KR20100075224A - A polymer film for fingerprint detection or identification and a detection or identification method using thereof - Google Patents

Abstract

PURPOSE: A polymer film for the fingerprint detection or the identification, and a fingerprint detection method using thereof are provided to apply the polymer film for a system detecting fingerprints by reacting to triglyceride and fatty acid. CONSTITUTION: A polymer film for the fingerprint detection or the identification has the fractional free volume of a base film over 0.15. The base film includes poly[1-phenyl-2-[P-(trimethyl silyl) phenyl]acetylene] marked with chemical formula 1. A fingerprint detection method using the polymer film comprises a step of detecting the trace of a fingerprint from a material by transferring the polymer film to the base film. The material is selected from the group consisting of a slice glass, a steel plate, and a polyethylene plastic film.

Description

A polymer film for fingerprint detection or recognition, and a fingerprint detection or recognition method using the same

The present invention relates to a polymer film for fingerprint detection or recognition, and a fingerprint detection or recognition method using the same, and more particularly, to a novel chemical imaging method for fingerprint traces or fingerprint recognition.

At many crime scenes, fingerprint traces are one of the most important clues to catching criminals. ^{In the} field of criminal science, many methods for detecting fingerprint traces have been developed. ^{The 2-6} detection technique uses two methods, 1) ninhydrin and 1,8-diaza-9-fluorenone (DFO), to detect fingerprint traces on porous surfaces such as paper, depending on the form of fingerprint traces remaining. Methods ^{7, 8,} and 2) Cyanoacrylate fuming method ⁹ for detecting fingerprints on non-porous surfaces such as glass and plastics. However, all these methods often require cumbersome post-processing such as luminescent dye spraying and vacuum metal deposition for high visibility of fingerprint traces. Therefore, in recent years, simpler and simpler detection techniques are required for easier crime tracking and reliable evidence.

Chemical imaging, which uses multiple spectrophotometric methods, is typically a non-destructive technique and requires no special sample preparation, thus increasing the efficiency of sample analysis and reducing potential contamination, thus evaluating it as a potential means of detecting fingerprint traces. I am getting it. ^{5, 9, 10, 11} Thus, chemical imaging can provide higher spatial / spectroscopic analysis data as well as chemical information for specific components in the fingerprint traces. ^{10, 11}

An example can be found from the description in WO08 / 044494 (2008.04.17) for a polymer and method for fingerprint detection using 2-cyanoacrylate (monomer) by TOAGOSEI CO., LTD. As a substrate. Specifically, the present invention discloses a technique for detecting a fingerprint even in a nearly white specimen such as a shopping bag or aluminum foil. However, the technique is still insufficient to detect trace fingerprints.

On the other hand, poly [1-phenyl-2- ( p -trimethylsilyl) phenylacetylene] (hereinafter referred to as 'PTMSDPA;') of Formula 1 has a very high fractional free volume (FFV) of 0.26 in the film. Fluorescent conjugated polymers. ^{12, 13} Thus, the polymer allows various kinds of liquid compounds to easily diffuse into the film due to the high porosity at the molecular size level.

Reference

1. Brettell, TA; Inman, K .; Rudin, N .; Saferstein, R. Anal. Chem. 2001, 73 , 2735-2744.

2. Home Office Scientific Development Branch (HOSDB). Fingerprint Development Handbbok, 2nd ed .; Heanor Gate Printing Limited: Heanor, Derbyshire, UK, 2005.

3. Leggett, R .; Lee-Smith, EE; Jickells, SM; Russell, DA Angew. Chem. Int. Ed. 2007, 46 , 4100-4103.

4. Sametband, M .; Shweky, I .; Brain, U .; Mandler, D .; Almog, J. Chem. Commun. 2007, 1142-1144.

5. Ricci, C .; Bleay, S .; Kazarian, SG Anal. Chem. 2007, 79 , 5771-5776.

6. Jelly, R .; Lewis, SW; Lennard, C .; Lim, KF; Alomg, J. Chem. Commun. 2008, 3513-3515.

7. Almog, J .; Sears, VG; Springer, E .; Hewlett, DF; Walker, S .; Wiesner, S .; Lidor, R .; Bahar, E. J. Forens. Sci. 2000, 45 , 538-544.

