Enhanced absorption and fluorescence of gold nanoclusters using initial alkali concentrations

Trong Nghia Nguyen, Thi Hue Do, Dinh Hoang Nguyen, Duong Vu, Quang Hoa Do, Hong Nhung Tran, Thi Ha Lien Nghiem

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Understanding carrier dynamics and electromagnetic interactions between emerging quantum-confined nanostructures and plasmonic structures is crucial for future biological applications. In this research, we fabricate gold monolayer-protected clusters (AuMPC). We demonstrate enhanced light absorption and fluorescence of AuMPCs by varying the initial alkali concentration. We measure absorption bands enhanced up to nine times with extended and distinct features centered at 3.33 eV, and fluorescence enhanced up to 3.9 times. An increased alkali concentration changes the charge transfer capability of the surface thiolate ligands through sulfur-gold bonds, which in turn enhance/reduce the fluorescence intensity.

Original languageEnglish
Article number022001
JournalApplied Physics Express
Issue number2
Publication statusPublished - Feb 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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