EP1516345A1 - Monodisperse, magnetische nanokolloide einstellbarer grösse und verfahren zu deren herstellung - Google Patents
Monodisperse, magnetische nanokolloide einstellbarer grösse und verfahren zu deren herstellungInfo
- Publication number
- EP1516345A1 EP1516345A1 EP03722460A EP03722460A EP1516345A1 EP 1516345 A1 EP1516345 A1 EP 1516345A1 EP 03722460 A EP03722460 A EP 03722460A EP 03722460 A EP03722460 A EP 03722460A EP 1516345 A1 EP1516345 A1 EP 1516345A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- magnetic particles
- particle size
- cobalt
- nickel
- 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.)
- Withdrawn
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 40
- 239000006249 magnetic particle Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 8
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000003860 storage Methods 0.000 claims abstract description 4
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 230000005415 magnetization Effects 0.000 claims description 11
- 238000001149 thermolysis Methods 0.000 claims description 9
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 150000002902 organometallic compounds Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 125000005234 alkyl aluminium group Chemical group 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 150000001728 carbonyl compounds Chemical class 0.000 claims description 2
- 229910021482 group 13 metal Inorganic materials 0.000 claims description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 2
- -1 olefin compounds Chemical class 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 238000006303 photolysis reaction Methods 0.000 claims description 2
- 230000015843 photosynthesis, light reaction Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 8
- 239000002771 cell marker Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000012472 biological sample Substances 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 238000005339 levitation Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 31
- 239000007789 gas Substances 0.000 description 27
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 20
- 239000000084 colloidal system Substances 0.000 description 18
- 239000011541 reaction mixture Substances 0.000 description 16
- 239000002244 precipitate Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- 229910052786 argon Inorganic materials 0.000 description 10
- 239000012298 atmosphere Substances 0.000 description 10
- 238000003760 magnetic stirring Methods 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 10
- 238000002845 discoloration Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 238000010992 reflux Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000010414 supernatant solution Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 238000007885 magnetic separation Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 125000002915 carbonyl group Chemical class [*:2]C([*:1])=O 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000011554 ferrofluid Substances 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002122 magnetic nanoparticle Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004627 transmission electron microscopy Methods 0.000 description 2
- 238000006418 Brown reaction Methods 0.000 description 1
- BACYUWVYYTXETD-UHFFFAOYSA-N N-Lauroylsarcosine Chemical compound CCCCCCCCCCCC(=O)N(C)CC(O)=O BACYUWVYYTXETD-UHFFFAOYSA-N 0.000 description 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical class O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 108700004121 sarkosyl Proteins 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/1035—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing by a magnetic field acting on a magnetic liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/30—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/30—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis
- B22F9/305—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis of metal carbonyls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
- H01F1/0045—Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use
- H01F1/0054—Coated nanoparticles, e.g. nanoparticles coated with organic surfactant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- the present invention relates to new, single- and multi-metallic, magnetic colloid particles (for example Fe, Co, Fe / Co) with an average particle size which can be set between 2 nm and approx. 15 nm and a narrow distribution without a separation step (such as magnetic separation) the particle sizes (standard deviation maximum 1.6 nm) and a process for their production.
- the advantage of the new materials is their high saturation magnetization and their special suitability for the production of highly efficient ferrofluids with a low metal concentration and low viscosity.
- Magnetic nanocolloids are sought-after materials for the production of magnetic fluids. These are used in technology as a sealing medium against dust and gases in magnetic fluid seals (liquid O-ring), for the lubrication and bearing of rotating shafts (magnetic levitation bearings) and for magneto-optical information storage. Applications in the medical-pharmaceutical field are, for example, magnetic markers of sick cells and the magnetic cell separation in biological samples, as well as the local application of drugs.
- Giersig (Aust. J. Chem. 2001, 54, pp. 497 - 501) went another way to obtain monodisperse Co-particles with a narrow size distribution from dispersions with high saturation magnetization, using magnetic separation. According to this method, co-colloids with a wide size distribution are first obtained, from which a certain area has to be filtered out by magnetic separation. As a result, the yield of the desired material was very low. According to C. Petit, A. Taleb and MP Pileni (J. Phys. Chem. B, Vol. 103 (11), 1999, pp.
