Abstract: A method for creating colorful patterns on a metal surface by using colorless ink is revealed. First carry out a first anodizing process on a metal substrate to form a first anodic oxide layer on a surface of the metal substrate. Then coat a layer of colorless ink on the first anodic oxide layer on the surface of the metal substrate to form a colorless ink pattern mask. Later perform a second anodizing process to form a second anodic oxide layer on a part of the metal substrate without being covered with the colorless ink pattern mask. Next remove the colorless ink pattern mask and coat a metal film over the first anodic oxide layer and the second anodic oxide layer to get a colorful pattern on the metal substrate.

Abstract: An invisible ink and a method of making the same are revealed. The invisible ink includes anodic aluminum oxide (AAO) powder and at least one solvent. The method of making the invisible ink includes the steps of taking an aluminum substrate and carrying out anodic oxidation on the aluminum substrate at least once to form an anodic aluminum oxide (AAO) layer on a surface of the aluminum substrate, separating the AAO layer from the aluminum substrate and pulverizing the separated AAO layer to get AAO powder, and adding the AAO powder into a solvent to obtain the invisible ink.

Abstract: An image sensor may include a polydimethylsiloxane (PDMS) layer that is subwavelength, hydrophobic, and/or antireflective. The PDMS layer may be fabricated to include a surface having a plurality of nanostructures (e.g., an array of convex protuberances and/or an array of concave recesses). The nanostructures may be formed through the use of a porous anodic aluminum oxide (AAO) template that uses a plurality of nanopores to form the array of convex protuberances and/or the array of concave recesses. The nanostructures may each have a respective width that is less than the wavelength of incident light that is to be collected by the image sensor to increase light absorption by increasing the angle of incidence for which the image sensor is capable of collecting incident light. This may increase the quantum efficiency of the image sensor and may increase the sensitivity of the image sensor.

Abstract: A method for creating colorful patterns on a metal surface by using colorless ink is revealed. First carry out a first anodizing process on a metal substrate to form a first anodic oxide layer on a surface of the metal substrate. Then coat a layer of colorless ink on the first anodic oxide layer on the surface of the metal substrate to form a colorless ink pattern mask. Later perform a second anodizing process to form a second anodic oxide layer on a part of the metal substrate without being covered with the colorless ink pattern mask. Next remove the colorless ink pattern mask and coat a metal film over the first anodic oxide layer and the second anodic oxide layer to get a colorful pattern on the metal substrate.

Abstract: An image sensor may include a polydimethylsiloxane (PDMS) layer that is subwavelength, hydrophobic, and/or antireflective. The PDMS layer may be fabricated to include a surface having a plurality of nanostructures (e.g., an array of convex protuberances and/or an array of concave recesses). The nanostructures may be formed through the use of a porous anodic aluminum oxide (AAO) template that uses a plurality of nanopores to form the array of convex protuberances and/or the array of concave recesses. The nanostructures may each have a respective width that is less than the wavelength of incident light that is to be collected by the image sensor to increase light absorption by increasing the angle of incidence for which the image sensor is capable of collecting incident light. This may increase the quantum efficiency of the image sensor and may increase the sensitivity of the image sensor.

Abstract: An image sensor may include a polydimethylsiloxane (PDMS) layer that is subwavelength, hydrophobic, and/or antireflective. The PDMS layer may be fabricated to include a surface having a plurality of nanostructures (e.g., an array of convex protuberances and/or an array of concave recesses). The nanostructures may be formed through the use of a porous anodic aluminum oxide (AAO) template that uses a plurality of nanopores to form the array of convex protuberances and/or the array of concave recesses. The nanostructures may each have a respective width that is less than the wavelength of incident light that is to be collected by the image sensor to increase light absorption by increasing the angle of incidence for which the image sensor is capable of collecting incident light. This may increase the quantum efficiency of the image sensor and may increase the sensitivity of the image sensor.

