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Biju, Vasudevanpillai; Hamada, Morihiko; Shibu, Edakkattuparambil Sidharth; Itoh, Tamitake; Kiran, Manikantan Syamala; Nakanishi, Shunsuke; Ishikawa, Mitsuru (2011)
Publisher: Co-Action Publishing
Journal: Nano Reviews
Languages: English
Types: Article
Subjects: quantum dots; single-molecule; electron transfer; Auger ionization; CdSe/ZnS; photoluminescence; photochemical reaction
Photoinduced electron transfer in donor-acceptor systems composed of quantum dots (QDs) and electron donors or acceptors is a subject of considerable recent research interest due to the potential applications of such systems in both solar energy harvesting and degradation of organic pollutants. Herein, we employed single-molecule imaging and spectroscopy techniques for the detection of photochemical reactions between 1,4-diaminobutane (DAB) and CdSe/ZnS single QDs. We investigated the reactions by analyzing photoluminescence (PL) intensity and lifetime of QDs at ensemble and single-molecule levels. While DAB was applied to single QDs tethered on a cover slip or QDs dispersed in a solution, PL intensity of QD continuously decreased with a concomitant increase in the PL lifetime. Interestingly, these changes in the PL properties of QD were predominant under high-intensity photoactivation. We hypothesize that the above changes in the PL properties surface due to the transfer of an electron from DAB to Auger-ionized QD followed by elimination of a proton from DAB and the formation of a QD-DAB adduct. Thus, a continuous decrease in the PL intensity of QDs under high-intensity photoactivation is attributed to continuous photochemical reactions of DAB with single QDs and the formation of QD-(DAB)n adducts. We believe that detection and analysis of such photochemical reactions of single QDs with amines will be of considerable broad interest due to the significant impact of photoinduced electron transfer reactions in energy management and environmental remediation.Keywords: quantum dots; single-molecule; electron transfer; Auger ionization; CdSe/ZnS; photoluminescence; photochemical reaction(Published: 13 October 2011)Citation: Nano Reviews 2011, 2: 6366 - DOI: 10.3402/nano.v2i0.6366
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    • 1. Murray CB, Norris DJ, Bawendi MG. Synthesis and characterization of nearly monodisperse CdE (E sulfur, selenium, tellurium) semiconductor nanocrystallites. J Am Chem Soc 1993; 115: 8706 15.
    • 2. Biju V, Itoh T, Anas A, Sujith A, Ishikawa M. Semiconductor quantum dots and metal nanoparticles: syntheses, optical properties, and biological applications. Anal Bioanal Chem 2008; 391: 2469 95.
    • 3. Biju V, Itoh T, Ishikawa M. Delivering quantum dots to cells: bioconjugated quantum dots for targeted and nonspecific extracellular and intracellular imaging. Chem Soc Rev 2010; 39: 3031 56.
    • 4. Wood V, BulovicĀ“ V. Colloidal quantum dot light-emitting devices. Nano Rev 2010; 1: 5202 8.
    • 5. Robel I, Subramanian V, Kuno M, Kamat PV. Quantum dot solar cells. Harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films. J Am Chem Soc 2006; 128: 2385 93.
    • 6. Kamat PV. Quantum dot solar cells. Semiconductor nanocrystals as light harvesters. J Phys Chem C 2008; 112: 18737 53.
    • 7. Robel I, Kuno M, Kamat PV. Size-dependent electron injection from excited CdSe quantum dots into TiO2 nanoparticles. J Am Chem Soc 2007; 129: 4136 7.
    • 8. Jin S, Lian T. Electron transfer dynamics from single CdSe/ ZnS quantum dots to TiO2 nanoparticles. Nano Lett 2009; 9: 2448 54.
    • 9. Hamada M, Nakanishi S, Itoh T, Ishikawa M, Biju V. Blinking suppression in CdSe/ZnS single quantum dots by TiO2 nanoparticles. ACS Nano 2010; 4: 4445 54.
    • 10. Jin S, Song N, Lian T. Suppressed blinking dynamics of single QDs on ITO. ACS Nano 2010; 4: 1545 52.
    • 11. Huang J, Stockwell D, Huang Z, Mohler DL, Lian T. Photoinduced ultrafast electron transfer from CdSe quantum dots to re-bipyridyl complexes. J Am Chem Soc 2008; 130: 5632 3.
    • 12. Song N, Zhu H, Jin S, Zhan W, Lian T. Poisson-distributed electron-transfer dynamics from single quantum dots to C60 molecules. ACS Nano 2011; 5: 613 21.
    • 13. Greenham NC, Peng XG, Alivisatos AP. Charge separation and transport in conjugated-polymers/semiconductor-nanocrystal composites studied by photoluminescence quenching and photoconductivity. Phys Rev B 1996; 54: 17628 37.
    • 14. Sharma SN, Pillai ZS, Kamat PV. Photoinduced charge transfer between CdSe quantum dots and p-phenylenediamine. J Phys Chem B 2003; 107: 10088 93.
    • 15. Landes C, Burda C, Braun M, El-Sayed MA. Photoluminescence of CdSe nanoparticles in the presence of a hole acceptor: n-butylamine. J Phys Chem B 2001; 105: 2981 6.
    • 16. Wang X, Qu L, Zhang J, Peng X, Xiao M. Surface-related emission in highly luminescent CdSe quantum dots. Nano Lett 2003; 3: 1103 6.
    • 17. Biju V, Kanemoto R, Matsumoto Y, Ishii S, Nakanishi S, Itoh T, et al. Photoinduced photoluminescence variations of CdSe quantum dots in polymer solutions. J Phys Chem C 2007; 111: 7924 32.
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