Silver-nanoparticle-conjugated polypeptide brushes for surface-enhanced raman scattering

Di Yan Wang; Tzu Shen Teng; Yi Chou Wu; Yi Cheng Lee; Kuei Hsien Chen; Chung Hsuan Chen; Ying Chih Chang; Chia Chun Chen

doi:10.1021/jp903664u

Silver-nanoparticle-conjugated polypeptide brushes for surface-enhanced raman scattering

Di Yan Wang, Tzu Shen Teng, Yi Chou Wu, Yi Cheng Lee, Kuei Hsien Chen, Chung Hsuan Chen, Ying Chih Chang, Chia Chun Chen^*

^*Corresponding author for this work

Department of Chemistry

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

18 Citations (Scopus)

Abstract

A soft surface-enhanced Raman scattering (SERS) substrate was fabricated based on a three-dimensional (3D) structure of biocompatible end-tethered poly(L-lysine) ("t-PLL") with a brushlike configuration conjugated with silver nanoparticles (Ag NPs) (Ag NP-t-PLL film). The conjugation procedures were carefully adjusted to generate the films with different interval widths (W) between Ag NPs and diameters (D) of Ag NPs. The resulting film was then characterized by zeta potential, CD spectropolarimeter, and scanning electron microscopy. Furthermore, the studies of SERS enhancements using Ag NP-t-PLL film as a substrate were performed. The significant increases of SERS enhancements have been obtained as W/D was decreased from 0.9 to 0.2. Our results not only afford a facile fabrication of a 3D soft substrate for SERS with high sensitivity and biocompatibility but also offer great potentials for the development of new biosensors.

Original language	English
Pages (from-to)	13498-13504
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	31
DOIs	https://doi.org/10.1021/jp903664u
Publication status	Published - 2009 Aug 6

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Silver-nanoparticle-conjugated polypeptide brushes for surface-enhanced raman scattering",

abstract = "A soft surface-enhanced Raman scattering (SERS) substrate was fabricated based on a three-dimensional (3D) structure of biocompatible end-tethered poly(L-lysine) ({"}t-PLL{"}) with a brushlike configuration conjugated with silver nanoparticles (Ag NPs) (Ag NP-t-PLL film). The conjugation procedures were carefully adjusted to generate the films with different interval widths (W) between Ag NPs and diameters (D) of Ag NPs. The resulting film was then characterized by zeta potential, CD spectropolarimeter, and scanning electron microscopy. Furthermore, the studies of SERS enhancements using Ag NP-t-PLL film as a substrate were performed. The significant increases of SERS enhancements have been obtained as W/D was decreased from 0.9 to 0.2. Our results not only afford a facile fabrication of a 3D soft substrate for SERS with high sensitivity and biocompatibility but also offer great potentials for the development of new biosensors.",

author = "Wang, {Di Yan} and Teng, {Tzu Shen} and Wu, {Yi Chou} and Lee, {Yi Cheng} and Chen, {Kuei Hsien} and Chen, {Chung Hsuan} and Chang, {Ying Chih} and Chen, {Chia Chun}",

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AU - Wang, Di Yan

AU - Teng, Tzu Shen

AU - Wu, Yi Chou

AU - Lee, Yi Cheng

AU - Chen, Kuei Hsien

AU - Chen, Chung Hsuan

AU - Chang, Ying Chih

AU - Chen, Chia Chun

PY - 2009/8/6

Y1 - 2009/8/6

N2 - A soft surface-enhanced Raman scattering (SERS) substrate was fabricated based on a three-dimensional (3D) structure of biocompatible end-tethered poly(L-lysine) ("t-PLL") with a brushlike configuration conjugated with silver nanoparticles (Ag NPs) (Ag NP-t-PLL film). The conjugation procedures were carefully adjusted to generate the films with different interval widths (W) between Ag NPs and diameters (D) of Ag NPs. The resulting film was then characterized by zeta potential, CD spectropolarimeter, and scanning electron microscopy. Furthermore, the studies of SERS enhancements using Ag NP-t-PLL film as a substrate were performed. The significant increases of SERS enhancements have been obtained as W/D was decreased from 0.9 to 0.2. Our results not only afford a facile fabrication of a 3D soft substrate for SERS with high sensitivity and biocompatibility but also offer great potentials for the development of new biosensors.

AB - A soft surface-enhanced Raman scattering (SERS) substrate was fabricated based on a three-dimensional (3D) structure of biocompatible end-tethered poly(L-lysine) ("t-PLL") with a brushlike configuration conjugated with silver nanoparticles (Ag NPs) (Ag NP-t-PLL film). The conjugation procedures were carefully adjusted to generate the films with different interval widths (W) between Ag NPs and diameters (D) of Ag NPs. The resulting film was then characterized by zeta potential, CD spectropolarimeter, and scanning electron microscopy. Furthermore, the studies of SERS enhancements using Ag NP-t-PLL film as a substrate were performed. The significant increases of SERS enhancements have been obtained as W/D was decreased from 0.9 to 0.2. Our results not only afford a facile fabrication of a 3D soft substrate for SERS with high sensitivity and biocompatibility but also offer great potentials for the development of new biosensors.

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IS - 31

ER -

Silver-nanoparticle-conjugated polypeptide brushes for surface-enhanced raman scattering

Abstract

ASJC Scopus subject areas

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