Continuous-wave two-photon excitation of individual CdS nanocrystallites

van Oijen, A. M.; Verberk, R.; Durand, Y.; Schmidt, J.; van Lingen, J. N. J.; Bol, A. A.; Meijerink, A.
August 2001
Applied Physics Letters;8/6/2001, Vol. 79 Issue 6
Academic Journal
By use of low-temperature confocal microscopy, continuous-wave two-photon fluorescence images are obtained of individual CdS nanocrystallites embedded in a polymer matrix. The quadratic dependence of the emission rate on the applied laser power proves that the observed fluorescence originates from the simultaneous absorption of two photons. From the experimental data the two-photon absorption cross-section σ[sup (2)] could be determined, resulting in a value smaller than that known from literature. The work presented is a first step towards high-resolution fluorescence-excitation spectroscopy on the electronic states in the band edge, inaccessible by conventional one-photon spectroscopy. © 2001 American Institute of Physics.


Related Articles

  • X-ray studies of polymer/gold nanocomposites. Lin, Binhua; Morkved, Terry L. // Journal of Applied Physics;3/15/1999, Vol. 85 Issue 6, p3180 

    Focuses on a study which showed that x-ray reflection standing wave fluorescence spectroscopy are highly sensitive techniques for probing the spatial distribution of gold nanoparticles in polymer thin films. Experimental methods of the study; Result and discussion; Conclusions.

  • Calculation of x-ray emission spectra of molecules and polymers by the Green’s function method. Liegener, Christoph; Ågren, Hans // Journal of Chemical Physics;8/15/1993, Vol. 99 Issue 4, p2821 

    We use the one-particle Green’s function for calculations of x-ray spectra of molecules and polymers. The x-ray rates are obtained as the residues of the one-particle Green’s function modulated by x-ray orbital transition moments. The latter are optionally decomposed into atomic...

  • The electronic structure of polyaniline and doped phases studied by soft x-ray absorption and... Magnuson, M.; Guo, J.-H.; Butorin, S.M.; Agui, A.; Sathe, C.; Nordgren, J.; Monkman, A.P. // Journal of Chemical Physics;9/8/1999, Vol. 111 Issue 10, p4756 

    Studies the electronic structure of the conjugated polymer, polyaniline, by resonant and nonresonant soft x-ray emission spectroscopy using synchrotron radiation for the excitation. Depletion of the pi electron bands shown by the resonant x-ray emission spectra; Attribution of the valence band...

  • Surface modification and structuring of electrical conducting and isolating polyaniline films. Lippert, T.; Raimondi, F.; Wambach, J.; Wei, J.; Wokaun, A. // Applied Physics A: Materials Science & Processing;1999, Vol. 69 Issue 7, pS291 

    Abstract. Laser ablation of polyaniline in its conducting and isolating form revealed very similar ablation properties upon irradiation at 308 nm. Both types of polymer film can be structured with high resolution at high fluences. The ablation craters have sharp contours and no debris...

  • Chemical short-range order in liquid Al–Ni alloys. Egry, Ivan; Hennet, Louis; Kehr, Mirko; Mathiak, Gerhard; De Panfilis, Simone; Pozdnyakova, Irina; Zanghi, Didier // Journal of Chemical Physics;8/14/2008, Vol. 129 Issue 6, p064508 

    The chemical short-range structure was studied in liquid Al–Ni alloys by x-ray absorption spectroscopy as a function of temperature and composition. A containerless technique, combining aerodynamic levitation and inductive heating, was used to position and melt the samples. The...

  • Preparation of Polyaminopyridines Using a CuI/L-Proline-Catalyzed C-N Polycoupling Reaction. Reis, Lindomar A.; Ligiéro, Carolina B. P.; Andrade, Acácio A.; Taylor, Jason G.; Miranda, Paulo C. M. L. // Materials (1996-1944);Nov2012, Vol. 5 Issue 11, p2176 

    Polyaminopyridines (PAPy) were chemically prepared from amino-bromopyridines by a CuI/L-proline-catalyzed C-N polycondensation reaction. The formation of the polymer was confirmed by GPC, XRD, XRF, FTIR, UV-vis (λmax = 400 nm), 1H and 13C NMR. The number-average molecular weights (Mn) were...

  • Energy dispersive x-ray reflectivity technique to study thermal properties of polymer films. Bhattacharya, M.; Mukherjee, M.; Sanyal, M. K.; Geue, Th.; Grenzer, J.; Pietsch, U. // Journal of Applied Physics;9/1/2003, Vol. 94 Issue 5, p2882 

    A method to study temperature dependent thickness variation of thin films has been developed based on angle and energy dispersive x-ray reflectivity (EDR) techniques. The data analysis scheme developed for this method combines both energy and angle dispersive x-ray reflectivity (ADR) profiles....

  • Advantages of Applying a Steam Curing Cycle for the Production of Kaolinite-Based Geopolymers. Hamaideh, Arwa; Komnitsas, Kostas; Esaifan, Muayad; Al-Kafawein, Juma'a; Rahier, Hubert; Alshaaer, Mazen // Arabian Journal for Science & Engineering (Springer Science & Bu;Nov2014, Vol. 39 Issue 11, p7591 

    In this study, a new approach, which involves the application of a steam curing cycle for the production of kaolinite-based geopolymers, is investigated. This approach aimed to accelerate geopolymeric reactions and eliminate the content of residual alkalis within the geopolymer mass and the...

  • Introduction of Soft X-Ray Spectromicroscopy as an Advanced Technique for Plant Biopolymers Research. Karunakaran, Chithra; Christensen, Colleen R.; Gaillard, Cedric; Lahlali, Rachid; Blair, Lisa M.; Perumal, Vijayan; Miller, Shea S.; Hitchcock, Adam P. // PLoS ONE;Mar2015, Vol. 10 Issue 3, p1 

    Soft X-ray absorption spectroscopy coupled with nano-scale microscopy has been widely used in material science, environmental science, and physical sciences. In this work, the advantages of soft X-ray absorption spectromicroscopy for plant biopolymer research were demonstrated by determining the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics