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0.5Vで動作するミニチュア型,ガスを使用しない電解体ポンプ
Woonsup Shin1, Jong Myung Lee, Rajaram Krishna Nagarale
1Department of Chemical Engineering, University of Texas, Austin, Texas 78712, USA. shinws@sogang.ac.kr
Journal of the American Chemical Society
|February 9, 2011
まとめ
新しい電解スモティックポンプは,銀の電極を使用して,電解なしで効率的に水をポンプします. このブレークスルーにより,薬物の配送などのアプリケーションでは安定したフローレットを可能にし,従来のプラチナベースのポンプの限界を克服しました.
科学分野:
- 電気化学 電気化学について
- マテリアルサイエンス 材料科学
- 流体力学 流体力学とは
背景:
- 伝統的な電解気体ポンプは,しばしばプラチナの電極と高電圧を使用し,水の電解とガス泡の形成につながります.
- ガスバブルは電極や膜に付着し,ポンプの性能を阻害し,安定した流れを防ぐ可能性があります.
- 既存の設計は,電解副産物による一貫した動作を維持する上で課題に直面しています.
研究 の 目的:
- 従来のプラチナ電極の代替により,より効率的で安定した電気大気ポンプを開発する.
- 水の電解の値を下回る電解スモティックポンプの稼働の可行性を調査する.
- 銀/銀酸化物電極を用いたポンプの性能と効率を特徴付ける.
主な方法:
- プラチナの電極は,消費された銀/銀酸化物 (Ag/Ag(2) O) の電極で代替されました.
- ポンプは水電解の1.23Vの値を下回る電圧で動作した.
- 測定された流れ率,効率 (電子あたりの水分,ジュールあたりの水量),電力消費.
主要な成果:
- ポンプは1.23V以下で効率的に動作し,水素と酸素のガス生成を避けました.
- 反応した電子ごとに13,000個の水分子をポンプで汲み上げることで,高い効率を達成しました.
- 流量が0.13 mL min{-1) V{-1) cm{-2) と290 mL min{-1) W{-1) 単位電力あたりの流量であることを実証しました.
結論:
- 銀/銀酸化物電極は,水解電解の値を下回る安定的かつ効率的な電宇宙式ポンプを可能にします.
- プロトン駆動メカニズムは,流体輸送のための信頼できる方法を提供します.
- 開発されたポンプは,薬物投与システムにおける潜在的なアプリケーションのために十分なフローレットを提供します.
関連する概念動画
ATP Driven Pumps III: V-type Pumps
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
ATP Driven Pumps II: P-type Pumps
The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
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A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
ATP Driven Pumps I: An Overview
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and are...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and are...
Potentiometry: Membrane Electrodes
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...

