Quats stabilized gold nanospheres for efficient ligand exchange procedure

Results in Materials

Muhammad Naeem Anjum¹  Muhammad Arshad²  Muhammad Irfan³  Gul Naz³  Muniba³  Masooma Irfan⁴  Sadia Z. Bajwa⁵  Waheed S. Khan⁶ 

[1] Corresponding author.;Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Defence. Road, Off Raiwind Road, Lahore, Pakistan;Department of Physics, Faculty of Science, The Islamia University of Bahawalpur, Baghdad-ul-Jadid Campus, Bahawalpur, 63100, Pakistan;Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore, Pakistan;Nanosciences and Nanotechnology Department, National Cener for Physics, Quaid-i-Azam University Islamabad, Pakistan;National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan;

关键词: Didecyldimethylammonium chloride (DDAC);    Gold nanospheres;    Ligand exchange;    Visible luminescence and single molecular tracking;   

DOI  :  

来源: DOAJ

【 摘 要 】

In present work, fine spherical shaped gold nanoparticles are prepared by using a new type of quaternary ammonium cationic surfactant (quats) i.e. didecyldimethylammonium chloride (DDAC) following one step room temperature method. Optical characterization and crystal symmetry has been observed through UV–Vis spectroscopy and XRD analysis, respectively. DDAC coated gold nanospheres (GNSs) are also analysed by using FTIR technique in order to observe binding of the ligand onto the surface of gold. Ligand weight loss has been determined by using TGA technique. Particle size has been examined by using TEM and DLS techniques both. Stability of DDAC coated gold nanoparticles are also examined by using Zeta-potential. A comparison of stabilities of different quats stabilized gold nanoparticles (GNPs) has also been discussed in the present work. Unlike usual CTAB and CTAC ligands, the low binding affinity of DDAC to the gold surface may be more efficient for ligand-exchange procedure. A sharp and fine peak of PL spectrum at around 600 ​nm has been noticed for these GNSs. These luminescent, monodispersed and fine spherical shaped GNPs of size less than 40 ​nm can be valuable in plasmonics and single molecular tracking for further characterizations.

【 授权许可】

Unknown