Core Insights - Researchers at Leiden University have developed a remarkable metamaterial that can autonomously contract and expand without external force, resembling a "breathing" mechanism, opening new avenues for smart reconfigurable materials and micro-robotics [1][2] Group 1: Metamaterial Characteristics - The metamaterial is the first of its kind to exhibit such dynamic behavior at the microscopic level, challenging traditional perceptions of matter where movement is typically attributed to the material itself [1] - The structure is composed of tiny silica spheres assembled into meticulously designed building blocks, with each unit being one-tenth the width of a human hair, arranged in a rhombic pattern [1] - The precise control of particle connections ensures mechanical stability while allowing for free rotation, culminating in a complex architecture known as "cage lattice" [1] Group 2: Mechanism of Movement - Under optical microscopy, these microstructures display the ability to spontaneously contract and expand, driven by thermal energy that facilitates elegant folding and unfolding [2] - The movement is coordinated; when one set of quadrilaterals rotates clockwise, adjacent sets respond by rotating counterclockwise, creating a harmonious rhythm of contraction and expansion [2] - The introduction of magnetic particles allows for control over this microscopic "dance," with magnetic fields enabling precise regulation of the structure's contraction and expansion [2] Group 3: Future Applications - A theoretical framework has been established to describe the interaction between thermal motion and the metamaterial, with experimental results aligning closely with theoretical predictions [3] - This self-breathing metamaterial is expected to lay the groundwork for applications in artificial muscles, adaptive optical devices, and micro-robots that can autonomously respond to environmental changes [3]

Core Viewpoint - Dutch physicists from Leiden University have developed a remarkable metamaterial that can autonomously contract and expand without any external force, resembling a self-"breathing" mechanism, opening new avenues for smart reconfigurable materials and micro-robotics [1][2]. Group 1 - The research team has created a structure in the microscopic world that challenges traditional perceptions of matter, where movement is derived from the intricate connections between particles rather than the material itself [1]. - The metamaterial is constructed from tiny silica spheres assembled into carefully designed building blocks, with each structural unit being 1/10th the width of a human hair, arranged in a rhombic pattern to ensure mechanical stability and allow for free rotation [1]. - The final structure, named "cage lattice," showcases the team's ability to build increasingly complex architectures from basic units [1]. Group 2 - Under optical microscopy, these microstructures exhibit the ability to spontaneously contract and expand, driven by thermal energy that facilitates elegant folding and unfolding movements [2]. - The movement is coordinated, with one set of quadrilaterals rotating clockwise while adjacent sets rotate counterclockwise, creating a harmonious rhythm of contraction and expansion [2]. - The introduction of magnetic particles allows for control over this microscopic "dance," with the opening and closing of magnetic fields precisely regulating the structure's contraction and expansion, paving the way for real-world applications [2]. Group 3 - The team has established a theoretical framework describing the interaction between thermal motion and the metamaterial, with experimental results closely aligning with theoretical predictions [3]. - This self-"breathing" metamaterial is expected to lay the groundwork for applications in artificial muscles, adaptive optical devices, and micro-robots that can autonomously respond to environmental changes [3].

Core Viewpoint - The article discusses the advancements and potential of micro-robotics in the medical field, particularly in remote surgery and targeted drug delivery, highlighting the challenges and innovations in treating critical conditions like diffuse intrinsic pontine glioma and stroke [4][5][10]. Summary by Sections Event Overview - The 2025 World Robot Conference will be held from August 8 to 12 in Beijing, featuring a main forum and 31 activities with 416 experts sharing insights on new technologies and applications [1]. Micro-Robotics in Medicine - Micro-robotics is gaining attention for its applications in medicine, especially in remote surgery [4]. - The focus is on diffuse intrinsic pontine glioma, a severe brain cancer with poor prognosis, affecting about 300 patients annually in the U.S. [4]. Drug Development Challenges - The global pharmaceutical industry invested approximately $250 billion in drug development last year, with a 90% failure rate, largely due to toxicity issues [5]. - Targeted drug delivery via micro-robots can address the challenge of determining effective treatment dosages [5][6]. Technological Innovations - The development of micro-robots has evolved over 20 years, moving from simple designs to complex intelligent systems inspired by natural organisms [5][6]. - The use of electromagnetic fields to control micro-robots allows for precise movement within the human body [7][11]. Remote Surgery Potential - Remote surgery can significantly reduce the time patients spend traveling to treatment centers, which is critical for conditions like stroke where timely intervention is essential [10][11]. - The technology enables real-time observation and control of surgical procedures from thousands of kilometers away, enhancing access to specialized care [12][13]. Clinical Applications and Collaborations - Successful collaborations in Hong Kong have demonstrated the feasibility of remote surgeries for various conditions, showcasing the potential for widespread application [15]. - The article emphasizes the importance of remote medical services in addressing the needs of patients who cannot access timely surgical interventions [14][16]. Future Directions - The ongoing research aims to further develop micro-robotic technologies and integrate them into clinical practice, potentially revolutionizing surgical procedures and patient care [16].