Abstract:
PURPOSE: A method for detecting biomolecules and a sensor using nanoparticle enrichment are provided to effectively detect mass change. CONSTITUTION: A method for detecting biomolecule binding comprises: a step of reacting a target biomolecule to a sensor for detecting mass change according to the target biomolecule binding; a step of binding the target biomolecule with optical catalyst nanoparticles; and a step of irradiating light to the optical catalyst nanoparticles to enhance mass. The optical catalyst nanoparticle promotes oxidation-reduction of metal ion. The light is UV ray or visible ray. The metal ion is silver ion, copper ion, gold ion, or palladium ion. The sensor is surface acoustic wave sensor, or surface Plasmon resonance(SPR).
Abstract:
PURPOSE: A biosensor using the aggregation of magnetic nanoparticles and a detecting method using the same are provided to quickly and sensitively detect a target material. CONSTITUTION: A biosensor comprises: a substrate(100) with a receptor(200) which specifically reacts with a target material(300); a first magnetic nanoparticle(400) with the same receptor; a magnetic field supply unit which applies a magnetic field to the first magnetic nanoparticle; and a second magnetic particle(600) which aggregates with the first magnetic nanoparticle. The target material is an enzyme substrate, a ligand, an antigen, an antibody, a nucleotide, an amino acid, a peptide, a protein, a nucleic acid, lipid, carbohydrate, an organic compound, or an inorganic compound. The first and second magnetic nanoparticles are independently a ferromagnetic or paramagnetic nanoparticle.
Abstract:
PURPOSE: A mass reinforcing method of gold nano-particles due to light irradiation, a biosensor, and biomolecule combining detection method using the same are provided to reinforce mass of the gold nano-particles by using an optical irradiation method. CONSTITUTION: A mass reinforcing method of gold nano-particles due to light irradiation comprises the following steps: irradiating a mixture including gold nano-particles(13) and reinforcing metal component(15) with light; and increasing the mass of the gold nano-particles by reducing thereof on the surface of the gold nano-particles. The light is ultraviolet ray. The metal reinforcing component is metallic ion. A bio molecular combining detection method comprises the following steps: reacting target bio molecular with bio sensors which detect physical property changes according to bondage of the target bio molecular; combining the gold nano-particle to the target bio molecular; dipping the bio sensor into a mixture which includes the metal reinforcing components and irradiating light; and detecting physical property change of the gold nano-particles.
Abstract:
PURPOSE: A polymer measuring method using a micro cantilever is provided to measure very minute sample and facilitate controlling temperature and measure the large amount of the sample rapidly by measuring lots of samples at once. CONSTITUTION: A polymer measuring method using a micro cantilever comprises following steps. A micro cantilever array equipped with cantilevers is mounted on a flow stage. The length of the cantilever is 500 micron, and the breadth is 100 micron, and the thickness is 1 micron. A heater and a thermocouple are mounted on the array. The temperature is adjusted by attaching a heater controller. A helium-neon laser apparatus is attached and the bending degree of the cantilever is measured by the deflection.
Abstract:
A formaldehyde sensor using a piezo-resistive cantilever is provided to predict sick house syndrome in advance by selectively detecting formaldehyde for preparing against the sick house syndrome. A formaldehyde sensor using a piezo-resistive cantilever includes a cantilever(1), a gold coating film(6), and a mercaptophenol. The cantilever is fixed on a measurement chip(2) and includes a piezo-resistive unit(3). A wheatston bridge is embedded in the measurement chip. The piezo-resistive unit is R1 of the wheatston bridge being connected with R2, R3, and R4 through an electrical connector(5), is dopped and inserted in an upper part of a central shaft, and is folded with the cantilever when the cantilever is folded. The gold coating film is formed on an upper surface of the cantilever for sticking the mercaptophenol thereon. The mercaptophenol detects formaldehyde.