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Surface-Enhanced Raman Scattering on Colloid Gels Originated from Low Molecular Weight Gelator


Miljanić, Snežana; Frkanec, Leo; Biljan, Tomislav; Meić, Zlatko; Žinić, Mladen
Surface-Enhanced Raman Scattering on Colloid Gels Originated from Low Molecular Weight Gelator // Journal of Raman Spectroscopy, 39 (2008), 12; 1799-1804 doi:10.1002/jrs.2039 (međunarodna recenzija, članak, znanstveni)


Naslov
Surface-Enhanced Raman Scattering on Colloid Gels Originated from Low Molecular Weight Gelator

Autori
Miljanić, Snežana ; Frkanec, Leo ; Biljan, Tomislav ; Meić, Zlatko ; Žinić, Mladen

Izvornik
Journal of Raman Spectroscopy (0377-0486) 39 (2008), 12; 1799-1804

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Gel; gold colloid; low molecular weight organic gelator; silver colloid; surface-enhanced Raman scattering

Sažetak
Surface-enhanced Raman scattering (SERS) on silver and gold colloid gels formed by a low molecular weight organic gelator, bis-(S-phenylalanine) oxalyl amide, was obtained. Strong Raman signals dominate in SERS spectra of hydrogels containing silver nanoparticles prepared by citrate and borohydride reduction methods, whereas broad bands of low intensity are detected in spectra of gold colloid gels. Resemblance between Raman spectrum of the crystalline substance and SERS spectra of the silver nanoparticle-hydrogel composites implies electromagnetic nature of the signal enhancement. A change in Raman intensity of the benzene and amide II bands caused by temperature and concentration increase indicates that the gelling molecules are strongly attached through the benzene moieties to the metal nanoparticles while participating in gel formation by intermolecular hydrogen bonding between the adjacent oxalyl amide groups. Transmission electron microscopy reveals a dense gel structure in the close vicinity of the enhancing metal particles for both silver colloid gels.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2912 - Samo-udruživanje u gelovima i sinteza funkcionalnih hibridnih materijala (Leo Frkanec, )
119-1191342-2959 - Spektroskopska analiza nezasićenih sustava i spojeva metala (Snežana Miljanić, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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