JP4614221B2 - 光・電気濡れに基づくマイクロフルイディクスの光学的駆動のための装置と方法 - Google Patents
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Description
本発明はDARPA(米国国防総省国防高等研究事業局)によって与えられた契約番号MDA972-00-0019の下の米国政府機関の援助を使って行われている。米国政府機関は本発明に対していくらかの権利を有する。
本発明の実施形態は、利益的には、表面の電気濡れ特性を光を用いて制御することによって、溶滴を操作し、それによって溶滴の表面張力に傾きを生じさせる。表面張力の傾きは毛管力によって溶滴を推進させる。輸送、結合、切断、作成などの種種の操作を遂行させることが可能である。利益的に、本発明の実施形態は相当大きく複雑な制御電極配列を作成する必要を回避する。複数の光導電セルあるいは光導電性材料の層は、電気的なバイアスを行う電極を電気的なバイアスがかかっていないフローティングな導電性のセルと光線に応じて選択的に結合する。導電性セルに印加された電気的なバイアスは溶滴の接触角を変えることができる局所的電界を生み、その結果、溶滴を推進させることができる。
Claims (28)
- 光に応じて溶滴を操作するのに適したマイクロフルイディック回路であって、
交流(AC)電圧源の第一の端子に結合されるのに適した少なくともひとつの導電層を有する第一の壁と、
交流電圧源の第二の端子に結合されるのに適した第二の壁であって、前記第一の壁と当該第二の壁との間に電界が発生し、当該第二の壁は光に応答し、それにより局所的な光スポットによって照射される第二の壁の一部が局所的な光スポットにより照射されない当該第二の壁の一部よりも高い電界強度を示す、第二の壁と、
前記第一の壁と前記第二の壁との間に規定された空洞であって、前記溶滴を保持するのに適した空洞と、
前記空洞に面した、前記第一の壁に結合された疎水性の裏地と、
を具備し、
前記第一の壁、前記導電層および前記疎水性の裏地が光を透過する、マイクロフルイディック回路。 - 前記第二の壁が光を透過する、
請求項1記載のマイクロフルイディック回路。 - 前記第一の壁の前記導電層はインジウム-スズ酸化物(ITO)ガラスを具備し、前記疎水性の裏地はポリテトラフルオロエチレン(PTFE)を具備する、
請求項1記載のマイクロフルイディック回路。 - 前記第二の壁が
絶縁材料で作られた基板と、
前記空洞に面した絶縁層と、
前記基板と前記絶縁層の間に配置された光導電層と、
前記基板と前記光導電層との間に配置された第一の電極であって、当該第一の電極は交流電圧源の第二の端子に結合するのに適している、第一の電極と、
前記光導電層と前記絶縁層との間に配置された複数の導電セルであって、当該導電セルは電気的に絶縁されており、それにより当該導電セルは電気的に浮いている、複数の導電セルと、
を具備する、請求項1記載のマイクロフルイディック回路。 - 前記絶縁層がシリコン酸化物(SiO2)の層と、空洞に面したポリテトラフルオロエチレン(PTFE)の層とを具備する、
請求項4記載のマイクロフルイディック回路。 - 前記光導電層がアモルファスシリコンを具備する、
請求項4記載のマイクロフルイディック回路。 - 前記第一の電極が水平軸に沿って伸びた導電性の条帯を具備し、複数の前記導電セルが、導電セルが前記導電性の条帯と共に第一の電極から垂直方向には配列されないように、配置されている、
請求項4記載のマイクロフルイディック回路。 - 前記複数の導電セルが水平方位において行と列に配置され、前記第一の電極が垂直方向における前記導電セルの行の間に配置された水平な導体を含む、
請求項4記載のマイクロフルイディック回路。 - 局所的な光スポットを提供するのに適したレーザアセンブリを更に具備する、
請求項1記載のマイクロフルイディック回路。 - 局所的な光スポットを提供するのに適した発光ダイオード(LED)アレイを更に具備する、
請求項1記載のマイクロフルイディック回路。 - 前記第二の壁は可視波長の光に応答する、
請求項1記載のマイクロフルイディック回路。 - 前記第二の壁が、
透明な絶縁材料で作られた基板と、
前記空洞に面した絶縁層と、
前記基板と前記絶縁層との間に配置された複数の導電線であって、当該導電線は前記交流電圧源の第二の端子に結合されている複数の導電線と、
前記基板と前記絶縁層との間に配置された複数の導電セルであって、当該導電セルは前記導電線に隣接した、複数の導電セルと、
複数の光導電セルであって、当該導電セルは導電線を少なくともひとつの当該導電セルに結合されるように構成されている複数の光導電セルと
を具備する、請求項1記載のマイクロフルイディック回路。 - 前記導電セルは、十分に透明であり、前記第二の壁の一方の第一の区域に影響を及ぼす光に、前記第一の壁の対応する第二の区域を通過させ、照射することを可能にする、
請求項12記載のマイクロフルイディック回路。 - 導電材料の層を更に具備し、前記導電セルと前記導電ラインとが前記導電材料の層中に形成されている、
請求項12記載のマイクロフルイディック回路。 - 前記溶滴は水溶液を具備する、
請求項1記載のマイクロフルイディック回路。 - 前記第二の壁は1秒以内に感光する、