8. Elber, R .; Frank, A .; Almog, J. J. Forens. Sci. 2000, 45 , 757-760.

9. Beesley, KM; Bamaskinos, S .; Dixon, AE J. Forens. Sci. 1995, 40 , 10-17.

10. Exline, DL; Wallace, C .; Roux, C .; Lennard, C .; Nelson, MP; Treado, PJ J. Forens. Sci. 2003, 48 , 1-7.

11. Ifa, DR; Manicke, NE; Dill, AL; Cooks, RG Science 2008, 321 , 805.

12. Tsuchihara, K .; Masuda, T .; Higashimura, T. J. Am. Chem. Soc. 1991, 113 , 8548-8549.

13. Toy, LG; Nagai, K .; Freeman, BD; Pinnau, I .; He, Z .; Masuda, T .; Teraguchi, M .; Yampolskii, YP Macromolecules 2000, 33 , 2516.

14. Kwak, G. Lee, W, -E .; Jeong, H. Sakaguchi, T .; Fujiki, M. Macromolecules

submitted.

15. Downing, D .; Strauss, J .; Pochi, P. J. Invest. Dermatol. 1969, 53 , 322-327.

16. Kellum, R. Arch. Dermatol. 1967, 95 , 218-220.

17. Greene, R .; Downing, D .; Pochi, P .; Strauss, J. J. Invest. Dermatol. 1970, 54 , 240-247.

18. Cassidy, D .; Lee, C .; Laker, M .; Kealey, T. FEBS Lett. 1986, 200 , 173-176.

19. Middleton B .; Birdi, I .; Heffron, M .; Marsden, J. FEBS Lett. 1988, 231 , 59-61.

20. Nicolaides, N. Science 1974, 186 , 19-26.

21.Its synthesis was already reported in previous papers (ref. 12). The polymer used in this study has a high weight-average molecular weight ( M w) of 5.23 x 106 g / mol and polydispersity index (PDI = M w / M n) of 3.2.

22. Lipid standard (triglyceride mixture) was also purchased from Sigma-Aldrich Co, Ltd., Which contains approximately equal amounts by weight of glyceryl tridecanoate, glyceryl tridodecanoate, glyceryl trimyristate, glyceryl triocatanoate, and tripalmitin.

23.Fatty acid standard was purchased from Sigma-Aldrich Co Ltd., which contains approximately equal amounts by weight of palmitic acid methyl ester, stearic acid methyl ester, oleic acid methyl ester, linoleic acid methyl ester, and linolenic acid methyl ester.

24. Shalita, A. J. Invest. Dermatol. 1974, 62 , 332-335.

25. Brightness and contrast was appropriately controlled by using imaging software of Adobe Photoshop 7.0 to enhance the resolution of the FL image.

Accordingly, the inventors note that the oil components in the fingerprint traces can be easily transferred into the film through many micropores in the PTMSDPA film and then chemical stimulation can increase the fluorescence (FL) intensity of the PTMSDPA film based on the SIEE phenomenon. Thus, the present invention has been completed.

Specifically, during the study of the present invention, the inventors found that when some compounds such as alcohols, hydrocarbons and mineral oils diffuse into the PTMSDPA film, the film easily swells through many micropores ¹⁴ and at the same time the fluorescence It was confirmed that the (FL) intensity was significantly increased, and this phenomenon was called swelling-induced emission enhancement (SIEE).

The inventors believe that the compound-induced SIEE phenomenon in the PTMSDPA film would be applicable to FL imaging of latent fingerprint traces, where the oil present on the surface of the skin in the human body is a complex mixture such as sebum, lipids, sweat, etc. Human sebum is composed mainly of triglycerides, wax esters and squalene with several cholesterols and cholesterol esters, and ^15-20 such oil components are always present in the traces of fingerprints, although there are only a few more and smaller differences in their contents. As one can see, PTMSDPA is basically a hydrophobic polymer and the film has a large amount of FFV.

