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Immobilization of Distinctly Capped CdTe Quantum Dots onto Porous Aminated Solid Supports
Author(s) -
Rodrigues S. Sofia M.,
Ribeiro David S. M.,
Frigerio Christian,
Costa Susana P. F.,
Prior João A. V.,
Pinto Paula C. A. G.,
Santos João L. M.,
Saraiva M. Lúcia M. F. S.,
Passos Marieta L. C.
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500159
Subject(s) - quantum dot , adsorption , langmuir , gibbs free energy , freundlich equation , porosity , enthalpy , chemistry , chemical engineering , chemical stability , detection limit , nanotechnology , cadmium telluride photovoltaics , standard molar entropy , materials science , chromatography , thermodynamics , organic chemistry , standard enthalpy of formation , physics , engineering
Immobilization of quantum dots (QDs) onto solid supports could improve their applicability in the development of sensing platforms and solid‐phase reactors by allowing the implementation of reusable surfaces and the execution of repetitive procedures. As the reactivity of QDs relies mostly on their surface chemistry, immobilization could also limit the disruption of solution stability that could prevent stable measurements. Herein, distinct strategies to immobilize QDs onto porous aminated supports, such as physical adsorption and the establishment of chemical linking, were evaluated. This work explores the influence of QD capping and size, concentration, pH, and contact time between the support and the QDs. Maximum QD retention was obtained for physical adsorption assays. Freundlich and Langmuir isotherms were used to analyze the equilibrium data. Gibbs free energy, enthalpy, and entropy were calculated and the stability of immobilized QDs was confirmed.