CN101690663A - Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide - Google Patents
Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide Download PDFInfo
- Publication number
- CN101690663A CN101690663A CN200910217705A CN200910217705A CN101690663A CN 101690663 A CN101690663 A CN 101690663A CN 200910217705 A CN200910217705 A CN 200910217705A CN 200910217705 A CN200910217705 A CN 200910217705A CN 101690663 A CN101690663 A CN 101690663A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- powder
- solution
- silicon dioxide
- mixed solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention belongs to the technical field of detection, and particularly relates to a method for manifesting latent fingerprints. The invention provides the method for manifesting the latent fingerprints. A magnetic brush is used to attract magnetic powder; the powder forms a 'magnetic powder ear' under the action of magnetic force; and the latent fingerprints on the surfaces of A4 paper, sheet glass, plastic bottles, pop-top cans, sheet copper, aluminum foils, tables or experiment tables can be manifested by using the tip of the powder ear to slightly brush various object surfaces printed with the latent fingerprints. The method is based on magnetic ferroferric oxide nano-powder and utilizes an phase reversal microemulsion polymerization method to prepare fluorescent magnetic silica gel spheres; and the method jointly coats magnetic granular ferroferric oxide and dye molecules in silicon dioxide microspheres by utilizing the hydrolysis of TEOS under alkaline conditions to perform one-step synthesis of magnetic silica monodisperse gel spheres and dye-doped magnetic fluorescent silica gel spheres to obtain magnetic fluorescent multi-functional powder, can be applied to more conditions and ranges, and has simple operation and no toxic or side effect.
Description
Technical field
The invention belongs to the detection technique field, be specifically related to method for manifesting latent fingerprints.
Background technology
Fingerprint is unchangeable to be meant from fetus and to form in 6 months in the fingerprint, end in after death the dermal papilla layer rots through being born, finger papillary ridges type, concrete form, the feature summation that the shape of each minutia, quantity, position and mutual relation are constituted is constant all the time.Fingerprint is unchangeable to have molecular genetics, histology and physiological basis.Based on this, fingerprint once had been known as " first of the evidence " by judicial circuit.Though the appearance of later stage dna technique once formed challenge to the status of fingerprint identification, yet, DNA detection cost height, length consuming time, sample vulnerable to pollution and DNA do not set up fully because discerning the comparison system automatically, therefore, up to the present, fingerprint still is that most investigation department carries out the first-selection that the person is assert.Investigation handle a case and court's process of argumentation in, the discovery and the identification of latent fingerprint acquire a special sense, simultaneously it also is the necessity of modern forensic science development and the embodiment of importance.Yet the fingerprint that occurs in the scene of a crime often is potential, needs could observe its texture structure with some process for show.Therefore, the evaluation fingerprint is correctly found, extracts, manifested to science, for the investigation of case with punish crime, has important practice effect and immeasurable social value.
1877, Charles Robert Richet Aubert utilized silver nitrate to manifest since the sweat fingerprint in the paper delivery, and fingerprint manifestation has become the professional technique of subject knowledges such as an integrated use physics, chemistry, biology and technology.Being applied to on-the-spot biological trace method for visualizing at present mainly contains: physics appearance method (luminescence method, powder method etc.), chemical appearance method (ninhydrin method etc.) and physical chemistry appearance method (many metal deposition appearance methods etc.).Wherein, to manifest laten fingerprints be one of method now commonly used to Magnaglo.The magnetic powder, formulated by reduced iron confused (carrier) and dyes in different colors.Be applicable to the impression of the hand that manifests the fresh and comparatively fresh on the body surfaces such as various paint body surfaces and porcelain, plastics, leather, true qualities wood, various paper, Calx white washed wall.
For adapting to the more applications condition and the scope of application, the present invention is based on the magnetic ferroferric oxide nanometer powder, the nucleocapsid structure of preparation silica magnetic ferroso-ferric oxide, be coated on magnetic-particle ferroso-ferric oxide and dye molecule in the silicon dioxide microsphere jointly, obtain the multi-functional powder of magnetic fluorescence, can be applicable to more conditions and scope, and have no side effect.
