“手到擒来”的微观“快递员”

Core Insights - The article discusses the development of a 3D micro-nano robot by the Institute of Physics and Chemistry, Chinese Academy of Sciences, which can perform precise tasks in the microscopic world, paving the way for future advancements in precision medicine [1][7]. Group 1: Micro-Nano Robot Overview - Micro-nano robots are intelligent miniature machines that operate at the micro to nano scale, capable of movement, rotation, and manipulation of tiny particles or cells, thus enabling human interaction in the microscopic realm [2]. - The new design overcomes limitations of existing micro-nano robots, which often use single material systems and struggle with multi-step operations in complex environments [2][5]. Group 2: Design and Functionality - The micro-nano robot features a hand-like design that allows for flexible observation and manipulation of target particles, enhancing its operational capabilities [2]. - It is constructed using femtosecond laser direct writing technology, which allows for high-precision fabrication of various micro-nano structures with different functionalities [5]. Group 3: Operational Mechanism - The robot operates by responding to changes in pH levels in its environment, with its "hands" opening and closing like a flower in response to acidic or alkaline conditions [6]. - It can transport and release particles or cells with a maximum speed of 65.56 micrometers per second, demonstrating agility in navigating obstacles [6]. Group 4: Potential Applications - The micro-nano robot has significant potential in precision medicine, such as drug delivery and cellular manipulation, and could serve as an invisible assistant to doctors [7]. - Beyond medical applications, it can also be utilized in environmental remediation and micro-manufacturing, such as removing specific pollutants from water environments [7].