Combustion is a chemical reaction that emits heat and light. Nanofire is a kind of flameless combustion that occurs on the micro–nano scale. Pt/Al2O3 film with a thickness of 20 nm can be prepared as a catalyst by micro–nano processing. When the methanol-air mixture gas passes through the surface of the catalyst, a chemical reaction begins and a significant temperature rise occurs in the catalyst region. Compared to macroscopic combustion, Nanofire has many special properties, such as large temperature gradients, uniform temperature distribution, and fast temperature response. The large temperature gradient is the most important property of Nanofire, which can reach 1330 K/mm. Combined with thermoelectric materials, it can realize the efficient conversion of chemical energy to electric energy. Nanoscale thickness offers the possibility of establishing thermal gradient. On the other hand, large thermal gradient has an effect on the transport properties of phonons and electrons in film materials. From these we can get the scale effects of heat. This article will provide an overview of the preparation, properties and applications of Nanofire, and then a comprehensive introduction to the thermal scale and thermal scale effects.

中文翻译：

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纳米火和热的比例效应。

燃烧是一种化学反应，会散发热量和光。纳米火是一种发生在微纳尺度上的无焰燃烧。可以通过微纳工艺制备厚度为20 nm的Pt / Al2O3薄膜作为催化剂。当甲醇-空气混合物气体通过催化剂表面时，化学反应开始，并且在催化剂区域中发生明显的温度升高。与宏观燃烧相比，Nanofire具有许多特殊的特性，例如大的温度梯度，均匀的温度分布和快速的温度响应。大的温度梯度是Nanofire的最重要特性，可以达到1330 K / mm。结合热电材料，可以实现化学能向电能的高效转化。纳米级厚度提供了建立热梯度的可能性。另一方面，大的热梯度会影响薄膜材料中声子和电子的传输特性。从中我们可以得到热量的比例效应。本文将概述Nanofire的制备，性质和应用，然后全面介绍热垢和热垢效应。