CN105796113B - A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker - Google Patents
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker Download PDFInfo
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- CN105796113B CN105796113B CN201610129297.0A CN201610129297A CN105796113B CN 105796113 B CN105796113 B CN 105796113B CN 201610129297 A CN201610129297 A CN 201610129297A CN 105796113 B CN105796113 B CN 105796113B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
- A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
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Abstract
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, it is related to a kind of fingerprint detection method, sticky fluorescent carbon nano-particles negated first, in mass ratio 0.1% is combined into nano fluorescent starch with nano-starch, starch and carbon nano-particles compound are dried, fingerprint detection is used for.The shown fingerprint of the powder has photoluminescent property, there is preferable luminescent properties under 365nm ultraviolet lamps, and can directly take pictures imaging；The powder also has photoluminescent property under other wavelength illuminations, and can take pictures imaging after being filtered by optical filter；Also there is good up-conversion fluorescence to shine under the irradiation of infrared light, passes through optical filtering blur-free imaging.The material source that the present invention uses is extensive, and synthetic method is simple, and required equipment price is low, and detection speed is fast, and fluorescence starch property is stablized, and is easy to long-term preservation, and the high Wavelength tunable of luminous intensity, can effectively avoid the interference of the background and colored background of fluorescent dye.
Description
Technical field
The present invention relates to a kind of fingerprint detection methods, more particularly to the finger that a kind of base carbon nano-particles are fluorescent marker
Marks detection method.
Background technology
Fingerprint has consequence as the important material evidence of scene of a crime in criminal investigation field.Fingerprint is divided into several types,
Such as：Blood fingerprint, sweat impression of the hand.Sweat impression of the hand is difficult to directly detect, and is usually developed.It is the problem of most critical in fingerprint technique
The appearing technique of latent fingerprint.Appearing Techniques of Human Fingerprints is developed so far the history of existing upper a century, brush dust method, smoked aobvious not only occurs
Common method in the practical case inspection such as method, ninhydrin method, and many researchers detected advanced analysis in recent years
Technology is used for fingerprint detection, such as：Fluorescence method.Fluorescent method makes to be combined fluorescent marker with fingerprint, makes fingerprint in the UV lamp
Fluorescence is sent out, the sensitivity of detection is greatly improved.Fluorescent method divides fluorescent dye determination, quantum point methods etc..Fluorescent dye method
It is to be combined fluorescent dye with the powder of traditional powder method, fingerprint is measured with powder method.This method has a disadvantage that：Fluorescence contaminates
Expect higher price, there is carcinogenesis.Quantum dot method is mainly to carry out fingerprint detection using the fluorescent characteristic of quantum dot, by using
Quantum dot solution makes print development；Or the nano-complex powder using quantum dot, it is tested using powder method, this method
High sensitivity, but there is quantum dot stronger toxicity, problem of environmental pollution can not avoid, while can be to the body of professional technician
Body health causes to seriously endanger.
Fluorescent carbon nano-particles are also a kind of nano material, and fluorescence property can match in excellence or beauty with quantum dot.Due to its is nontoxic,
Environmental-friendly, the transmitting upper conversion function adjustable and outstanding with excitating performance is increasingly paid attention to by scientific circles.But it is glimmering
The fluorescence of light carbon nano-particles can only be sent out in solution state, and the carbon nano-particles fluorescence after drying completely disappears, because carbon is received
Rice corpuscles is reunited in dry conditions, so fluorescent carbon nano-particles may not apply to fingerprint detection.But fluorescent carbon is received
Rice corpuscles can be kept with some polyalcohols and natural materials compound tense solid fluorescence, as carbon nano-particles are compound with polyethylene glycol
There can be good solid fluorescence, but polyethylene glycol is difficult to be prepared into powder, compound is sticky, it is difficult to form particle.The present invention
It is using its this feature that carbon nano-particles and native starch are compound and be applied to fingerprint detection.The present invention have detection at
This is cheap, does not have murder by poisoning, the advantage that detection method is simple, rapid to testing staff and environment, is cadmium sulfide, CdSe quantum dots
The substitute of powder method.In addition the excitation of fluorescence starch and launch wavelength are adjustable, can avoid the fluorescence dye on detection object surface
The interference such as material, colored background substantially increase range and the sensitivity of detection.
