Fabrication and Characterization of Au-Decorated MCM-41 Mesoporous Spheres Using Laser-Ablation Technique

Hassan S. Al Qahtani*, Sultan Akhtar, Mir Waqas Alam, Mohammad Kamal Hossain, Abbad Al Baroot, Muidh Alheshibri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This study reports the synthesis of Au-decorated MCM-41 mesoporous nanoparticles using a laser-ablation technique. It was observed that the number of Au attached to MCM-41 nanostructures was dependent on the amount of encapsulated Cationic surfactant (cetyl ammonium bromide (CTAB) volume. The chemical group of the prepared nanoparticles was analyzed by FT-IR spectroscopy, where different absorption peaks corresponding to Au and MCM-41 were observed. The observed band region was ∼1090, 966, 801, 2918, and 1847 cm−1 for different samples, clearly confirming the successful preparation of MCM-41 with CTAB and Au-decorated MCM-41 nanoparticles using environmentally friendly laser-ablation approach. The surface morphology of the prepared nanoparticles were performed using TEM techniques. The TEM analysis of the MCM-41 specimen showed silica spheres with an average size of around 200 nm. Furthermore, Raman spectroscopy was done to evaluate the chemical structure of the prepared nanoparticles. It was seen that the prepared Au NPs decorated the MCM-41 system facilitated strong Raman peaks of CTAB. In addition, eight distinct Raman peaks were observed in the presence of Au NPs. This new functionalized method using the laser-ablation approach for mesoporous nanoparticles will participate effectively in multiple applications, especially the encapsulated molecule sensing and detection.

Original languageEnglish
Article number7470
Issue number21
StatePublished - Nov 2022

Bibliographical note

Funding Information:
The authors acknowledge the support from Saudi Aramco Company towards this collaboration study.

Publisher Copyright:
© 2022 by the authors.


  • gold target and gold nanoparticles
  • laser ablation
  • liquid media
  • mesoporous silica spheres

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics


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