JP2016538563A - 表面増強ラマン分光用基板及びその製造方法 - Google Patents
表面増強ラマン分光用基板及びその製造方法 Download PDFInfo
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- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
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Abstract
Description
(第1ステップ:プラズマ乾式エッチングによる突起型構造体の形成)
13.56MHzの容量結合プラズマ(capacitively coupled plasma;CCP)タイプのプラズマ電源装置(plasma power supply)を用いてPANAC社から購入した188μm厚さのポリエチレンテレフタレート(polyethylene terephthalate;PET)材質の高分子基板上に乾式エッチングを行った。エッチングのシステムは、直径0.23インチの環状のステンレススチールチューブで形成された直径6インチのシャワーヘッド部分と、そこから15cm間隔離れて上部に位置した直径6インチの電極とで構成された。具体的に、Panac社から購買した125μm厚さの高分子基板を電極に付着した後、反応チャンバーの圧力が6.7Paの真空状態に到逹すると、50sccmの流速で99.999%のアルゴン気体をシャワーヘッドを介して反応器に注入し、反応チャンバーの圧力を22.7Paに上昇させた。プラズマ乾式エッチングは、200W(すなわち、1.1W/cm2)水準のRF電力でエッチング時間を変化しながら行った。電極上のセルフバイアス(self−bias)によりエッチング工程中に高分子基板に印加されたプラズマイオンエネルギーは、102eVに類推された。一方、エッチング工程中、高分子基板の温度は常温に近い50℃以下に維持した。上記工程により高分子基板上に形成されるnm規模の突起型構造体の間隔は、上記エッチング工程の時間が増加するにつれて線形に増加し、上記条件下で1分以下にエッチング工程を行った場合、突起型構造体間の間隔は、40乃至80nm以下に維持された(図3)。上記高分子突起型構造体の間隔及び大きさは、AFMの断面プロファイル法を用いて測定した。
(第2ステップ:金属含有ラマン活性物質の蒸着)
[実施例2]製造された表面増強ラマン分光用基板の光学的特性
[実施例3]製造された表面増強ラマン分光用基板からのラマン信号の検出
[実施例4]製造された表面増強ラマン分光基板の安定性テスト
Claims (24)
- (i)第1表面上に上部突出曲面を有する、互いに離隔した突起型構造体が形成された高分子基板と、
(ii)前記突起型構造体上に形成された金属含有ナノ粒子と、
(iii)高分子基板の第1表面上の突起型構造体が存在しない部分の一部または全部に形成された金属含有薄膜層と、を含み、
前記金属含有ナノ粒子と前記金属含有薄膜層とは、前記第1表面上に金属含有ラマン活性物質を同時に真空蒸着させて形成され、
前記金属含有ラマン活性物質は、初期には前記第1表面及び前記突起型構造体に均一に蒸着されるが、蒸着が進行されるにつれて前記突起型構造体の上部に集中的に蒸着されることになる表面増強ラマン分光用基板。 - 前記離隔して形成された突起型構造体は、一定の間隔で整列されたものである請求項1に記載の表面増強ラマン分光用基板。
- 前記離隔して形成された突起型構造体は、10乃至500nm間隔で整列されたものである請求項2に記載の表面増強ラマン分光用基板。
- 前記突起型構造体は、高分子基板の表面を乾式エッチングして形成されるものである請求項1に記載の表面増強ラマン分光用基板。
- 前記乾式エッチングは、アルゴン、酸素、水素、ヘリウム及び窒素気体で構成される群から選択されるいずれか1種以上の気体を用いて行われるプラズマ乾式エッチングである請求項4に記載の表面増強ラマン分光用基板。
- 前記真空蒸着は、スパッタリング(sputtering)、気化(evaporation)及び化学蒸気蒸着(chemical vapor deposition)により行われる請求項1に記載の表面増強ラマン分光用基板。
- 前記突起型構造体上の金属含有ナノ粒子は、球形または楕円形の形状に形成されるものである請求項1に記載の表面増強ラマン分光用基板。
- 前記金属含有ナノ粒子の平均粒径は、5nm乃至1μmである請求項1に記載の表面増強ラマン分光用基板。
- 前記金属含有ナノ粒子の平均粒径は、10nm乃至300nmである請求項7に記載の表面増強ラマン分光用基板。
- 高分子基板に対して垂直に存在する前記金属含有ナノ粒子の水平方向の最大幅W1は、これに対応する高分子基板に垂直である前記突起型構造体の水平方向の最大幅W2と同一または大きく、突起型構造体の中心間の最短間隔W3より小さい請求項1に記載の表面増強ラマン分光用基板。
- 前記突起型構造体間の間隔及び突起型構造体上に形成された金属含有ナノ粒子の大きさを調整して前記金属含有ナノ粒子の離隔間隔を調整した請求項1に記載の表面増強ラマン分光用基板。
- 前記金属含有ナノ粒子は、隣接した金属含有ナノ粒子、隣接した金属含有薄膜層または両方ともナノギャップを形成し、前記ナノギャップは、1乃至10nm範囲で形成される請求項1に記載の表面増強ラマン分光用基板。
