Abstract: The present disclosure relates to a hydrogen sensor and a method for manufacturing the same, and more particularly, to a hydrogen sensor having a vertical nanogap structure, in which a nanogap is formed below a sensor portion to bring the sensor portion and an electrode into contact with each other when the sensor portion reacts with hydrogen, so as to allow the sensor portion to expand and contract freely without resistance on a substrate, thereby improving hydrogen sensing accuracy, and it is possible to form a precise nanogap with uniformity and reproducibility at a low cost and a method for manufacturing the same.

Abstract: The disclosure relates to a hydrogen sensing device capable of visually detecting the presence of hydrogen through a color change according to a water-forming reaction by inducing the water-forming reaction between hydrogen and oxygen at the interface between a lower metal layer and a dielectric layer under a structure in which a lower metal layer, a dielectric layer, and an upper metal layer are sequentially stacked, and visually sensing the color change caused by the generated water.

Abstract: A photodetector for detecting deep ultra-violet light includes a substrate; first and second electrodes separated by a channel; and colloidal MnO based quantum dots formed in the channel. The colloidal MnO based quantum dots are sensitive to ultra-violet light having a wavelength lower than 300 nm.

Abstract: Methods, apparatuses, and systems are provided for using laser ablation to manufacture nanoparticles. An example method includes steps of generating, by a laser beam generator, a laser beam, splitting, by a set of beam splitters, the laser beam into a plurality of derivative laser beams, and directing each derivative laser beam towards a plurality of targets. In this example method, the plurality of targets are submerged in corresponding synthesis solvents within corresponding synthesis chambers. Moreover, interaction of each derivative laser beam with its corresponding target releases nanoparticles into the corresponding synthesis solvent to create a nanoparticle solution including both the corresponding synthesis solvent and the released nanoparticles.

Abstract: A photodetector for detecting deep ultra-violet light includes a substrate; first and second electrodes separated by a channel; and colloidal MnO based quantum dots formed in the channel. The colloidal MnO based quantum dots are sensitive to ultra-violet light having a wavelength lower than 300 nm.

Abstract: A method for forming CsPbBr3 perovskite nanocrystals into a two-dimensional (2D) nanosheet includes providing CsPbBr3 perovskite nanocrystals; mixing the CsPbBr3 perovskite nanocrystals into a mixture of a first solvent and a second solvent, to form a solution of the CsPbBr3 perovskite nanocrystals, the first solvent, and the second solvent; and forming an optoelectronic device by patterning the CsPbBr3 perovskite nanocrystals into a nanosheet, between first and second electrodes. The first solvent is selected to evaporate before the second solvent.

Abstract: The present disclosure relates to a hydrogen sensor and a method for manufacturing the same, and more particularly, to a hydrogen sensor having a vertical nanogap structure, in which a nanogap is formed below a sensor portion to bring the sensor portion and an electrode into contact with each other when the sensor portion reacts with hydrogen, so as to allow the sensor portion to expand and contract freely without resistance on a substrate, thereby improving hydrogen sensing accuracy, and it is possible to form a precise nanogap with uniformity and reproducibility at a low cost and a method for manufacturing the same.

Abstract: The present invention provides a method of manufacturing a hydrogen sensor and a hydrogen sensor manufactured thereby. Specifically, the method according to the present invention includes a step of forming a self-assembled single layer on a stamp substrate provided with nanoline-patterned uneven parts; a step of depositing a metal thin film layer on the self-assembled single layer; a step of disposing the stamp substrate on a flexible sensor substrate so that a polymer layer formed on the sensor substrate and the metal thin film layer deposited on the uneven parts are brought into contact with each other; a step of transferring a metal nanoribbon array having nanogaps to the sensor substrate by performing pressure and heat treatment on the stamp substrate and removing the stamp substrate; and a step of forming first and second electrodes on both ends of the transferred metal nanoribbon array.

Abstract: Methods, apparatuses, and systems are provided for using laser ablation to manufacture nanoparticles. An example method includes steps of generating, by a laser beam generator, a laser beam, splitting, by a set of beam splitters, the laser beam into a plurality of derivative laser beams, and directing each derivative laser beam towards a plurality of targets. In this example method, the plurality of targets are submerged in corresponding synthesis solvents within corresponding synthesis chambers. Moreover, interaction of each derivative laser beam with its corresponding target releases nanoparticles into the corresponding synthesis solvent to create a nanoparticle solution including both the corresponding synthesis solvent and the released nanoparticles.

Abstract: The present invention provides a method of manufacturing a hydrogen sensor and a hydrogen sensor manufactured thereby. Specifically, the method according to the present invention includes a step of forming a self-assembled single layer on a stamp substrate provided with nanoline-patterned uneven parts; a step of depositing a metal thin film layer on the self-assembled single layer; a step of disposing the stamp substrate on a flexible sensor substrate so that a polymer layer formed on the sensor substrate and the metal thin film layer deposited on the uneven parts are brought into contact with each other; a step of transferring a metal nanoribbon array having nanogaps to the sensor substrate by performing pressure and heat treatment on the stamp substrate and removing the stamp substrate; and a step of forming first and second electrodes on both ends of the transferred metal nanoribbon array.

Abstract: Disclosed herein are a method of manufacturing large area graphene nanoribbons, which have no residual layer by interposing a chromium layer between a resist layer and a graphene layer, and a sensor including the graphene nanoribbons.

Abstract: Disclosed herein are a method of manufacturing large area graphene nanoribbons, which have no residual layer by interposing a chromium layer between a resist layer and a graphene layer, and a sensor including the graphene nanoribbons.