JP5716970B2 - 対象物を認証する方法 - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/1205—Testing spectral properties
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Description
本発明は、文書、または、紙幣、装置もしくは消費財のような他の任意の紙支持体(paper supports)、または、流体(liquids)のような他の支持体(supports)を同定する方法及びシステムに関する。
誘電体核及び金属殻から成るナノ粒子を与える従前の使用法において、世界の種々の研究グループは、腫瘍細胞を熱によって切除するための薬剤に上記ナノ粒子を使用していた。US2002103517-A1およびUS6530944-B2、並びに、いくつかの大衆的な科学文献により表されているように、ナノ粒子が腫瘍内に注入され、その粒子が吸収および回析される波長を有する近赤外線領域(NIR)のレーザーが外部から照射される。ナノ粒子は熱せられ、結果として腫瘍組織は温度の上昇により死滅する。
近赤外線領域(NIR)において特徴的な放射光吸光パターンを有するナノ粒子の利用に基づいて、文書、銀行券、紙幣、高級品のラベルの同定などの、様々な物体の認証システムを提案する。この目的を達成するため、金属層の厚みおよび誘電体核の大きさの関数として変化し得る吸光パターンを示す、二酸化珪素で作られた誘電体核で構成され、金の層で覆われた混成ナノ粒子が合成された。所定の大きさの組合せは、所定の波長(例えば808nm)において規定された吸収を示すが、スペクトルの他の領域においては吸収されない。
上記説明を完全にするため、また、本発明についてのより深い理解を与えるため、好ましい実用的な実施形態に従って、上述の説明の必須部分として図面一式は添付される。次からの図では実例を示しており、発明の範囲を限定するものではない。
図面に照らして、本発明の好ましい実施形態の工程を以下で説明する。
‐ナノ粒子のサイズを測定するための透過型電子顕微鏡検査。誘電体核と金の殻を識別するために、デュアルビーム装置(NovaTM 200 NanoLab)を使用した。
‐電子回折を行い、非結晶二酸化珪素核を囲む金の殻の結晶の性質を確認するための高解像度透過型電子顕微鏡検査。このため、TEI Instruments社製のHRTEM装置を使用した。
‐合成された物質の特定の表面エリアを決定するための、Micromeritis社製の窒素吸着装置を用いた窒素の吸着/脱着。
‐Malvern Zeta Sizer 2000装置を用いた、異なる媒質の中で異なるpHで分散しているナノ粒子の流体力学的サイズを決定するための光子相関分光法。
‐誘電体核上に金の殻を成長させる前の表面上のアミノ基の量を決定するための熱重量分析。
‐物質の基本的な組成を決定するための原子吸収放出分析分光法(ICP)。
‐ナノ粒子の表面を構成する成分の原子番号および発見した結合を決定するためのX線分光法(XPS)。
‐物質と物質の被覆物および官能基と間の相互作用、並びに、結合を決定するための接触室(DRIFT)内でのフーリエ変換赤外線分光法(FTIR)。
‐吸光率を評価し、合成されたナノ粒子が800nmから1200nmの近赤外線領域の光を吸収または散乱するか否かを判定するためのUV-VIS-NIR分光法。
‐光が存在するおよび光がない標準的な保管状態(standard storage conditions)下における、合成物の複製および時間をかけて形成されたナノ粒子の不変性の検討。
Claims (10)
- 誘電体多孔核および金属殻から構成されるナノ粒子、および近赤外線領域の光源を用いて、対象物を認証する方法であって、前記方法は、
ゾル‐ゲル技術によって前記誘電体多孔核を合成し、シーディングおよび2次成長によって金属を材質とする前記金属殻を合成するステップと、
アミノ基で機能化して、順次合成された前記金属殻と前記誘電体多孔核との間に共有結合を生成するステップと、
金属前駆物質での再成長によって前記金属の層を成長させて前記金属殻を画定し、前記ナノ粒子を形づくるステップと、
以下のa)〜i)のサブステップ、すなわち、
a)透過電子顕微鏡によって前記ナノ粒子の大きさを決定するサブステップ、
b)電子回折を利用する高解像度透過電子顕微鏡によって、前記金属殻の結晶の性質を確認するサブステップ、
c)窒素吸着および脱着によって、合成された前記誘電体多孔核の特定の表面積を決定するサブステップ、
d)光子相関分光によって、異なる媒質の中で分散している前記ナノ粒子の流体力学的大きさを測定するサブステップ、
e)熱重量分析によって、前記誘電体多孔核上に前記金属殻を成長させる前の前記誘電体多孔核の表面上のアミノ基の量を測定するサブステップ、
f)原子吸収放出分析分光によって、前記ナノ粒子を構成する物質の基本的な組成を決定するサブステップ、
g)X線分光によって、前記ナノ粒子の表面を構成する成分の原子番号および発見した結合を測定するサブステップ、
h)接触室内でのフーリエ変換赤外線分光によって、前記ナノ粒子を構成する物質、並びに、前記ナノ粒子の被覆物および官能基の間の結合状態や相互作用を決定するサブステップ、および
i)UV-VIS-NIR分光によって吸光率を評価するサブステップ、
によって、先のステップで作成された前記ナノ粒子を特徴づけるステップと、
認証される前記対象物に前記ナノ粒子を添加するステップと、
前記近赤外線領域の光源から所定の波長の光を前記対象物のナノ粒子に照射するステップと、
前記ナノ粒子による前記所定の波長の光の吸収を照合し、前記照合結果により、前記対象物を認証するステップと、を含み、
前記金属殻は金、銀、白金および銅のうちの何れかの金属から作られることを特徴とする方法。 - 前記金属前駆物質は塩化金酸であることを特徴とする請求項1に記載の方法。
- 前記誘電体多孔核は無機酸化物であることを特徴とする請求項1に記載の方法。
- 前記誘電体多孔核の前記無機酸化物は、二酸化珪素または二酸化チタンであることを特徴とする請求項3に記載の方法。
- 前記誘電体多孔核および前記金属殻が異なる寸法であり、ならびに、前記誘電体多孔核および前記金属殻を構成する物質が異なる性質をもつ、複数のナノ粒子の組合せを含む特定の吸収パターンを規定するステップをさらに含むことを特徴とする請求項1に記載の方法。
- 前記ナノ粒子の前記誘電体多孔核は多孔性であり、孔内への、対象物の認証に用いられる別の物質の収容に適合されることを特徴とする請求項1に記載の方法。
- 偽造に対する追加のセキュリティ要素として働く磁気ナノ粒子を添加するステップをさらに含むことを特徴とする請求項1に記載の方法。
- 前記ナノ粒子は、直鎖または多次元マトリクスを形成することを特徴とする請求項1に記載の方法。
- 前記ナノ粒子は、微小の球体、微小の線状、微小の棒状、4面体および立方体のいずれかから選択された形状を有することを特徴とする請求項1に記載の方法。
- 前記対象物が紙幣である、請求項1に記載の方法。
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ESP200930865 | 2009-10-19 | ||