Abstract: The present invention discloses a using method of a rewritable board. It comprises applying or removing a fluid on the rewritable board for writing repeatedly, wherein the rewritable board is an aluminum based material sequentially having a porous aluminum oxide layer and a metal layer thereon, and wherein the porous aluminum oxide layer has a porosity ranging from 10% to 80%.

Abstract: The present invention discloses a using method of a rewritable board. It comprises applying or removing a fluid on the rewritable board for writing repeatedly, wherein the rewritable board is an aluminum based material sequentially having a porous aluminum oxide layer and a metal layer thereon, and wherein the porous aluminum oxide layer has a porosity ranging from 10% to 80%.

Abstract: A method for preparing invisible anodic aluminum oxide (AAO) patterns is revealed. The method includes a plurality of steps. First take an aluminum substrate. Then anodize the aluminum substrate for the first time to get a first anodic aluminum oxide (AAO). Next perform photolithography so that a photoresist forms a pattern on the aluminum substrate with the first AAO. Lastly anodize the aluminum substrate for the second time so that a second AAO is formed on the pattern and the pattern becomes invisible.

Abstract: A method for preparing invisible anodic aluminum oxide (AAO) patterns is revealed. The method includes a plurality of steps. First take an aluminum substrate. Then anodize the aluminum substrate for the first time to get a first anodic aluminum oxide (AAO). Next perform photolithography so that a photoresist forms a pattern on the aluminum substrate with the first AAO. Lastly anodize the aluminum substrate for the second time so that a second AAO is formed on the pattern and the pattern becomes invisible.

Abstract: A method for dye-free coloring of one-time anodic aluminum oxide surface is revealed. First provide a substrate containing aluminum. The substrate containing aluminum is anodized once at room temperature. The anodizing process includes a step of applying a pulse signal on the substrate containing aluminum for a first period of time. Thus a porous aluminum oxide layer is formed on surface of the substrate containing aluminum. The pulse signal includes a part with positive voltage and a part with negative voltage. Then a metal layer is deposited on the surface of the porous aluminum oxide layer. The porous aluminum oxide layer has a first interference wavelength. Next perform a linear regression of the first interference wavelength versus the first period of time. The absolute value of the slope of the regression line obtained ranges from 1.8 to 38.5. The absolute value is positively correlated with the positive voltage.

Abstract: A method for dye-free coloring of one-time anodic aluminum oxide surface is revealed. First provide a substrate containing aluminum. The substrate containing aluminum is anodized once at room temperature. The anodizing process includes a step of applying a pulse signal on the substrate containing aluminum for a first period of time. Thus a porous aluminum oxide layer is formed on surface of the substrate containing aluminum. The pulse signal includes a part with positive voltage and a part with negative voltage. Then a metal layer is deposited on the surface of the porous aluminum oxide layer. The porous aluminum oxide layer has a first interference wavelength. Next perform a linear regression of the first interference wavelength versus the first period of time. The absolute value of the slope of the regression line obtained ranges from 1.8 to 38.5. The absolute value is positively correlated with the positive voltage.

Abstract: A method for separating charged particles in a liquid sample is disclosed. The method includes the steps of driving the liquid sample containing a plurality of charged particles to flow, forming a non-uniform electric field in the direction relative to the flow direction of the liquid sample by two electrodes, and aggregating the charged particles under the non-uniform electric field so as to separating the charged particles from the liquid sample. When the liquid sample flows through the non-uniform electric field, it doesn't contact to the electrodes. A device and its manufacturing method for separating charged particles in a liquid sample are also disclosed. Accordingly, the charged particles can be separated from the liquid sample easily and more effectively.

Abstract: The present invention relates to a CO2 laser-transparent material having a mark on the surface thereof and the method for making the same. The method includes the following steps: providing a first substrate, which has a top surface and a bottom surface; providing a second substrate which has a top surface; putting the bottom surface of the first substrate on the top surface of the second substrate; irradiating a CO2 laser beam to the top surface of the second substrate by passing through the top surface and the bottom surface of the first substrate; and forming a mark on the bottom surface of the first substrate. The material of the mark is oxide of the second substrate or the same as the material of the second substrate. Whereby the cheap CO2 laser is utilized to form the mark on the first substrate, and the mark can be erased easily by a proper chemical for recycling the first substrate.

