Investigation of the Ligand Exchange Process on Gold Nanorods by Using Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

Seung Woo Kim, Young Won Kim, Tae Hoon Seo, Young Kwan Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The ligand exchange process on gold nanorods (Au NRs) was explored by using laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS). Cetyltrimethylammonium bromide (CTAB) adsorbed on Au NRs was replaced with alkanethiol derivatives presenting different functional groups. The ligand exchange process was investigated under various conditions, such as in the presence of different functional groups in the ligands and with different concentrations of CTAB. The ligand-exchanged Au NRs were characterized by using a combination of UV–Vis spectroscopy and LDI-TOF-MS. Based on the results, it was revealed that LDI-TOF-MS analysis can provide crucial and distinct information about the degree of ligand exchange on Au NRs.

Original languageEnglish
Article number4406
JournalMaterials
Volume15
Issue number13
DOIs
StatePublished - 1 Jul 2022

Keywords

  • gold nanorods
  • laser desorption/ionization
  • ligand exchange
  • surface modification
  • surface plasmon resonance

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