TWI377270B - - Google Patents

Description

1377270 t, DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a method for producing a nanoparticle film, and more particularly to a method for producing a highly dense single-layer metal nanoparticle film. [Prior Art] * In recent years, due to the shortage of inorganic materials such as Shi Xi, the development of many scientific and technological applications has been limited. Therefore, the development of organic materials has become more active, but organic materials: performance is still far less than inorganic materials. Therefore, inorganic materials and organic materials (4) The application of the person becomes the most popular research at present. In addition, actively looking for other substitutes (the inorganic materials with better application efficiency are also worthy of research and development. Among the inorganic materials, gold (Au) is the most popular due to gold Chemical and physical release ^ and no biological toxicity 'so' is a scientist's interest (4) subject matter. Early research focused on the sexuality of gold in aqueous solution. In recent years, due to the discovery of gold particles After making the Chennai Spicy Film on the substrate = special optical properties, so the research results are like the film of the spring after the rain, the rice particle film produced by other kinds of metals can also pass through its nanometer The optical and material properties of the 芬, Fenla Mountain, 寸 座 将 将 9 9 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成 形成Some - Chennai This method includes the following steps: 卞 (4) 1 step transfer is to provide a clean substrate; handle 1 〇 2 is to provide a four gas gold acid solution, and through a specific treatment (four) The four-gas gold acid aqueous solution is made into an aqueous solution of gold nanoparticles, and the treatment procedure usually used for 1377270 is an aqueous phase synthesis method or a phase transfer method, and the two methods are carried out as follows: = aqueous phase synthesis method: The method comprises the steps of: adding a reduced flake/liquid mixture heated to a predetermined temperature to a four-gas gold acid aqueous solution heated to a predetermined temperature to form a mixed liquid, and continuously stirring at a constant temperature for a period of time, and then the mixed liquid The gold nanoparticle aqueous solution can be prepared by cooling in an environment of 20 C to 3 Torr, wherein the reducing agent in the reducing agent solution is a substance selected from the group consisting of citric acid and tannic acid. , sodium borohydride, quaternary ammonium salt, and trisodium citrate bismuth (2) phase transfer method: the method is to dissolve four gas gold acid in water, and the quaternary ammonium salt and n-dodecyl mercaptan Dissolved in a toluene solution, after mixing and stirring the above two solutions, Further, sodium borohydride is added to reduce the gold ion (III) in the tetrachloroauric acid solution to a gold atom, and further to form a gold nanoparticle and form an aqueous solution of the gold nanoparticle. At this time, the mercaptan in the organic phase It will adsorb on the surface of the formed gold nanoparticles to stabilize the nanoparticles, avoiding their aggregation and limiting the particle size. Step 103 is to immerse the substrate in the prepared aqueous solution of gold nanoparticles and borrow The size of the adsorption force between the substrate and the gold nanoparticles determines the bubble change time. Finally, the gold nanoparticles can be deposited on the substrate and form a gold nanoparticle film. Although the existing gold nanoparticle film The preparation method has the characteristics of producing a gold thin film material on the substrate 'but there are actually the following defects: 1. When preparing the gold nanoparticle film by the existing method, it must be prepared by aqueous phase synthesis or phase transfer method. After extracting the aqueous solution of the gold nanoparticles, the substrate is immersed in the prepared metal nanoparticle solution, and the gold nanoparticles are deposited on the substrate to form a Chennai green film. The crude sub-system Jinnai Mi ^ solution process complicated and time-consuming Jing, green sub-Nai existing metal film production method has more and more complicated manufacturing processes disadvantages. 82. Because the interaction between the general gold nanoparticles and the substrate is not strong, it is impossible to form a high-density nano-particle film on the substrate. When the density of the metal nanoparticles on the substrate is not high, The catalytic properties are not the same, and the application effect is lowered, so that the conventional metal nanoparticle film has a disadvantage that it is difficult to smoothly produce a high-density metal nanoparticle film. Third, because the nanoparticles are prone to self-aggregation (aggregati〇n), in order to avoid this, it is usually added to the metal nanoparticle solution to add molecular protection such as sodium citrate or thiol. The agent covers the nano particles to make the particles dispersed and not easy to aggregate. However, the protective agent having such a function has a large force on the particles, so it is relatively difficult to form a metal nanoparticle film after deposition. The removal of these protective agents from the surface of the metal nanoparticles affects the properties and applicability of the metal nanoparticle film. 4. The metal nanoparticle film produced by the existing method is easy to form a multi-layer type, and the multilayer metal nanoparticle film is easy to form agglomerated and disorderly arrangement state, and the photoelectric property of the metal nanoparticle film is also affected. Influence, while reducing its applicability. