Method for fabrication of non-spherical/asymmetric fine particles by using glass-coated metal wires
AssigneeUniversity-Industry Cooperation Group of Kyung Hee University
InventorsWook Park, Suk Heung Song
Life of this patent
Estimating the term…
Abstract
Disclosed are: a method capable of preparing, in large-scaled quantity, nonspherical/asymmetric fine particles in which the physical factors (for example, size, shape, structure, etc.) of a fine wire (for example, glass-coated metal microwires) are controlled, through a convergence of nano technology (NT) and laser machining technology; and a use thereof applicable to various fields including bioassay and security.
Claims21
A method for production of non-spherical/asymmetric fine particles, the method comprising the steps of:
- filling a glass tube with a metal;
- drawing the metal-filled glass tube while melting a lower portion of the glass tube by heating;
- cooling the drawn melt to form at least one glass-coated metal microwire;
- positioning the at least one glass-coated metal microwire in at least one of a plurality of grooves arranged in a width direction on a wire holder;
- and
- cutting the at least one glass-coated metal microwire positioned on the wire holder, in a traverse direction at a predetermined distance in a non-contact machining process using a laser having a pulse width shorter than the heat propagation time of the at least one glass-coated metal microwire to produce non-spherical/asymmetric fine particles, wherein the total diameter of the at least one glass-coated metal microwire ranges from 50 to 200 μm, and wherein the aspect ratio of nonspherical/asymmetric fine particles ranges from 2 to 15.
A method for production of non-spherical/asymmetric fine particles, the method comprising the steps of:
- melting a metal by heating while separately heating a glass material to a temperature at which the glass material is drawable;
- drawing the heated glass material while loading the melted metal to an inside of the glass material;
- cooling the melted metal-loaded, drawn glass material to form at least one glass-coated metal microwire;
- positioning the at least one glass-coated metal microwire in at least one of a plurality of grooves arranged in a width direction on a wire holder;
- and
- cutting the at least one glass-coated metal microwire positioned on the wire holder, in a traverse direction at predetermined distance gaps in a non-contact machining process using a laser having a pulse width shorter than the heat propagation time of the at least one glass-coated metal microwire to produce non-spherical/asymmetric fine particles, wherein the total diameter of the at least one glass-coated metal microwire ranges from 50 to 200 μm, and wherein the aspect ratio of nonspherical/asymmetric fine particles ranges from 2 to 15.
A method for production of non-spherical/asymmetric fine particles, the method comprising the steps of:
- dispersing metal powder in an ultraviolet light-curable compound to prepare a flowable metal dispersion and separately, drawing a glass tube into a glass wire while heating the glass tube;
- loading the flowable metal dispersion into the drawn glass wire;
- exposing the flowable metal dispersion-loaded, drawn glass wire to ultraviolet light to cure the ultraviolet-curable compound in the flowable metal dispersion, thus forming at least one glass-coated metal microwire;
- positioning the at least one glass-coated metal microwire in at least one of a plurality of grooves arranged in a width direction on a wire holder;
- and
- cutting the at least one glass-coated metal microwire positioned on the wire holder, in a traverse direction at predetermined distance gaps in a non-contact machining process using a laser having a pulse width shorter than the heat propagation time of the at least one glass-coated metal microwire to produce non-spherical/asymmetric fine particles, wherein the total diameter of the at least one glass-coated metal microwire ranges from 50 to 200 μm, and wherein the aspect ratio of nonspherical/asymmetric fine particles ranges from 2 to 15.
Dependencies are inferred from the claim text.