Abstract: Disclosed are a conductive polymer substrate and a method for manufacturing the same, wherein the conductive polymer substrate has improved cell alignment, maturity, adhesion, and connectivity by having nanopatterns on a surface thereof while having electric conductivity through embedded silver nanowires (AgNWs).

Abstract: A method of forming nanoparticles having superhydrophobicity includes preparing a PDMS film including a structure having a predetermined shape on a surface thereof, and generating the nanoparticles having superhydrophobicity on the surface of the PDMS film by combusting the surface of the PDMS film using a diffusion flame. Transparent nanoparticles having superhydrophobicity and oleophobicity may be generated simply and easily on the surface of the PDMS film.

Abstract: A method of forming nanoparticles having superhydrophobicity includes preparing a PDMS film including a structure having a predetermined shape on a surface thereof, and generating the nanoparticles having superhydrophobicity on the surface of the PDMS film by combusting the surface of the PDMS film using a diffusion flame. Transparent nanoparticles having superhydrophobicity and oleophobicity may be generated simply and easily on the surface of the PDMS film.

Abstract: A stretchable circuit board has stretchability as well as flexibility of the flexible substrate and retains mechanical and electrical properties even under larger deformation such as bending, twisting, etc. The liquid metal pattern can exhibit stretchability almost the same as that of the polymer substrate due to the liquid metal being fully wetted on the substrate with metal patterns based on the wetting behavior of the liquid metal. Therefore, the stretchable circuit board can achieve both mechanical and electrical properties even under physical deformation such as bending, stretching and twisting. It is demonstrated that the stretchable circuit board can be effectively applied to wearable tactile interfaces, stretchable solar cell arrays, stretchable displays, and wearable electronic devices.

Abstract: A stretchable circuit board has stretchability as well as flexibility of the flexible substrate and retains mechanical and electrical properties even under larger deformation such as bending, twisting, etc. The liquid metal pattern can exhibit stretchability almost to same to that of the polymer substrate due to that the liquid metal is fully wetted on the substrate with metal patterns based on the wetting behavior of the liquid metal. Therefore, the stretchable circuit board can achieve both mechanical and electrical properties even under physical deformation such as bending, stretching and twisting. It is demonstrated that the stretchable circuit board can be effectively applied to wearable tactile interfaces, stretchable solar cell arrays, stretchable displays, and wearable electronic devices.

Abstract: Disclosed is a radar signal clustering method using frequency modulation characteristics and combination characteristics of signals including: a first step of assigning pulses of received radar signals to cells consisting of parameters including radio frequency (RF) and angle of arrival (AOA) of the pulses; a second step of calculating a pulse density distribution of each cell using a kernel density estimator; a third step of extracting a corresponding cell as a frequency fixed cluster if the calculated pulse density distribution is greater than a threshold of the frequency fixed cluster; a fourth step of making cell groups by merging remaining cells that are not extracted as the frequency fixed clusters; a fifth step of calculating a pulse density distribution of each cell group by using the kernel density estimator for each cell group; and a sixth step of comparing the calculated pulse density distribution for each cell group with each threshold according to a signal combination type of frequency agile clus