Cation recognition by self-assembled monolayers of oriented helical peptides having a crown ether unit

Miura, Yoshiko; Kimura, Shunsaku; Kobayashi, Shiro; Imanishi, Yukio; Umemura, Junzo

doi:10.1002/1097-0282(2000)55:5<391::aid-bip1013>3.0.co;2-k

Cited by 19 publications

(15 citation statements)

References 24 publications

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“…4.8), and is treated theoretically in [123,124]. Miura et al noted a 40% increase in capacitance upon capture of K + at a SAM-electrolyte interface [125]. Note that the probe and target molecules usually have pH-dependent charge states (usually referred to in terms of the pI, or pH at which the net charge is zero), as can the probe attachment surface.…”

Section: What Causes An Impedance Change?mentioning

confidence: 99%

“…The former was exploited for a sensor using a protein whose conformation changed upon binding of heavy metal ions [22] (though other possible explanations exist, cf. [125]). It has been shown that dsDNA conformation changes can be induced by varying ionic and/or pH conditions; this can result in significant changes in measured R leak and R ct [114,131].…”

Section: What Causes An Impedance Change?mentioning

confidence: 99%

See 1 more Smart Citation

Label‐Free Impedance Biosensors: Opportunities and Challenges

2007

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Impedance biosensors are a class of electrical biosensors that show promise for point-of-care and other applications due to low cost, ease of miniaturization, and label-free operation. Unlabeled DNA and protein targets can be detected by monitoring changes in surface impedance when a target molecule binds to an immobilized probe. The affinity capture step leads to challenges shared by all label-free affinity biosensors; these challenges are discussed along with others unique to impedance readout. Various possible mechanisms for impedance change upon target binding are discussed. We critically summarize accomplishments of past label-free impedance biosensors and identify areas for future research.

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Section: What Causes An Impedance Change?mentioning

confidence: 99%

Section: What Causes An Impedance Change?mentioning

confidence: 99%

Label‐Free Impedance Biosensors: Opportunities and Challenges

2007

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“…According to the literature [21,22], adsorption constants of metal cations to the B15C5 layer can be evaluated from the capacitance change. The total capacitance (C total ) consists of fractions of the cation-bounded B15C5 groups and free B15C5 groups.…”

Section: Determination Of Association Constants By Impedance Spectrosmentioning

confidence: 99%

Electrochemical modification of benzo-15-crown-5 ether on a glassy carbon electrode for alkali metal cation recognition

Morita

Yamaguchi

Teramae

2004

Journal of Electroanalytical Chemistry

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“…Kimura et al [120] have reported SAMs having a helical peptide with crown ether units and successful electrochemical detection of alkali metals such as potassium ions, the detection limit is about 10'5M. Two types of helical peptide self-assembled monolayers are prepared by connecting either N-terminal or C-terminal to a gold surface.…”

Section: Electroinactive Metalsmentioning

confidence: 99%