Summary of the invention
The objective of the invention is to prepare little, the nano-particle of magnetic fluorescent silicon dioxide, realize method different objects surface developing latent finger prints using.
The present invention is based on the magnetic ferroferric oxide nanometer powder, prepared magnetic silica and fluorescence magnetic silicon dioxide glueballs; The magnetic nanometer powder that obtains, magnetic silica and magnetic fluorescent silicon dioxide powder can manifest surperficial latent fingerprints such as glass, plastics, metal, composite plate (lacquer wood), paper.Powder adherence is on the perspiration of laten fingerprints and show streakline, and unnecessary powder can be siphoned away by magnetic brush, can be observed fingerprint lines clearly.Under ultraviolet source, can be observed luminous fingerprint lines.
Synthetic multifunction magnetic fluorescent silicon dioxide microsphere:
1, magnetic ferroferric oxide (Fe
3O
4) nanometer powder synthetic:
FeCl
24H
2O and FeCl
36H
2O is made into mixed solution, wherein FeCl
24H
2O and FeCl
36H
2The amount of substance of O is than being 1.1-1.3: 2, mixed solution is evenly stirred, be heated to 60-80 ℃ then, and maintenance constant temperature, dense HCl after three times is added drop-wise in the mixed solution fast with dilution, and regulator solution pH=6.5 slowly splashes into mass fraction and be 20% NaOH again, pH is transferred to 10-11, react after 2-3 hour, be cooled to room temperature, settlement separate with strong magnet to remove impurity, use distilled water wash, repeat 4-5 time, until pH value of solution=7,40-60 ℃ of vacuum drying then, obtain the magnetic ferroferric oxide nanometer powder, can be directly used in manifesting of laten fingerprints.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines, taking pictures with digital camera gets final product.
2, the preparation of magnetic silica microballoon powder:
Fe at first
3O
4Nanometer powder is in 4: 1 water and alcoholic acid mixed solution standby for the 0.2-1% ultra-sonic dispersion to volume ratio by mass volume ratio, the ethyl orthosilicate (being tetraethoxysilane TEOS) of 2-10ml is added in the 15-50ml alcoholic solution be mixed with solution one; Ammonia, 10-30ml ethanol, 2-10ml Fe with 5-20ml
3O
4Be mixed into solution two, under the room temperature, two solution mixed rapidly under electronic stirring, react after 4-20 hour, the product that obtains is settlement separate to remove impurity with strong magnet, clean 4-5 time with secondary water, dry, just obtain the magnetic silica microballoon powder of Dark grey nucleocapsid structure.The big I of silicon dioxide microsphere particle diameter is by TEOS in the solution, ammonia, and the difference of the ratio of water is regulated, and the size range that obtains can be between the 10-100 micron.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines, taking pictures with digital camera gets final product.
3, the preparation of magnetic fluorescent silicon dioxide nanometer powder:
Fe at first
3O
4Nanometer powder is in 4: 1 water and alcoholic acid mixed solution standby for the 0.2-1% ultra-sonic dispersion to volume ratio by mass volume ratio.
