JP6410290B2 - 表面増強ラマン測定方法および表面増強ラマン測定装置 - Google Patents
表面増強ラマン測定方法および表面増強ラマン測定装置 Download PDFInfo
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Description
以下に、ナノシェル構造体1を誘電泳動を用いて電極近傍に凝集させることによる表面増強ラマン測定の効果についての評価実験の結果を示す。図7は本実施例における測定に利用した装置の概要を示す図である。図7(a)は側面図であり、図7(b)は平面図である。図7に示すように、本実施例においては、櫛歯電極構造を有する一対の電極7をスライドガラス13上に作製し、当該電極7の設置領域を含むスライドガラス13の所定領域上に、超純水にナノシェル構造体1および測定試料Sの混合物を含む溶液を滴下した。さらに、混合物を含む溶液が乾燥によって濃度変化しないようにカバー部材14で所定領域を覆った。なお、本実施例において、ナノシェル構造体1として、上記実施形態で示したポリスチレンに金のナノ粒子が被覆されたものを使用し、測定試料Sとして、1mMの4bpyを使用した。ナノシェル構造体1と測定試料Sとは、ナノシェル構造体:4bpy=4:1となるように混合した。混合物の滴下量は10μlとした。カバー部材14はPDMS(poly(dimethylsiloxane))で作製した。図7(b)に示すように、誘電泳動が生じる電極7上の領域A1と電極7がない領域A2とにそれぞれ光を照射して表面増強ラマンスペクトルを計測した。
2 非金属微粒子
3 ナノ粒子
4 官能基
5 表面増強ラマン測定装置
6 収納部
7 電極
8 光照射部
9 測定部
10 制御部
11 幹電極部
12 枝電極部
Claims (6)
- 非金属微粒子の周囲に複数の貴金属のナノ粒子を被覆したナノシェル構造体を生成し、
前記ナノシェル構造体と測定試料とを、一対の電極間に交流電圧を印加して誘電泳動させることにより、前記測定試料の電気的特性と前記一対の電極に印加される交流電圧の周波数とに関連して定められる前記一対の電極のうちの少なくとも一方の電極上または周囲における所定領域に、前記ナノシェル構造体および前記測定試料の混合物を凝集させ、
前記所定領域において凝集した前記混合物の表面増強ラマンスペクトルを測定する、表面増強ラマン測定方法。 - 前記ナノシェル構造体の前記非金属微粒子は、所望の検出物質に応じて定められた官能基が接続されている、請求項1に記載の表面増強ラマン測定方法。
- 前記一対の電極のそれぞれは、幹電極部と、前記幹電極部から延び、それぞれが互いに平行な複数の枝電極部と、を含む櫛歯電極構造を有し、前記一対の電極のうちの一方の電極における前記複数の枝電極部が、他方の電極における前記複数の枝電極部間に配置される、請求項1または2に記載の表面増強ラマン測定方法。
- 前記非金属微粒子は、ポリスチレンであり、前記貴金属は、金である、請求項1から3の何れかに記載の表面増強ラマン測定方法。
- 非金属微粒子の周囲に複数の貴金属のナノ粒子を被覆したナノシェル構造体を含む溶液を収納する収納部と、
前記収納部内に配置された一対の電極と、
測定試料の電気的特性と前記一対の電極に印加される交流電圧の周波数とに関連して定められる前記一対の電極のうちの少なくとも一方の電極上または周囲における所定領域に所定の光を照射する光照射部と、
前記所定領域で生じる表面増強ラマンスペクトルを測定する測定部と、
制御部と、を備え、
前記制御部は、前記収納部に前記ナノシェル構造体および前記測定試料を収納した状態で、前記一対の電極間に所定の周波数を有する交流電圧を印加して前記ナノシェル構造体と前記測定試料とを誘電泳動させることにより、前記一対の電極のうちの少なくとも一方の電極上または周囲における前記所定領域に、前記ナノシェル構造体および前記測定試料の混合物を凝集させるように構成された、表面増強ラマン測定装置。 - 前記制御部は、前記一対の電極に印加する交流電圧の周波数を変更することにより前記ナノシェル構造体および前記測定試料の混合物を凝集させる位置を制御可能に構成される、請求項5に記載の表面増強ラマン測定装置。
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