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Volumn 109, Issue 15, 2005, Pages 7012-7021

Ligand effects on optical properties of CdSe nanocrystals

Author keywords

[No Author keywords available]

Indexed keywords

BAND EDGE; CHARGE SEPARATION; SURFACE LIGANDS; TRIOCTYLPHOSPHINES;

EID: 18144375571     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp045352x     Document Type: Article
Times cited : (415)

References (56)
  • 45
    • 18144373054 scopus 로고    scopus 로고
    • note
    • 31 P NMR peaks of CdSe NCs, they can be only due to either surface-bound TOPO or TOPSe.
  • 47
    • 18144364648 scopus 로고    scopus 로고
    • note
    • The purification was done 3 weeks after the synthesis, and all optical measurements were carried out immediately after the purification to minimize the effect of aging.
  • 48
    • 18144381528 scopus 로고    scopus 로고
    • note
    • For all the data in Table 2 and Figure 2a,b, the PL intensities were normalized by the UV/vis spectral absorbance at the excitation wavelength (380 nm). The data shown in Figure 2c are not normalized.
  • 49
    • 18144410158 scopus 로고    scopus 로고
    • note
    • TOPO also could be used for this experiment HDA was chosen because of its stronger effect on PL of CdSe NC solutions (see Table 3 for comparison of effects of TOPO and HDA).
  • 53
    • 18144431316 scopus 로고    scopus 로고
    • note
    • 3 to 0.34% after 1 day following the addition of a large excess of 4-MeOPy. This implies that for concentrated solutions of CdSe NCs the ligand exchange reaction with 4-MeOPy is either very slow or thermo-dynamically not viable.
  • 54
    • 18144419330 scopus 로고    scopus 로고
    • note
    • We were not able to ascertain what conditions are responsible for the difference in behavior (either PL increases and reaches a steady state of PL after addition of TOP, or it passes through a maximum and slowly declines). Purification and aging conditions as well as the initial capping of CdSe NCs (TOPO/TOPSe or ODPA) and concentration of TOP were varied but no reproducible tendency was found, except that for a particular synthesized batch of NCs the observed behavior is reproducible.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.