Invention content
The purpose of the present invention is to provide the fingerprint detection method that a kind of base carbon nano-particles are fluorescent marker, this method
By a kind of using carbon nano-particles as the fingerprint fluorescent detection method of luminous marker, do not sent out after solving carbon nano-particles drying
The problems such as light, quantum dot nano particle are toxic, oxidizable, fluorescent dye colored background interferes.By adjusting excitation wavelength, energy
Enough effectively improve detection sensitivity.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, and the method includes following procedure：It will be non-
Solvent acetone, which is added, in thick carbon nano-particles and nano-starch carries out simple ultrasonic agitation and is allowed to compound, it is compound after starch
For fluorescence starch；Using nano fluorescent starch as marker, powder brush method shows latent property fingerprint, is taken pictures under excitation light source
Picture, you can；
It is as follows：
1）The preparation of fluorescence starch：0. 1 grams of negated viscous thick solid carbon nano-particles are mixed with 100 grams of nano-starch
Water and 50 milliliters of acetone are added, is transferred in surface plate, is placed on ultrasonic cleaning machine and stirs 30 minutes, natural drying one day, then
Drying 3 days in drier are placed in, faint yellow starch powder is obtained, gained starch has fluorescence, is fluorescence starch；
2）The detection of fingerprint：Fingerprint provider washes one's hands with soap three times, naturally dry；It is gently rubbed in forehead with finger,
Impression of the hand is restrained on object；Above-mentioned fluorescence starch is taken, fingerprint surface is distributed in, in finger-print region visible starch attachment, with washing ear
Ball gently blows away extra starch；Fluorescence starch fingerprint latent image is placed under radiation source, imaging of taking pictures；In 365nm ultraviolet lamps
Lower direct imaging is taken pictures, and needs to remove exciting light, imaging of taking pictures using filter under other wavelength.
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, and the fluorescence starch is luminous
Object.
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, and the fluorescence starch is fluorescence mark
Remember object.
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, described using fluorescence starch as mark
Remember that object, powder brush method show latent property fingerprint, imaging of taking pictures under excitation light source.
A kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, and the excitation light source is in 320-
900 nanometers of generation fluorescence.
Advantages of the present invention is with effect：
This method, using carbon nano-particles as the fingerprint fluorescent detection method of luminous marker, solving carbon nanometer by a kind of
The problems such as particle does not shine after drying, quantum dot nano particle is toxic, oxidizable, fluorescent dye colored background interferes.Pass through tune
Whole excitation wavelength can effectively improve detection sensitivity.
Description of the drawings
Fig. 1 is that the latent property fingerprint of glass surface uses fluorescence starch development fluorescence photo（Corresponding embodiment 1）；I.e. 365 receive
Fingerprint fluorescent photo under rice ultraviolet lamp；
Fig. 2 is that the latent property fingerprint on poster paper surface uses fluorescence starch development up-conversion fluorescence photo（Corresponding embodiment
2）；That is the fingerprint fluorescent photo under 2 850 nanometers of infrared lights.
Specific implementation mode
The present invention is described in detail for illustrated embodiment below in conjunction with the accompanying drawings.
The present invention is using a kind of base carbon nano-particles as the fingerprint detection method of fluorescent marker.By non-thick carbon nanometer
Particle is mixed with nano-starch by 0.1% mass ratio, and a small amount of water is added and solvent acetone carries out simple ultrasonic agitation and is allowed to multiple
Close, it is compound after starch become fluorescence starch through dry.Using nano fluorescent starch as marker, powder brush method shows latent property and refers to
Line, imaging of taking pictures under excitation light source.
To be better described technical scheme of the present invention, spy provides following embodiment, but the implementation of the present invention and not only limits
In this.
Embodiment 1
1）The preparation of fluorescence starch：0. 1 grams of negated viscous thick solid carbon nano-particles are mixed with 100 grams of nano-starch
A small amount of water and 50 milliliters of acetone is added, is transferred in surface plate, is placed on ultrasonic cleaning machine and stirs 30 minutes, spontaneously dries one day,
Drying 3 days in drier are subsequently placed in, faint yellow starch powder is obtained, gained starch has fluorescence, is fluorescence starch.