That is, the present invention aims to apply a novel FL imaging technique based on lipid transfer behavior to PTMSDPA films to detect fingerprint traces or recognize fingerprints.

In order to achieve the above object, the film for fingerprint detection or recognition according to the present invention preferably has an FFV (free fluid fraction, fractional free volumn) of the base film of 0.15 or more, and more preferably FFV of 0.26 or more.

Preferably, the base film has a fluorescence intensity of 12.5 times or more when exposed to an oil component within an excitation light wavelength range within a range of 350 nm to 500 nm and a fluorescence band shifts to a short wavelength side of 6 nm or more.

Preferably, the base film is characterized in that it comprises a PTMSDPA having the formula (1).

[Formula 1]

More preferably, in the formula, the carbon branched to Si are to independently substituted by R _1, R _2, R ₃ each in PTMSDPA of formula (II) wherein R _1, R _2, R ₃ are each an aliphatic hydrocarbon group Or an aromatic hydrocarbon group independently, and n is an integer selected from 10 to 100,000.

As the base film, in addition to using the above-described PTMSDPA alone, when using a polyfluorene derivative, a polyphenylene derivative, a polyethylene derivative, a polythiophene derivative having a FFV (Fractional Free Volumn) of 0.15 or more in combination, It is desirable to be able to effectively detect the fluorescence change upon fingerprint recognition or detection.

Preferably, the substrate may be a transparent plastic film and a thin coating of the substrate film thereon to improve mechanical strength.

More preferably, not only the base film can be used alone, but also the fluorescent dye molecules selected from coumarin, nile red, DCM, and DCM2 prior to use can impart a synergistic effect of fluorescence change.

Most preferably, a transparent plastic film is used as a base, and a thin film of a base film containing fluorine molecules selected from coumarin, nile red, DCM, and DCM2 dispersed thereon is used to increase mechanical strength with synergistic effect of fluorescence change. do.

Furthermore, in the preparation of the base film tested in the present invention, the present invention is not limited thereto, but the film thickness is 1 ohmstrom to 1 micrometer for fingerprint recognition, and the film thickness is 1 to fingerprint detection. Fabrication to be 100 micrometers is most desirable in view of economics and fingerprint detection / recognition efficiency at the same time.

In addition, FFV referred to in the present invention means the free volume fraction in the film.

When such a base film is exposed to an oil component, the fluorescence intensity is increased by about 12.4 times or more, and at the same time, the fluorescence band is shifted to the short wavelength side of 6 nm or more, and furthermore, the fluorescence is found to increase slightly with the exposure time. Although triglycerides and fatty acids corresponding to the fraction of are relatively larger molecules than conventional organic solvents such as conventional alcohols and liquid hydrocarbons, the above-described triglycerides and fatty acids and polymers in the film according to the present invention are basically hydrophobic. And amphiphilic compounds, therefore it is inferred that the fingerprints are easily transferred into the hydrophobic PTMSDPA film through the micropores due to van der Waals hydrophobic attraction between them. Subsequently, triglycerides are made of highly entangled polymers when swollen, thus reducing π-π interactions and eventually enhancing fluorescence.

In addition, in order to achieve the above object, the fingerprint detection or recognition method of the present invention can further improve the mechanical strength by using a transparent plastic film as the substrate and a thin coating of the substrate film thereon. .

More preferably, not only the base film can be used alone, but also prior to use, dispersing a fluorescent dye molecule selected from coumarin, nile red, DCM, and DCM2 may impart a synergistic effect of fluorescence change.

Most preferably, dispersing a fluorescent pigment molecule selected from coumarin, nile red, DCM, DCM2 in the base film; And simultaneously or sequentially based on the transparent plastic film, and coating the base film thinly thereon; Including a synergistic effect of the fluorescence change and the effect of increasing the mechanical strength can be achieved at the same time. Then, when the fingerprint trace is detected or the fingerprint is recognized, the excitation light wavelength within the range of 350 nm to 500 nm can be effectively used to detect or recognize the fingerprint.

