Surface modification on silver nanoparticles for enhancing vapor selectivity of localized surface plasmon resonance sensors

Yu Quan Chen, Chia Jung Lu

研究成果: 雜誌貢獻期刊論文同行評審

73 引文 斯高帕斯(Scopus)

摘要

This study focuses on localized surface plasmon resonance (LSPR) sensors employing silver nanoparticles that were surface functionalized with various thiolate self-assembled monolayers (SAM) to provide chemical selectivity for detection of volatile organic compounds (VOCs). Changes in the LSPR spectrum of silver nanoparticles were measured as the response signal. One unmodified and three surface-modified nanoparticle LSPR sensors generated distinguishable patterns for tested organic vapors with different functional groups. The sensor responses were rapid and reversible for all tested vapors. The detection limits of the LSPR sensor were as low as 18-30 ppm for heptanone, depending on the surface modification of Ag nanoparticles. SAM modification not only altered chemical affinity of the surface, but also moderately improved the detection limit without lengthening the response time. Surface modification using thiolates with refractive indices higher than condensed VOC neither reduced nor reversed the sensor response. Mechanisms for this phenomenon are also discussed.

原文英語
頁(從 - 到)492-498
頁數7
期刊Sensors and Actuators, B: Chemical
135
發行號2
DOIs
出版狀態已發佈 - 2009 一月 15

ASJC Scopus subject areas

  • 電子、光磁材料
  • 儀器
  • 凝聚態物理學
  • 表面、塗料和薄膜
  • 金屬和合金
  • 電氣與電子工程
  • 材料化學

指紋

深入研究「Surface modification on silver nanoparticles for enhancing vapor selectivity of localized surface plasmon resonance sensors」主題。共同形成了獨特的指紋。

引用此