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Author:

Xing, Cheng (Xing, Cheng.) | Yan, Yinzhou (Yan, Yinzhou.) (Scholars:闫胤洲) | Feng, Chao (Feng, Chao.) | Xu, Jiayu (Xu, Jiayu.) | Dong, Peng (Dong, Peng.) | Guan, Wei (Guan, Wei.) | Zeng, Yong (Zeng, Yong.) | Zhao, Yan (Zhao, Yan.) (Scholars:赵艳) | Jiang, Yijian (Jiang, Yijian.) (Scholars:蒋毅坚)

Indexed by:

Scopus SCIE

Abstract:

Dielectric microspheres with extraordinary micro scale optical properties, such as photonic nanojets, optical whispering-gallery modes (WGMs), and directional antennas, have drawn interest in many research fields. Microsphere-enhanced Raman spectroscopy (MERS) is an alternative approach for enhanced Raman detection by dielectric microstructures. Unfortunately, fabrication of microsphere monolayer arrays is the major challenge of MERS for practical applications on various specimen surfaces. Here we report a microsphere-embedded film (MF) by immersing a highly refractive micro sphere monolayer array in the poly(dimethylsiloxane) (PDMS) film as a flexible MERS sensing platform for one-to three-dimensional (1D to 3D) specimen surfaces. The directional antennas and wave-guided whispering-gallery modes (WG-WGMs) contribute to the majority of Raman enhancement by the MFs. Moreover, the MF can be coupled with surface-enhanced Raman spectroscopy (SERS) to provide an extra >10-fold enhancement. The limit of detection is therefore improved for sensing of crystal violet (CV) and Sudan I molecules in aqueous solutions at concentrations down to 10-7 M. A hybrid dual-layer microsphere enhancer, constructed by depositing a MF onto a microsphere monolayer array, is also demonstrated, wherein the WG-WGMs become dominant and boost the enhancement ratio >50-fold. The present work opens up new opportunities for design of cost-effective and flexible MERS sensing platforms as individual or associated techniques toward practical applications in ultrasensitive Raman detection.

Keyword:

microsphere-enhanced Raman spectroscopy surface-enhanced Raman spectroscopy flexible Raman enhancer PDMS film dielectric microsphere

Author Community:

  • [ 1 ] [Xing, Cheng]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 2 ] [Yan, Yinzhou]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Feng, Chao]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 4 ] [Xu, Jiayu]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 5 ] [Guan, Wei]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 6 ] [Zeng, Yong]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 7 ] [Zhao, Yan]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 8 ] [Jiang, Yijian]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 9 ] [Zeng, Yong]Beijing Univ Technol, Beijing Engn Res Ctr Printing Digital Med Hlth 3D, Beijing 100124, Peoples R China
  • [ 10 ] [Dong, Peng]Capital Aerosp Machinery Co, Beijing 100076, Peoples R China

Reprint Author's Address:

  • 闫胤洲

    [Yan, Yinzhou]Beijing Univ Technol, Inst Laser Engn, 100 Pingleyuan, Beijing 100124, Peoples R China

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Source :

ACS APPLIED MATERIALS & INTERFACES

ISSN: 1944-8244

Year: 2017

Issue: 38

Volume: 9

Page: 32896-32906

9 . 5 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:287

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 41

SCOPUS Cited Count: 45

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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