In this case, the base film is not limited thereto, but it is most preferable to manufacture the substrate film so as to have a thickness of 1 ohmstrom to 1 micrometer in consideration of economical efficiency and fingerprint recognition efficiency at the same time. It is also preferable to manufacture a thickness of 1 to 100 micrometers in consideration of economics and fingerprint detection efficiency at the same time, which can be applied as a criterion for selecting a coating thickness even when a thin coating using a separate substrate. .

Specifically, the above-described polymer film is transferred from a substrate to which a fingerprint trace is attached to detect a fingerprint trace. In this case, glass or plastic such as slide glass, steel plate, or polyethylene (PE) plastic film is used as the substrate. Characterized in that. In addition, the polymer film described above is used as a fingerprint recognition substrate.

According to the present invention, the boundaries between exposed and unexposed areas were clearly seen in both wide field and confocal fluorescence images after only a few minutes. When one arbitrary provider integrally attaches a fingerprint trace on the surface of the PTMSDPA film, the FL image gives a high resolution bright signal from the gyrus. The fingerprint image is easily erased by washing with excess acetone for several seconds and then the newly attached fingerprint image is clearly visible in the same film. Fingerprint traces on nonporous surfaces such as slide glass, steel plates and polyethylene (PE) films can be easily transferred to the PTMSDPA film by gently pressing the PTMSDPA film onto a porous and smooth surface.

When transferring fingerprint traces onto the PTMSDPA film on the nonporous surface, the abnormal details and core of the fingerprint are clearly seen in the active FL image. On the other hand, fingerprint traces on porous surfaces such as paper are difficult to transfer to PTMSDPA films. PTMSDPA films are very reactive to very trace amounts of human sebum. The fingerprint trace is detectable even if the fingerprint is attached very thinly to the surface yarn of the slide glass.

The polymer film according to the present invention is sensitive to the sebum component of triglycerides and fatty acids and can be applied to a system for recognizing fingerprints by directly fingerprinting on a film, and using a method of transferring a fingerprint trace onto a film. This can be applied to the detection of important on-site fingerprints in criminal forensics. In addition, it is simpler than the conventional powder method, and it is possible to realize high clarity due to the change of fluorescence color along with the turn-on fluorescence increase, which is an innovative method that is one step ahead of the currently used fingerprint detection method.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the film for fingerprint detection or recognition of this invention is described in detail.

Example 1 Preparation of PTMSDPA Film

Select PTMSDPA having the formula (1) as the base film, but the thickness of the PTMSDPA on a transparent plastic film (100 micrometers for 3M PP 2910 OHP Film general copying machine) for fingerprint recognition A thin coating (spin coating, 900 ~ 1000rpm, 30 seconds, polymer concentration: ~ 1wt%) to 1 micrometer, and prepared for the fingerprint detection, the PTMSDPA alone was prepared to satisfy the thickness of 10 micrometers.

Example 2 Fingerprint Trace Detection

The weight-average molecular weight ( M w) and number-average molecular weight ( M n) of the PTMSDPA film prepared in Example 1 were obtained as gel infiltration chromatography (Shimadzu A10 instruments (Kyoto, Japan), Polymer Laboratories (Shropshire, UK), column PLgel Mixed-B, 300 mm long, and HPLC-grade tetrahydrofuran as eluent as eluent at 40 ° C. were measured based on a scale with polystyrene standards.The photoluminescence spectra were measured on a JASCO ETC-273 spectrophotometer. Recorded.

In order to measure the FL reactivity of PTMSDPA film ²¹ in human sebum, a 50: 50% by weight mixture of lipid standard ²² and fatty acid standard ²³ was used as a representative component of sebum. The lipid / fatty acid mixture is very similar to the actual oil component of the fingerprint trace, because triglycerides partially hydrolyze the skin surface and convert it into fatty acids. ²⁴

The fluorescence image of the fingerprint trace was then taken with a Samsung NV3 digital camera. Fluorescence CCD images were recorded on a Nikon Eclipse E600 fluorescence microscope equipped with a Nikon DS-Fi1 digital camera.

