Transient heat transfer microscope and method thereof for micro-area thermal measurement

Abstract

The invention discloses a transient heat transfer microscope, which comprises a temperature-sensitive nanometer probe, a nanosecond pulse laser system, a dark field microscope system, an imaging system and a delay generator system, wherein the temperature-sensitive nanometer probe provides a micro-area temperature change signal of a sample to be measured; the nanosecond pulse laser system providesthermal disturbance for the sample to be measured; the dark field microscope system carries out microscopic observation on the temperature-sensitive nanometer probe; the imaging system carries out image information collection processing; the delay generator system provides a delay trigger signal; the delay generator system is separately connected with the imaging system and the nanosecond pulse laser system. The invention also discloses a method for micro-area thermal measurement by the transient heat transfer microscope. The nanosecond pulse laser is used for heating the sample to be measured, then, the delay trigger signal generated by the delay generator system is used for controlling the dark field microscope system and the imaging system to collect the scattering images of the temperature-sensitive nanometer probe at different moments in a cooling process, and finally, the cooling curve of the temperature-sensitive nanometer probe can be obtained to obtain the heat transfer coefficient of a liquid medium around the temperature-sensitive nanometer probe.

Description

technical field [0001] The invention relates to a microscopic imaging system, in particular to a transient heat transfer microscope and a method for performing micro-region heat measurement. Background technique [0002] Recently, the thermal measurement of micro-regions has attracted extensive attention of scientific researchers. So far, scientists have developed a variety of means for measuring the temperature of micro-regions (such as cells), such as scanning thermal microscopy (Scanning thermal microscopy, A. Majumdar, Annual Review of Materials Science, 1999, 29, 505-585) and Nanodiamond temperature measurement technology (Nanometre-scale thermometry in a living cell, G. Kucsko, P.C. Maurer, N.Y. Yao Kucsko, Georg, et al., Nature, 2013, 500, 54) and so on. [0003] However, temperature is a state quantity, while heat transfer is a process quantity, and its measurement will be more difficult. In order to accurately measure the heat transfer characteristics of a substan...

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Problems solved by technology

In addition, in order to accurately measure the heat transfer in cells, it is very difficult to reduce the volume of the disturbance and monitoring system to the micron or even nanometer scale in the cell.

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