Gold-assembled silica-coated cobalt nanoparticles as efficient magnetic   separation units and surface-enhanced Raman scattering substrate

Lütfiye Sezen YILDIRIM; Murat KAYA; Mürvet VOLKAN

Makale detayları

Gold-assembled silica-coated cobalt nanoparticles as efficient magnetic separation units and surface-enhanced Raman scattering substrate

Yazarlar:

Lütfiye Sezen YILDIRIM | Murat KAYA | Mürvet VOLKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2019 Vol.43 Issue 1, pp.307-318

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000725897

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Magnetic and optical bifunctional nanoparticles that combine easy   separation, preconcentration, and efficient SERS capabilities have been   fabricated with high sensitivity and reproducibility through a low-cost   method. These gold nanoparticles attached on magnetic silica-coated cobalt   nanospheres (Co@SiO22_{2}/AuNPs) display the advantage of strong resonance   absorption due to gaps at nanoscale between neighboring metal nanoparticles   bringing large field enhancements, known as "hot spots". The prepared   particles can be controlled by using an external magnetic field, which makes   them very promising candidates in biological applications and Raman   spectroscopic analysis of dissolved organic species. The magnetic property   of the prepared particles lowers the detection limits through   preconcentration with solid-phase extraction in SERS analysis. The   performance of the prepared nanostructures was evaluated as a SERS substrate   using brilliant cresyl blue (BCB) and rhodamine 6G (R6G) as model compounds.   The solid-phase affinity extraction of 4-mercapto benzoic acid (4-MBA) using   bifunctional Co@SiO22_{2}/AuNPs nanoparticles followed by magnetic   separation and the measurement of the SERS signal on the same magnetic   particles without elution were investigated. Approximately 50-fold increase   in SERS intensity was achieved through solid-phase extraction of 8.3   x 10−6−6^{-6} M 4-MBA in 10 min.

Makale detayları

Gold-assembled silica-coated cobalt nanoparticles as efficient magnetic separation units and surface-enhanced Raman scattering substrate

Yazarlar: Lütfiye Sezen YILDIRIM | Murat KAYA | Mürvet VOLKAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2019 Vol.43 Issue 1, pp.307-318

Belge Tipi: Makale

Yayın Tarihi: 1/2019

Belge Dili: Türkçe

Document ID (Org No.): 2000725897

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Lütfiye Sezen YILDIRIM | Murat KAYA | Mürvet VOLKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2019 Vol.43 Issue 1, pp.307-318

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000725897

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527