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a single layer metal of a single layer and high density metal nanoparticle film directly on a substrate by electrochemical deposition method which is relatively simple and inexpensive to manufacture. 5 method of nanoparticle film. Thus, the method for preparing the single-layer metal nanoparticle film of the present invention comprises the following steps: (1) providing a substrate modified with a decane-coupled molecule; (ii) preparing a metal electrolyte comprising a predetermined ratio of phases a metal compound component having a plurality of metal compounds respectively bonded with a predetermined metal ion; and (m) directly immersing the modified substrate in the metal electrolyte, and a surfactant component The metal ions in the metal compound component are reduced to metal nanoparticles by electrochemical deposition, and a metal nanoparticle film is deposited on the substrate. The invention has the beneficial effects that the metal nanoparticle film can be formed by directly immersing the substrate in the metal electrolyte solution by electrochemical deposition, and can be directly used by the surfactant in the metal electrolyte solution. The metal ions: the surface of the metal nanoparticles formed by the reduction form a molecular film to effectively prevent mutual aggregation, and the substrate modified with the decane coupling molecule is used to make the metal nanoparticles and the decane The formation of a stable covalent bond between the coupled molecules and the reduction of the bonding between the metal particles and the metal particles to form a metal particle having a larger particle diameter, thereby making it possible to produce a smaller particle size and a higher density. The high metal nanoparticle film enables the invention to produce a single-layer and high-density metal nanoparticle film by a relatively simple and low-cost electrochemical deposition method, so that the prepared metal film phase can be expressed. Better application performance with value for commercial applications. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to Figures 2 and 3, a preferred embodiment of the process for producing a single-layered metal nanoparticle film of the present invention comprises the following steps: Step 201 is to provide a substrate 31 modified with a decane-coupled molecule. Wherein one end of the decane-coupled molecule has a group selected from the group consisting of a thiol group (-SH) and an amino group (-NH3). In order to deposit a metal nanoparticle film having a higher density and a smaller particle diameter on the substrate, it is preferred to use a decane coupling type molecule having a thiol group. In the preferred embodiment, a thiol group is used. As the astaxantane I, the following is the following: OCH3 / ing 'och3 〇ch3 (^Mercaptopropyl^rimedioxysilane (MPTMS) The substrate 31 is selected to have electrical conductivity. The substrate of the nature. In this embodiment, the substrate has a conductive film made of a material selected from the group consisting of tin-doped indium oxide (ITO). Indium-doped zinc oxide (abbreviated as IZO), aluminum-doped zinc oxide (abbreviated as AZO), and gallium-doped zinc oxide (GZO). 1377270 Before the dance, the cleaning process and the removal of the oxide layer must be performed to make the substrate pass the 4 base end (·〇Η), so that the substrate can be smoothly coupled with the tantalum (4) slitting polymerization reaction. ” Step 2 〇 2疋Preparing a metal electrolyte 30 containing a metal compound component and a surfactant component mixed in a predetermined ratio. The metal compound has a plurality of predetermined metal ions combined with each other. The metal compound is such that the metal ions are formed of a metal selected from the group consisting of gold, silver, copper, ruthenium (Ru), ruthenium (tetra), iron, and the like. In a preferred embodiment, the metal ions are substantially gold ions' and the metal compounds in the metal compound component are tetragas gold acid (H(AuC14)). Step 203 is to modify the substrate 31. The metal electrolyte is directly immersed in the metal ruthenium, and the metal ions in the metal compound component are reduced to metal nanoparticles by electrochemical deposition, and a metal nanoparticle film is deposited on the substrate 31. Preferably, the electrochemical deposition method uses a three-electrode system formed by a working electrode Ο, an auxiliary electrode 42 and a reference electrode 43, and the working electrode 41 is coupled with the modified stone. class The substrate 3 of the molecule is connected, the auxiliary electrode 42 is a platinum wire, and the reference electrode is silver/silver chloride (Ag/AgCl), whereby the metal ions in the metal electrolyte 3 are reduced to metal. After the atom, it is covalently bonded to the Dreaming Coupling molecule on the substrate 31 to deposit and form the metal nanoparticle film on the substrate 31. In the example, the metal electrolyte is 〇 After the gold in the tetrachloroauric acid is reduced from 8 1377270 to the gold nanoparticle, the metal nanoparticle phase is formed on the substrate 31 by covalent bonding with the ^^ . Preferably, the surfactant in step 203 acts as an electrolyte and can utilize the negatively charged environment of its hydrophilic end to achieve the attraction of the metal ion fruit. In addition to helping to conduct electricity, surfactants can also act as stabilizers to prevent metal particles from agglomerating. They are also known as co-conductors and stabilizers. The chemical formula of DBSA is as follows: Ο CH3(CH2)12