- the magnetization curve (A in FIG. 3) of a dispersion of 10 nm cobalt particles produced according to the invention shows a magnetization of 11.6 T at a concentration of only 0.6 vol.% Cobalt.
- the setting of the average particle size is controlled by the alkyl radical and the concentration of the organometallic compound. Become mixtures When low-valent compounds of different metals are used, multi-metallic magnetic particles (alloy particles) are formed.
- the isolated, monodisperse, magnetic nanocolloids produced by this process are not long-term stable in air, but can easily be protected against total oxidation by an aftertreatment. If the magnetic particles in the organic solvent are subsequently treated by passing air through them or passing them through, magnetic particles are obtained which are resistant to oxidation after drying.
- Cobalt particles which were prepared from CO 2 (CO) s in the presence of Al (C8H-
- the unprotected or post-protected magnetic nanoparticles of either 2 nm to 15 nm, but at least up to 10.5 nm in size can be used in isolated form or with the aid of dispersants (eg Korantin SH from BASF or Sarcosyl from Merck) Bring colloidal into solution and continue to use in the form of magnetic fluids.
- dispersants eg Korantin SH from BASF or Sarcosyl from Merck
- the following examples may be mentioned: sealing medium against dust and gases in magnetic fluid seals (liquid O-ring), lubrication and bearing of rotating shafts (magnetic levitation bearings) as well as magneto-optical information storage, for example in compact and mini disks.
- a cell-compatible layer e.g. gold, cf.
- WO 99/41758 on the particle surface are also suitable for the magnetic in-vitro labeling of cells and can be used for the magnetic separation of labeled cells in biological samples or for the local application of medicaments.
- the monodispersity of the magnetic nanoparticles produced according to the invention is of decisive advantage for all areas of application.
- Example 1 Co-colloids of uniform size (10 nm) by thermolysis of CO 2 (CO) s in the presence of AI (CgH-
- 7) 3 (atomic ratio Co: AI 12: 1)
- Example 4 Co-colloids of uniform size (5.4 nm) from CO 2 (CO) 8 by thermolysis in the presence of Al (C8H-
- 7) 3 (atomic ratio Co: AI 1: 2)
- Example 6 Monodisperse Co-Colloid (3.4 nm) by thermolysis of CO 2 (CO) s in the presence of (C ⁇ Hg ⁇ AIH
- Example 7 Comparative example: Co-colloids according to the conventional method
- Example 8 Monodisperse Ni colloid (2.5 nm) by thermolysis of Ni (COD) 2 in the presence of (C2Hs) 3 AI
- Ni particles is mixed with 2 ml (1.77 g, 5 mmol) of the dispersant KorantinSH (BASF) in 50 ml of Toiuol, a deep black-brown colored Ni magnetic fluid with a particle size of 2.5 nm ⁇ 0.8 nm is obtained.
- KorantinSH dispersantinSH
- Example 9 Co-colloids of uniform size (10 nm) from CO 2 (CO) s in the presence of Al (C8H-
- 7) 3 (atomic ratio Co: Al 10: 1) and post-treatment with air
- reaction mixture was stirred for a further 16 h while cooling to room temperature.
- the reaction mixture was then oxidized by passing air through (approx. 5 h) and stirred for approx. 16 h. After the precipitate had settled for 3 h, the supernatant solution was decanted from the precipitate.
