Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach

Lakshmi Supriya, Serkan Unal, Timothy Edward Long, Richard O. Claus

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Conductive Au films were successfully assembled on poly(urethane urea) (PUU) films using a solution-based approach. This method does not require prior surface functionalization before the Au attachment. Immersion of the PUU film in a colloidal Au solution immobilizes the Au particles on the surface, and the growth increases with time. This attachment occurs via strong interactions of Au with the amine and amide groups in the polymer. Three different PUUs with hard segment contents of 20%, 30%, and 35% were studied. Growth of the films was monitored using UV-vis spectroscopy and scanning electron microscopy. Immersion in the gold solution for long times, or for shorter times with subsequent seeding, forms very conductive films. The resistivity of the films was (7 ± 1) × 10 -5 Ω·cm. Using this approach, PUUs can be used as adhesives for the attachment of gold to different surfaces. Since the PUUs are highly elastic materials, the effect of strain on the resistance was also studied. It was seen that the resistance increased as a function of the strain. This change in resistance was reversible and was recovered when the material was relaxed. Higher strains of >50% cause the conductive film to become completely insulating. However, it becomes conducting again as the film is relaxed. Such a switching behavior in the resistance has potential applications in sensors and electromechanical switches.

Original languageEnglish
Pages (from-to)2506-2512
Number of pages7
JournalChemistry of Materials
Volume18
Issue number10
DOIs
Publication statusPublished - 2006 May 16
Externally publishedYes

Fingerprint

Elastomers
Conductive films
Urethane
Urea
Gold
Ultraviolet spectroscopy
Amides
Amines
Adhesives
Polymers
Switches
Scanning electron microscopy
Sensors

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach. / Supriya, Lakshmi; Unal, Serkan; Long, Timothy Edward; Claus, Richard O.

In: Chemistry of Materials, Vol. 18, No. 10, 16.05.2006, p. 2506-2512.

Research output: Contribution to journalArticle

Supriya, Lakshmi ; Unal, Serkan ; Long, Timothy Edward ; Claus, Richard O. / Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach. In: Chemistry of Materials. 2006 ; Vol. 18, No. 10. pp. 2506-2512.
@article{d6a8d5fe0120467baf2052279eca86ab,
title = "Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach",
abstract = "Conductive Au films were successfully assembled on poly(urethane urea) (PUU) films using a solution-based approach. This method does not require prior surface functionalization before the Au attachment. Immersion of the PUU film in a colloidal Au solution immobilizes the Au particles on the surface, and the growth increases with time. This attachment occurs via strong interactions of Au with the amine and amide groups in the polymer. Three different PUUs with hard segment contents of 20{\%}, 30{\%}, and 35{\%} were studied. Growth of the films was monitored using UV-vis spectroscopy and scanning electron microscopy. Immersion in the gold solution for long times, or for shorter times with subsequent seeding, forms very conductive films. The resistivity of the films was (7 ± 1) × 10 -5 Ω·cm. Using this approach, PUUs can be used as adhesives for the attachment of gold to different surfaces. Since the PUUs are highly elastic materials, the effect of strain on the resistance was also studied. It was seen that the resistance increased as a function of the strain. This change in resistance was reversible and was recovered when the material was relaxed. Higher strains of >50{\%} cause the conductive film to become completely insulating. However, it becomes conducting again as the film is relaxed. Such a switching behavior in the resistance has potential applications in sensors and electromechanical switches.",
author = "Lakshmi Supriya and Serkan Unal and Long, {Timothy Edward} and Claus, {Richard O.}",
year = "2006",
month = "5",
day = "16",
doi = "10.1021/cm052423b",
language = "English",
volume = "18",
pages = "2506--2512",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "10",

}

TY - JOUR

T1 - Assembly of conductive Au films on poly(urethane urea) elastomers using a solution-based approach

AU - Supriya, Lakshmi

AU - Unal, Serkan

AU - Long, Timothy Edward

AU - Claus, Richard O.

PY - 2006/5/16

Y1 - 2006/5/16

N2 - Conductive Au films were successfully assembled on poly(urethane urea) (PUU) films using a solution-based approach. This method does not require prior surface functionalization before the Au attachment. Immersion of the PUU film in a colloidal Au solution immobilizes the Au particles on the surface, and the growth increases with time. This attachment occurs via strong interactions of Au with the amine and amide groups in the polymer. Three different PUUs with hard segment contents of 20%, 30%, and 35% were studied. Growth of the films was monitored using UV-vis spectroscopy and scanning electron microscopy. Immersion in the gold solution for long times, or for shorter times with subsequent seeding, forms very conductive films. The resistivity of the films was (7 ± 1) × 10 -5 Ω·cm. Using this approach, PUUs can be used as adhesives for the attachment of gold to different surfaces. Since the PUUs are highly elastic materials, the effect of strain on the resistance was also studied. It was seen that the resistance increased as a function of the strain. This change in resistance was reversible and was recovered when the material was relaxed. Higher strains of >50% cause the conductive film to become completely insulating. However, it becomes conducting again as the film is relaxed. Such a switching behavior in the resistance has potential applications in sensors and electromechanical switches.

AB - Conductive Au films were successfully assembled on poly(urethane urea) (PUU) films using a solution-based approach. This method does not require prior surface functionalization before the Au attachment. Immersion of the PUU film in a colloidal Au solution immobilizes the Au particles on the surface, and the growth increases with time. This attachment occurs via strong interactions of Au with the amine and amide groups in the polymer. Three different PUUs with hard segment contents of 20%, 30%, and 35% were studied. Growth of the films was monitored using UV-vis spectroscopy and scanning electron microscopy. Immersion in the gold solution for long times, or for shorter times with subsequent seeding, forms very conductive films. The resistivity of the films was (7 ± 1) × 10 -5 Ω·cm. Using this approach, PUUs can be used as adhesives for the attachment of gold to different surfaces. Since the PUUs are highly elastic materials, the effect of strain on the resistance was also studied. It was seen that the resistance increased as a function of the strain. This change in resistance was reversible and was recovered when the material was relaxed. Higher strains of >50% cause the conductive film to become completely insulating. However, it becomes conducting again as the film is relaxed. Such a switching behavior in the resistance has potential applications in sensors and electromechanical switches.

UR - http://www.scopus.com/inward/record.url?scp=33745603761&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745603761&partnerID=8YFLogxK

U2 - 10.1021/cm052423b

DO - 10.1021/cm052423b

M3 - Article

VL - 18

SP - 2506

EP - 2512

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 10

ER -