- 前記金属含有ナノ粒子は、金属、金属酸化物または金属窒化物である請求項1に記載の表面増強ラマン分光用基板。
- 前記金属含有ナノ粒子中の金属は、Au、Ag、Cu、Pt及びPd、及びその合金で構成された群から選択されるものである請求項1に記載の表面増強ラマン分光用基板。
- 前記高分子基板は、アクリル系高分子(Acrylic polymers)、ポリエーテルスルホン(Polyethersulfone;PES)、ポリシクロオレフィン(Polycycloolefin;PCO)、ポリウレタン(polyurethane)及びポリカーボネート(polycarbonate;PC)で構成された群から選択される高分子で形成された高分子自体基板であるか、他の基板上に前記高分子を含む強化コーティング層の形態でコーティングされたものである請求項1に記載の表面増強ラマン分光用基板。
- 前記アクリル系高分子は、ポリメチルメタクリレート(Poly(methyl methacrylate);PMMA)、ポリメタクリレート(polymethacrylate)、ポリメチルアクリレート(poly(methyl acrylate);PMA)、ポリエチルアクリレート(poly(ethyl acrylate);PEA)、ポリ(2−クロロエチルビニルエーテル)(poly(2−chloroethyl vinyl ether);PCVE)、ポリ(2−エチルヘキシルアクリレート)(poly(2−Ethylhexyl acrylate);PEHA)、ポリヒドロキシエチルメタクリレート(poly(Hydroxyethyl methacrylate);PHEMA)、ポリブチルアクリレート(poly(butyl acrylate);PBA)、ポリブチルメタクリレート(poly(butyl methacrylate);PBMA)、ポリエチレンテレフタレート(polyethylene terephthalate;PET)、ポリエチレンナフタレート(polyethylene naphthalate;PEN)及びポリトリメチロ−ルプロパントリアクリレート(poly(trimethylolpropane triacrylate);PTMPTA)で構成された群から選択されるものである請求項15に記載の表面増強ラマン分光用基板。
- 前記強化コーティング層は、アクリル系、ポリウレタン系、エポキシ系及びプライマー系の塗料で構成された群から選択されるポリマー塗料を含むものである請求項15に記載の表面増強ラマン分光用基板。
- 前記強化コーティング層は、金属酸化物、金属硫化物、アルミナ、シリカ、酸化ジルコニウム及び酸化鉄で構成された群から選択される無機微粒子をさらに含むものである請求項15に記載の表面増強ラマン分光用基板。
- 前記強化コーティング層は、1乃至10μm厚さでコーティングされたものである請求項15に記載の表面増強ラマン分光用基板。
- 請求項1に記載の表面増強ラマン分光用基板の製造方法であって、
高分子基板の第1表面を乾式エッチング処理し、上部突出曲面を有する突起型構造体を互いに離隔して形成する第1ステップと、
隣接した金属含有ナノ粒子間にナノギャップが形成されるまで、金属含有ラマン活性物質を同時に真空蒸着させて、前記突起型構造体の各上部突出曲面上に金属含有ナノ粒子を、高分子基板の第1表面上の突起型構造体が存在しない部分には金属含有薄膜層を形成する第2ステップと、を含み、
前記金属含有ラマン活性物質は、初期には前記第1表面及び前記突起型構造体に均一に蒸着されるが、蒸着が進行するにつれ前記突起型構造体の上部に集中的に蒸着されることになる表面増強ラマン分光用基板の製造方法。 - 前記真空蒸着は、スパッタリング(sputtering)、気化(evaporation)及び化学蒸気蒸着(chemical vapor deposition)により行われる請求項20に記載の表面増強ラマン分光用基板の製造方法。
- 光源と、
請求項1から請求項19のいずれか1項に記載の表面増強ラマン分光用基板と、
ラマン分光を検出する検出器と、
を備えたラマン分光装置。 - 光源は、レーザであることを特徴とする請求項22に記載のラマン分光装置。
- 分析物に対してラマン分光法を実施する方法であって、
請求項1から請求項19のいずれか1項に記載の表面増強ラマン分光用基板を準備するステップと、
前記基板に分析物を近接または接触させるステップと、
光照射するステップと、
分析物から散乱されたラマン分光を検出するステップと、
を含む方法。
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EP3048438A4 (en) | 2017-06-07 |
JP6198957B2 (ja) | 2017-09-20 |
KR101448111B1 (ko) | 2014-10-13 |
CN105556290A (zh) | 2016-05-04 |
EP3048438B1 (en) | 2021-07-07 |
WO2015041442A1 (ko) | 2015-03-26 |
CN105556290B (zh) | 2019-05-07 |
US9557272B2 (en) | 2017-01-31 |
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