Microemulsion is made up of following reagent: room temperature, under electronic stirring, cyclohexane extraction, hexanol, three kinds of solution mix homogeneously of triton x-100 add Fe
3O
4Ultrasonic mixed liquor in water and ethanol, add ruthenium pyridine or 1 then, aqueous solution and the ethyl orthosilicate of 10-phenanthroline ruthenium 20mM mix and stir after 20-30 minute, the adding mass fraction is 25% ammonia, mentioned reagent cyclohexane extraction, hexanol, triton x-100, Fe
3O
4Mixed liquor, ruthenium pyridine or 1, the volume ratio of 10-phenanthroline ruthenium aqueous solution (20mM), ethyl orthosilicate and ammonia was followed successively by 7.5: 1.8: 1.77: 2-5: 0.48: 0.1-0.5: 0.06-0.3, mixed solution reacts after 20-24 hour under magnetic agitation, add and the isopyknic acetone breakdown of emulsion of mixed solution, the product that obtains is settlement separate to remove impurity with strong magnet, clean 4-5 time with secondary water, dry, just obtain the magnetic fluorescent silicon dioxide nanometer powder of pale brown color nucleocapsid structure.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under magneticaction, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines that the magnetic fluorescence powder is under ultraviolet source, the fingerprint lines that manifests the orange-colored light of setting out, taking pictures with digital camera gets final product.
The present invention has following advantage:
1, method is simple, quick, easy to operate, can be apparent in the laten fingerprints on the surface (sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, paper, desk or laboratory table) of various quality.
2, not by instrument (bore hole observation) can discern and manifest laten fingerprints; All obtain manifests fingerprint and can directly take pictures under natural light and fetch data, and powder can be luminous under the ultraviolet source of specific wavelength, can be used for the manifesting of laten fingerprints on the surface of particular substrate.
3, the present invention easily prepares and preserves; Cost is low, and consumption is few during use.
4, the present invention does not contain poisonous composition, and is safe in utilization, and the operator is had no side effect.
Description of drawings
Accompanying drawing 1, be image with the existing impermeability object laboratory table of magnetic ferroferric oxide significant powder brush surface laten fingerprints;
Accompanying drawing 2, be image with magnetic silica microballoon significant powder brush laboratory table surface laten fingerprints;
Accompanying drawing 3, be image with magnetic silica microballoon significant powder brush permeability object A4 paper surface laten fingerprints;
Accompanying drawing 4, be image with magnetic fluorescent silicon dioxide microsphere significant powder brush glass surface laten fingerprints;
The specific embodiment
Embodiment 1:
Magnetic ferroferric oxide (Fe
3O
4) nanometer powder synthetic:
FeCl
24H
2O, FeCl
36H
2O is made into mixed solution, wherein FeCl
24H
2O is 0.12mol/L, FeCl
36H
2O is 0.2mol/L, be made into the 160ml mixed solution, evenly stir, be heated to 80 ℃ then, and maintenance constant temperature, be added dropwise to fast in the mixed solution after three times of the dense HCl of the 1ml dilutions, make pH value of solution=6.5, slowly drip mass fraction again and be 20% NaOH, pH is transferred to 11, react after 3 hours, be cooled to room temperature, settlement separate with strong magnet to remove impurity, repeat 4 times with distilled water wash, until pH=7, vacuum drying then, obtain the magnetic ferroferric oxide nanometer powder, can be directly used in manifesting of laten fingerprints.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines, taking pictures with digital camera gets final product.
Embodiment 2:
The preparation of magnetic silica microballoon powder: at first with Fe
3O
4Nanometer powder is that 0.3% ultra-sonic dispersion is in 4: 1 the water and alcoholic acid mixed solution to volume ratio by mass volume ratio, be mixed with solution one in ethyl orthosilicate (being tetraethoxysilane TEOS) the adding 25ml alcoholic solution with 6ml, with the ammonia of 10ml, 20ml ethanol, 5ml Fe
3O
4Water and alcohol mixture be mixed with solution two, under the room temperature, two solution mix rapidly under electronic stirring fast, react after 20 hours, the product that obtains is settlement separate to remove impurity with strong magnet, and with the cleaning of secondary water, dry, just obtain the magnetic silica microballoon powder of Dark grey nucleocapsid structure.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines, taking pictures with digital camera gets final product.
Embodiment 3:
The preparation of magnetic fluorescent silicon dioxide nanometer powder:
At first with a certain amount of Fe
3O
4Nanometer powder is that 0.5% ultra-sonic dispersion is that it is standby to obtain mixture in 4: 1 the water and alcoholic acid mixed solution to volume ratio by mass volume ratio.
