Method and apparatus for target detection using electrode-bound viruses
First Claim
1. A biosensor comprising:
- an electrically conductive gold electrode operatively coupled to an impedance analyzer for measuring the change in the resistive impedance Δ
ZRe of the electrode;
a self-assembled monolayer chemically bonded to a surface of the electrically conductive gold electrode via a thiol-gold bond formed between N-hydroxysuccinimide thioctic ester and the gold electrode; and
a plurality of phage virus particles covalently bound to the self-assembled monolayer.
0 Assignments
0 Petitions
Accused Products
Abstract
A biosensor that is capable of detecting the presence and/or concentration of an analyte or biomarker includes at least one electrically conductive electrode operatively coupled to an impedance analyzer for measuring the change in the resistive impedance ΔZRe of the electrode in response to an applied alternating current at a plurality of frequencies. In one embodiment, at least one electrode is covered with a self-assembled monolayer that is chemically bonded to a surface. A plurality of virus particles such as phage viruses are immobilized on the self-assembled monolayer and may be exposed to a test or sample solution. The virus particles may be obtained from phage-displayed libraries to detect a wide variety of targets including, for example, DNA, RNA, small molecules, and proteins or polypeptides. In another embodiment, the virus particles are electrostatically bound to a substrate in between a pair of elongated electrodes disposed on a substrate.
11 Citations
13 Claims
-
1. A biosensor comprising:
-
an electrically conductive gold electrode operatively coupled to an impedance analyzer for measuring the change in the resistive impedance Δ
ZRe of the electrode;a self-assembled monolayer chemically bonded to a surface of the electrically conductive gold electrode via a thiol-gold bond formed between N-hydroxysuccinimide thioctic ester and the gold electrode; and a plurality of phage virus particles covalently bound to the self-assembled monolayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A system for detecting the presence of an analyte in a sample comprising:
-
an electrically conductive gold electrode operatively coupled to an impedance analyzer for measuring the change in the resistive impedance Δ
ZRe of the gold electrode in response to an applied alternating current;a self-assembled monolayer chemically bonded to a surface of the electrically conductive gold electrode via a thiol-gold bond formed between N-hydroxysuccinimide thioctic ester and the gold electrode; a plurality of phage virus particles covalently bound to the self-assembled monolayer; and at least one processor operatively coupled to the impedance analyzer for comparing the change in the measured resistive impedance Δ
ZRe with one or more pre-set values, the at least one processor configured for outputting a signal indicative of analyte detection based at least in part on the comparison. - View Dependent Claims (10, 11, 12, 13)
-
Specification