- Example 10 Co-colloids of uniform size (8 nm) from CO 2 (CO) 8 in the presence of Al (C8H-
- 7) 3 (atomic ratio Co: Al 5: 1) and post-treatment with air
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Colloid Chemistry (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10227779A DE10227779A1 (de) | 2002-06-21 | 2002-06-21 | Monodisperse, magnetische Nanokolloide einstellbarer Größe und Verfahren zu deren Herstellung |
| DE10227779 | 2002-06-21 | ||
| PCT/EP2003/003814 WO2004001776A1 (de) | 2002-06-21 | 2003-04-12 | Monodisperse, magnetische nanokolloide einstellbarer grösse und verfahren zu deren herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1516345A1 true EP1516345A1 (de) | 2005-03-23 |
Family
ID=29719339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03722460A Withdrawn EP1516345A1 (de) | 2002-06-21 | 2003-04-12 | Monodisperse, magnetische nanokolloide einstellbarer grösse und verfahren zu deren herstellung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20060037434A1 (ja) |
| EP (1) | EP1516345A1 (ja) |
| JP (1) | JP2005530354A (ja) |
| AU (1) | AU2003229654A1 (ja) |
| CA (1) | CA2489975A1 (ja) |
| DE (1) | DE10227779A1 (ja) |
| WO (1) | WO2004001776A1 (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3930495B2 (ja) | 2004-06-16 | 2007-06-13 | 三菱重工業株式会社 | ニッケル超微粒子分散液体ナトリウムの製造方法、装置、液体ナトリウムの漏洩検出方法 |
| CA2500077A1 (en) * | 2005-03-09 | 2006-09-09 | Chemical Vapour Metal Refining Inc. | Production of ultra fine transition metal powders |
| WO2008034062A2 (en) * | 2006-09-15 | 2008-03-20 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Method for making cobalt nanomaterials |
| BRPI0800207B1 (pt) * | 2008-01-24 | 2018-01-09 | Petroleo Brasileiro S.A. - Petrobras | Catalisador metálico e método para a produção de catalisador metálico |
| US9384862B2 (en) | 2012-06-22 | 2016-07-05 | Ge-Hitachi Nuclear Energy Americas Llc | Method of fabricating liquid-metal coolants for nuclear reactors |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE977064C (de) * | 1950-05-12 | 1965-01-07 | Gen Aniline & Film Corp | Verfahren zur Herstellung von Metallen gleichmaessiger, sehr kleiner Teilchengroesse durch thermische Zersetzung von Metallcarbonylen |
| US2744040A (en) * | 1952-03-25 | 1956-05-01 | Gen Aniline & Film Corp | Process of preparing iron powder for magnetic cores |
| DE1084395B (de) * | 1952-12-03 | 1960-06-30 | Gen Aniline & Film Corp | Verfahren zur Verbesserung der elektromagnetischen Eigenschaften von Carbonyl-Eisenpulver |
| US3856580A (en) * | 1973-06-22 | 1974-12-24 | Gen Electric | Air-stable magnetic materials and method |
| DE3934351A1 (de) * | 1989-10-14 | 1991-04-18 | Studiengesellschaft Kohle Mbh | Verfahren zur herstellung von mikrokristallinen bis amorphen metall- bzw. legierungspulvern und ohne schutzkolloid in organischen solventien geloesten metallen bzw. legierungen |
| EP0672765B1 (en) * | 1994-03-14 | 1999-06-30 | Studiengesellschaft Kohle mbH | Electrochemical reduction of metal salts as a method of preparing highly dispersed metal colloids and substrate fixed metal clusters by electrochemical reduction of metal salts |
| DE19654864A1 (de) * | 1996-02-27 | 1997-08-28 | Thomas Dipl Ing Haehndel | Magnetofluid mit einer Sättigungsmagnetisierung von 150 bis 450 mT |
| DE19821968A1 (de) * | 1998-05-18 | 1999-11-25 | Studiengesellschaft Kohle Mbh | Verfahren zur Modifizierung der Dispergiereigenschaften von metallorganisch-prästabilisierten bzw. -vorbehandelten Nanometallkolloiden |
-
2002
- 2002-06-21 DE DE10227779A patent/DE10227779A1/de not_active Withdrawn
-
2003
- 2003-04-12 CA CA002489975A patent/CA2489975A1/en not_active Abandoned
- 2003-04-12 AU AU2003229654A patent/AU2003229654A1/en not_active Abandoned