Microemulsion is made up of following reagent: room temperature, under magnetic agitation, cyclohexane extraction 7.5ml, hexanol 1.8ml, three kinds of solution of triton x-100 1.8ml mix, and add 1 of 0.5ml 20mM then, 10-phenanthroline ruthenium aqueous solution, ethyl orthosilicate 0.1ml, mix and stir after 20 minutes, the adding mass fraction is 25% ammonia 70 μ l, and mixed solution is under stirring rapidly, react after 24 hours, add isopyknic acetone breakdown of emulsion, the product that obtains is settlement separate removing impurity with strong magnet, and clean with secondary water, dry, just obtain the magnetic fluorescent silicon dioxide nanometer powder of pale brown color nucleocapsid structure.
During use, pick up Magnaglo with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines that the magnetic fluorescence powder is under ultraviolet source, the fingerprint lines that manifests the orange-colored light of setting out, taking pictures with digital camera gets final product.
Claims (4)
1. magnetic fluorescent silicon dioxide is used for the method for developing latent finger prints using, it is characterized in that concrete steps are as follows:
Pick up magnetic ferroferric oxide nanometer powder or magnetic silica microballoon powder or magnetic fluorescent silicon dioxide nanometer powder with Magnetic brush, powder forms " magnetic force powder fringe " under the effect of magnetic force, gently stencil the various objects surface of laten fingerprints with powder fringe tip, comprise A4 paper, sheet glass, plastic bottle, pop can, copper sheet, aluminium foil, desk or laboratory table surface, promptly can be observed and manifest the fingerprint lines, the magnetic fluorescence powder is under ultraviolet source, the fingerprint lines that manifests the orange-colored light of setting out, taking pictures with digital camera gets final product.
2. the preparation method of magnetic ferroferric oxide nanometer powder is characterized in that concrete steps are as follows:
FeCl
24H
2O and FeCl
36H
2O is made into mixed solution, wherein FeCl
24H
2O and FeCl
36H
2The amount of substance of O is than being 1.1-1.3: 2, mixed solution is evenly stirred, be heated to 60-80 ℃ then, and maintenance constant temperature, dense HCl after three times is added drop-wise in the mixed solution fast with dilution, and regulator solution pH=6.5 slowly splashes into mass fraction and be 20% NaOH again, pH is transferred to 10-11, react after 2-3 hour, be cooled to room temperature, settlement separate with strong magnet to remove impurity, use distilled water wash, repeat 4-5 time, until pH value of solution=7,40-60 ℃ of vacuum drying then, obtain the magnetic ferroferric oxide nanometer powder, can be directly used in manifesting of laten fingerprints.
3. the preparation method of magnetic silica microballoon powder is characterized in that concrete steps are as follows:
At first with Fe
3O
4Nanometer powder is in 4: 1 water and alcoholic acid mixed solution standby for the 0.2-1% ultra-sonic dispersion to volume ratio by mass volume ratio, the ethyl orthosilicate of 2-10ml is added in the 15-50ml alcoholic solution be mixed with solution one; Ammonia, 10-30ml ethanol, 2-10ml Fe with 5-20ml
3O
4Be mixed into solution two, under the room temperature, two solution mix rapidly under electronic stirring, react after 4-20 hour, the product that obtains is settlement separate to remove impurity with strong magnet, clean 4-5 time with secondary water, dry, just obtain the magnetic silica microballoon powder of Dark grey nucleocapsid structure.The big I of silicon dioxide microsphere particle diameter is by TEOS in the solution, ammonia, and the difference of the ratio of water is regulated, and the size range that obtains can be between the 10-100 micron.Can be directly used in manifesting of laten fingerprints.
