Formation of biofunctional thin films on gold electrodes by electrodeposition of poly(acrylamide-co-tyrosineamide)

Huang Gang; Betsy J. Endrizzi; Vladimir Hlady; Russell J. Stewart

doi:10.1021/ma702205p

Formation of biofunctional thin films on gold electrodes by electrodeposition of poly(acrylamide-co-tyrosineamide)

Huang Gang, Betsy J. Endrizzi, Vladimir Hlady, Russell J. Stewart

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A new method was developed for modifying gold electrode surfaces through electrochemically triggered adsorption of acrylamide copolymers containing a low percentage of tyrosineamide side chains. The amount of copolymer adsorbed, as monitored by surface plasmon resonance (SPR), was proportional to the percent of tyrosineamide side chains in the polymer over the range 0-3 mol %. The modified gold surfaces were hydrophilic and resisted nonspecific adsorption of green fluorescent protein (GFP). Incorporation of nickel-binding nitrilotriacetic acid (NTA) side chains into the tyrosineamide copolymers allowed specific immobilization of His₆-tagged GFP. The Ni(II)-dependent GFP binding was measured by SPR and verified by fluorescence microscopy. The method may find utility as a means to electrically address the immobilization of unique ligands in biosensors or other diagnostic devices based on arrayed ligands.

Original language	English (US)
Pages (from-to)	448-452
Number of pages	5
Journal	Macromolecules
Volume	41
Issue number	2
DOIs	https://doi.org/10.1021/ma702205p
State	Published - Jan 22 2008
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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abstract = "A new method was developed for modifying gold electrode surfaces through electrochemically triggered adsorption of acrylamide copolymers containing a low percentage of tyrosineamide side chains. The amount of copolymer adsorbed, as monitored by surface plasmon resonance (SPR), was proportional to the percent of tyrosineamide side chains in the polymer over the range 0-3 mol %. The modified gold surfaces were hydrophilic and resisted nonspecific adsorption of green fluorescent protein (GFP). Incorporation of nickel-binding nitrilotriacetic acid (NTA) side chains into the tyrosineamide copolymers allowed specific immobilization of His6-tagged GFP. The Ni(II)-dependent GFP binding was measured by SPR and verified by fluorescence microscopy. The method may find utility as a means to electrically address the immobilization of unique ligands in biosensors or other diagnostic devices based on arrayed ligands.",

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T1 - Formation of biofunctional thin films on gold electrodes by electrodeposition of poly(acrylamide-co-tyrosineamide)

AU - Gang, Huang

AU - Endrizzi, Betsy J.

AU - Hlady, Vladimir

AU - Stewart, Russell J.

PY - 2008/1/22

Y1 - 2008/1/22

N2 - A new method was developed for modifying gold electrode surfaces through electrochemically triggered adsorption of acrylamide copolymers containing a low percentage of tyrosineamide side chains. The amount of copolymer adsorbed, as monitored by surface plasmon resonance (SPR), was proportional to the percent of tyrosineamide side chains in the polymer over the range 0-3 mol %. The modified gold surfaces were hydrophilic and resisted nonspecific adsorption of green fluorescent protein (GFP). Incorporation of nickel-binding nitrilotriacetic acid (NTA) side chains into the tyrosineamide copolymers allowed specific immobilization of His6-tagged GFP. The Ni(II)-dependent GFP binding was measured by SPR and verified by fluorescence microscopy. The method may find utility as a means to electrically address the immobilization of unique ligands in biosensors or other diagnostic devices based on arrayed ligands.

AB - A new method was developed for modifying gold electrode surfaces through electrochemically triggered adsorption of acrylamide copolymers containing a low percentage of tyrosineamide side chains. The amount of copolymer adsorbed, as monitored by surface plasmon resonance (SPR), was proportional to the percent of tyrosineamide side chains in the polymer over the range 0-3 mol %. The modified gold surfaces were hydrophilic and resisted nonspecific adsorption of green fluorescent protein (GFP). Incorporation of nickel-binding nitrilotriacetic acid (NTA) side chains into the tyrosineamide copolymers allowed specific immobilization of His6-tagged GFP. The Ni(II)-dependent GFP binding was measured by SPR and verified by fluorescence microscopy. The method may find utility as a means to electrically address the immobilization of unique ligands in biosensors or other diagnostic devices based on arrayed ligands.

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Formation of biofunctional thin films on gold electrodes by electrodeposition of poly(acrylamide-co-tyrosineamide)

Abstract

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