A powerful propulsion device that enables ultimate simplification is one of the core technologies of microswimmers and microrobots. Here, we report a high-speed swimmer that is self-propelled by the spontaneous asymmetrical heat transfer from a novel hot wire microengine. In particular, we demonstrate that the swimmer, consisting of a U-shaped wire, reciprocated while rotating on the rail in water with high translational velocity (∼13 mm/s) and high rotational velocity (∼30 rad/s). This demonstration experimentally reveals the existence of an unknown phenomenon in which a homogeneous, stationary, hot object in a rest state starts to move and continues to move in one direction. In addition, by comparing the experimental motions with the theoretical motions predicted by a mathematical model, we succeed in explaining the rotational and translational motions that were observed in our experiments. Our findings should contribute significantly to a new class of microengines.

中文翻译：

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通过自发不对称传热自推进的高速游泳者

能够实现极致简化的强大推进装置是微型游泳者和微型机器人的核心技术之一。在这里，我们报告了一种高速游泳者，它通过来自新型热线微型发动机的自发不对称热传递进行自我推进。特别是，我们证明了由 U 形线组成的游泳者在水中以高平移速度（~13 毫米/秒）和高旋转速度（~30 弧度/秒）在轨道上旋转时往复运动。该演示通过实验揭示了一种未知现象的存在，即处于静止状态的均质、静止、热的物体开始运动并继续朝一个方向运动。此外，通过将实验运动与数学模型预测的理论运动进行比较，我们成功地解释了在我们的实验中观察到的旋转和平移运动。我们的发现应该对新型微引擎做出重大贡献。