Abstract: The present invention relates to a CO2 laser-transparent material having a mark on the surface thereof and the method for making the same. The method includes the following steps: providing a first substrate, which has a top surface and a bottom surface; providing a second substrate which has a top surface; putting the bottom surface of the first substrate on the top surface of the second substrate; irradiating a CO2 laser beam to the top surface of the second substrate by passing through the top surface and the bottom surface of the first substrate; and forming a mark on the bottom surface of the first substrate. The material of the mark is oxide of the second substrate or the same as the material of the second substrate. Whereby the cheap CO2 laser is utilized to form the mark on the first substrate, and the mark can be erased easily by a proper chemical for recycling the first substrate.

Abstract: The present invention relates to a CO2 laser-transparent material having a mark on the surface thereof and the method for making the same. The method includes the following steps: providing a first substrate, which has a top surface and a bottom surface; providing a second substrate which has a top surface; putting the bottom surface of the first substrate on the top surface of the second substrate; irradiating a CO2 laser beam to the top surface of the second substrate by passing through the top surface and the bottom surface of the first substrate; and forming a mark on the bottom surface of the first substrate. The material of the mark is oxide of the second substrate or the same as the material of the second substrate. Whereby the cheap CO2 laser is utilized to form the mark on the first substrate, and the mark can be erased easily by a proper chemical for recycling the first substrate.

Abstract: A method for separating charged particles in a liquid sample is disclosed. The method includes the steps of driving the liquid sample containing a plurality of charged particles to flow, forming a non-uniform electric field in the direction relative to the flow direction of the liquid sample by two electrodes, and aggregating the charged particles under the non-uniform electric field so as to separating the charged particles from the liquid sample. When the liquid sample flows through the non-uniform electric field, it doesn't contact to the electrodes. A device and its manufacturing method for separating charged particles in a liquid sample are also disclosed, Accordingly, the charged particles can be separated from the liquid sample easily and more effectively.

Abstract: A method for manufacturing a flexible optical plate includes steps of: (A) positioning a metallic mask on a surface of a mother substrate; (B) irradiating a carbon dioxide laser beam through the metallic mask to form cavities on the surface of the mother substrate; (C) coating a polymer material on the surface of the mother substrate to fill the cavities; and (D) drying the coated polymer material to form the flexible optical plate, the flexible optical plate having a substrate on the surface of the mother substrate and microstructures protruding from the substrate and each corresponding to one of the cavities.

Abstract: A method for manufacturing a flexible optical plate includes steps of: (A) positioning a metallic mask on a surface of a mother substrate; (B) irradiating a carbon dioxide laser beam through the metallic mask to form cavities on the surface of the mother substrate; (C) coating a polymer material on the surface of the mother substrate to fill the cavities; and (D) drying the coated polymer material to form the flexible optical plate, the flexible optical plate having a substrate on the surface of the mother substrate and microstructures protruding from the substrate and each corresponding to one of the cavities.

Abstract: In a biomedical chip for blood coagulation tests and its manufacturing method and use, the biomedical chip comprises a substrate layer, a middle layer, and a cap layer, engaged and stacked with each other to define a microfluidic channel which has a first inlet and an outlet of the microfluidic channel respectively. A mixing interval is expanded outward from the microfluidic channel and interconnected to a second inlet, and has an interconnect portion and a capillary portion disposed between the substrate layer and the cap layer, and more specifically disposed around the periphery of the interconnect portion. With the biomedical chip having the substrate layer and cap layer made of a hydrophilic material, the blood and the reagent can be driven automatically by the capillary force of the microfluidic channel to flow and mix with each other, and the hydrophilic capillary force can be permanently maintained.