In addition, in order to observe the dynamic change of the fluorescence image, a homemade Confocal Laser Scanning Microscopy (CLSM) was used as the imaging device. The handmade CLSM is based on confocal detection using a single pinhole in front of a detector (Hamamatsu PMT, R3896, Hamamatsu, Japan). Scanning of the beam was performed with a fast scanning polygon mirror and galvomometer. A water-immersed objective lens from Zeiss (C Apochromat 40X, NA 1.2) was used and the estimated lateral resolution was about 200 nm. The axial resolution of the CLSM can be defined as the axial position where the detected intensity drops to half of the focal plane. The measured axial resolution was about 7 μm: the CLSM optically splits the image plane with a 7 μm thickness. The imaged plan of the CLSM is located about 5 μm below the top of the film. Intermittent lines in the confocal image are artifacts caused by scanning the laser beam over the sample.

As a result, the fluorescence spectrum of the PTMSDPA film before and after contact with the lipid / fatty acid mixture was compared as FIG. 1. When the polymer film according to the present invention was exposed to the oil component, the fluorescence intensity increased by about 12.4 times, and at the same time, it was confirmed that the pipe tube band was shifted to the shorter wavelength side by 6 nm. Furthermore, the fluorescence increased somewhat in the exposure time. Although triglycerides and fatty acids are relatively large molecules compared to conventional organic solvents such as conventional alcohols and liquid hydrocarbons, triglycerides and polymers are basically hydrophobic and amphiphilic compounds, and therefore, van der Waals hydrophobic attraction between them. It is inferred to migrate easily through the micropores into the hydrophobic PTMSDPA film. Subsequently, triglycerides are made of highly entangled polymers when swollen, thus reducing π-π interactions and eventually enhancing fluorescence. This is believed to be the result of demonstrating the above-described SIEE phenomenon.

FIG. 2 shows (a) wide field and (b) confocal fluorescence images of the PTMSDPA film before and after application of the lipid / fatty acid mixture, respectively, as contrasted as FIG. 2. For reference, Figure 2 (a) is a fluorescent image in a wide field, Figure 2 (b) shows a confocal fluorescent image. The fluorescence image also shows an increase in fluorescence intensity with a change in emission color (from yellowish to blue) and application durability. It was confirmed that the boundary line between the mixture-applied area (left) and the non-applied area (right) began to distinguish within 5 minutes after application.

The border became clear as the fluorescence intensity increased. However, no clear lateral diffusion of the mixture was observed until 30 minutes after application. The oily mixture makes the axial diffusion (into the film) exclusive, which is probably due to gravity. Limited lateral diffusion of the mixture can be further enhanced by applying fingerprint trace detection of PTMSDPA_assisted fluorescence imaging.

Example 3 Fingerprint Recognition

In this embodiment, any one provider rubs the thumb on the oil portion of the face, and then directly attaches a fingerprint trace to the surface of the 1 micrometer-thick PTMSDPA film prepared in Example 1 to check the degree of fingerprint recognition and the results. 3 is shown.

Although no change by the absorbed image was observed with the naked eye and even under an optical microscope, a high resolution FL image of the fingerprint was seen when excited by conventional UV lamp light having a wavelength of 450 nm or more. 3A and 3B show real FL images and contrast-enhanced images ²⁵ of fingerprint traces in PTMSDPA film, respectively. The FL image detected a bright signal from the gyrus with very high resolution. 3C shows a higher magnification (x5 ×) FL image of the fingerprint.

The improved resolution provides a more detailed view of the fingerprint. The gyros within the fingerprint are visible. This indicates that it is possible to create clearer intragranular pores than in conventional chemical imaging methods. In addition, the fingerprint image in the PTMSDPA film is easily erased by washing with excess acetone for about 10 seconds and the newly attached fingerprint image is clearly visible in the same film. 4 shows a 'rasing-regeneration' process in which fingerprint images can be reused on PTMSDPA films.