Features. Therefore, by the adsorption of the surfactant on the solid surface, it can form a molecular film on the surface of the reduced metal nanoparticles, preventing the particles from coming into contact with each other and preventing aggregation. Preferably, the surfactant is an anionic (tetra) surfactant, which can be removed by water rinsing after the reaction is π, so that the residual surfactant affects the metal naphthalene. The performance of the rice particle film. In addition, anionic surfactants have biodegradable properties that best meet the needs of modern environmental protection. In this embodiment, 'dodecylbenzenesulfonic acid (DBSA for short) is selected as the surfactant · -|-〇@Na€

II. Step 204: After the metal nanoparticle film is formed on the substrate 31, the deposited substrate 31 is washed with deionized water and dried with nitrogen. It is to be noted that when the metal electrolyte 3〇 prepared in this embodiment is an electrolyte containing gold ions, a gold nanoparticle film is formed on the substrate 31, and the substrate is modified in step 201 using MPTMS. 31 main 9 1377270 is capable of forming a stable Au-S covalent bond with the gold nanoparticles by its SH base end, because the binding energy of the Au-S bond is quite strong and the ratio

The bond of Au-Au bond is stronger, so that Au tends to bond with SH, and many gold particle nuclei are formed, instead of Au and Au bond aggregates grow into gold particles with larger particle diameter. Therefore, the strong bond between the MPTMS and the gold nanoparticles can be used to reduce the Au and Au bond aggregation to integrate the larger particle size of the gold particles, and the substrate 31 modified with the MPTMS can be electrochemically coupled with the metal electrolyte 30. At the time of deposition, a film of gold nanoparticles having a high density and a small particle size can be deposited on the substrate 31. <Specific Example>. In order to facilitate the subsequent electrochemical deposition, a substrate having a conductive property is selected. * A conductive substrate having a transparent conductive'oxide (TCO) film which is commonly used on the market at present. Substrates such as ITO, IZ, AZO, GZO, and various metal sheets such as gold (Au), platinum (Pt), and the like. The following is a specific example of depositing a film of a layer of gold nanoparticles on an ITO substrate.