4. the preparation method of magnetic fluorescent silicon dioxide nanometer powder is characterized in that concrete steps are as follows:
At first with Fe
3O
4Nanometer powder is in 4: 1 water and alcoholic acid mixed solution standby for the 0.2-1% ultra-sonic dispersion to volume ratio by mass volume ratio.Microemulsion is made up of following reagent: room temperature, under electronic stirring, cyclohexane extraction, hexanol, three kinds of solution mix homogeneously of triton x-100 add Fe
3O
4Ultrasonic mixed liquor in water and ethanol, add ruthenium pyridine or 1 then, aqueous solution and the ethyl orthosilicate of 10-phenanthroline ruthenium 20mM mix and stir after 20-30 minute, the adding mass fraction is 25% ammonia, mentioned reagent cyclohexane extraction, hexanol, triton x-100, Fe
3O
4Mixed liquor, ruthenium pyridine or 1, the volume ratio of 10-phenanthroline ruthenium aqueous solution, ethyl orthosilicate and ammonia was followed successively by 7.5: 1.8: 1.77: 2-5: 0.48: 0.1-0.5: 0.06-0.3, mixed solution reacts after 20-24 hour under magnetic agitation, add and the isopyknic acetone breakdown of emulsion of mixed solution, the product that obtains is settlement separate to remove impurity with strong magnet, clean 4-5 time with secondary water, dry, just obtain the magnetic fluorescent silicon dioxide nanometer powder of pale brown color nucleocapsid structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102177058A CN101690663B (en) | 2009-09-24 | 2009-09-24 | Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102177058A CN101690663B (en) | 2009-09-24 | 2009-09-24 | Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101690663A true CN101690663A (en) | 2010-04-07 |
| CN101690663B CN101690663B (en) | 2011-12-21 |
Family
ID=42079414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102177058A Expired - Fee Related CN101690663B (en) | 2009-09-24 | 2009-09-24 | Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101690663B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749314A (en) * | 2012-07-12 | 2012-10-24 | 陕西师范大学 | Visualization of fingerprints on skin with Fe3O4/SiO2@ Gd2O3: eu, bi material |
| CN102757786A (en) * | 2012-07-12 | 2012-10-31 | 陕西师范大学 | Fe3O4/SiO2@ Gd2O3: eu, bi magnetic-fluorescent nanomaterials |
| CN103622701A (en) * | 2012-08-23 | 2014-03-12 | 武汉哇哇噻纳技术开发有限公司 | Method for showing fingerprints through silanization nanometer magnetic powder |
| CN104337522A (en) * | 2014-11-24 | 2015-02-11 | 中国刑事警察学院 | Method for displaying latent fingerprints by adopting fluorescent dye-modified nano particles |
| CN105326509A (en) * | 2015-10-16 | 2016-02-17 | 同济大学 | Magnetic fingerprint revealing powder and preparation method and application thereof |
| CN105411598A (en) * | 2015-11-30 | 2016-03-23 | 同济大学 | TiO2/C reinforced fingerprint appearing magnetic powder and preparation method and application thereof |
| CN105527427A (en) * | 2016-01-19 | 2016-04-27 | 南昌大学 | Method for fast detecting Listeria monocytogenes |
| CN106175785A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | Use the modified stearic black magnetic fingerprint manifestation powder of Graphene and preparation thereof |
| CN106175784A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | A kind of white magnetic fingerprint manifestation powder and preparation method thereof |
| CN107768061A (en) * | 2017-01-06 | 2018-03-06 | 华侨大学 | A kind of preparation method of bag silicon nanoscale magnetic bead |
| CN108315011A (en) * | 2016-11-15 | 2018-07-24 | 香港科技大学 | Fingerprint imaging composition and its application |
| CN108498103A (en) * | 2018-03-30 | 2018-09-07 | 李刚 | Fingerprint on site and its pollution-free dual extracting methods of DNA |