Example 4 Contrast Fingerprint Detection Effect by Substrate Type with Fingerprint Traces

One provider attached fingerprint traces on four different surface-slide glass, polyethylene (PE) plastic films, steel plates, and paper. The fingerprints were attached on the four surfaces by pressing the thumb on the oily portion of the face. Fingerprint traces on the non-porous surfaces of slide glass, steel plate and PE film were easily squeezed into the PTMSDPA film by gently compressing the 10 micrometer thick PTMSDPA film for fingerprint detection prepared in Example 1 on the non-porous and smooth surface. Could have been killed. As an example, FIG. 5 shows an FL image photograph of a PTMSDPA film in which a fingerprint is transferred to slide glass. The gyrus details and the core of the fingerprint were confirmed to be clearly seen in the actual picture as shown in Figure 5a.

Moreover, contrast-enhanced, high resolution FL images were obtained with the aid of imaging software as shown in FIG. 5B. PTMSDPA films have a hydrophobic surface due to the nonpolar compound structure. Thus, the oil component of the fingerprint on the hydrophilic surface of the slide glass is easily transported into the PTMSDPA film through a number of micropores. On the other hand, fingerprint traces on the paper surface are difficult to transfer to the PTMSDPA film due to the large porosity and roughness of the paper surface. The FL imaging technique using the movement phenomenon of the present invention is completely different from conventional methods for detecting fingerprints, which makes it clear that it is particularly effective for detecting fingerprint traces on nonporous surfaces such as glass and plastic.

Example 5 Contrast Fingerprint Detection Effect for Fine Fingerprints

The donor then attached three series sets of fingerprints onto the slide glass without recharging the oily finger for the purpose of producing a fingerprint trace with a large amount of secretion.

All these fingerprints were transferred to a PTMSDPA film with a 10 micrometer thickness prepared for fingerprint detection in Example 1 to contrast with the contrast ratio in the FL image. Figure 6 shows a real FL image of three serial sets of fingerprints. Typically, the weaker the fingerprint, the weaker contrast was obtained. However, FL images of the fingerprints were clearly visible in all PTMSDPA films. Rather, the last attached fingerprint was transferred to the PTMSDPA film and then most clearly attached, since there was no excess oil component.

As a result, as shown in FIG. 7, the inventors were also able to detect extremely thin fingerprint traces, which were then completely washed with the oil components with Kimwipes by means of the present invention using a PTMSDPA film. Adhered to the surface of the slide glass. This demonstrates that PTMSDPA films are very responsive despite the very small amounts of human sebum.

As can be seen from the foregoing, we have demonstrated a new high resolution FL imaging method using PTMSDPA films with large amounts of FFV based on lipid migration phenomena for fingerprint trace detection. The PTMSDPA film responded rapidly to lipid / fatty acid stimulation. When PTMSDPA films are exposed to a lipid / fatty acid mixture, their fluorescence (FL) emission immediately increases and the fluorescence bands shift to shorter wavelengths at the same time. When one user attached the latent fingerprint directly on the surface of the PTMSDPA film, a high resolution FL image with a bright signal was obtained from the gyrus. The fingerprint image can be almost removed by washing with excess acetone, and the fingerprint image is newly reproduced on the same film.

When the fingerprint trace on the nonporous surface was transferred to the PTMSDPA film, the gyrus details and the core of the fingerprint were clearly seen in the actual FL image. The fingerprint traces were transferred to the PTMSDPA film even though the fingerprint was attached very thinly on the surface of the slide glass. Fluorescent conjugated polymer films with large amounts of FFV, such as PTMSDPA films, are useful materials for conventional non-destructive fingerprint detection and are very reliable for criminal tracking.

1 is a graph showing fluorescence spectra results before (O) and after (O) contact with a lipid / fatty acid mixture (film is free-standing, film thickness 30 μm, excited at 420 nm).

FIG. 2 shows the change over time of contact with a lipid / fatty acid mixture for a PTMSDPA film, where a) is a FL microscope and b) is a confocal microscope image, the left side shows the contact and the right side shows the non-contact (film free-standing, film thickness 30 μm, excited at 450 nm and above).