(1) Cleaning of the substrate The substrate is first cut to a size of 1 x 4 cm. Then, the cells were washed in different solvents in the order of acetone-soap-deionized water, and ultrasonically shaken for 20 minutes in each solvent. (2). Modification of organic molecule MPTMS (modified)

The cleaned substrate was immersed in a supersaturated sodium hydroxide (NaOH) solution for 30 minutes, carefully rinsed thoroughly with deionized water and blown dry with nitrogen (N2). This step is to remove the oxide layer on the substrate and expose the substrate to the end of OH 10 1377270. This allows the substrate to react with the sol-coupled molecules such as MPTMS to form a sol-gel reaction to form Si-0-. The stable covalent bond of Si allows the MPTMS to be firmly bonded to the surface of the substrate. Alternatively, the oxide layer on the substrate can be removed by plasma or by immersion in a piranha solution.

The above piranha clean is a mixture of H2S〇4 and H2〇2, mainly by the strong oxidizing property of h2so4 to destroy the hydrocarbon bond in the organic matter, and the sulfuric acid can cause the organic matter to be dehydrated and carbonized, and the hydrogen peroxide The carbonized product can be oxidized to carbon monoxide or carbon dioxide gas. Next, the substrate was placed in a 1 mM solution of MPTMS in ethanol (99.5%), and immersed at room temperature for one hour. The soaked substrate was washed with an ethanol solution (99.5%) and placed in an oven at 80 ° C for 2 hours. (3). Preparation of gold electrolyte

In order to deposit the gold nanoparticles on the substrate, the dispersibility is good, so that the surfactant is used as a protective agent. Here, an anionic surfactant DB S A was used for the experiment. Weigh 0.0042 g (1.2Xl (T6 mol) of DBSA into 10ml of 18M Ω ultrapure water. In addition, add 0.2ml of 2xl0_4 HAHAuC14 solution to the prepared DBSA solution and mix it evenly by ultrasonic vibration. (4) The deposition of gold particle film is shown in Figure 3. Electrochemical deposition is performed by a three-electrode system. The working electrode is an ITO substrate with modified MPTMS, the auxiliary electrode is white gold wire, and the reference electrode is Ag/AgCl. 11 1377270 The cleaned substrate is immersed in the prepared gold nanoparticle solution, and the adsorption force between the substrate and the gold nanoparticle is determined by changing the bubble end time to determine the adsorption force between the substrate and the gold nanoparticle. The modification of the substrate can be carried out by using the molecule of the decane coupling group as mentioned above. The other portion of the decane coupling group can be a molecule such as SH or Nh3, and the force between the substrate and the gold nanoparticle can be changed. According to the literature, 'Because HAuCU · 3H20 can form gold nanoparticles regardless of the application of positive or negative voltage, only the crystal crystals formed are not the same. (such as dodecahedron or icosahedron), in order to prevent Applied The voltage causes dissociation of water (the dissociation potential of water is about ± e 8 eV). Therefore, in this specific example, 疋 is applied to the electrolyte containing gold ions by electrochemical deposition at a potential of 乂. Immediately afterwards, the deposited substrate was carefully washed with deionized water and dried with nitrogen (N2). Referring to Fig. 4, the metal nanoparticle film prepared by the above method was dispersed in the moonlight (Energy). The dispersive spectrometer is used to examine the obtained EDS map. From the display results and data of the graph, it is known that the MPTMS-modified substrate is immersed in a gold-containing gold-containing solution by using the φ method of the present invention. The metal deposited in the gold nanoparticle film deposited by the deposition system on the substrate is gold. As shown in Fig. 5(b), the SEM image obtained by electrochemical deposition of gold on the substrate modified by MPTMS is shown. It is shown that the gold nanoparticles deposited on the substrate are deposited on the substrate in a small particle size and high density. <Substrate modified with different decane coupling molecules and unmodified 12 1377270 substrate for Chennai Deposition of particles of the obtained thin metal nanoparticles >