ES200930865A ES2359411B1 (es) | 2009-10-19 | 2009-10-19 | Método de autenticación de objetos. |
PCT/ES2010/000415 WO2011061359A2 (es) | 2009-10-19 | 2010-10-14 | Sistema y procedimiento de autenticación de objetos |
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EP (1) | EP2492879A4 (ja) |
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CN (1) | CN102834850B (ja) |
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EP3085306B1 (en) * | 2015-04-22 | 2017-11-01 | Roche Diabetes Care GmbH | Medical product and method for authenticating the same |
WO2017068440A1 (en) * | 2015-10-24 | 2017-04-27 | Malpani Manoj | High tear resistant paper comprising means for determinining authenticity |
US9931882B2 (en) | 2016-07-25 | 2018-04-03 | Raytheon Company | Counter counterfeit technology |
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US8497131B2 (en) * | 1999-10-06 | 2013-07-30 | Becton, Dickinson And Company | Surface enhanced spectroscopy-active composite nanoparticles comprising Raman-active reporter molecules |
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WO2002020695A1 (de) * | 2000-09-08 | 2002-03-14 | Nanosolutions Gmbh | Dotierte nanopartikel |
JP2002114928A (ja) * | 2000-10-06 | 2002-04-16 | Mitsubishi Chemicals Corp | 半導体超微粒子を含有する塗布組成物 |
US20060038979A1 (en) | 2004-08-05 | 2006-02-23 | Michael Natan | Nanoparticles as covert taggants in currency, bank notes, and related documents |
WO2005055154A1 (ja) * | 2003-12-01 | 2005-06-16 | Plagenom Co., Ltd. | 真贋判定方法および同装置 |
US20050276906A1 (en) * | 2004-06-10 | 2005-12-15 | Gary Metzger | Systems and methods for detecting and verifying taggant information of a tagged item or substance |
EP1646057A2 (en) * | 2004-10-09 | 2006-04-12 | European Central Bank | Security document and method for identification and/or authentication of a security document |
US8512946B2 (en) * | 2005-08-10 | 2013-08-20 | Northwestern University | Composite particles |
JP5196749B2 (ja) * | 2006-08-09 | 2013-05-15 | キヤノン株式会社 | 標的物質検出材料、及びその製造方法 |
WO2008140624A2 (en) * | 2006-12-22 | 2008-11-20 | The Board Of Regents Of The University Of Texas System | Methods and compositions related to hybird nanoparticles |
FR2910632B1 (fr) * | 2006-12-22 | 2010-08-27 | Commissariat Energie Atomique | Dispositif de codage optique par effet plasmon et methode d'authentification le mettant en oeuvre |
DE102007061979A1 (de) | 2007-12-21 | 2009-06-25 | Giesecke & Devrient Gmbh | Sicherheitselement |
WO2009117124A1 (en) * | 2008-03-19 | 2009-09-24 | Nanospectra Biosciences, Inc. | Narrowband imaging using near-infrared absorbing nanoparticles |
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2009
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WO2011061359A2 (es) | 2011-05-26 |
JP2013508842A (ja) | 2013-03-07 |
US20120217394A1 (en) | 2012-08-30 |
EP2492879A2 (en) | 2012-08-29 |
CN102834850A (zh) | 2012-12-19 |
CN102834850B (zh) | 2016-01-20 |
ES2359411B1 (es) | 2012-04-03 |
ES2359411A1 (es) | 2011-05-23 |
WO2011061359A3 (es) | 2011-07-14 |
US9079150B2 (en) | 2015-07-14 |
EP2492879A4 (en) | 2015-01-21 |
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