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Volumn 301, Issue 5636, 2003, Pages 1074-1078

Coherent spin transfer between molecularly bridged quantum dots

Author keywords

[No Author keywords available]

Indexed keywords

FARADAY EFFECT; MOLECULES; ROTATION; SPECTROSCOPIC ANALYSIS;

EID: 0041429278     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1086963     Document Type: Article
Times cited : (251)

References (30)
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    • D. D. Awschalom, N. Samarth, D. Loss, Eds. (Springer-Verlag, Berlin, Germany)
    • 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.
    • (2002) Semiconductor Spintronics and Quantum Computation , pp. 229-276
    • Burkard, G.1    Loss, D.2
  • 11
    • 0041323709 scopus 로고    scopus 로고
    • note
    • Materials and methods are available as supporting material on Science Online.
  • 12
    • 0042826332 scopus 로고    scopus 로고
    • note
    • 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.
  • 14
    • 0041323708 scopus 로고    scopus 로고
    • note
    • 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.
  • 18
    • 0042826330 scopus 로고    scopus 로고
    • note
    • 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.
  • 20
    • 0031849107 scopus 로고    scopus 로고
    • June
    • Special issue on Molecular Electronics: Science and Technology, A. Aviram, M. Ratner, Eds., Ann. N.Y. Acad. Sci. 852 (June 1998).
    • (1998) Ann. N.Y. Acad. Sci. , vol.852
    • Aviram, A.1    Ratner, M.2
  • 27
    • 0041323681 scopus 로고    scopus 로고
    • note
    • 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.
  • 30
    • 0041323706 scopus 로고    scopus 로고
    • note
    • 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.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.