Prepare five modified or unmodified ITO substrates, which are divided into A substrate, B substrate, C substrate, D substrate, E substrate, and then perform gold nanoparticle deposition as a specific example with these five substrates, respectively. Forming a gold nanoparticle film on the substrates, and observing the formed film morphology by a scanning electron microscope, wherein the A substrate to the D substrate are substrates modified with four different decane coupling molecules, respectively, and the E substrate An unmodified ITO substrate, and the A substrate is a substrate modified by APTES ((aminopropyl) triethoxysilane), and the B substrate is a

The substrate substrate of the C MPTMS ((3-mercaptopropyl) trimethoxysilane) modified substrate is modified by GPTS ((3-glycidoxyproplymethoxy silane)), and the D substrate is modified by (Trimethoxysilyl) benzene, these four decane-coupled molecules The chemical structure is as follows:

H3c

3-GlycIdoxypropyltriiiieilK〇xysihnc (GPTS)

(APTES)

OCH I

SI-OCH3 OCH3 HS OCH3 t ^ \^, och3 0ch3

(InmefliozysyyQbeiizaic 13 1377270 According to the above chemical structural formula, it can be seen that the groups at one end of the decane-coupled molecules on the A, B, C, and D substrates are amino (-NH2) and thiol (-SH), respectively. , epoxy group (" V), phenyl (Ό). The SEM images of the gold nanoparticle film deposited on the A substrate, the B substrate, the C substrate, and the D substrate are respectively shown in Fig. 5 (a), ( b), (c), (d), the SEM image of the gold nanoparticle film deposited on the E substrate is shown in Figure 6. The unmodified E substrate and the decane can be seen from the results of the graph. The A-substrate to the D-substrate modified by the coupling-like molecule is a gold film which is not dispersed gold particles but is coalescence after being deposited, and it is shown that the A-substrate to the D-substrate modified by the organic molecule does affect The deposition pattern of the gold nanoparticles, therefore, the substrate modified by the decane-coupled molecule can distribute the gold nanoparticles deposited thereon in a dispersed state, and then compare (a) and (b) of FIG. 5, respectively. (c), (d), after the modification of the decane-coupled molecule MPTMS with SH as the tail end

The B substrate can be deposited to form a high-density and small-diameter gold nanoparticle, and the decane-coupled molecules having different base ends are also affected by the strength of the interaction between the base end and the metal ion. The deposition pattern of the particles is mainly based on the fact that the SH-based end of MPTMS can form a stable Au-S covalent bond with the gold nanoparticles, and the binding energy of the Au-S bond is quite strong. There is 120kJ/mol, which is stronger than the bond of 50kJ/mol of Au-Au bond, which makes Au more prone to bond with SH, and forms many 14 1377270 gold particle nuclei, instead of Au and Au bond aggregates grow into The larger particle size of the gold particles, therefore, the B-substrate modified with the MPTMS can deposit a single-layered gold nanoparticle film having a higher density and a smaller particle size than the substrate modified with other kinds of decane-coupled molecules.

Referring to FIG. 7, it is shown that the average particle size between the gold particles deposited on the solid substrate increases as the deposition time increases. Therefore, the Chennai can be controlled by adjusting the deposition time of the gold nanoparticles. The particle size of the rice particles and thus Bb are sufficient for the application to deposit a gold nanoparticle film having a predetermined average particle diameter on the substrate. When the gold nanoparticles are not deposited on the substrate, it is worth mentioning that

The Vis absorption wavelength position is at 52 〇 nm, when the modified substrate is immersed in a gold electrolyte containing gold ions to deposit gold nanoparticles on the substrate and the deposition potential is set to _〇7V, and the deposition time is 5, respectively. Leap seconds, _ seconds, 150 seconds, 200 seconds, 25 seconds, 3 seconds, 35 seconds, seconds

