One of the fundamental principles of electrostatics is that an uncharged object will be attracted to a charged object through electrostatic induction as the two approaches one another.We refer to the charged object as...One of the fundamental principles of electrostatics is that an uncharged object will be attracted to a charged object through electrostatic induction as the two approaches one another.We refer to the charged object as a single electrode and examine the scenario where a positive voltage is applied.Because of electrostatic induction phenomenon,single-electrode electrostatics only generates electrostatic attraction forces.Here,we discover that single-electrode electrostatics can generate electrostatic repulsion forces and define this new phenomenon as single-electrode electrostatic repulsion phenomenon.We investigate the fundamental electrostatic phenomena,giving a curve of electrostatic force versus voltage and then defining 3 regions.Remote actuation and manipulation are essential technologies that are of enormous concern,with tweezers playing an important role.Various tweezers designed on the basis of external fields of optics,acoustics,and magnetism can be used for remote actuation and manipulation,but some inherent drawbacks still exist.Tweezers would benefit greatly from our discovery in electrostatics.On the basis of this discovery,we propose the concept of electrostatic tweezers,which can achieve noncontact and remote actuation and manipulation.Experimental characterizations and successful applications in metamaterials,robots,and manipulating objects demonstrated that electrostatic tweezers can produce large deformation rates(>6,000%),fast actuation(>100 Hz),and remote manipulating distance(~15 cm)and have the advantages of simple device structure,easy control,lightweight,no dielectric breakdown,and low cost.Our work may deepen people's understanding of single-electrode electrostatics and opens new opportunities for remote actuation and manipulation.展开更多
Paper-based generators are essential elements for building all paper-based systems. To obtain robust paper-based generators with outstanding high power outputs, this paper introduced a new type of double- folding pape...Paper-based generators are essential elements for building all paper-based systems. To obtain robust paper-based generators with outstanding high power outputs, this paper introduced a new type of double- folding paper-based generator by folding two paper components together. The output performance levels of the double-folding generator were twice higher than that of the single-folding and parallel-plate generators. A peak power of-3.24 mW was achieved under a stimulating frequency of 3 Hz. Furthermore, 47 light-emitting diodes （LEDs） were lit directly by a double-folding paper-based generator assembled to the crack of a door that opens and closes. This finding indicated the potential applications of the double-folding generator in the production of door ornaments or for security in places where doors frequently open and close.展开更多
基金supported by International Cooperation Program of the Natural Science Foundation of China under grant no.52261135542(to J.Z.)National Natural Science Foundation of China under grant no.52305074(to W.T.)+2 种基金Zhejiang Provincial Natural Science Foundation of China under grant no.LD22E050002(to J.Z.)China National Postdoctoral Program for Innovative Talents under grant no.BX20220267(to W.T.)the China Postdoctoral Science Foundation under grant no.2023M733066(to W.T.).
文摘One of the fundamental principles of electrostatics is that an uncharged object will be attracted to a charged object through electrostatic induction as the two approaches one another.We refer to the charged object as a single electrode and examine the scenario where a positive voltage is applied.Because of electrostatic induction phenomenon,single-electrode electrostatics only generates electrostatic attraction forces.Here,we discover that single-electrode electrostatics can generate electrostatic repulsion forces and define this new phenomenon as single-electrode electrostatic repulsion phenomenon.We investigate the fundamental electrostatic phenomena,giving a curve of electrostatic force versus voltage and then defining 3 regions.Remote actuation and manipulation are essential technologies that are of enormous concern,with tweezers playing an important role.Various tweezers designed on the basis of external fields of optics,acoustics,and magnetism can be used for remote actuation and manipulation,but some inherent drawbacks still exist.Tweezers would benefit greatly from our discovery in electrostatics.On the basis of this discovery,we propose the concept of electrostatic tweezers,which can achieve noncontact and remote actuation and manipulation.Experimental characterizations and successful applications in metamaterials,robots,and manipulating objects demonstrated that electrostatic tweezers can produce large deformation rates(>6,000%),fast actuation(>100 Hz),and remote manipulating distance(~15 cm)and have the advantages of simple device structure,easy control,lightweight,no dielectric breakdown,and low cost.Our work may deepen people's understanding of single-electrode electrostatics and opens new opportunities for remote actuation and manipulation.
文摘Paper-based generators are essential elements for building all paper-based systems. To obtain robust paper-based generators with outstanding high power outputs, this paper introduced a new type of double- folding paper-based generator by folding two paper components together. The output performance levels of the double-folding generator were twice higher than that of the single-folding and parallel-plate generators. A peak power of-3.24 mW was achieved under a stimulating frequency of 3 Hz. Furthermore, 47 light-emitting diodes （LEDs） were lit directly by a double-folding paper-based generator assembled to the crack of a door that opens and closes. This finding indicated the potential applications of the double-folding generator in the production of door ornaments or for security in places where doors frequently open and close.