| CN113528118A (en) * | 2021-07-13 | 2021-10-22 | 复旦大学 | Magnetic fluorescent nano-particles and preparation method and application thereof |
| CN113925500A (en) * | 2021-10-15 | 2022-01-14 | 沈阳理工大学 | Fingerprint appearing powder and preparation method and application thereof |
| CN115584259A (en) * | 2022-09-30 | 2023-01-10 | 中国科学技术大学 | Magnetic up-conversion latent fingerprint developer, preparation method thereof and latent fingerprint analysis method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067571A (en) * | 1991-06-07 | 1993-01-06 | 深圳市人民警察学校 | A kind of preparation method of the not carcinogenic Magnaglo that manifests laten fingerprints |
| GB0516272D0 (en) * | 2005-08-09 | 2005-09-14 | Univ Sunderland | Hydrophobic silica nanoparticles |
| CN101477058B (en) * | 2009-01-20 | 2011-06-15 | 东北师范大学 | Method for using silicon dioxide and polystyrene functionalized particle in hidden fingerprint appearance |
-
2009
- 2009-09-24 CN CN2009102177058A patent/CN101690663B/en not_active Expired - Fee Related
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757786A (en) * | 2012-07-12 | 2012-10-31 | 陕西师范大学 | Fe3O4/SiO2@ Gd2O3: eu, bi magnetic-fluorescent nanomaterials |
| CN102749314B (en) * | 2012-07-12 | 2014-10-22 | 陕西师范大学 | Visualization of fingerprints on skin with Fe3O4/SiO2@ Gd2O3: eu, bi material |
| CN102749314A (en) * | 2012-07-12 | 2012-10-24 | 陕西师范大学 | Visualization of fingerprints on skin with Fe3O4/SiO2@ Gd2O3: eu, bi material |
| CN103622701A (en) * | 2012-08-23 | 2014-03-12 | 武汉哇哇噻纳技术开发有限公司 | Method for showing fingerprints through silanization nanometer magnetic powder |
| CN103622701B (en) * | 2012-08-23 | 2018-08-10 | 聂棱 | Silanization nano-magnetic powder shows fingerprint method |
| CN104337522B (en) * | 2014-11-24 | 2017-01-11 | 中国刑事警察学院 | Method for displaying latent fingerprints by adopting fluorescent dye-modified nano particles |
| CN104337522A (en) * | 2014-11-24 | 2015-02-11 | 中国刑事警察学院 | Method for displaying latent fingerprints by adopting fluorescent dye-modified nano particles |
| CN105326509A (en) * | 2015-10-16 | 2016-02-17 | 同济大学 | Magnetic fingerprint revealing powder and preparation method and application thereof |
| CN105411598A (en) * | 2015-11-30 | 2016-03-23 | 同济大学 | TiO2/C reinforced fingerprint appearing magnetic powder and preparation method and application thereof |
| CN105411598B (en) * | 2015-11-30 | 2018-08-24 | 同济大学 | A kind of TiO2/ C strengthens fingerprint manifestation magnetic powder and the preparation method and application thereof |
| CN105527427B (en) * | 2016-01-19 | 2017-11-03 | 南昌大学 | A kind of method of quick detection Listeria monocytogenes |
| CN105527427A (en) * | 2016-01-19 | 2016-04-27 | 南昌大学 | Method for fast detecting Listeria monocytogenes |
| CN106175784A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | A kind of white magnetic fingerprint manifestation powder and preparation method thereof |
| CN106175785A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | Use the modified stearic black magnetic fingerprint manifestation powder of Graphene and preparation thereof |
| CN108315011B (en) * | 2016-11-15 | 2021-04-09 | 香港科技大学 | Composition for developing fingerprint and application thereof |
| CN108315011A (en) * | 2016-11-15 | 2018-07-24 | 香港科技大学 | Fingerprint imaging composition and its application |
| CN107768061B (en) * | 2017-01-06 | 2019-08-23 | 华侨大学 | A kind of preparation method of packet silicon nanoscale magnetic bead |
| CN107768061A (en) * | 2017-01-06 | 2018-03-06 | 华侨大学 | A kind of preparation method of bag silicon nanoscale magnetic bead |
| CN108498103A (en) * | 2018-03-30 | 2018-09-07 | 李刚 | Fingerprint on site and its pollution-free dual extracting methods of DNA |
| CN113528118A (en) * | 2021-07-13 | 2021-10-22 | 复旦大学 | Magnetic fluorescent nano-particles and preparation method and application thereof |