When the heart is 500 private, the color of the deposited substrate changes from transparent colorless to pink to blue.参 _ 8 ' Take the above-mentioned different deposition time of the substrate for the absorption spectrum measurement, showing that when the deposition time is from 500 to 200 seconds, + too water & 7 * not only 4 surface electric 襞 belt (surface plasma 匕It will shift from 559(10) red to about _nm, and then use the absorption 4 wavelength pair/child time to plot the relationship curve as shown in Fig. 9. This result is mainly due to the gold nanoparticles dispersed in the aqueous solution. The distance between the gold nanoparticles on the (four) substrate is much shorter, and as the deposition time increases, the particle size of the gold nanoparticles becomes larger, causing the particle 15 1377270 sub-space to become closer, so the interparticle The distance of the electron cloud is also closer, causing the near-field energy to increase sharply, and it is more likely to generate a collective oscillation of electrons, thus causing the red shift of the UV-Vis absorption wavelength. Thereby, different depositions can be utilized. The optical properties of different sizes of gold nanoparticles formed by time 'further development of its application potential>> In summary, the method for preparing the single-layer metal nanoparticle film of the present invention can achieve the following effects and advantages, so Achieving the object of the present invention: 1. Combining the electrochemical deposition method and using the surfactant A can prevent the metal electrolyte from accumulating the reduced metal nanoparticles, and then passing through the substrate modified by the ruthenium-coupled molecule, so that the same The metal nanoparticle is stably bonded to the substrate and forms a single layer, a higher density and a relatively small particle deposition morphology, so that the present invention can be processed by using a suitable surfactant and a specifically modified substrate. A relatively simple, inexpensive electrochemical deposition method for directly synthesizing a single-layer metal nanoparticle film on the substrate has the commercial value. In addition to forming a single layer on the substrate by the process of the present invention. In addition to the metal nanoparticle film, the particle size of the metal nanoparticles deposited on the substrate can be controlled by the length of deposition time to further utilize the characteristics caused by different particle sizes for specific needs, for example, when When the particle size of the metal nanoparticles is different, the uv_vis absorption wavelength is generated, so that the present invention can be further developed. The potential of the application range. 3. When the metal nanoparticle film deposited on the substrate is gold, it can be applied by using the non-biotoxic property of gold (4) to bind a specific biomolecule to a biomolecular template. The potential of the biotech product is 16 1377270. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto. The simple equivalent changes and modifications made by the content are still within the scope of the patent of the present invention. [Simplified illustration of the drawing] Fig. 1 is a flow chart showing the preparation method of a conventional gold nanoparticle film; Is a flow chart illustrating a preferred embodiment of the method for preparing a single layer of gold nanoparticles according to the present invention; and FIG. 3 is a schematic view showing the configuration of a three-electrode system used in electrochemical deposition of the preferred embodiment; 4 is an energy dispersive spectroscopy (EDS) image of a single layer of gold nanoparticle film prepared in the preferred embodiment; FIG. 5 is a scanning electron microscope photo, illustrating The morphology of the formation of gold nanoparticles is deposited on the substrate of the different molecular ceramics. The gland image 6 is a scanning electron microscope image showing the deposition of gold nanoparticles on the unmodified substrate. The shape of the film, · Figure 7 is a - curve relationship diagram, showing the average particle size of the nanoparticle film at different depositions; the wind is gold too... The graph 'yes-curve relationship diagram' illustrates the thin gold particles formed by different deposition times The UV-Vis absorption spectrum of Chess; and Figure 9 is a graph of the relationship between the gold 17 1377270 nanoparticle film formed by different deposition times and its UV-Vis absorption wavelength position. 18 1377270 [Description of main component symbols] 30......· -----metal electrolyte 41 •...working electrode 31···.....substrate 42 ..... auxiliary electrode 40·.... Three-electrode system 43..." reference

19

Claims (1)

