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1
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0041323707
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D. D. Awschalom, N. Samarth, D. Loss, Eds. (Springer-Verlag, Berlin, Germany)
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G. Burkard, D. Loss, in Semiconductor Spintronics and Quantum Computation, D. D. Awschalom, N. Samarth, D. Loss, Eds. (Springer-Verlag, Berlin, Germany, 2002), pp. 229-276.
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(2002)
Semiconductor Spintronics and Quantum Computation
, pp. 229-276
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Burkard, G.1
Loss, D.2
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2
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0001337777
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J. A. Gupta, D. D. Awschalom, X. Peng, A. P. Alivisatos, Phys. Rev. B 59, 10421 (1999).
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(1999)
Phys. Rev. B
, vol.59
, pp. 10421
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Gupta, J.A.1
Awschalom, D.D.2
Peng, X.3
Alivisatos, A.P.4
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10
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0642335629
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S. A. Crooker, D. D. Awschalom, J. J. Baumberg, F. Flack, N. Samarth, Phys. Rev. B 56, 7574 (1997).
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(1997)
Phys. Rev. B
, vol.56
, pp. 7574
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Crooker, S.A.1
Awschalom, D.D.2
Baumberg, J.J.3
Flack, F.4
Samarth, N.5
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11
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0041323709
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note
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Materials and methods are available as supporting material on Science Online.
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12
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0042826332
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note
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Several techniques were applied to characterize our samples. Atomic force microscopy (AFM) (Nanoscope Ill, Veeco Instruments) was used to characterize the topography of samples immediately after assembly. The images show high density and uniform coverage of CdSe QDs on the fused silica substrate over a large (micrometer) scale (Fig. 1B, inset). Formation of multilayer structures is further confirmed with the observation of a steady increase of optical density as the number of assembled layers increased consecutively.
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14
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0041323708
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The relative intensities of these two peaks are found to change with the compositions of 7.0- and 3.4-nm QDs in the different multilayer samples prepared, which further confirms that these two peaks belong to QDs of different sizes in sample ABAABA.
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15
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0035859045
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I. Malajovich, J. J. Berry, N. Samarth, D. D. Awschalom, Nature 411, 770 (2001).
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(2001)
Nature
, vol.411
, pp. 770
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Malajovich, I.1
Berry, J.J.2
Samarth, N.3
Awschalom, D.D.4
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18
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0042826330
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note
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Theoretical molecular lengths of TOPO and 1,4-benzenedimethanethiol are ∼1.1 and ∼0.8 nm, respectively. In real samples, however, these molecules may be stretched or compressed. In addition, because TOPO ligands are longer than 1,4-benzenedimethanethiol, the cross-linkages of lateral QDs are very unlikely.
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23
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0030741403
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X. Peng, T. E. Wilson, A. P. Alivisatos, P. G. Schultz, Angew. Chem. Int. Ed. Engl. 36, 145 (1997).
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(1997)
Angew. Chem. Int. Ed. Engl.
, vol.36
, pp. 145
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Peng, X.1
Wilson, T.E.2
Alivisatos, A.P.3
Schultz, P.G.4
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27
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0041323681
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note
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We emphasize that a molecule in a self-assembled structure should have different conformational energetics compared with a molecule in either solution or crystal. For example, the QD-sulfur bonds as well as the intermolecular spacing should put constraints on molecular orientations. Our molecular simulations further suggest that the transition and the saturation behavior of STP result from the collective motion of neighboring molecules due to the molecule-molecule interactions and closely packed structures in samples (29). In addition, although this model uses dynamic wave function coupling between QDs through conjugated molecular π-orbitals, this mechanism may be related to the discussion of superexchange in supramolecular structures.
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30
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0041323706
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note
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We thank G. Steeves, M. Poggio, R. Epstein, J. Gupta, Y. Kato, J. F. Wang, and J. P. Zhang for helpful discussions. Supported by the Defense Advanced Research Projects Agency, the Office of Naval Research, and NSF.
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