材料科学                        
                
                                
                        
                            墨水池                        
                
                                
                        
                            碳纳米管                        
                
                                
                        
                            电容感应                        
                
                                
                        
                            聚二甲基硅氧烷                        
                
                                
                        
                            压力传感器                        
                
                                
                        
                            电介质                        
                
                                
                        
                            纳米技术                        
                
                                
                        
                            光电子学                        
                
                                
                        
                            复合材料                        
                
                                
                        
                            电气工程                        
                
                                
                        
                            机械工程                        
                
                                
                        
                            工程类                        
                
                        
                    
            作者
            
                Lantian Liu,Lixin Mo,Shaobo Han,Xiaoqing Liu,Jingyao Sun,Zhaojun Han,Zhaoyong Sun,Mo Geng,H. B. Hu,Jingke Zhang,Haoyou Zhang,Zhiqing Xin,Kun Hu,Haomiao Li            
         
                    
        
    
            
            标识
            
                                    DOI:10.1002/adfm.202514093
                                    
                                
                                 
         
        
                
            摘要
            
            Abstract Flexible capacitive pressure sensors are crucial for applications in electronic skin, artificial intelligence, and wearable medical devices. Despite their potential, conventional sensors often suffer from low pressure sensitivity, particularly in high‐pressure environments, and complex microstructure construction methods. This study addresses these limitations by developing a novel flexible capacitive pressure sensor based on a composite dielectric layer consisting of carbon nanotubes (CNTs), thermally expandable microspheres (TEMs), and polydimethylsiloxane (PDMS), with a 3D direct ink writing (DIW) technology. The CNTs‐TEMs synergy modulates both mechanical and dielectric response in capacitive sensors, achieving a two‐order‐of‐magnitude enhancement in sensitivity compared to that of CNT‐only filler system. The groove‐like microstructure on the surface of the dielectric layer enables rapid and stable air expulsion to boost dielectric constant change and sensitivity under pressure. The proposed sensor exhibits a maximal sensitivity as high as 3.09 kPa −1 in the wide pressure range of 0–500 kPa, and a detection limit as low as 16.7 Pa. Furthermore, the sensor shows excellent pressure resolution of 0.3%, cycling stability over 40 000 cycles, and can accurately monitor various human activities, demonstrating its potential for applications in health monitoring and flexible electronics.
         
            
 
                 
                
                    
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