1377270 No. 98100479 - Patent application for supplementation, amendment of the specification of the replacement of the 刽 刽 — — 页 页 页 ( ( ( ( ( ( ( ( ( ( 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 (i) providing a substrate modified with a decane coupling molecule; (η) preparing a metal electrolyte comprising a metal compound component mixed in a predetermined ratio and a surfactant component of the metal compound group a plurality of metal compounds respectively combined with a predetermined metal ion, the surfactant component is selected from dodecylbenzenesulfonic acid; and (iii) the modified substrate is immersed in the metal electrolyte, and The electroless 0 chemical deposition method causes the metal ions in the metal compound component to be reduced to metal nanoparticles, whereby a metal nanoparticle film is deposited on the substrate. 2. The method for preparing a single-layered metal nanoparticle (4) according to the above-mentioned patent scope, wherein in the step (1), one end of the decane-coupled molecule has a group selected from the group consisting of : thiol group and amino group. 3. The method for producing a single-layered metal nanoparticle thinner according to the second aspect of the patent application, wherein in the step (1), the ceramsite-coupled molecule has a thiol group. 4. The method of preparing a single-layered metal nanoparticle thin layer according to the third aspect of the invention, wherein the fragmented coupling molecule in the step (1) is a propyltrimethoxydecane. 5. The method according to claim 3, wherein in the step (1), the substrate is subjected to a cleaning treatment and an oxide removal layer, respectively, to expose the substrate to a hydroxyl group. End to benefit 20 丄 ^ said (four) patent application, the case arrested August. 4 charge 'corrected after the instructions without a line replacement page correction period: 101 years and Shi Xi burning coupled molecules for hydrolysis polymerization. 6. According to the patent application method of the patent application, the single-layer metal nanoparticle thin film substrate described in the seventh paragraph. Μ(1) towel, silk plate is selected to have conductivity. 7. According to the method described in the sixth paragraph of the patent scope, the method of cooking is not a wood particle binding film. In the step (1), the substrate has a conductive film. , : Conductive (4) is made of materials selected from the group consisting of indium tin oxide, zinc indium oxide, zinc aluminum oxide, and zinc gallium oxide. 8. The method for preparing a single-layer metal nanoparticle film according to claim 7, wherein in the step (Η), the metal ions in the metal electrolyte are selected from the group consisting of Formed by the metal: gold, silver 'copper' # '钸' iron and nickel. 9. The method of producing a single-layered metal nanoparticle film according to claim 8, wherein in the step (Π), the metal ions are substantially gold ions. 10. The process for producing a single-layered metal nanoparticle film according to claim 9, wherein in the step (ii), the metal compound in the metal compound component is substantially tetragas gold acid. 11. The method for producing a single-layer metal nanoparticle film according to claim 10, wherein the metal nanoparticle film in the step (iii) is a gold ion in tetrachloroauric acid is reduced to Chennai The rice particles are then formed by covalent bonding with the decane-coupled molecule. 12. The method for preparing a single-layer metal nanoparticle film according to the scope of claim U, wherein 'in step (iii) is supplemented by a working electrode, a supplement 21 1377270 No. 981Ό0479 The instruction to repair the money without line of sight replaces the product formed by the auxiliary electrode and a reference electrode, and the working electrode is connected to the modified phase. The auxiliary electrode is white gold and silver. a two-electrode system for electrochemically depositing a substrate of a ceramsite-coupled molecule and the reference electrode is silver/chlorinated. 13. According to the method for preparing a single-layer metal nanoparticle film according to claim 12 of the patent application, A step (iv) after the step (iii) is carried out. After the metal nanoparticle film is formed on the substrate, the deposited substrate is washed with deionized water and dried with nitrogen. 14. The method for preparing a single-layer metal nanoparticle film according to claim 9 of the patent application, wherein 'in step (iii) 'can control the deposition time' to change the UV-Vis absorption of the metal nanoparticle The absorption wavelength position of the map. 15. The method for preparing a single-layer metal nanoparticle film according to claim 14, wherein in step (iii), the absorption wavelength of the UV-Vis absorption spectrum of the metal nanoparticle formed at different deposition times The position is between 520nm~60〇ηιπ 0 twenty two