Heavy metal detecting device and the fabricating method thereof

Abstract

The present invention provides a heavy metal detecting device and the fabricating method thereof. The heavy metal detecting device comprises a substrate and a nano-metal-particle array. The fabricating method of the heavy metal detecting device comprises following steps of: (S 1 ) preparing a substrate, cleaning the substrate with a first liquid, and drying the substrate with a first gas; (S 2 ) soaking the substrate in a first solution; (S 3 ) after soaking the substrate for a first period of time, cleaning and drying the substrate with the first liquid and the first gas respectively; (S 4 ) soaking the substrate in a pre-synthesized nano-metal-particle solution; and (S 5 ) after soaking the substrate for a second period of time, cleaning and drying the substrate with a second liquid and the first gas respectively. Compared to the prior arts, the heavy metal detecting device of the present invention has the advantages of simplicity and rapidity.

What is claimed is: 
     
         1 . A heavy metal detecting device, for detecting the concentration of a heavy mental ion in an analyte, comprising:
 a substrate; and   a nano-metal-particle array, comprising nano-metal-particles, a nano-metal-particle array disposed on the substrate;   wherein when the analyte contacts with the heavy metal detecting device, the heavy mental ion of the analyte reacts with the nano-metal-particle, and the user is able to observe the color-change on the surface of the heavy metal detecting device to detect the concentration of the heavy metal ion.   
     
     
         2 . The heavy metal detecting device of  claim 1 , wherein the substrate is a nonconductive substrate, the nonconductive substrate is made of polyethylene, polystyrene, polyethylene terephthalate, polycarbonate, polyetheretherketone or polytetrafluoroethene. 
     
     
         3 . The heavy metal detecting device of  claim 1 , wherein the substrate is able to be a conductive substrate, the conductive substrate is made of Fe, Ti, Au, Ag, Cu, Ni, Pt, Pd, Al or stainless steel. 
     
     
         4 . The heavy metal detecting device of  claim 1 , wherein the nano-metal-particle is able to be SNP, AuNP or HGN. 
     
     
         5 . The heavy metal detecting device of  claim 1 , wherein the form of the nano-metal-particle is sphere, rod, square, line, plate, and the size of the nano-metal-particle ranges from 1 nm to 200 nm. 
     
     
         6 . A fabricating method for the heavy metal detecting device, comprising the following steps of:
 (S 1 ) preparing a substrate, cleaning the substrate with a first liquid, and drying the substrate with a first gas;   (S 2 ) soaking the substrate in a first solution;   (S 3 ) after soaking the substrate for a first period of time, cleaning and drying the substrate with the first liquid and the first gas respectively;   (S 4 ) soaking the substrate in a pre-synthesized nano-metal-particle solution; and   (S 5 ) after soaking the substrate for a second period of time, cleaning and drying the substrate with a second liquid and the first gas respectively;   wherein a process of the heavy metal detecting device is done after finishing all of the steps mentioned above.   
     
     
         7 . The fabricating method for the heavy metal detecting device of  claim 6 , wherein the substrate is able to be a conductive substrate, and the conductive substrate is made of Fe, Ti, Au, Ag, Cu, Ni, Pt, Pd, Al or stainless steel. 
     
     
         8 . The fabricating method of the heavy metal detecting device of  claim 6 , wherein the first liquid is able to be ethanol, the second liquid is able to be pure water, the first gas is able to be nitrogen and the first solution is able to be a liquid with silane molecules. 
     
     
         9 . The fabricating method for the heavy metal detecting device of  claim 6 , wherein the substrate is a nonconductive substrate, and the nonconductive substrate is made of polyethylene, polystyrene, polyethylene terephthalate, polycarbonate, polyetheretherketone or polytetrafluoroethene. 
     
     
         10 . The heavy metal detecting device of  claim 6 , wherein the nano-metal-particle is able to be SNP, AuNP or HGN, the form of the nano-metal-particle is sphere, rod, square, line, plate, and the size of the nano-metal-particle ranges from 1 nm to 200 nm.