Towards PCR-free mutation detection based on surface-enhanced Raman scattering

Mustafa Culha, Omer F. Karatas, Omer Aydin, Mehmet Kahraman, Kemal Keseroǧlu, Ismail Sayin, Omer F. Bayrak

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The development of an assay for the detection of gene mutations has been attempted based on surface-enhanced Raman scattering (SERS). Using multiplexing property and high sensitivity of SERS technique, the detection of all mutation possibilities on one given spot is achievable. To test the feasibility of approach, SNPs and other types of mutations such as insertion and deletion are investigated. The PCR amplified and isolated genomic DNA without PCR amplification is immobilized on poly-L/D-lysine coated glass surface after denaturing with heating. The SERS probes are prepared by simultaneous attachment of oligonucleotides complementary to the target mutation regions and Raman active dyes to 13 nm gold nanoparticles (GNPs). After the hybridization of SERS probes on the poly-L/D-lysine surfaces, it was stained with silver colloidal nanoparticles for further enhancement of Raman scattering. In the second approach, Raman active dyes are chemically attached on gold nanoparticles and a thin layer of silverfilm is deposited on top of it to prepare coreshell nanoparticles. The complementary oligonucleotides to the target regions of the gene are chemically attached to silver surfaces of the nanoparticles. The promising results indicate that it is possible to detect certain mutation types without PCR amplification using the approach.

Original languageEnglish (US)
Title of host publicationPlasmonics in Biology and Medicine VI
StatePublished - 2009
Externally publishedYes
EventPlasmonics in Biology and Medicine VI - San Jose, CA, United States
Duration: Jan 26 2009Jan 27 2009

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferencePlasmonics in Biology and Medicine VI
Country/TerritoryUnited States
CitySan Jose, CA


  • Biochip
  • Multiplexing
  • Mutation
  • PCR
  • SERS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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