請求項1記載のマイクロフルイディック回路。 - 光に応じて溶滴を操作するのに適したマイクロフルイディック回路であって、
第一の基準電圧源に結合するのに適した第一の光学エレクトロウェッティング構造物であって、当該第一の光学エレクトロウェッティング構造物は、第一の絶縁層と、光に応答する少なくともひとつの第一の領域とを有し、前記第一の領域は、光に応じて、前記第一の基準電圧源を前記第一の絶縁層の少なくとも一部に電気的に結合する、第一の光学エレクトロウェッティング構造物と、
前記第一の光学エレクトロウェッティング構造物から隔てられている第二の光学エレクトロウェッティング構造物であって、当該第二の光学エレクトロウェッティング構造物は第二の基準電圧源に結合するのに適しており、当該第二の光学エレクトロウェッティング構造物は、第二の絶縁層と、光に応答する第二の領域とを有し、前記第二の領域は、光に応じて、前記第二の基準電圧源を前記第二の絶縁層の少なくとも一部に電気的に結合させ、当該第二の光学エレクトロウェッティング構造物の一方の側に入射した光が当該第二の光学エレクトロウェッティング構造物を通過して、前記第一の光学エレクトロウェッティング構造物の対応する光応答領域を露光できるよう、当該第二の光学エレクトロウェッティング構造物が十分に透明である、第二の光学エレクトロウェッティング構造物と、
第一の光学エレクトロウェッティング構造物と第二の光学エレクトロウェッティング構造物との間に規定される空洞であって、溶滴を保持するのに適している空洞と、
を具備するマイクロフルイディック回路。 - 前記第二の光学エレクトロウェッティング構造物は、
透明な絶縁材料で作られた基板と、
前記空洞に面した絶縁層と、
前記基板と前記絶縁層との間に配置された複数の導電線であって、当該導電線は交流電圧源の第二の端子に結合されている複数の導電線と、
前記基板と前記絶縁層との間に配置された複数の導電セルであって、当該導電セルは前記導電線に隣接した、複数の導電セルと、
複数の光導電セルであって、当該光導電セルは前記導電線を少なくともひとつの前記導電セルに結合するように構成されている複数の光導電セルと、
を具備する請求項17記載のマイクロフルイディック回路。 - 前記導電セルは十分に透明であり、それにより前記第二の壁の一方の側の第一の区域に影響を及ぼす光に、対応する第一の壁の第二の区域を通過させ、照射する、
請求項18記載のマイクロフルイディック回路。 - 導電材料の層を更に具備し、前記導電セルと前記導電線とが前記導電材料の層中に形成されている、
請求項18記載のマイクロフルイディック回路。 - 電気的にバイアス電圧に結合された第一のプレートと第二のプレートとを提供し、
溶滴を前記第一のプレートと前記第二のプレートとの間に保持し、
前記第一のプレートまたは前記第二のプレートの少なくともひとつの面の一部に選択的に光を照射し、それにより照射された部分が照射されていない区域よりも低い水との接触角を示し、前記溶滴の操作が可能になる、
マイクロスケール実験環境での溶滴の操作方法。 - 前記第一のプレートと前記第二のプレートの少なくともひとつが光導電層を含む、
請求項21記載の方法。 - 前記バイアス電圧が、交流(AC)電圧バイアスを前記第一のプレートと前記第二のプレートに提供し、その結果前記交流電圧バイアスが前記第一のプレートと前記第二のプレートとの間に電界を生じさせる、
請求項21記載の方法。 - 前記一部への光の照射が更に光導電層への照射を具備し、照射された部分は照射されていない部分より低い抵抗値を示し、従って前記光導電層に隣接した対応する区域に電界の傾きを生じさせる、
請求項22記載の方法。 - 前記溶滴は分極性液体である、
請求項22記載の方法。 - 電気的にバイアス電圧に結合された第一のプレートと第二のプレートとを提供し、
溶滴を前記第一のプレートと前記第二のプレートとの間に保持し、
前記第一のプレートと前記第二のプレートの少なくともひとつの面の一部に選択的に光を照射し、それにより照射された部分は表面での光誘起化学反応なしで照射されていない部分より低い接触角を示し、前記溶滴の操作が可能になる、
マイクロスケール実験環境での溶滴の操作方法。 - 前記照射が単一波長光線の使用を更に具備し、溶滴を操作する。
請求項26記載の方法。 - 前記溶滴の操作が、溶滴の輸送、複数の溶滴のひとつの溶滴への結合、ひとつの溶滴の少なくともふたつの溶滴への切断、リザーバからの溶滴の作成のうち、少なくともひとつを具備する、
請求項26記載の方法。
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WO2004012848A3 (en) | 2004-08-26 |
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US7727771B2 (en) | 2010-06-01 |
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AU2003272199A8 (en) | 2004-02-23 |
EP1509316A2 (en) | 2005-03-02 |
JP2005531409A (ja) | 2005-10-20 |
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