Synthesis and surface modification of biocompatible water soluble core-shell quantum dots

• Main Authors: Abd. Rahman, Samsulida, Ariffin, Nurhayati, Yusof, Nor Azah, Abdullah, Jaafar, Ahmad Zubir, Zuhana, Nik Abdul Aziz, Nik Mohd Azmi, Azmi, Nur Ellina, Sidek, Hamidah, Ramli, Noor Izaanin
• Format: Article
• Language: English
• Published: Trans Tech Publications 2014
• Online Access: http://psasir.upm.edu.my/id/eprint/35573/1/Synthesis%20and%20surface%20modification%20of%20biocompatible%20water%20soluble%20core-shell%20quantum%20dots.pdf; http://psasir.upm.edu.my/id/eprint/35573/; https://www.scientific.net/AMR.879.184
• Institution: Universiti Putra Malaysia

In this study, the applications of CdSe/ZnS quantum dots (QDs) and its role in advanced sensings has been explored. The CdSe/ZnS was synthesized by using hot injection method with the shell ZnS layer was made using successive ionic layer adsorption and reaction (SILAR) method. The morphology of the CdSe/ZnS QDs was studied using Transmission Electron Microscope (TEM) and the average particle size was in 10-12 nm range. The prepared QDs were optically characterized using spectrofluorescence and strong emission was observed at 620 nm. Comparison of the fluorescence emissions of CdSe/ZnS capped with various capping ligands such as L-cysteine, thioglycolic acid (TGA), mercaptopropionic acid (MPA), mercaptosuccinic acid (MSA) and mercaptoundecanoic acid (MUA) were studied. The CdSe/ZnS capped with TGA gave the strongest fluorescence emission compared to others.