used to evaluate the heat ﬂux decay. We take a thin ﬁlm as an example to demonstrate the DECRT technique and illustrate the anisotropic thermal transport inside. In the past, the thermal conductivity of thin ﬁlms has been studied in great detail to reveal how and to what extent the thickness of the ﬁlm affects its thermal conductivity (2). The thin ﬁlm under this discussion has a thickness of L and is inﬁnite along the in-plane directions.
The thermal conductivity determination using Equations 39–41 shares the same principle with the DIRECT ENERGY CARRIER RELAXATION TRACKING (DECRT) 35 Green–Kubo technique in equilibrium MD simulations. Physically, this determination reﬂects a volume-weighted average capability of the material in terms of conducting thermal energy. There could be different numerical techniques for tracking the relaxation of energy carriers in space and time. For instance, the Monte Carlo method can be used by selecting energy carriers starting from randomly selected positions and moving in randomly picked directions.