| CN113925500A (en) * | 2021-10-15 | 2022-01-14 | 沈阳理工大学 | Fingerprint appearing powder and preparation method and application thereof |
| CN113925500B (en) * | 2021-10-15 | 2023-09-29 | 沈阳理工大学 | Fingerprint developing powder and preparation method and application thereof |
| CN115584259A (en) * | 2022-09-30 | 2023-01-10 | 中国科学技术大学 | Magnetic up-conversion latent fingerprint developer, preparation method thereof and latent fingerprint analysis method |
| CN115584259B (en) * | 2022-09-30 | 2023-10-10 | 中国科学技术大学 | Magnetic up-conversion latent fingerprint developer, preparation method thereof and latent fingerprint analysis method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101690663B (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101690663B (en) | Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide | |
| CN101477058B (en) | Method for using silicon dioxide and polystyrene functionalized particle in hidden fingerprint appearance | |
| Becue et al. | Use of stains to detect fingermarks | |
| CN101485571A (en) | Method for developing latent finger prints using zinc sulphide and zinc oxide nanoparticles | |
| CN101703404B (en) | Method for showing fingerprints on various object surfaces and keeping DNA information | |
| King et al. | NIR− NIR fluorescence: A new genre of fingermark visualisation techniques | |
| CN105907389A (en) | Preparation methods of noble-metal nanocluster development reagents and sweat fingerprint development method | |
| CN103431867A (en) | Method for displaying latent fingerprints on fluorogold nano-cluster protected by protein | |
| Peng et al. | Characterization of a novel Co2TiO4 nanopowder for the rapid identification of latent and blood fingerprints | |
| Leśniewski | Hybrid organic–inorganic silica based particles for latent fingermarks development: A review | |
| CN103784149A (en) | Method for developing latent fingerprints through multi-metal deposition technology | |
| CN104382600B (en) | Two-step latent fingerprint manifesting method based on nano-particles | |
| Kanodarwala et al. | Fingermark detection using upconverting nanoparticles and comparison with cyanoacrylate fuming | |
| CN104337522B (en) | Method for displaying latent fingerprints by adopting fluorescent dye-modified nano particles | |
| Brittain | Attenuated Total reflection Fourier transform infrared (ATR FT-IR) spectroscopy as a forensic method to determine the composition of inks used to print the United States one-cent blue Benjamin Franklin postage stamps of the 19th century | |
| CN102920462A (en) | Surface functionalization nanometer upconversion materials used for display of latent fingerprints | |
| Fan et al. | Dye-soaked cotton pads for latent blood fingerprint development | |
| CN105411598A (en) | TiO2/C reinforced fingerprint appearing magnetic powder and preparation method and application thereof | |
| WO2008019161A9 (en) | Fuel identification with surface enhanced raman spectroscopy tags | |
| CN107163931A (en) | Application process of the fluorescence conjugated oligomer silica composite nanoparticle in latent print development | |
| CN104783806B (en) | A kind of method that fluorescence copper colloidal sol is used for developing latent finger printss | |
| Lennard | Fingerprint detection: future prospects | |
| CN106073795B (en) | Gold nanoclusters Sweat latent fingerprint visualization reagent preparation method and Sweat latent fingerprint process for show | |
| Yano et al. | Development of a modified p-dimethylaminocinnamaldehyde solution for touch DNA analysis and its application to STR analysis | |
| Zhai et al. | ZnO@ SiO2 Nanocapsules: Efficient Fluorescence for Latent Fingerprint Detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20120924 |