"Giant" Multishell CdSe Nanocrystal Quantum Dots With Suppressed Blinking

"Giant" Multishell CdSe Nanocrystal Quantum Dots With Suppressed Blinking

Aug.16-21, 2008 | Yongfen Chen, Javier Vela, Han Htoon, Joanna L. Casson, Donald J. Werder, David A. Bussian, Victor I. Klimov, and Jennifer A. Hollingsworth
Los Alamos National Laboratory, operated by Los Alamos National Security, LLC for the U.s. Department of Energy, is an affirmative action/equal opportunity employer. The laboratory supports academic freedom and researchers' right to publish, but does not endorse or guarantee the technical correctness of publications. The article discusses "giant" multishell CdSe nanocrystal quantum dots with suppressed blinking. The study shows that by confining the wavefunction in a thick shell, blinking can be significantly reduced. The blinking behavior of CdSe/nCdS quantum dots was analyzed over time and compared with shell thickness. The results indicate that thicker shells suppress blinking. The study also examines photostability and blinking behavior in relation to ligands and solvents. The research team, including Yongfen Chen, Javier Vela, Han Htoon, and others, conducted experiments using excitation at 532 nm with 180 mW power, over 54 minutes with 200 ms binning. The blinking behavior was observed for different shell thicknesses, including CdSe/4CdS, CdSe/7CdS, CdSe/9CdS, and CdSe/19CdS. The study also includes control experiments, such as DLS analyses of concentrated solutions and concentration dependence studies. The research is supported by LANL LDRD and the DOE Center for Integrated Nanotechnologies. The findings have implications for improving the performance of quantum dots in various applications. The study highlights the importance of shell thickness in controlling blinking, which is crucial for the stability and reliability of quantum dot-based technologies. The research contributes to the understanding of quantum dot behavior and offers potential improvements in their application.Los Alamos National Laboratory, operated by Los Alamos National Security, LLC for the U.s. Department of Energy, is an affirmative action/equal opportunity employer. The laboratory supports academic freedom and researchers' right to publish, but does not endorse or guarantee the technical correctness of publications. The article discusses "giant" multishell CdSe nanocrystal quantum dots with suppressed blinking. The study shows that by confining the wavefunction in a thick shell, blinking can be significantly reduced. The blinking behavior of CdSe/nCdS quantum dots was analyzed over time and compared with shell thickness. The results indicate that thicker shells suppress blinking. The study also examines photostability and blinking behavior in relation to ligands and solvents. The research team, including Yongfen Chen, Javier Vela, Han Htoon, and others, conducted experiments using excitation at 532 nm with 180 mW power, over 54 minutes with 200 ms binning. The blinking behavior was observed for different shell thicknesses, including CdSe/4CdS, CdSe/7CdS, CdSe/9CdS, and CdSe/19CdS. The study also includes control experiments, such as DLS analyses of concentrated solutions and concentration dependence studies. The research is supported by LANL LDRD and the DOE Center for Integrated Nanotechnologies. The findings have implications for improving the performance of quantum dots in various applications. The study highlights the importance of shell thickness in controlling blinking, which is crucial for the stability and reliability of quantum dot-based technologies. The research contributes to the understanding of quantum dot behavior and offers potential improvements in their application.
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[slides and audio] %22Giant%22 multishell CdSe nanocrystal quantum dots with suppressed blinking.