JP4509167B2 - 流路構造、これを備えた流路基板及び流体制御方法 - Google Patents
流路構造、これを備えた流路基板及び流体制御方法 Download PDFInfo
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Description
試料を排出する排出部と、を少なくとも備えた流路構造であり、試料の導入方向をX方向、第1の導入部と第2の導入部とを含む平面上においてX方向に直交する方向をY方向、前記平面に対する垂直方向をZ方向とすると、ZX平面上で略90度に流路が曲折する曲折部と、YZ平面上で略90度に流路が曲折する曲折部と、を、第1導入部と第2導入部との合流部の下流に備える流路構造を提供する。
この流路構造は、側方から流路に合流し、流路内における試料の層流幅を絞り込むための流体を導入する第2の導入部を、さらに2つの曲折部の下流にも備えることができる。
このような立体的形状の流路構造とすることで、流路の略中央部分に試料層流を集束させて、流路内を送液させることができる。
次に、試料の導入方向に対して流路を断面視した形状は、略同じ形状で維持されている流路構造を提供する。断面視した形状が略同じ形状であることで、試料が流路内で詰まる現象を効果的に防止できる。
また、本発明は、この流路構造を備えた流路基板を提供する。
さらに、本発明は、第1の導入部から導入される試料を、第1の導入部に側方から合流する第2の導入部から導入される流体で挟み込んで、流路内における試料の層流幅を絞り込んで送液する際に、(1)試料の導入方向をX方向、第1の導入部と第2の導入部とを含む平面上においてX方向に直交する方向をY方向、前記平面に対する垂直方向をZ方向とすると、第1の導入部と第2の導入部との合流部の下流において試料をZX平面上で略90度曲折させる工程と、
(2)第1の導入部と第2の導入部との合流部の下流において試料をYZ平面上で略90度曲折させる工程と、を少なくとも行う流体制御方法を提供する。
そして、本発明は、試料又は流体の流体条件を制御することで、流路内における試料層流の位置制御を行なう流体制御方法を提供する。前記流量を制御することで、流路内を流れる試料層流の位置を制御できる。その結果、より高精度の流体制御が可能となる。
図9に示す流路構造のモデルについてコンピュータ解析を行なった。図9は同流路構造のモデルの概略図である。図9の(1)は、流路構造を上面視した状態を示す。図9の(2)は流路構造を右側方から側面視した状態を示す。この図9の流路構造は、3箇所の曲折部を有している(例えば、図1等参照)。なお、図9に示す大きさや形状はシミュレーションの一例として採用したものであり、本発明の流路構造のサイズ等について限定するものではない(以下同様)。
図12に示す流路構造のモデルについてコンピュータ解析を行なった。図12は同流路構造のモデルの概略図である。図12の(1)は、流路構造を上面視した状態を示す。図12の(2)は流路構造を右側方から側面視した状態を示す。図12の流路構造は、3箇所の曲折部を有している。なお、図12に示す大きさや形状はシミュレーションの一例として採用したものであり、本発明の流路構造のサイズ等について限定するものではない。
図14に示す流路構造のモデルについてもコンピュータ解析を行なった。図14の流路構造は、流路の接続部分が、Y方向とX軸方向にそれぞれ0.1mmの余長(つきだし長)を有して接合している(図14の矢印参照)。これ以外は、図12と同様の構造である。
その結果、実施例3でも、3箇所の曲折部を経由したサンプル流は、3次元的にみても均一な流速分布を示し、かつ流路内の中心部分に集束して流れていることが示された。従って、一定の貼り合わせ誤差が生じた場合であっても、良好なサンプル流形状を確保できることが示唆された。
更に、流路構造の曲折部の構造について検討すべく、曲折部の連結構造について比較実験を行った。図15に示す種々の連結構造(1)〜(4)において、今までと同様の条件で流体シミュレーションを行い、これらの連結構造が及ぼす流体への影響を検討した。
連結構造2は、実施例3でシミュレーションした流路構造の曲折部分である。
連結構造3は、流路の接続部分が、Y方向とX軸方向にそれぞれ0.1mmの余長(つきだし長)を有して接合している。即ち、流路が屈曲していく方向と逆方向に所定の余長を設けている。これ以外は、実施例3のモデルと同様の構造である。
連結構造4は、流路の接続部分について、流路を屈曲させる間にH=0.6mmの中継路を設けている。これ以外は、実施例3のモデルと同様の構造である。
これらのシミュレーション結果を図15に示し、その比較結果を表1に示す。
11,21,31 第1導入部
12,22,32 排出部
13,17,23,24,28,29,33,36 第2導入部
14,15,16,25,26,27,34,35 曲折部
Claims (5)
- 試料を導入する第1の導入部と、
側方から第1の導入部に合流し、流路内における試料の層流幅を絞り込むための流体を導入する第2の導入部と、
試料を排出する排出部と、を少なくとも備えた流路構造であり、
試料の導入方向をX方向、第1の導入部と第2の導入部とを含む平面上においてX方向に直交する方向をY方向、前記平面に対する垂直方向をZ方向とすると、
ZX平面上で略90度に流路が曲折する曲折部と、YZ平面上で略90度に流路が曲折する曲折部と、を、第1の導入部と第2の導入部との合流部の下流に備え、かつ、
側方から流路に合流し、流路内における試料の層流幅を絞り込むための流体を導入する第2の導入部を、さらに2つの曲折部の下流にも備える流路構造。 - 試料の導入方向に対して流路を断面視した形状は、略同じ形状で維持されている請求項1記載の流路構造。
- 請求項1又は2記載の流路構造を備えた流路基板。
- 第1の導入部から導入される試料を、第1の導入部に側方から合流する第2の導入部から導入される流体で挟み込んで、流路内における試料の層流幅を絞り込んで送液する際に、順不同で、下記(1)工程と(2)工程とを少なくとも行い、その後、さらに、流路に側方から合流する第2の導入部から、流路内における試料の層流幅を絞り込むための流体を導入する工程を含む流体制御方法。
(1)試料の導入方向をX方向、第1の導入部と第2の導入部とを含む平面上においてX方向に直交する方向をY方向、前記平面に対する垂直方向をZ方向とすると、第1の導入部と第2の導入部との合流部の下流において試料をZX平面上で略90度曲折させる工程、
(2)第1の導入部と第2の導入部との合流部の下流において試料をYZ平面上で略90度曲折させる工程。 - 試料又は流体の流体条件を制御することで、流路内における試料層流の位置制御を行なう請求項4記載の流体制御方法。
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