2）The detection of fingerprint：Fingerprint provider washes one's hands with soap three times, naturally dry.It is gently rubbed in forehead with finger,
Impression of the hand is restrained on object.Above-mentioned fluorescence starch is taken, fingerprint surface is distributed in, in finger-print region visible starch attachment, with washing ear
Ball gently blows away extra starch.Fluorescence starch fingerprint latent image is placed under radiation source, imaging of taking pictures.In 365nm ultraviolet lamps
Lower direct imaging is taken pictures, and fingerprint shines in sapphirine.This example is suitable for the smooth inorganics object fingerprint surface such as glass, metal, ceramic tile
It measures.
Embodiment 2
1）The preparation of fluorescence starch：0. 1 grams of negated viscous thick solid carbon nano-particles are mixed with 100 grams of nano-starch
A small amount of water and 50 milliliters of acetone is added, is transferred in surface plate, is placed on ultrasonic cleaning machine and stirs 30 minutes, spontaneously dries one day,
Drying 3 days in drier are subsequently placed in, faint yellow starch powder is obtained, gained starch has fluorescence, is fluorescence starch.
2）The detection of fingerprint：Fingerprint provider washes one's hands with soap three times, naturally dry.It is gently rubbed in forehead with finger,
Impression of the hand is restrained on object.Above-mentioned fluorescence starch is taken, fingerprint surface is distributed in, in finger-print region visible starch attachment, with washing ear
Ball gently blows away extra starch.Fluorescence starch fingerprint latent image is placed under radiation source, imaging of taking pictures.In 850nm infrared lights
Under the irradiation of source, take pictures imaging through 450 nanometers of upper logical colour filters, fingerprint is in yellow green.This example is suitable in copy paper, extensively
The object fingerprint surface that paper etc. has intense fluorescence to interfere under 365 nanometers of ultraviolet lamps is accused to measure.
Embodiment 3
1）The preparation of fluorescence starch：0. 1 grams of negated viscous thick solid carbon nano-particles are mixed with 100 grams of nano-starch
A small amount of water and 50 milliliters of acetone is added, is transferred in surface plate, is placed on ultrasonic cleaning machine and stirs 30 minutes, spontaneously dries one day,
Drying 3 days in drier are subsequently placed in, faint yellow starch powder is obtained, gained starch has fluorescence, is fluorescence starch.
2）The detection of fingerprint：Fingerprint provider washes one's hands with soap three times, naturally dry.It is gently rubbed in forehead with finger,
Impression of the hand is restrained on object.Above-mentioned fluorescence starch is taken, fingerprint surface is distributed in, in finger-print region visible starch attachment, with washing ear
Ball gently blows away extra starch.Fluorescence starch fingerprint latent image is placed under radiation source, imaging of taking pictures.In 420nm laser lights
It under the irradiation of source, takes pictures imaging through 500 nanometers of upper logical colour filters, fingerprint is green.This example is suitable in plastics, bank note, answers
The object fingerprint surface that floor etc. has intense fluorescence to interfere under 365 nanometers of ultraviolet lamps is closed to measure, using laser light source fingerprint at
As better.
The latent property fingerprint that attached drawing 1 gives glass surface uses fluorescence starch development fluorescence photo, excitation light source 365
Nanometer ultraviolet lamp.Figure is clear, and details in fingerprint is obviously distinguishable, it was demonstrated that this method has practicability.
The latent property fingerprint that attached drawing 2 gives poster paper surface uses fluorescence starch development up-conversion fluorescence photo, exciting light
Source is 850 nanometers of infrared lamps.Since there are a large amount of fluorescers on poster paper surface, under 365 nanometers of ultraviolet lamps fingerprint fluorescent development with
Background fluorescence can not be differentiated, and the use of 850 nanometers of infrared lamps be excitation light source, fluorescent dye is at this wavelength without shining, through 450
Fingerprint graph is clear after nm filter filters, and details in fingerprint is obviously distinguishable, it was demonstrated that this method anti-interference.
