JP6760614B2 - 微細粒子の分散固定方法 - Google Patents
微細粒子の分散固定方法 Download PDFInfo
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- JP6760614B2 JP6760614B2 JP2018529427A JP2018529427A JP6760614B2 JP 6760614 B2 JP6760614 B2 JP 6760614B2 JP 2018529427 A JP2018529427 A JP 2018529427A JP 2018529427 A JP2018529427 A JP 2018529427A JP 6760614 B2 JP6760614 B2 JP 6760614B2
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- 239000010419 fine particle Substances 0.000 title claims description 53
- 239000006185 dispersion Substances 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 28
- 239000000758 substrate Substances 0.000 claims description 46
- 239000000725 suspension Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 17
- 150000005846 sugar alcohols Polymers 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 238000007710 freezing Methods 0.000 claims description 12
- 230000008014 freezing Effects 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 235000011187 glycerol Nutrition 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012620 biological material Substances 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 20
- 229910052710 silicon Inorganic materials 0.000 description 20
- 239000010703 silicon Substances 0.000 description 20
- 239000010408 film Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 9
- 238000004108 freeze drying Methods 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 238000001000 micrograph Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000000859 sublimation Methods 0.000 description 3
- 230000008022 sublimation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000007874 V-70 Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Description
微細粒子懸濁(スラリー)液は、溶媒としての水に微細粒子とともに必要に応じて分散剤を与えるとともに、ここでは蒸気圧を低下させ得る、例えば多価アルコールを添加して、超音波攪拌機などで混合して調製される。
図2に示すように、滴下凍結装置1は、マイクロピペット5から所定量の微細粒子懸濁液を冷却された基板6の上に適下し、薄く拡がった膜を形成させ、これを瞬時に凍結させて凍結膜7とさせる装置である。
基板6上に薄く拡がった微細粒子懸濁液は、瞬間的に凍結し凍結膜7となるが、冷却温度との平衡に達するまで低温槽10内で十分に静置する。なお、基板6上の微細粒子懸濁液の拡がりによる厚さを0.1mmにすると、10msec程度で凍結していると見積もられる。一方、これが1mmであると1sec近くを要することになって微細粒子の凝集を生じさせてしまう。
図3に示すように、凍結膜7を基板6とともに試料容器14ごと真空槽20内に移送し、真空ポンプ22、例えば、ターボ分子ポンプと油回転ポンプとを組み合わせた真空系で内部を減圧する。典型的には、10-2Pa程度の高真空状態とする。これにより、低い蒸気圧の多価アルコールの如きであっても蒸発し、完全に蒸発させるためには十分な時間保持する。
平均直径100nm、粒子濃度1×10-10個/cm3のシリカ球懸濁液(独Micromod社、商品名sicastar(登録商標))を用意した(懸濁液A)。4mlの懸濁液Aに50μlのグリセリンを混合し、さらに超音波攪拌を行って懸濁液Bを調製した(液調製工程:S1)。
5 マイクロピペット
6 基板
7 凍結膜
10 低温槽
12 アルミブロック
14 試料容器
Claims (6)
- 水に非生物材料からなる微細粒子を分散させた懸濁液を基板上に滴下し乾燥させ該微細粒子の評価及び観察を与えるために分散固定する方法であって、
前記懸濁液に多価アルコールを添加し蒸気圧を低下させた上で冷却基板上に滴下して薄膜を形成させつつ凍結させる凍結工程と、前記多価アルコールを蒸発させ得る高真空に真空引きして乾燥させる乾燥工程と、を含むことを特徴とする微細粒子の分散固定方法。 - 前記多価アルコールはグリセリン、エチレングリコール、ジエチレングリコール、プロピレングリコールのいずれか1つ又はこれらの混合物であることを特徴とする請求項1記載の分散固定方法。
- 前記乾燥工程は、前記水由来の氷を昇華させつつ前記多価アルコールの濃度を高めてからこれを蒸発させる工程を含むことを特徴とする請求項2記載の分散固定方法。
- 前記多価アルコールの蒸発由来のアイランド部を形成することを特徴とする請求項3記載の分散固定方法。
- 前記乾燥工程は、10−2Pa以下に真空引きすることを特徴とする請求項4記載の分散固定方法。
- 前記微細粒子は、ナノメーターオーダーの平均粒径であることを特徴とする請求項5記載の分散固定方法。
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JP2016149513 | 2016-07-29 | ||
JP2016149513 | 2016-07-29 | ||
PCT/JP2017/021818 WO2018020877A1 (ja) | 2016-07-29 | 2017-06-13 | 微細粒子の分散固定方法 |
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JPWO2018020877A1 JPWO2018020877A1 (ja) | 2019-02-21 |
JP6760614B2 true JP6760614B2 (ja) | 2020-09-23 |
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JP7246076B2 (ja) * | 2019-03-23 | 2023-03-27 | 国立大学法人浜松医科大学 | 微量液滴に含まれる微粒子の光学・電子顕微鏡による定量方法 |
JP2021135141A (ja) * | 2020-02-26 | 2021-09-13 | 国立研究開発法人産業技術総合研究所 | 粒子評価用標本の作製装置及び作製方法 |
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AU650045B2 (en) * | 1990-09-12 | 1994-06-09 | Lifecell Corporation | Method and apparatus for cryopreparation dry stabilization and rehydration of biological suspensions |
JP2002180365A (ja) * | 2000-12-12 | 2002-06-26 | Tsukishima Kikai Co Ltd | シート状高分子吸水体の製造装置および製造方法 |
JP2006210682A (ja) * | 2005-01-28 | 2006-08-10 | Seiko Epson Corp | 基板乾燥装置、基板処理システム、電気光学装置の製造方法、電気光学装置、および電子機器 |
JP5148821B2 (ja) * | 2005-09-20 | 2013-02-20 | 三井金属鉱業株式会社 | フレーク銀粉の製造方法及び、その製造方法で製造されたフレーク銀粉 |
JP2010008141A (ja) * | 2008-06-25 | 2010-01-14 | Canon Inc | 固体試料の作製装置、固体試料の作製方法及び試料の観察方法 |
JP2010266086A (ja) * | 2009-05-12 | 2010-11-25 | Soka Univ | 凍結乾燥装置および試料の凍結乾燥方法、ならびに凍結乾燥装置を有する電子顕微鏡用試料作製装置および電子顕微鏡用試料の作製方法 |
WO2014057564A1 (ja) * | 2012-10-11 | 2014-04-17 | 岩谷産業株式会社 | 凍結乾燥法を用いたナノ粒子乾燥体の製造方法 |
JP6338869B2 (ja) * | 2014-01-28 | 2018-06-06 | 国立研究開発法人産業技術総合研究所 | 粒径分布計測方法 |
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