- 2003-04-12 JP JP2004514619A patent/JP2005530354A/ja active Pending
- 2003-04-12 EP EP03722460A patent/EP1516345A1/de not_active Withdrawn
- 2003-04-12 US US10/518,703 patent/US20060037434A1/en not_active Abandoned
- 2003-04-12 WO PCT/EP2003/003814 patent/WO2004001776A1/de active Search and Examination
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004001776A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003229654A1 (en) | 2004-01-06 |
| US20060037434A1 (en) | 2006-02-23 |
| WO2004001776A1 (de) | 2003-12-31 |
| CA2489975A1 (en) | 2003-12-31 |
| JP2005530354A (ja) | 2005-10-06 |
| DE10227779A1 (de) | 2004-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102100524B1 (ko) | 마이크로에멀젼 및 나노반응기 또는 전달 담체로서의 이들의 용도 | |
| Xu et al. | Encapsulation of nanosized magnetic iron oxide by polyacrylamide via inverse miniemulsion polymerization | |
| Ansari et al. | Synthesis and stability of magnetic nanoparticles | |
| US6531304B1 (en) | Method for modifying the dispersion characteristics of metal organic-prestabilized or pre-treated nanometal colloids | |
| DE60130757T2 (de) | Silizium beschichtete nanopartikel | |
| DE69730492T2 (de) | Herstellungsverfahren einer magnetflüssigkeit und zusammenstellung dafür | |
| DE19612001A1 (de) | Superparamagnetische Teilchen mit vergrößerter R¶1¶-Relaxivität, Verfahren zur Herstellung und deren Verwendung | |
| DE10191871B4 (de) | Ein magnetorheologisches Fluid und ein Verfahren zur Herstellung desselben | |
| DE19822663A1 (de) | Sinteraktive Metall- und Legierungspulver für pulvermetallurgische Anwendungen und Verfahren zu deren Herstellung und deren Verwendung | |
| Demirbas et al. | Preparation of biocompatible and stable iron oxide nanoparticles using anthocyanin integrated hydrothermal method and their antimicrobial and antioxidant properties | |
| Singh et al. | Graphene oxide (GO)/Copper doped Hematite (α-Fe2O3) nanoparticles for organic pollutants degradation applications at room temperature and neutral pH | |
| DE112020003162T5 (de) | Verfahren zur herstellung von porösen kupfer-silber- und kupfer-goldmikroplättchen | |
| EP2134889B1 (de) | Materialsystem und verfahren zur dessen herstellung | |
| Zhang et al. | Heterogeneous Fenton-like magnetic nanosphere coated with vanadium oxide quantum dots for enhanced organic dyes decolorization | |
| EP0237944B1 (de) | Verfahren zur Herstellung von nadelförmigem alpha-Eisen-III-Oxid | |
| DE2705967C2 (de) | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid | |
| EP1516345A1 (de) | Monodisperse, magnetische nanokolloide einstellbarer grösse und verfahren zu deren herstellung | |
| DE2738421A1 (de) | Magnetisches metallisches pulver und dessen verwendung | |
| Oprica et al. | MAGNETIC CONTAMINATION OF ENVIRONMENT--LABORATORY SIMULATION OF MIXED IRON OXIDES IMPACT ON MICROORGANISM CELLS. | |
| DE69513444T2 (de) | Präparation von gemischten ultrafeinen Partikeln aus einer PFPE Mikroemulsion | |
| Hu et al. | Size and shape effects of MnFe 2 O 4 nanoparticles as catalysts for reductive degradation of dye pollutants | |
| DE112016007083T5 (de) | Magnetorheologische flüssigkeit | |
| DE10025964A1 (de) | Katalysatorsystem und seine Verwendung | |
| EP1055242A1 (de) | Edelmetall-geschützte, antikorrosive magnetische nanokolloide | |
| DE69802464T2 (de) | Verfahren zur Herstellung von magnetischer Flüssigkeit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20041216 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WALDOEFNER, NORBERT Inventor name: MATOUSSEVITCH, NINA Inventor name: BRINKMANN, RAINER Inventor name: BRIJOUX, WERNER Inventor name: BOENNEMANN, HELMUT |
|
| 17Q | First examination report despatched |
Effective date: 20090128 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20101103 |