Optically Trapped Surface-Enhanced Raman Probes Prepared by Silver Photoreduction to 3D Microstructures.
3D microstructures partially covered by silver nanoparticles have been developed and tested for surface-enhanced Raman spectroscopy (SERS) in combination with optical tweezers. The microstructures made by two-photon polymerization of SU-8 photoresist were manipulated in a dual beam optical trap. The active area of the structures was covered by a SERS-active silver layer using chemically assisted photoreduction from silver nitrate solutions. Silver layers of different grain size distributions were created by changing the photoreduction parameters and characterized by scanning electron microscopy. The structures were tested by measuring the SERS spectra of emodin and hypericin.
Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences , Temesvári krt. 62, Szeged, Hungary.
Gaszton
G
Vizsnyiczai
Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences , Temesvári krt. 62, Szeged, Hungary.
Tamás
T
Lestyán
Jaroslava
J
Joniova
Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences , Temesvári krt. 62, Szeged, Hungary.
Badri L
BL
Aekbote
Department of Chemistry, Biochemistry and Biophysics, Institute of Biophysics, University of Veterinary Medicine and Pharmacy , Komenského 73, 04181 Košice, Slovakia.
Alena
A
Strejčková
Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences , Temesvári krt. 62, Szeged, Hungary.
Pál
P
Ormos
Pavol
P
Miskovsky
Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences , Temesvári krt. 62, Szeged, Hungary.
Lóránd
L
Kelemen
Gregor
G
Bánó
D008855:Microscopy, Electron, Scanning; D015335:Molecular Probes; D010084:Oxidation-Reduction; D010777:Photochemistry; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
D015335:Molecular Probes; D012834:Silver