In FIG. 3, a) is a real digital camera fluorescence image, b) is an imaging software-processed fluorescence image, and c) is an enlarged image of a PTMSDPA film with a fingerprint directly transferred (film free-standing, film thickness). 30 μm, excited at 450 nm or more).

4 shows a digital camera fluorescence photograph for the removal and generation of fingerprints on a PTMSDPA film. The fingerprint was transferred directly to the PTMSDPA film (spin-coated on slide glass, excited at film thickness 30 nm, 450 nm or more).

In FIG. 5, a) is a real digital camera fluorescence image and b) shows an imaging software-processed fluorescence image of a PTMSDPA film with fingerprints transferred from the surface of the slide glass (film free-standing, film thickness 30 μm). , Excited at 450 nm or more).

6 shows imaging software-processed fluorescence images of three consecutive fingerprints (from left to right).

In FIG. 7 a) is a real digital camera fluorescence photograph, and b) shows an imaging software-processed image of a fingerprint-transferred PTMSDPA film. The fingerprint traces are thinly attached on the surface of the slide glass after wiping the fingerprint with KIMwipes (film free-standing, film thickness of 30 μm, excited at 450 nm or more).

Claims (12)

A polymer film for fingerprint detection or recognition, in which the FFV (fractional free volumn) of the base film is 0.15 or more. According to claim 1, wherein the FFV of the base film is 0.26 or more, within the excitation light wavelength range of 350 nm to 500 nm, the fluorescence intensity of the base film is increased by more than 12.5 times when exposed to an oil component and the fluorescence band is shorter than 6 nm A polymer film for fingerprint detection or recognition, which moves to the side. The polymer film for fingerprint detection or recognition according to claim 1, wherein the base film comprises PTMSDPA (poly [1-phenyl-2- [p- (trimethylsilyl) phenyl] acetylene] having the following Chemical Formula 1. [Formula 1]

The polymer film for fingerprint detection or recognition according to claim 3, wherein the PTMSDPA is prepared by dispersing a fluorescent pigment molecule selected from coumarin, nile red, DCM, and DCM2. The polymer film for fingerprint detection or recognition according to claim 1, wherein the base film is based on a transparent plastic film and is used by thinly coating the film. According to claim 3, wherein when using the PTMSDPA of the formula (1) Fingerprint, characterized in that used in combination with a polyfluorene derivative, polyphenylene derivative, polyethylene derivative, polythiophene derivative having a FFV (Fractional Free Volumn) of 0.15 or more Polymer film for detection or recognition The polymer film for fingerprint detection or recognition according to claim 1, wherein the base film is produced within a thickness of 1 ohmstrom to 1 micrometer and used for fingerprint recognition. According to claim 1, wherein the base film is a polymer film for fingerprint detection or recognition, characterized in that it is used for the fingerprint detection produced in the range of 1 ~ 100 micrometers thick A fingerprint trace is detected by transferring the polymer film according to any one of claims 1 to 8 from a substrate having a fingerprint trace attached thereto. At this time, the substrate is a fingerprint trace detection method, characterized in that using a slide glass, steel plate, or polyethylene (PE) plastic film. The method of claim 9, further comprising: dispersing a fluorescent pigment molecule selected from coumarin, nile red, DCM, and DCM2 in the base film; Simultaneously or sequentially Based on a transparent plastic film, a thin coating of the base film on the thickness of 1 to 100 micrometers thereon; And Detecting fingerprint traces using an excitation light wavelength in the range of 350 nm to 500 nm; Fingerprint trace detection method comprising a. A fingerprint recognition method comprising using the polymer film according to any one of claims 1 to 8 as a fingerprint recognition base film. 12. The method of claim 11, further comprising: dispersing a fluorescent pigment molecule selected from coumarin, nile red, DCM, and DCM2 in the base film; Simultaneously or sequentially Based on a transparent plastic film, a thin coating of the base film on the thickness of 1 ohmstrom to 1 micrometer; And Recognizing a fingerprint using an excitation light wavelength in the range of 350 nm to 500 nm; Fingerprint recognition method comprising a.

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