Publications by authors named "Helena S Nakatani"
Thiosemicarbazone@Gold nanoparticle hybrid as selective SERS substrate for Hg ions.
Douglas S Franciscato Tiago A Matias Jorge Shinohara Josué M Gonçalves Narcimário P Coelho Helena S Nakatani
Spectrochim Acta A Mol Biomol Spectrosc
November 2018
Article Synopsis
- The presence of gold nanoparticles changes the Raman spectral profile of p-methylcarbohydrazonethioamide (MCHT) due to strong Surface-Enhanced Raman Scattering (SERS) effects.
- Most metal ions do not show SERS response, indicating that bonding sites on the MCHT are occupied by gold nanoparticles, making them unavailable for other metal ion binding, except for Hg(II) ions.
- The enhancement of specific vibrational modes when Hg(II) binds to the MCHT-AuNP hybrid suggests significant conformational changes, supporting its use as a highly selective and sensitive SERS substrate.