Claims (4)
1. a kind of base carbon nano-particles are the fingerprint detection method of fluorescent marker, which is characterized in that the method includes following
Process：The simple ultrasonic agitation of solvent acetone progress is added with nano-starch in non-thick carbon nano-particles and is allowed to compound, it is multiple
Starch after conjunction is fluorescence starch；Using nano fluorescent starch as marker, powder brush method shows latent property fingerprint, in excitation light source
Under take pictures imaging, you can；
It is as follows：
1）The preparation of fluorescence starch：0. 1 grams of negated thick solid carbon nano-particles are mixed with 100 grams of nano-starch is added water
It with 50 milliliters of acetone, is transferred in surface plate, is placed on ultrasonic cleaning machine and stirs 30 minutes, spontaneously dry one day, be subsequently placed in dry
It is 3 days dry in dry device, faint yellow starch powder is obtained, gained starch has fluorescence, is fluorescence starch；
2）The detection of fingerprint：Fingerprint provider washes one's hands with soap three times, naturally dry；It is gently rubbed in forehead with finger, in visitor
Impression of the hand is restrained on body；Above-mentioned fluorescence starch is taken, fingerprint surface is distributed in, it is light with ear washing bulb in the visible starch attachment of finger-print region
Extra starch is removed in featheriness；Fluorescence starch fingerprint latent image is placed under radiation source, imaging of taking pictures；It is straight under 365nm ultraviolet lamps
It is connected into as taking pictures, needs to remove exciting light, imaging of taking pictures using filter under other wavelength.
2. a kind of base carbon nano-particles according to claim 1 are the fingerprint detection method of fluorescent marker, feature exists
In the fluorescence starch is shiner.
3. a kind of base carbon nano-particles according to claim 1 are the fingerprint detection method of fluorescent marker, feature exists
In the fluorescence starch is fluorescent marker.
4. a kind of base carbon nano-particles according to claim 1 are the fingerprint detection method of fluorescent marker, feature exists
In the excitation light source generates fluorescence at 320-900 nanometers.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106634980B (en) * | 2016-11-23 | 2019-12-24 | 沈阳大学 | Preparation and application method of latent fingerprint appearing luminous nano powder |
| CN106957644B (en) * | 2017-03-13 | 2019-03-19 | 武汉大学 | A kind of fingerprint detection probe based on long-persistence nano material and preparation method thereof and the application in latent fingerprint detection |
| CN108659836B (en) * | 2018-07-23 | 2021-06-01 | 辽宁大学 | High-quantum-yield nitrogen-sulfur co-doped fluorescent carbon dot and preparation method and application thereof |
| CN109880614A (en) * | 2019-03-16 | 2019-06-14 | 复旦大学 | Carbon dots-starch composite phosphor and preparation method thereof for fingerprint detection of diving |
| CN112280556B (en) * | 2020-11-14 | 2022-12-09 | 西北农林科技大学 | Preparation of phosphate radical responsive carbon quantum dots and application of phosphate radical responsive carbon quantum dots in fingerprint fluorescence identification |
Citations (5)
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| GB2051845B (en) * | 1977-10-31 | 1982-10-06 | Gen Medical Co | Sensitized substrates or fluids for recording sweat gland activity or fingerprints |
| CN101697873A (en) * | 2009-09-30 | 2010-04-28 | 中国人民公安大学 | Method for developing latent fingerprints by adopting nano zinc oxide |
| CN102746845A (en) * | 2012-07-20 | 2012-10-24 | 中国地质大学（武汉） | Rare earth long-persistence luminescent powder, preparation method and application thereof |
| CN103466600A (en) * | 2013-09-26 | 2013-12-25 | 沈阳大学 | Preparation method of environment-friendly low-toxic fluorescent carbon nano particle liquor |
| EP1919361B1 (en) * | 2005-08-09 | 2014-03-12 | University of Sunderland | Fingerprint analysis using mass spectrometry |
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2016
- 2016-03-08 CN CN201610129297.0A patent/CN105796113B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2051845B (en) * | 1977-10-31 | 1982-10-06 | Gen Medical Co | Sensitized substrates or fluids for recording sweat gland activity or fingerprints |
| EP1919361B1 (en) * | 2005-08-09 | 2014-03-12 | University of Sunderland | Fingerprint analysis using mass spectrometry |
| CN101697873A (en) * | 2009-09-30 | 2010-04-28 | 中国人民公安大学 | Method for developing latent fingerprints by adopting nano zinc oxide |
| CN102746845A (en) * | 2012-07-20 | 2012-10-24 | 中国地质大学（武汉） | Rare earth long-persistence luminescent powder, preparation method and application thereof |
| CN103466600A (en) * | 2013-09-26 | 2013-12-25 | 沈阳大学 | Preparation method of environment-friendly low-toxic fluorescent carbon nano particle liquor |
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