pH-Triggered Molecular Alignment for Reproducible SERS Detection via an AuNP/Nanocellulose Platform

@inproceedings{Wei2015pHTriggeredMA,
  title={pH-Triggered Molecular Alignment for Reproducible SERS Detection via an AuNP/Nanocellulose Platform},
  author={Haoran Wei and Peter J Vikesland},
  booktitle={Scientific reports},
  year={2015}
}
The low affinity of neutral and hydrophobic molecules towards noble metal surfaces hinders their detection by surface-enhanced Raman spectroscopy (SERS). Herein, we present a method to enhance gold nanoparticle (AuNP) surface affinity by lowering the suspension pH below the analyte pKa. We developed an AuNP/bacterial cellulose (BC) nanocomposite platform and applied it to two common pollutants, carbamazepine (CBZ) and atrazine (ATZ) with pKa values of 2.3 and 1.7, respectively. Simple mixing of… CONTINUE READING
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