JP6302547B2 - ナノポアセルアレイにおける非ファラデー性容量結合測定 - Google Patents
ナノポアセルアレイにおける非ファラデー性容量結合測定 Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
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- G01N27/44756—Apparatus specially adapted therefor
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- G01N27/44717—Arrangements for investigating the separated zones, e.g. localising zones
- G01N27/4473—Arrangements for investigating the separated zones, e.g. localising zones by electric means
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3275—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction
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Description
Ag(固体) + Cl− (水性) → AgCl(固体) + 電子(アナログ回路中を流れる) 式1
[0038] 上記の式1において示されているように、金属銀の原子は、PNTMCを通過するそれぞれの塩化物陰イオン(Cl−)に関して、不溶性の塩である塩化銀(AgCl)に変換される。一部の場合において、銀は、数分の操作の内に消耗する。
104 PNTMC
106 酸化物
108 電解質の薄膜
110 金属電極
112 アナログ測定回路
114 バルク電解質
116 対/参照電極
200 セル
202 鋳型
204 ポリメラーゼ
206 ナノポア
208 4種類の異なるようにタグ付けされたヌクレオチド
210 イオン電流遮断信号
301 ナノポア
302 膜
303 酵素
304 一本鎖核酸分子
305 核酸プライマー
306 ヌクレオチド
307 タグ種
400 プロセス
602 脂質二重層
604 PNTMC
606 酸化物
608 電解質の薄膜
610 金属電極
612 アナログ測定回路
614 バルク電解質
616 対/参照電極
702 抵抗器
704 コンデンサー
1010 プロット
1020 プロット
1302 面積
1304 面積
1502 プロセス
1504 プロセス
1506 プロセス
Claims (31)
- 核酸分子の一部を同定する方法であって、下記を含む前記方法:
第1の期間の間に、一対の電極に第1の電圧信号を印加することにより、脂質二重層に挿入されたナノポアに核酸分子を引き入れることであって、ここで第1の電圧信号が、ナノポアを介して第1のイオン電流を生じさせ、それはナノポアに近接する核酸分子の一部の特性を示す;
第2の期間の間に、一対の電極に第2の電圧信号を印加することにより、ナノポアから核酸分子を放出することであって、ここで第2の電圧信号が、ナノポアを介して第2のイオン電流を生じさせる;および
第1のイオン電流および第2のイオン電流を含むナノポアを介した正味のイオン電流に少なくとも部分的に基づいて、第1の期間および第2の期間を決定すること。 - 正味のイオン電流に少なくとも部分的に基づく第1の期間および第2の期間の決定が、正味のイオン電流を低減する第1の期間および第2の期間の決定を含む、請求項1に記載の方法。
- 正味のイオン電流を低減する第1の期間および第2の期間の決定が、第2の電圧信号をオフに設定することを含む、請求項2に記載の方法。
- 正味のイオン電流を低減する第1の期間および第2の期間の決定が、第2の電圧信号を第1の電圧信号と反対の極性を有する信号に設定することを含む、請求項2に記載の方法。
- 第1の期間の間の第1の電圧信号および第2の期間の間の第2の電圧信号が、AC信号を含む、請求項4に記載の方法。
- さらに、AC信号のデューティーサイクルをナノポアに対応する整流特性に少なくとも部分的に基づいて設定することを含む、請求項5に記載の方法。
- さらに、AC信号のデューティーサイクルを、第1の期間および第2の期間を含む組み合わせられた期間にわたる第1のイオン電流に対応する電荷および第2のイオン電流に対応する電荷の和に少なくとも部分的に基づいて設定することを含む、請求項5に記載の方法。
- さらに、AC信号のデューティーサイクルを、核酸分子をナノポアに引き入れるために十分な電圧の大きさに少なくとも部分的に基づいて設定することを含む、請求項5に記載の方法。
- 電極の一方が非ファラデー性伝導を促進する特性を含む、請求項1〜8のいずれか1項に記載の方法。
- 電極の一方が貴金属を含む、請求項9に記載の方法。
- 電極の一方が電極の一方の表面積を増大させる構造を含む、請求項9又は10に記載の方法。
- 電極の一方が二重層の静電容量を増大させる構造を含む、請求項9〜11のいずれか1項に記載の方法。
- 電極の一方が海綿状構造を含む、請求項9〜12のいずれか1項に記載の方法。
- 海綿状構造が、白金を界面活性剤の存在下で白金電極上に電気メッキすることにより形成される、請求項13に記載の方法。
- 第1の期間および第2の期間が、核酸分子の一部の特性が時間の経過にわたってどれだけ速く変化するかに少なくとも部分的に基づいて決定される、請求項1〜14のいずれか1項に記載の方法。
- 核酸分子の一部を同定するためのシステムであって、下記を含む前記システム:
電圧源を制御する電圧制御ユニット;
電圧源に連結された一対の電極;および
測定回路;
ここで、電圧制御ユニットは、下記のように構成されており:
電圧源を制御して第1の期間の間に第1の電圧信号を一対の電極に印加することにより、脂質二重層に挿入されたナノポアに核酸分子を引き入れ、ここで、第1の電圧信号が、ナノポアを介して第1のイオン電流を生じさせ、それはナノポアに近接する核酸分子の一部の特性を示す;
電圧源を制御して第2の期間の間に一対の電極に第2の電圧信号を印加することにより、ナノポアから核酸分子を放出し、ここで第2の電圧信号が、ナノポアを介して第2のイオン電流を生じさせる;および
第1のイオン電流および第2のイオン電流を含むナノポアを介した正味のイオン電流に少なくとも部分的に基づいて、第1の期間および第2の期間を決定する;
かつここで、該測定回路は、第1のイオン電流を測定するように構成されている。 - 正味のイオン電流に少なくとも部分的に基づく第1の期間および第2の期間の決定が、正味のイオン電流を低減する第1の期間および第2の期間の決定を含む、請求項16に記載のシステム。
- 正味のイオン電流を低減する第1の期間および第2の期間の決定が、第2の電圧信号をオフに設定することを含む、請求項17に記載のシステム。
- 正味のイオン電流を低減する第1の期間および第2の期間の決定が、第2の電圧信号を第1の電圧信号と反対の極性を有する信号に設定することを含む、請求項17に記載のシステム。
- 第1の期間の間の第1の電圧信号および第2の期間の間の第2の電圧信号が、AC信号を含む、請求項19に記載のシステム。
- 電圧制御ユニットが、さらに、AC信号のデューティーサイクルをナノポアに対応する整流特性に少なくとも部分的に基づいて設定するように構成されている、請求項20に記載のシステム。
- 電圧制御ユニットが、さらに、AC信号のデューティーサイクルを、第1の期間および第2の期間を含む組み合わせられた期間にわたる第1のイオン電流に対応する電荷および第2のイオン電流に対応する電荷の和に少なくとも部分的に基づいて設定するように構成されている、請求項20に記載のシステム。
- 電圧制御ユニットが、さらに、AC信号のデューティーサイクルを、核酸分子をナノポアに引き入れるために十分な電圧の大きさに少なくとも部分的に基づいて設定するように構成されている、請求項20に記載のシステム。
- 電極の一方が非ファラデー性伝導を促進する特性を含む、請求項16〜23のいずれか1項に記載のシステム。
- 電極の一方が貴金属を含む、請求項24に記載のシステム。
- 電極の一方が電極の一方の表面積を増大させる構造を含む、請求項24又は25に記載のシステム。
- 電極の一方が二重層の静電容量を増大させる構造を含む、請求項24〜26のいずれか1項に記載のシステム。
- 電極の一方が海綿状構造を含む、請求項24〜27のいずれか1項に記載のシステム。
- 海綿状構造が、白金を界面活性剤の存在下で白金電極上に電気メッキすることにより形成される、請求項28に記載のシステム。
- 第1の期間および第2の期間が、核酸分子の一部の特性が時間の経過にわたってどれだけ速く変化するかに少なくとも部分的に基づいて決定される、請求項16〜29のいずれか1項に記載のシステム。
- 核酸分子が、ポリメラーゼと会合したタグ付けされたヌクレオチドを含み、ここで、第1の期間および第2の期間が、タグ付けされたヌクレオチドがポリメラーゼと会合している期間に少なくとも部分的に基づいて決定される、請求項16〜30のいずれか1項に記載のシステム。
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US14/056,795 | 2013-10-17 | ||
US14/056,795 US9551697B2 (en) | 2013-10-17 | 2013-10-17 | Non-faradaic, capacitively coupled measurement in a nanopore cell array |
PCT/US2014/055179 WO2015057324A2 (en) | 2013-10-17 | 2014-09-11 | Non-faradaic, capacitively coupled measurement in a nanopore cell array |
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